CN101716496A - Method for surface modification processing on biomass environmental adsorbing material by KOH - Google Patents
Method for surface modification processing on biomass environmental adsorbing material by KOH Download PDFInfo
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- CN101716496A CN101716496A CN200910234387A CN200910234387A CN101716496A CN 101716496 A CN101716496 A CN 101716496A CN 200910234387 A CN200910234387 A CN 200910234387A CN 200910234387 A CN200910234387 A CN 200910234387A CN 101716496 A CN101716496 A CN 101716496A
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Abstract
The invention discloses a method for surface modification processing on a biomass environmental adsorbing material by KOH, which belongs to the technical field of utilization of agricultural solid waste. The method comprises the following steps of: rinsing a soybean straw by deionized water and then drying at 105 DEG C+/-5 DEG C for three hours; pulverizing and screening by a sieve in 60 meshes; then placing the product into a muffle furnace to carry out anaerobic pyrolysis carbonization at 700 DEG C for eight hours; soaking by using a KOH solution with the concentration of 1mol/L for six hours to carry out surface modification; then embathing for many times by using deionized water till the pH of washing wastewater is between 6.5 and 7; finally carrying out drying processing at 105 DEG C+/-5 DEG C for six hours and screening by the sieve in 60 meshes. The method is simple, convenient, economic, practical and environmental-friendly and meets the requirements for clean production and circular economy development; and the prepared soybean straw biomass environmental adsorbing material has good performance index, high adsorbing ability and favorable industrial application prospect.
Description
Technical field
The present invention relates to a kind of method with KOH surface modification treatment biomass environment adsorbing materials, being specifically related to a kind of KOH of utilization surface modification treatment is the method for the high-performance biomass environmental absorbing material of feedstock production with the soybean stalks.Belong to agricultural solid residue and utilize technical field.
Background technology
In recent years, along with China's rapid economy development, the energy resource structure generation significant change in rural area, crop material is replaced by fuel such as electric energy or liquefied gas gradually as traditional energy fuel, agricultural crop straw is banked up in a large number, or on-site incineration, the crop straw burning phenomenon is particularly outstanding in the developed area.This not only causes the wasting of resources, produces a large amount of smog and CO, CO simultaneously
2Deng material, destroy agricultural land soil structure and ecological environment, industrial and agricultural production and traffic safety are caused very big threat.The concern that current, the agricultural crop straw charring process is low because of its input, high efficiency, characteristics such as have wide range of applications are subjected to more and more researchers.Some researchs point out that the biomass environment materials such as active carbon that organic-biological matter is handled the back generation through charing have the good adsorption performance to pollutant in atmosphere, soil and the water body.
The surface characteristic of biomass environment material is determined by two aspects: preparation method and post-processing technology (mainly being process for modifying surface).Activated carbon modified mainly is by some physics, chemical treatment, changes its pore structure (as pore volume, pore size and distribution etc.); Change acid, the alkalescence of activated carbon surface; Perhaps introducing or remove some functional group at activated carbon surface makes it have certain special absorption property and catalysis characteristics.At present, at the method for activated carbon surface chemical property modification mainly contain oxidation modification, reduction modification, soda acid modification, plasma modification, metal is loaded modified and electrochemical modification etc.
The soda acid modification is because its production process is simple, easily operation, can also alleviate activated carbon variety few, with low content of technology, lack problem such as the high-quality special-purpose activated charcoal of functionalization, thereby receive more and more researchers' concern.Soda acid modifier commonly used at present has HNO
3, H
2O
2, HClO, HCl, H
3PO
4, KOH, ammoniacal liquor etc.Therefore environment adsorbing materials owing to can make high-specific surface area with the KOH surface modification, has become a focus of this area research in recent years.But adopt the KOH modification, producing effects of active carbon is lower.For being the biomass environment adsorbing materials of feedstock production, with KOH how, still lack the correlation technique report both at home and abroad to its effect of carrying out surface modification treatment with the land for growing field crops agricultural crop straw.
Summary of the invention
The present invention is that the biomass environment adsorbing materials of feedstock production is an object to utilize the land for growing field crops agricultural crop straw, at the problem that lacks its surface modifying method at present both at home and abroad, providing that a kind of method is easy, economic, practical, environmental protection, is the method for the high-performance biomass environmental absorbing material of feedstock production with the soybean stalks with the KOH surface modification treatment.This method may further comprise the steps:
1, soybean stalks is descended oven dry 3h at 105 ℃ ± 5 ℃ after rinsed with deionized water, with its pulverizing and mistake 60 mesh sieves;
2, put into Muffle furnace then and carry out anaerobic pyrolysis carbonization, temperature is 700 ℃, and the pyrolysis charring time is 8h;
3, be that the KOH solution of 1mol/L soaks and to carry out surface modification with concentration again, soak time is 6h;
4, repeatedly embathe with deionized water then, the pH that is washed till washes is between 6.5-7;
5, dry processing 6h down at 105 ℃ ± 5 ℃ at last, cross 60 mesh sieves then, can obtain through the soybean stalks high-performance biomass environmental absorbing material KOH surface modification, high adsorption capacity.
Beneficial effect
The present invention has following advantage
(1) the used raw material of the present invention is a soybean stalks, and wide material sources are easy to get, and belong to the resource of agricultural solid residue, have reduced material cost.
(2) the present invention's KOH surface modification treatment biomass environment adsorbing materials, method is easy, economic, practical, environmental protection, meets the requirement of cleaner production and recycling economy development.
(3) with after the KOH surface modification treatment, prepared soybean stalks biomass environment adsorbing materials good performance indexes, high adsorption capacity have favorable industrial application prospect.
Description of drawings
Accompanying drawing is a process chart of the present invention.
The specific embodiment
The present invention is further illustrated below by example, but it does not influence protection scope of the present invention.
Embodiment 1:
The soybean stalks that to take from Nanjing Suburb is dried 3h down at 105 ℃ ± 5 ℃ after rinsed with deionized water, it is crushed to can passes through 60 mesh sieves; Put into then in the Muffle furnace (model is SX2-25-10, and producer is Taizhou City sky, Jiangsu Province Tai Shiyanyiqichang) and carry out anaerobic pyrolysis carbonization, temperature is 700 ℃, and the pyrolysis charring time is 8h; Be that the KOH solution of 1mol/L soaks and to carry out surface modification with concentration again, soak time is 6h; Repeatedly embathe with deionized water then, the pH that is washed till washes is between 6.5-7; Dry down at 105 ℃ ± 5 ℃ at last and handle 6h, cross 60 mesh sieves, can obtain through the soybean stalks biomass environment adsorbing materials KOH surface modification, high adsorption capacity.According to national standard (GBT12496.10-1999) test, leading indicator---methylene blue adsorption value is than the high 15mg/g of merchandise active carbon.The high-performance biomass environmental absorbing material of this method preparation is put in the aqueous solution that contains the 1mg/L phenanthrene, the solid-to-liquid ratio of the living beings sorbing material and the aqueous solution is respectively: 1g: 3.2L, 1g: 1.6L, 1g: 0.8L, after the adsorption equilibrium, the clearance of aqueous solution China and Philippines reaches 99.61%, 100% and 99.73% respectively; Under the same terms, merchandise active carbon then is 99.68%, 99.81% and 99.07% to the clearance of aqueous solution China and Philippines.
Embodiment 2:
The soybean stalks that to take from Nanjing Suburb is dried 3h down at 105 ℃ ± 5 ℃ after rinsed with deionized water, it is crushed to can passes through 60 mesh sieves; Put into then in the Muffle furnace (model is SX2-25-10, and producer is Taizhou City sky, Jiangsu Province Tai Shiyanyiqichang) and carry out anaerobic pyrolysis carbonization, temperature is 700 ℃, and the pyrolysis charring time is 8h; Be that the KOH solution of 1mol/L soaks and to carry out surface modification with concentration again, soak time is 6h; Repeatedly embathe with deionized water then, the pH that is washed till washes is between 6.5-7; Dry down at 105 ℃ ± 5 ℃ at last and handle 6h, cross 60 mesh sieves, can obtain through the soybean stalks biomass environment adsorbing materials KOH surface modification, high adsorption capacity.The high-performance biomass environmental absorbing material of this method preparation is put in the aqueous solution that contains 10mg/L naphthalene, 3mg/L acenaphthene, 1mg/L phenanthrene.When the solid-to-liquid ratio of the living beings sorbing material and the aqueous solution was 1g:3.2L, after the adsorption equilibrium, naphthalene, acenaphthene, luxuriant and rich with fragrance clearance were respectively 94.85%, 91.64%, 99.82% in the aqueous solution; Under the same terms, merchandise active carbon is 89.71%, 88.61%, 99.57% to the clearance of these pollutants.When the solid-to-liquid ratio of living beings sorbing material and mixed solution is 1g: during 1.6L, after the adsorption equilibrium, naphthalene, acenaphthene, luxuriant and rich with fragrance clearance are respectively 95.58%, 93.14%, 99.94% in the aqueous solution; Under the same terms, merchandise active carbon then is 96.24%, 93.61% phenanthrene 99.84% to the clearance of these pollutants.
Claims (1)
1. method with KOH surface modification treatment biomass environment adsorbing materials may further comprise the steps:
(1) soybean stalks is descended oven dry 3h at 105 ℃ ± 5 ℃ after rinsed with deionized water, with its pulverizing and mistake 60 mesh sieves;
(2) put into Muffle furnace then and carry out anaerobic pyrolysis carbonization, temperature is 700 ℃, and the pyrolysis charring time is 8h;
(3) be that the KOH solution of 1mol/L soaks and to carry out surface modification with concentration again, soak time is 6h;
(4) embathe with deionized water then, the pH that is washed till washes is between 6.5-7;
(5) dry processing 6h down at 105 ℃ ± 5 ℃ at last, cross 60 mesh sieves then, can obtain through the soybean stalks high-performance biomass environmental absorbing material KOH surface modification, high adsorption capacity.
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| CN200910234387A CN101716496A (en) | 2009-11-24 | 2009-11-24 | Method for surface modification processing on biomass environmental adsorbing material by KOH |
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| CN200910234387A CN101716496A (en) | 2009-11-24 | 2009-11-24 | Method for surface modification processing on biomass environmental adsorbing material by KOH |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107583609A (en) * | 2017-10-31 | 2018-01-16 | 成都先进金属材料产业技术研究院有限公司 | A kind of modified mangosteen shell charcoal and the method using vanadium in its reduction water body |
| CN111686687A (en) * | 2020-05-27 | 2020-09-22 | 北京林丰源生态环境规划设计院有限公司 | Preparation method of cattail biochar and method for treating methylene blue in water body by using cattail biochar |
| CN113231036A (en) * | 2021-05-21 | 2021-08-10 | 南京工业大学 | Supported adsorbent for removing ultralow-concentration hydrogen sulfide and preparation method thereof |
-
2009
- 2009-11-24 CN CN200910234387A patent/CN101716496A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107583609A (en) * | 2017-10-31 | 2018-01-16 | 成都先进金属材料产业技术研究院有限公司 | A kind of modified mangosteen shell charcoal and the method using vanadium in its reduction water body |
| CN111686687A (en) * | 2020-05-27 | 2020-09-22 | 北京林丰源生态环境规划设计院有限公司 | Preparation method of cattail biochar and method for treating methylene blue in water body by using cattail biochar |
| CN113231036A (en) * | 2021-05-21 | 2021-08-10 | 南京工业大学 | Supported adsorbent for removing ultralow-concentration hydrogen sulfide and preparation method thereof |
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Open date: 20100602 |