CN103433004A - Method for preparing bio-adsorbent by taking rice bran as raw material - Google Patents
Method for preparing bio-adsorbent by taking rice bran as raw material Download PDFInfo
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- CN103433004A CN103433004A CN2013104190138A CN201310419013A CN103433004A CN 103433004 A CN103433004 A CN 103433004A CN 2013104190138 A CN2013104190138 A CN 2013104190138A CN 201310419013 A CN201310419013 A CN 201310419013A CN 103433004 A CN103433004 A CN 103433004A
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Abstract
The invention discloses a method for preparing a bio-adsorbent by taking rice bran as a raw material. The method comprises the following steps: pre-treating original rice bran and immersing the pretreated rice bran by using an NaOH alkaline solution; washing filtering dreg until the filtering dreg is close to be neutral; after drying at a constant temperature, carrying out oxidization treatment by using a potassium permanganate solution; and carrying out a plurality of times of washing, filtering and constant-temperature drying on the obtained material to obtain the product. The raw materials are agricultural byproducts and are cheap and easily available; chemical agents for modifying the raw materials are common medicines; the operation steps are simple and feasible; a few of sets of equipment are needed, the investment is small and the process is simple; industrial production is easy to realize; the obtained product has good adsorption performance, the environmental risks caused by shell type organic agricultural byproducts are reduced effectively and the resource re-utilization of the agricultural byproducts is realized.
Description
Technical field
The present invention relates to a kind ofly take rice bran and prepare the method for biological adsorption agent as raw material, specifically a kind ofly take rice bran and carry out the method for a kind of high-quality and efficient biological adsorption agent of the combined modified preparation of pretreatment, alkali treatment and oxidation processes as raw material, belong to the recycling agricultural by-products, for this technical field of Adsorption Heavy Metals in Waters.
Background technology
Heavy Metals In Environment and harm thereof have become one of global problem.Heavy metal cadmium toxicity is large, distribution is wide and human body and animals and plants health are had to serious harm, and cadmium just can produce toxicity to the animals and plants vital tissues in the low concentration situation.Cadmium wastewater is mainly from industries such as mining and metallurgy process, battery production, process hides, plating, film and automobile makings.In recent years, the water body of China and heavy metal-polluted soil problem are more outstanding, and the cadmium rice crisis that some areas occur progressively becomes the focus of social concerns, therefore, how effectively to prevent from being subject to showing great attention to of Study on Environmental Protection person with restoring cadmium polluted.Traditional cadmium wastewater processing method mainly contains ion-exchange, chemical precipitation method, electrolysis, coacervation, membrane separation process and oxidation-reduction method etc., and these method ubiquity poor processing effect, the cost cost is high and easily cause the shortcoming such as secondary pollution.Therefore, find a kind of new method new material of effective processing cadmium wastewater, very important for the sustainable health development of ecological environment.
Rice bran is a kind of byproduct in agricultural production process, and at present main application is also field etc. of animal feed, burning disposal, compost, and added value of product is lower, and some utilizes the mode can be to environment as burning disposal.It is raw material that the present invention adopts rice bran, the steps such as pretreatment, NaOH alkali treatment, potassium permanganate oxidation processing such as process pulverizes and sieves make the refined biometric adsorbent, provide a kind of with low cost, superior performance, the agricultural by product that utilizes that added value is high prepares the method for modification biological adsorbent.
Summary of the invention
Main purpose of the present invention is the deficiency existed for prior art, provides the agricultural by product rice bran that utilizes that a kind of Adsorption of Heavy Metals ability is stronger to prepare the method for biological adsorption agent for raw material.
The technical scheme that the present invention proposes is that a kind of agricultural by product rice bran that utilizes prepares the method for biological adsorption agent for raw material.The method be original rice bran after pretreatment, utilize the NaOH aqueous slkali soaking to process, filter residue approaches neutrality through being washed to, after freeze-day with constant temperature, with liquor potassic permanganate, it is carried out to oxidation processes again, resulting materials obtains described product through repeatedly washing, after filtration, constant temperature drying.
Technical scheme of the present invention is:
A kind ofly take rice bran as raw material prepares the method for biological adsorption agent, specifically comprise the following steps:
(1) pretreatment: adopt the agricultural by-products rice bran, original material is directly taken from rice processing factory, first manually remove obvious impurity, after utilizing successively again running water, distilled water and deionized water repeatedly to clean, under 60 ℃ of constant temperatures, dry to constant weight, then pulverize and sieve, retain the sample between the 40-60 order;
(2) alkali treatment: take the material that step (1) makes, according to solid-to-liquid ratio 1g:10ml, add the NaOH solution that mass fraction is 2wt%-8wt%, soak at normal temperatures after shaking up 24 hours, shake up once at interval of vibration in 2 hours;
(3) materials'use vacuum filtration in step (2) is carried out to Separation of Solid and Liquid, use deionized water repeatedly to rinse the material that NaOH processes, until pH approaches neutrality, the gained filter residue is dried to constant weight under 60 ℃ of constant temperatures;
(4) oxidation processes: taking the alkali treatment filter residue of gained in step (3), is that 1:10～1:20 adds liquor potassic permanganate according to the solid-liquid mass ratio, after shaking up, soaks and carries out oxidation processes at normal temperatures, at interval of vibration in 1 hour, shakes up once;
(5) the materials'use vacuum filtration obtained in step (4) is carried out to Separation of Solid and Liquid, use deionized water repeatedly to rinse the material after potassium permanganate is processed, the gained filter residue is dried to constant weight under 60 ℃ of constant temperatures, obtain target product.
Described method, described liquor potassic permanganate concentration is controlled at 0.5wt%-2wt%.
Described method, it is 4～24 hours that described potassium permanganate oxidation is processed soak time.
The present invention compared with prior art, advantage is: selected raw material agricultural by product, and cheap and easy to get, to the required chemical reagent of raw-material modification, be common drug, simple operating steps is easily gone, equipment needed thereby platform cover is few, invests littlely, and technique is simple, easily realize suitability for industrialized production, the products obtained therefrom absorption property is superior, and effectively reduces the environmental risk of shell class organic agriculture byproduct, belongs to agricultural by product resource recycling.
The accompanying drawing explanation
Fig. 1 is that original rice bran material outer wall surface is amplified the scanning electron microscope (SEM) photograph of 100,000 times;
Fig. 2 is that in the embodiment of the present invention 3, gained biological adsorption agent outer wall surface is amplified the scanning electron microscope (SEM) photograph of 100,000 times;
Fig. 3 is that original rice bran material outer wall surface is amplified the scanning electron microscope (SEM) photograph of 50,000 times;
Fig. 4 is that in the embodiment of the present invention 3, gained biological adsorption agent outer wall surface is amplified the scanning electron microscope (SEM) photograph of 50,000 times;
Fig. 5 be in the embodiment of the present invention 3 the gained biological adsorption agent under different initial concentrations to the adsorption capacity figure of cadmium;
Fig. 6 be in the embodiment of the present invention 3 the gained biological adsorption agent at different disposal adsorption capacity figure to cadmium under the time;
Fig. 7 be in the embodiment of the present invention 3 the gained biological adsorption agent under the initial pH of difference to the adsorption capacity figure of cadmium;
Fig. 8 be in the embodiment of the present invention 2 the gained biological adsorption agent under different initial concentrations to the adsorption isotherm model simulation drawing of cadmium;
Fig. 9 be in the embodiment of the present invention 3 the gained biological adsorption agent under different initial concentrations to the adsorption isotherm model simulation drawing of cadmium;
Figure 10 be in the embodiment of the present invention 4 the gained biological adsorption agent under different initial concentrations to the adsorption isotherm model simulation drawing of cadmium;
The specific embodiment
Below in conjunction with specific embodiment, the present invention is described in detail.
A kind of method of utilizing rice bran to prepare biological adsorption agent, at first choosing the agricultural by product rice bran is raw material, its concrete preparation process is followed successively by:
1, pretreatment: rice bran is taken from rural area rice processing factory, advanced pedestrian's work screening, the a small amount of large particle diameter impurity that removal contains, utilize running water repeatedly to rinse in rice bran, by distilled water, deionized water, repeatedly clean successively again, dry to constant weight under 60 ℃ of constant temperatures, then pulverize and sieve, retain the sample between the 40-60 order.
2, alkali treatment: take the original rice bran 100g of step 1 preparation, be placed in the 1000mL triangular flask, adding the NaOH solution 1000ml(solid-to-liquid ratio that mass concentration is 2% is 1:10), after shaking up, soak at normal temperatures 24 hours, at interval of vibration in 2 hours, shake up once.
By the rice bran vacuum filtration after alkali treatment, and with deionized water repeatedly rinse to the pH value, approach neutral, by filter residue at 60 ℃ of lower constant temperature dryings to constant weight.
3, oxidation processes: take the dried alkali treatment filter residue of gained 50g, be placed in the 1000ml triangular flask, add the liquor potassic permanganate 500ml that mass concentration is 0.5%, solid-to-liquid ratio is 1:10, soak at normal temperatures after shaking up 12 hours, shake up once at interval of vibration in 1 hour.
By the rice bran vacuum filtration after oxidation processes, and repeatedly rinse by deionized water, by filter residue at 60 ℃ of lower constant temperature dryings to constant weight, obtain modification biological adsorbent product.
According to Staticadsorption experiment, simulation cadmium wastewater concentration is controlled at 50-200mg/L, and the pH value is controlled at 4.0-8.0, the adsorbent dosage is 2g/L, adsorption time is 4h, until reaction reaches adsorption equilibrium, the rice bran modification biological adsorbent that the present invention produces can reach 26.60mg/g to the adsorbance of cadmium.
A kind of method of utilizing rice bran to prepare biological adsorption agent, at first choosing the agricultural by product rice bran is raw material, its concrete preparation process is followed successively by:
1, pretreatment: rice bran is taken from rural area rice processing factory, advanced pedestrian's work screening, the a small amount of large particle diameter impurity that removal contains, utilize running water repeatedly to rinse in rice bran, by distilled water, deionized water, repeatedly clean successively again, dry to constant weight under 60 ℃ of constant temperatures, then pulverize and sieve, retain the sample between the 40-60 order.
2, alkali treatment: take the original rice bran 100g of step 1 preparation, be placed in the 1000mL triangular flask, adding the NaOH solution 1000ml(solid-to-liquid ratio that mass concentration is 8% is 1:10), after shaking up, soak at normal temperatures 24 hours, at interval of vibration in 2 hours, shake up once.
By the rice bran vacuum filtration after alkali treatment, and with deionized water repeatedly rinse to the pH value, approach neutral, by filter residue at 60 ℃ of lower constant temperature dryings to constant weight.
3, oxidation processes: take the dried alkali treatment filter residue of gained 50g, be placed in the 1000ml triangular flask, add the liquor potassic permanganate 1000ml that mass concentration is 2%, solid-to-liquid ratio is 1:20, soak at normal temperatures after shaking up 4 hours, shake up once at interval of vibration in 1 hour.
By the rice bran vacuum filtration after oxidation processes, and repeatedly rinse by deionized water, by filter residue at 60 ℃ of lower constant temperature dryings to constant weight, obtain modification biological adsorbent product.
According to Staticadsorption experiment, simulation cadmium wastewater concentration is controlled at 50-200mg/L, and the pH value is controlled at 4.0-8.0, the adsorbent dosage is 2g/L, adsorption time is 4h, until reaction reaches adsorption equilibrium, the rice bran modification biological adsorbent that the present invention produces can reach 57.14mg/g to the adsorbance of cadmium.
A kind of method of utilizing rice bran to prepare biological adsorption agent, at first choosing the agricultural by product rice bran is raw material, its concrete preparation process is followed successively by:
1, pretreatment: rice bran is taken from rural area rice processing factory, advanced pedestrian's work screening, the a small amount of large particle diameter impurity that removal contains, utilize running water repeatedly to rinse in rice bran, by distilled water, deionized water, repeatedly clean successively again, dry to constant weight under 60 ℃ of constant temperatures, then pulverize and sieve, retain the sample between the 40-60 order.
2, alkali treatment: take the original rice bran 100g of step 1 preparation, be placed in the 1000mL triangular flask, adding the NaOH solution 1000ml(solid-to-liquid ratio that mass concentration is 2% is 1:10), after shaking up, soak at normal temperatures 24 hours, at interval of vibration in 2 hours, shake up once.
By the rice bran vacuum filtration after alkali treatment, and with deionized water repeatedly rinse to the pH value, approach neutral, by filter residue at 60 ℃ of lower constant temperature dryings to constant weight.
3, oxidation processes: take the dried alkali treatment filter residue of gained 50g, be placed in the 1000ml triangular flask, add the liquor potassic permanganate 500ml that mass concentration is 2%, solid-to-liquid ratio is 1:10, soak at normal temperatures after shaking up 4 hours, shake up once at interval of vibration in 1 hour.
By the rice bran vacuum filtration after oxidation processes, and repeatedly rinse by deionized water, by filter residue at 60 ℃ of lower constant temperature dryings to constant weight, obtain modification biological adsorbent product.
According to Staticadsorption experiment, simulation cadmium wastewater concentration is controlled at 50-200mg/L, and the pH value is controlled at 4.0-8.0, the adsorbent dosage is 2g/L, adsorption time is 4h, until reaction reaches adsorption equilibrium, the rice bran modification biological adsorbent that the present invention produces can reach 32.05mg/g to the adsorbance of cadmium.
A kind of method of utilizing rice bran to prepare biological adsorption agent, at first choosing the agricultural by product rice bran is raw material, its concrete preparation process is followed successively by:
1, pretreatment: rice bran is taken from rural area rice processing factory, advanced pedestrian's work screening, the a small amount of large particle diameter impurity that removal contains, utilize running water repeatedly to rinse in rice bran, by distilled water, deionized water, repeatedly clean successively again, dry to constant weight under 60 ℃ of constant temperatures, then pulverize and sieve, retain the sample between the 40-60 order.
2, alkali treatment: take the original rice bran 100g of step 1 preparation, be placed in the 1000mL triangular flask, adding the NaOH solution 1000ml(solid-to-liquid ratio that mass concentration is 4% is 1:10), after shaking up, soak at normal temperatures 24 hours, at interval of vibration in 2 hours, shake up once.
By the rice bran vacuum filtration after alkali treatment, and with deionized water repeatedly rinse to the pH value, approach neutral, by filter residue at 60 ℃ of lower constant temperature dryings to constant weight.
3, oxidation processes: take the dried alkali treatment filter residue of gained 50g, be placed in the 1000ml triangular flask, add the liquor potassic permanganate 1000ml that mass concentration is 2%, solid-to-liquid ratio is 1:20, soak at normal temperatures after shaking up 24 hours, shake up once at interval of vibration in 1 hour.
By the rice bran vacuum filtration after oxidation processes, and repeatedly rinse by deionized water, by filter residue at 60 ℃ of lower constant temperature dryings to constant weight, obtain modification biological adsorbent product.
According to Staticadsorption experiment, simulation cadmium wastewater concentration is controlled at 50-200mg/L, and the pH value is controlled at 4.0-8.0, the adsorbent dosage is 2g/L, adsorption time is 4h, until reaction reaches adsorption equilibrium, the rice bran modification biological adsorbent that the present invention produces can reach 52.63mg/g to the adsorbance of cadmium.
Should be understood that, for those of ordinary skills, can be improved according to the above description or convert, and all these improvement and conversion all should belong to the protection domain of claims of the present invention.
Claims (3)
1. take rice bran as raw material prepares the method for biological adsorption agent for one kind, specifically comprise the following steps:
(1) pretreatment: adopt the agricultural by-products rice bran, original material is directly taken from rice processing factory, first manually remove obvious impurity, after utilizing successively again running water, distilled water and deionized water repeatedly to clean, under 60 ℃ of constant temperatures, dry to constant weight, then pulverize and sieve, retain the sample between the 40-60 order;
(2) alkali treatment: take the material that step (1) makes, according to solid-to-liquid ratio 1g:10ml, add the NaOH solution that mass fraction is 2wt%-8wt%, soak at normal temperatures after shaking up 24 hours, shake up once at interval of vibration in 2 hours;
(3) materials'use vacuum filtration in step (2) is carried out to Separation of Solid and Liquid, use deionized water repeatedly to rinse the material that NaOH processes, until pH approaches neutrality, the gained filter residue is dried to constant weight under 60 ℃ of constant temperatures;
(4) oxidation processes: taking the alkali treatment filter residue of gained in step (3), is that 1:10～1:20 adds liquor potassic permanganate according to the solid-liquid mass ratio, after shaking up, soaks and carries out oxidation processes at normal temperatures, at interval of vibration in 1 hour, shakes up once;
(5) the materials'use vacuum filtration obtained in step (4) is carried out to Separation of Solid and Liquid, use deionized water repeatedly to rinse the material after potassium permanganate is processed, the gained filter residue is dried to constant weight under 60 ℃ of constant temperatures, obtain target product.
2. method according to claim 1, it is characterized in that: described liquor potassic permanganate concentration is controlled at 0.5wt%-2wt%.
3. method according to claim 1 is characterized in that: it is 4～24 hours that described potassium permanganate oxidation is processed soak time.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105344337A (en) * | 2015-12-08 | 2016-02-24 | 无锡拓能自动化科技有限公司 | Preparation method for heavy metal wastewater adsorbent |
| CN105688833A (en) * | 2016-03-15 | 2016-06-22 | 东华大学 | Biomass adsorbent and method for treating cadmium-containing wastewater by applying same |
| CN107837793A (en) * | 2017-12-25 | 2018-03-27 | 郑州源冉生物技术有限公司 | A kind of sewage treating material based on system chaff and its preparation method and application |
| CN109211630A (en) * | 2018-09-14 | 2019-01-15 | 徐州工程学院 | A kind of rapid detection method of content of heavy metal in foods |
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| KR20020004477A (en) * | 2000-07-05 | 2002-01-16 | 구영환 | Microbial adsorbent matrix and food-waste treatment machine |
| CN101244822A (en) * | 2008-02-22 | 2008-08-20 | 浙江工业大学 | Foods level active carbon produced with rough rice shell as raw material and producing method thereof |
| CN101264437A (en) * | 2008-05-09 | 2008-09-17 | 温州市粮油科学研究所 | Rice hull adsorbent for absorbing dye and manufacturing method thereof |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20020004477A (en) * | 2000-07-05 | 2002-01-16 | 구영환 | Microbial adsorbent matrix and food-waste treatment machine |
| CN101244822A (en) * | 2008-02-22 | 2008-08-20 | 浙江工业大学 | Foods level active carbon produced with rough rice shell as raw material and producing method thereof |
| CN101264437A (en) * | 2008-05-09 | 2008-09-17 | 温州市粮油科学研究所 | Rice hull adsorbent for absorbing dye and manufacturing method thereof |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105344337A (en) * | 2015-12-08 | 2016-02-24 | 无锡拓能自动化科技有限公司 | Preparation method for heavy metal wastewater adsorbent |
| CN105688833A (en) * | 2016-03-15 | 2016-06-22 | 东华大学 | Biomass adsorbent and method for treating cadmium-containing wastewater by applying same |
| CN107837793A (en) * | 2017-12-25 | 2018-03-27 | 郑州源冉生物技术有限公司 | A kind of sewage treating material based on system chaff and its preparation method and application |
| CN109211630A (en) * | 2018-09-14 | 2019-01-15 | 徐州工程学院 | A kind of rapid detection method of content of heavy metal in foods |
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Inventor after: Deng Shihuai Inventor after: Li Yuanwei Inventor after: Zhang Yanzong Inventor after: Bai Lin Inventor after: Liang Dongxu Inventor after: Yang Xinyao Inventor after: Luo Chunyan Inventor after: Wang Chengming Inventor after: Xiao Hong Inventor after: Wang Lilin Inventor after: Shen Fei Inventor after: Li Li Inventor before: Deng Shihuai Inventor before: Li Yuanwei Inventor before: Zhang Yanzong Inventor before: Bai Lin Inventor before: Liang Dongxu Inventor before: Yang Xinyao Inventor before: Luo Chunyan Inventor before: Wang Chengming Inventor before: Xiao Hong Inventor before: Wang Lilin Inventor before: Shen Fei Inventor before: Li Li |
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