CN104096539B - A kind of preparation method of macadamia shell adsorbent - Google Patents
A kind of preparation method of macadamia shell adsorbent Download PDFInfo
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Abstract
The invention discloses a kind of is the method that adsorbent prepared by raw material with macadamia shell, comprises the steps: to take macadamia shell as raw material, through cleaning, freeze drying, pulverize, sieve, the ultrasonic and macadamia shell adsorbent that obtains after boiling.Experimental result shows, the adsorbent that the present invention obtains, and can reach 200mg/g to the adsorption capacity of the dye of positive ion.This preparation method technique advantages of simple, cost are low, and the adsorbent obtained has chemically stable and acts charitably, and mechanical strength is high, easily regenerates, and manufacture and can not cause environment in use procedure the advantage of secondary pollution.Can be applicable to treatment of dyeing wastewater, is a kind of Environment-friendlygreen green environmental-protecrubber adsorbent.
Description
Technical field
The present invention relates to a kind of preparation method of macadamia shell adsorbent, belong to field of material preparation.
Background technology
Along with socioeconomic development, the continuous increase of all kinds of enterprise, the discharge of various industrial wastewater also day by day increases, and industrial wastewater causes serious impact, particularly dyeing waste water to human health and ecological environment.Dyeing waste water is processing cotton, fiber crops, chemical fibre and blending product thereof is the waste water that main printing and dyeing mill discharges.Containing a large amount of organic matters in dyeing waste water, entering water body can endanger water environment; Its waste water color and luster is dark, has a strong impact on water body outward appearance.The method of current dye wastewater treatment has flocculence, air-extraction, oxidizing process, membrane separation process, electrolysis and absorption method etc.Wherein absorption method is comparatively one of effective method.Because adsorbent conventional is at present acticarbon, acticarbon advantages of good adsorption effect, but its problem such as to there is cost high, difficult for regeneration.
Queensland nut Latin literary fame; MacadamiaternifoliaF.Muell.Another name: Queensland's chestnut, Australia English walnut, macadamia, belong to Proteaceae.In " Chinese Plants will ", the 24th volume Proteaceae Queensland nut is recorded in belonging to, and its arbor is high 5 ~ 15 meters.Leaf keratin, long 5 ~ 15 centimetres, wide 2 ~ 4.5 centimetres; Long 4 ~ 15 millimeters of petiole.Fruit is spherical, diameter about 2.5 centimetres, the short point of top tool, thick 2 ~ 3 millimeters of pericarp, cracking.Queensland nut originates in Xin Nanweishi state and the Queensland state of Australia.Main product is in states such as the U.S., South Africa, Australia, Kenya, Brazil.China introduced about 1910, was now distributed in the provinces and regions such as China Guangdong, Sichuan, Guangxi, Yunnan, Guizhou, Hainan, Fujian.Among numerous nuts, the economic worth of Queensland nut is the highest, and the reputation usually enjoying " king of dry fruit " claims, and its cultivated area in China is also in continuous increase, and output also constantly increases.
The document at present macadamia shell being applied to water treatment is few, mainly concentrates on and macadamia shell is prepared into active carbon and filtrate.The people such as Chen Ling are in Jilin agricultural, in " preparation of macadamia shell filtrate and the research of the strainability " literary composition delivered in 2011,05:134-137 periodical, by selecting, pulverizing and obtain macadamia shell filtrate after ungrease treatment, for the treatment of swill, its treatment effect is fine.The people such as Liu Xiaofang are at Yunnan Institute for nationalities's journal: natural science edition, 2012, in " macadamia shell active carbon is to the absorption property of Cr (the VI) " literary composition delivered in 21 (3): 178-181 periodicals, soaked by phosphoric acid solution, Muffle furnace activates, dry the macadamia shell active carbon pulverized, it has obvious adsorption effect to Cr (VI).Peaceful equality people is in chemistry of forest product and industry, 2006, " Study on Pyrolysis Characteristics prepared by macadamia shell active carbon " one delivered in 26 (4): 61-64 periodicals is in literary composition, 40% phosphoric acid is adopted to be activator, synchronous TG-DTA analyzer is utilized to inquire into the fuel factor of macadamia shell, thermal weight loss and pyrolysis mechanism, research finds that phosphoric acid solution has obvious catalyzing and carbonizing effect to macadamia shell, use phosphoric acid to soak macadamia shell as activator and prepare active carbon, its charing and activating mechanism are all feasible.The people such as GerrardEddyJaiPoinern at MineralsEngineering, " Adsorptionoftheaurocyanide, the Au (CN) that deliver in 24 (2011): 1694 – 1702 periodicals
2 -complexongranularactivatedcarbonsderivedfrommacadamianut shells – Apreliminarystudy " in a literary composition, have studied the macadamia shell active carbon of carbonization and CO 2 gas-shielded lower activation under nitrogen protection to Au (CN)
- 2adsorption effect.Research finds that Queensland nut active carbon is better than the adsorption effect of cocoanut active charcoal to gold.The people such as OsvaldoPezotiJunior at JournalofAnalyticalandAppliedPyrolysis, " the SynthesisofZnCl delivered in 105 (2014): 166 – 176 periodicals
2-activatedcarbonfrommacadamianutendocarp (Macadamiaintegrifolia) bymicrowave-assistedpyrolysis:OptimizationusingRSMandmet hyleneblueadsorption " in a literary composition, have studied active carbon that the macadamia shell that soaked by zinc chloride is prepared into the adsorption effect of methylene blue.Research finds that its specific area is 600m
2/ g, also there is a lot of acidic-group in its surface, its adsorption capacity reaches 196mg/g.But there is complex manufacturing technology in it, regeneration difficulty, high in cost of production problem.The people such as Shi Liu are at hubei agricultural science, 2009, in " in macadamia shell cellulose and the lignin component analysis " literary composition delivered in 48 (11): 2846-2848 periodicals, the research of macadamia shell is shown, the cellulose of the main component of macadamia shell lignin insoluble with acid, wherein content of cellulose is 34.65%, and sour insoluble content of lignin is 39.75%, and moisture is 8.45%; Its lignin is based on guaiacyl-syringyl lignin.
Above-mentioned paper and patent lay particular emphasis on research and macadamia shell is prepared into active carbon carrys out treatment of dyeing and printing, so directly macadamia shell is processed into a kind of powder sorbent to have theoretical and practical significance for the treatment of dyeing waste water.
Summary of the invention
Goal of the invention: technical problem to be solved by this invention is to provide a kind of method adopting macadamia shell to prepare adsorbent, the method is simply processed into a kind of powder sorbent macadamia shell, it is simple that the method has manufacture craft, the advantage that cost is low, the powder sorbent obtained has that chemical stability is good, mechanical strength is high, easy regeneration and can not cause the advantage of secondary pollution to environment.
For solving the problems of the technologies described above, the technology used in the present invention means are:
Adopt macadamia shell to prepare a method for adsorbent, comprise the steps:
Step 1, pre-treatment step: macadamia shell is cleaned, freeze drying and pulverizing obtain macadamia shell powder for subsequent use;
Step 2, adds 100 ~ 200ml deionized water in a certain amount of macadamia shell powder, obtains solidliquid mixture, carry out ultrasonic process to above-mentioned solidliquid mixture; Heat after ultrasonic process, in heating process, in boiling thing, add boiling water; Stop heating, filter, the product after filtering by washed with de-ionized water, then drying and grinding can obtain required macadamia shell adsorbent.
Wherein, in step 1, described pre-treatment step is specially: macadamia shell is put into thermostat water bath, adopts in 25 ~ 45 DEG C of deionized waters and soaks 5 ~ 8 days; Remove the remaining pulp be attached to inside macadamia shell, continue to be put in 25 ~ 45 DEG C of deionized waters after the macadamia shell eliminating the remaining pulp in inner side is cleaned and soak 5 ~ 8 days; Macadamia shell is placed in-60 ~ 80 DEG C of freeze drier drying and dehydrating 20 ~ 24h, uses pulverizer to pulverize, cross 80 ~ 325 objects and sieve.
Wherein, in step 2, the addition of described macadamia shell powder is: add 100 ~ 200ml deionized water in every gram of macadamia shell powder.
Wherein, in step 2, the power of described ultrasonic process is 30 ~ 50W, and ultrasonic time is 20 ~ 40min.
Wherein, in step 2, after ultrasonic process, solidliquid mixture is placed on electric furnace and boils 60 ~ 240min.
Wherein, in step 2, described baking temperature is 60 DEG C ~ 105 DEG C.
Wherein, after pulverizer pulverizes and sieves, the particle diameter of macadamia shell powder is 0.18 ~ 0.045mm.
Beneficial effect: compared in prior art, by adopting the method for chemical reagent catalysis, macadamia shell is prepared into active carbon, there is complex manufacturing technology in its preparation technology, difficult for regeneration, high in cost of production problem, the present invention adopts macadamia shell to prepare in adsorbent process, do not need to add any chemicals, preparation technology is simple, cost is low, and manufacturing process can not produce secondary pollution to environment, and the adsorbent obtained in the basic conditions, 200mg/g can be reached to the adsorption capacity of methylene blue, it is high that the adsorbent prepared has mechanical strength, chemical stability is good, the advantages such as secondary pollution can not be caused to environment in easy regeneration and use procedure.
Accompanying drawing explanation
Fig. 1 is that the macadamia shell adsorbent that embodiment 7 obtains affects schematic diagram on methylene blue adsorption number effect by pH value;
Fig. 2 is that the macadamia shell adsorbent that embodiment 7 obtains is subject to time effects schematic diagram to methylene blue adsorption number effect;
Fig. 3 is that the macadamia shell adsorbent that embodiment 7 obtains affects schematic diagram on methylene blue adsorption number effect by initial soln concentration;
Fig. 4 is the macadamia shell adsorbent ESEM phenogram (multiplication factor 20000 times) that embodiment 7 obtains;
Fig. 5 is the ESEM phenogram (multiplication factor 20000 times) after the obtained macadamia shell adsorbent dye of positive ion methylene blue of embodiment 7;
Fig. 6 is the macadamia shell adsorbent infrared spectrogram that embodiment 7 obtains;
Fig. 7 is the infrared spectrogram after the obtained macadamia shell adsorbent methylene blue dye of embodiment 7.
Detailed description of the invention
Below in conjunction with specific embodiments and the drawings technical solution of the present invention be further explained and illustrate.
Embodiment 1:
Putting into thermostat water bath reclaiming the macadamia shell that obtains, adopting in the deionized water of 25 DEG C and soaking 8 days, then use pocket knife to scrape off the remaining pulp be attached to inside macadamia shell, to continue to be put in the deionized water of 25 DEG C immersion after cleaning 8 days.Finally be placed on drying and dehydrating 24h in the freeze drier of-60 DEG C, and use pulverizer to pulverize macadamia shell, cross 80 ~ 120 object sieves simultaneously, obtain macadamia shell powder for subsequent use; The deionized water of 100ml is joined in the object macadamia shell powder of 1g80 ~ 120, then power is adopted to be the Ultrasound Instrument of 30W, ultrasonic process 40min, be placed on afterwards on electric furnace and boil 120min, constantly boiling water is added in its process, then adopt washed with de-ionized water clean in the macadamia shell powder boiled, finally put it in baking oven and dry at 60 DEG C, after grinding, obtain macadamia shell adsorbent finished product.
Embodiment 2:
Putting into thermostat water bath reclaiming the macadamia shell that obtains, adopting in the deionized water of 45 DEG C and soaking 5 days, then use pocket knife to scrape off the remaining pulp be attached to inside macadamia shell, to continue to be put in the deionized water of 25 DEG C immersion after cleaning 5 days.Finally be placed on drying and dehydrating 20h in the freeze drier of-80 DEG C, and use pulverizer to pulverize macadamia shell, cross 120 ~ 200 object sieves simultaneously, obtain macadamia shell powder for subsequent use; The deionized water of 150ml is joined in the object macadamia shell powder of 1g120 ~ 200, then power is adopted to be the Ultrasound Instrument of 50W, ultrasonic process 20min, be placed on afterwards on electric furnace and boil 120min, constantly boiling water is added in its process, then adopt washed with de-ionized water clean in the macadamia shell powder boiled, finally put it in baking oven and dry at 60 DEG C, after grinding, obtain macadamia shell adsorbent finished product.
Embodiment 3:
Putting into thermostat water bath reclaiming the macadamia shell that obtains, adopting in the deionized water of 35 DEG C and soaking 7 days, then use pocket knife to scrape off the remaining pulp be attached to inside macadamia shell, to continue to be put in the deionized water of 35 DEG C immersion after cleaning 7 days.Finally be placed on drying and dehydrating 22h in the freeze drier of-70 DEG C, and use pulverizer to pulverize macadamia shell, cross 200 ~ 250 object sieves simultaneously, obtain macadamia shell powder for subsequent use; The deionized water of 200ml is joined in the object macadamia shell powder of 1g200 ~ 250, then power is adopted to be the Ultrasound Instrument of 40W, ultrasonic process 30min, be placed on afterwards on electric furnace and boil 120min, constantly boiling water is added in its process, then adopt washed with de-ionized water clean in the macadamia shell powder boiled, finally put it in baking oven and dry at 60 DEG C, after grinding, obtain macadamia shell adsorbent finished product.
Embodiment 4:
Putting into thermostat water bath reclaiming the macadamia shell that obtains, adopting in the deionized water of 35 DEG C and soaking 7 days, then use pocket knife to scrape off the remaining pulp be attached to inside macadamia shell, to continue to be put in the deionized water of 35 DEG C immersion after cleaning 7 days.Finally be placed on drying and dehydrating 22h in the freeze drier of-70 DEG C, and use pulverizer to pulverize macadamia shell, cross 250 ~ 300 object sieves simultaneously, obtain macadamia shell powder for subsequent use; The deionized water of 200ml is joined in the object macadamia shell powder of 1g250 ~ 300, then power is adopted to be the Ultrasound Instrument of 40W, ultrasonic process 30min, be placed on afterwards on electric furnace and boil 120min, constantly boiling water is added in its process, then adopt washed with de-ionized water clean in the macadamia shell powder boiled, finally put it in baking oven and dry at 60 DEG C, after grinding, obtain macadamia shell adsorbent finished product.
Embodiment 5:
Putting into thermostat water bath reclaiming the macadamia shell that obtains, adopting in the deionized water of 35 DEG C and soaking 7 days, then use pocket knife to scrape off the remaining pulp be attached to inside macadamia shell, to continue to be put in the deionized water of 35 DEG C immersion after cleaning 7 days.Finally be placed on drying and dehydrating 22h in the freeze drier of-70 DEG C, and use pulverizer to pulverize macadamia shell, cross 300 ~ 325 object sieves simultaneously, obtain macadamia shell powder for subsequent use; The deionized water of 200ml is joined in the object macadamia shell powder of 1g300 ~ 325, then power is adopted to be the Ultrasound Instrument of 40W, ultrasonic process 30min, be placed on afterwards on electric furnace and boil 120min, constantly boiling water is added in its process, then adopt washed with de-ionized water clean in the macadamia shell powder boiled, finally put it in baking oven and dry at 60 DEG C, after grinding, obtain macadamia shell adsorbent finished product.
Embodiment 6:
Putting into thermostat water bath reclaiming the macadamia shell that obtains, adopting in the deionized water of 35 DEG C and soaking 7 days, then use pocket knife to scrape off the remaining pulp be attached to inside macadamia shell, to continue to be put in the deionized water of 35 DEG C immersion after cleaning 7 days.Finally be placed on drying and dehydrating 22h in the freeze drier of-70 DEG C, and use pulverizer to pulverize macadamia shell, cross 200 ~ 250 object sieves simultaneously, obtain macadamia shell powder for subsequent use; The deionized water of 200ml is joined in the object macadamia shell powder of 1g200 ~ 250, then power is adopted to be the Ultrasound Instrument of 40W, ultrasonic process 30min, be placed on afterwards on electric furnace and boil 60min, constantly boiling water is added in its process, then adopt washed with de-ionized water clean in the macadamia shell powder boiled, finally put it in baking oven and dry at 60 DEG C, after grinding, obtain macadamia shell adsorbent finished product.
Embodiment 7:
Putting into thermostat water bath reclaiming the macadamia shell that obtains, adopting in the deionized water of 35 DEG C and soaking 7 days, then use pocket knife to scrape off the remaining pulp be attached to inside macadamia shell, to continue to be put in the deionized water of 35 DEG C immersion after cleaning 7 days; Finally be placed on drying and dehydrating 22h in the freeze drier of-70 DEG C, and use pulverizer to pulverize macadamia shell, cross 200 ~ 250 object sieves simultaneously, obtain macadamia shell powder for subsequent use; The deionized water of 200ml is joined in the object macadamia shell powder of 1g200 ~ 250, then power is adopted to be the Ultrasound Instrument of 40W, ultrasonic process 30min, be placed on afterwards on electric furnace and boil 180min, constantly boiling water is added in its process, then adopt washed with de-ionized water clean in the macadamia shell powder boiled, finally put it in baking oven and dry at 60 DEG C, after grinding, obtain macadamia shell adsorbent finished product.
Embodiment 8:
Putting into thermostat water bath reclaiming the macadamia shell that obtains, adopting in the deionized water of 35 DEG C and soaking 7 days, then use pocket knife to scrape off the remaining pulp be attached to inside macadamia shell, to continue to be put in the deionized water of 35 DEG C immersion after cleaning 7 days; Finally be placed on drying and dehydrating 22h in the freeze drier of-70 DEG C, and use pulverizer to pulverize macadamia shell, cross 200 ~ 250 object sieves simultaneously, obtain macadamia shell powder for subsequent use; The deionized water of 200ml is joined in the object macadamia shell powder of 1g200 ~ 250, then power is adopted to be the Ultrasound Instrument of 40W, ultrasonic process 30min, be placed on afterwards on electric furnace and boil 240min, constantly boiling water is added in its process, then adopt washed with de-ionized water clean in the macadamia shell powder boiled, finally put it in baking oven and dry at 60 DEG C, after grinding, obtain macadamia shell adsorbent finished product.
Embodiment 9:
Putting into thermostat water bath reclaiming the macadamia shell that obtains, adopting in the deionized water of 35 DEG C and soaking 7 days, then use pocket knife to scrape off the remaining pulp be attached to inside macadamia shell, to continue to be put in the deionized water of 35 DEG C immersion after cleaning 7 days; Finally be placed on drying and dehydrating 22h in the freeze drier of-70 DEG C, and use pulverizer to pulverize macadamia shell, cross 200 ~ 250 object sieves simultaneously, obtain macadamia shell powder for subsequent use; The deionized water of 200ml is joined in the object macadamia shell powder of 1g200 ~ 250, then power is adopted to be the Ultrasound Instrument of 40W, ultrasonic process 30min, be placed on afterwards on electric furnace and boil 180min, constantly boiling water is added in its process, then adopt washed with de-ionized water clean in the macadamia shell powder boiled, finally put it in baking oven and dry at 80 DEG C, after grinding, obtain macadamia shell adsorbent finished product.
Embodiment 10:
Putting into thermostat water bath reclaiming the macadamia shell that obtains, adopting in the deionized water of 35 DEG C and soaking 7 days, then use pocket knife to scrape off the remaining pulp be attached to inside macadamia shell, to continue to be put in the deionized water of 35 DEG C immersion after cleaning 7 days; Finally be placed on drying and dehydrating 22h in the freeze drier of-70 DEG C, and use pulverizer to pulverize macadamia shell, cross 200 ~ 250 object sieves simultaneously, obtain macadamia shell powder for subsequent use; The deionized water of 200ml is joined in the object macadamia shell powder of 1g200 ~ 250, then power is adopted to be the Ultrasound Instrument of 40W, ultrasonic process 30min, be placed on afterwards on electric furnace and boil 180min, constantly boiling water is added in its process, then adopt washed with de-ionized water clean in the macadamia shell powder boiled, finally put it in baking oven and dry at 105 DEG C, after grinding, obtain macadamia shell adsorbent finished product.
Adopt ultrasonic processing method (physical treatment method) effectively can change the microstructure of macadamia shell adsorbent in preparation method of the present invention, get through the hole of adsorbent, and then increase the specific area of adsorbent, and then effectively can improve the adsorption effect of macadamia shell adsorbent; The time that heating is boiled is longer, removes the better effects if of shuck surface impurity, thus the macadamia shell adsorbent better effects if obtained.
Comparative example 1:
Putting into thermostat water bath reclaiming the happy shell that obtains, adopting in the deionized water of 35 DEG C and soaking 7 days, then use pocket knife to scrape off the remaining pulp be attached to inside happy shell, to continue to be put in the deionized water of 35 DEG C immersion after cleaning 7 days; Finally be placed on drying and dehydrating 22h in the freeze drier of-70 DEG C, and use pulverizer to pulverize happy shell, cross 200 ~ 250 object sieves simultaneously, obtain happy shell powder for subsequent use; The deionized water of 200ml is joined in the happy shell powder of 1g200 ~ 250 object, then power is adopted to be the Ultrasound Instrument of 40W, ultrasonic process 30min, be placed on afterwards on electric furnace and boil 180min, constantly boiling water is added in its process, then adopt washed with de-ionized water clean in the happy shell powder boiled, finally put it in baking oven and dry at 60 DEG C, after grinding, obtain happy shell adsorbent finished product.
Comparative example 2:
Putting into thermostat water bath reclaiming the pine nut shell that obtains, adopting in the deionized water of 35 DEG C and soaking 7 days, then use pocket knife to scrape off the remaining pulp be attached to inside pine nut shell, to continue to be put in the deionized water of 35 DEG C immersion after cleaning 7 days; Finally be placed on drying and dehydrating 22h in the freeze drier of-70 DEG C, and use pulverizer to pulverize pine nut shell, cross 200 ~ 250 object sieves simultaneously, obtain pine nut shell powder for subsequent use; The deionized water of 200ml is joined in the object pine nut shell powder of 1g200 ~ 250, then power is adopted to be the Ultrasound Instrument of 40W, ultrasonic process 30min, be placed on afterwards on electric furnace and boil 180min, constantly boiling water is added in its process, then adopt washed with de-ionized water clean in the pine nut shell powder boiled, finally put it in baking oven and dry at 60 DEG C, after grinding, obtain pine nut shell adsorbent finished product.
Adsorption experiment: the dye of positive ion that the present invention adopts is methylene blue.Take 0.025g macadamia shell adsorbent and add 50ml, concentration is in the methylene blue solution of 100mg/L.With vibration in the constant temperature oscillation case being placed on 25 DEG C 12 hours, it is made to reach adsorption equilibrium.Finally adopt visible-ultraviolet specrophotometer to survey its absorbance, to be converted to obtain its concentration by methylene blue graticule.The adsorbance of macadamia shell adsorbent is calculated according to (1) formula:
In formula, Q: macadamia shell adsorbent is to the adsorbance (mg/g) of methylene blue; C
0: initial methylene blue concentration (mg/L); C
e: methylene blue concentration (mg/L) after absorption; V: containing methylene blue solution volume (ml); W: the quality (g) adding macadamia shell adsorbent.
Utilize the methylene blue in the macadamia shell adsorbent removal dyeing waste water solution prepared in embodiment 1-10, the adsorption experiment condition of each embodiment is as follows:
The dosage of macadamia shell adsorbent is 0.5g/L, and methylene blue dye liquid waste concentration is 100mg/L, and add the obtained macadamia shell adsorbent of embodiment 1 ~ 10 in waste water after, be placed in 25 DEG C of constant temperature oscillators and vibrate 12h, hunting speed is 180rpm.Upon adsorption reach balance after, take out solution, adopt the water system filter of 0.45 μm to filter, according to formula (1)
obtain the adsorbance of macadamia shell adsorbent, in table 1.
Utilize the methylene blue in the shuck adsorbent and macadamia shell charcoal absorption removal dyeing waste water solution prepared in comparative example 1-2, comparative example's adsorption experiment condition is as follows:
Shuck adsorbent or macadamia shell active carbon dosage are 0.5g/L, methylene blue dye liquid waste concentration is 100mg/L, at room temperature, solution ph is 11, the obtained shuck adsorbent of comparative example 1 ~ 2 or macadamia shell active carbon is added in waste water, vibrate 12h in 25 DEG C of constant temperature oscillators, and hunting speed is 180rpm.Upon adsorption reach balance after, take out solution, adopt the water system filter of 0.45 μm to filter, according to formula (1)
obtain the adsorbance of shuck adsorbent, in table 1.
Table 1:
Here is the adsorption experiment situation of carrying out to methylene blue dye under different condition for the macadamia shell adsorbent of embodiment 7.
The impact of pH:
Take the macadamia shell sorbing material of 0.025g, being added to 50ml concentration 100mg/L is in methylene blue dye solution, adopts hydrochloric acid and sodium hydroxide solution to regulate pH, makes its pH scope between 1.7 ~ 12.Finally adopt the constant temperature oscillation case of 25 DEG C, 180rpm vibration absorption 12h is set.As shown in Figure 1, macadamia shell adsorbent is very large by the impact of the initial pH of solution on the adsorption effect of methylene blue dye.Its adsorbance and clearance increase with the increase of pH value of solution.After pH is greater than 7, its adsorbance is all at more than 135mg/g, and when pH is 11.38, its adsorbance is 200mg/g.
The impact of adsorption time:
Take the macadamia shell sorbing material of 0.025g, being added to 50ml concentration 100mg/L is in methylene blue dye solution.Adopt the constant temperature oscillation case of 25 DEG C, 180rpm vibration absorption 0 ~ 750min is set.As shown in Figure 2, macadamia shell sorbing material increases with the increase of adsorption time the adsorbance of methylene blue dye and clearance, and 0 ~ 50min rate of adsorption is very fast, and 50 ~ 120min rate of adsorption slows down, and substantially reaches adsorption equilibrium after 150min.
The impact of dyestuff initial concentration:
Take the macadamia shell sorbing material of 0.025g, being added to 50ml concentration 25 ~ 200mg/L is in methylene blue dye solution.Adopt the constant temperature oscillation case of 25 DEG C, 180rpm vibration absorption 12h is set.As shown in Figure 3, macadamia shell sorbing material increases with the increase of dyestuff initial concentration the adsorbance of methylene blue dye, and clearance reduces with the increase of dyestuff initial concentration, the change of 25 ~ 50mg/L adsorbance slowly, the change of 50 ~ 100mg/L adsorbance is accelerated, and the change of 100mg/L adsorbance remains unchanged substantially.
As can be seen from Figure 4 and Figure 5, in Fig. 4, macadamia shell adsorbent is with internal voids, and in the Fig. 5 after having adsorbed methylene blue, the surface of macadamia shell adsorbent is with adsorbate.
Above-mentioned embodiment is the present invention's preferably embodiment; but embodiments of the present invention are not limited by the examples; other are any do not deviate from Spirit Essence of the present invention and principle under do change, modification, substitute, combine, simplify; all should be the substitute mode of equivalence, be included within protection scope of the present invention.
Claims (6)
1. a preparation method for macadamia shell adsorbent, is characterized in that, comprises the steps:
Step 1, pre-treatment step: macadamia shell is cleaned, freeze drying and pulverizing obtain macadamia shell powder for subsequent use; Described pre-treatment step is specially: macadamia shell is put into thermostat water bath, adopts in 25 ~ 45 DEG C of deionized waters and soaks 5 ~ 8 days; Remove the remaining pulp be attached to inside macadamia shell, continue to be put in 25 ~ 45 DEG C of deionized waters after the macadamia shell eliminating the remaining pulp in inner side is cleaned and soak 5 ~ 8 days; Macadamia shell is placed in-60 ~-80 DEG C of freeze drier drying and dehydrating 20 ~ 24h, uses pulverizer to pulverize, cross 80 ~ 325 object sieves;
Step 2, adds 100 ~ 200mL deionized water in a certain amount of macadamia shell powder, obtains solidliquid mixture, carry out ultrasonic process to above-mentioned solidliquid mixture; Heat after ultrasonic process, in heating process, in boiling thing, add boiling water; Stop heating, filter, the product after filtering by washed with de-ionized water, then drying and grinding can obtain required macadamia shell adsorbent.
2. the preparation method of macadamia shell adsorbent according to claim 1, it is characterized in that: in step 2, the addition of described macadamia shell powder is: add 100 ~ 200mL deionized water in every gram of macadamia shell powder.
3. the preparation method of macadamia shell adsorbent according to claim 1, it is characterized in that: in step 2, the power of described ultrasonic process is 30 ~ 50W, and ultrasonic time is 20 ~ 40min.
4. the preparation method of macadamia shell adsorbent according to claim 1, is characterized in that: in step 2, is placed on electric furnace by solidliquid mixture and boils 60 ~ 240min after ultrasonic process.
5. the preparation method of macadamia shell adsorbent according to claim 1, it is characterized in that: in step 2, described baking temperature is 60 DEG C ~ 105 DEG C.
6. the preparation method of macadamia shell adsorbent according to claim 2, is characterized in that: after pulverizer pulverizes and sieves, the particle diameter of macadamia shell powder is 0.18 ~ 0.045mm.
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| CN104341047A (en) * | 2014-11-28 | 2015-02-11 | 张芳 | Scale remover and method for removing scale |
| CN105080499A (en) * | 2015-05-18 | 2015-11-25 | 江苏大学 | Methylene blue dye adsorbent and preparation and application method thereof |
| CN105126771A (en) * | 2015-07-31 | 2015-12-09 | 山西昌圆农副土特产品有限公司 | Processing technology of walnut shell filtering material |
| CN111346613A (en) * | 2018-12-21 | 2020-06-30 | 中国石油化工股份有限公司 | Dye wastewater adsorbent and preparation method thereof |
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| CN103381357A (en) * | 2013-07-30 | 2013-11-06 | 河海大学 | Preparation method for modified walnut shell cation adsorbent |
| CN103464111A (en) * | 2013-08-22 | 2013-12-25 | 河海大学 | Cetyl trimethyl ammonium bromide modified walnut shell absorbent, and preparation method and application thereof |
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