Preparation method of polymer composite material crosslinked double-modified attapulgite and biomass charcoal fillers
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A biochar and cross-linking technology, applied in chemical instruments and methods, fertilizer mixtures, soil conditioning materials, etc., can solve problems such as affecting soil fertility, low remediation efficiency, easy secondary pollution, etc., and achieve high remediation efficiency. Improved yield and quality, significant environmental benefits
Active Publication Date: 2019-05-28
CHINESE ACAD OF ENVIRONMENTAL PLANNING
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[0004] The purpose of the present invention is to solve the defects of low repair efficiency, high cost, easy secondary pollution, and affecting soil fertility commonly found in heavy metal soil and groundwater inorganic agents, organic agents and biological agents, and provides a highly efficient, economically feasible, and easy-to-use Preparation method of cross-linked double-modified attapulgite and biochar filler of polymer compound material
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Embodiment 1
[0023] (1) Mix chitosan into 100mL water at a mass concentration of 0.01g / mL, fully swell for 1h and set aside;
[0024] (2) Mix polyacrylamide, polyethylene oxide, and polyvinyl alcohol into 100mL water at mass concentrations of 0.01g / mL, 0.005g / mL, and 0.01g / mL, respectively, stir and heat to 80°C, then magnetically stir for 30min and set aside;
[0025] (3) Mix ferric nitrate nonahydrate into 100mL water at a mass concentration of 0.05g / mL, stir fully for 2min and set aside;
[0026] (4) Add attapulgite at a mass concentration of 0.05 g / mL to 100 mL of the solution prepared in step (3), stir magnetically for 24 hours, then filter, and dry the filtered solid at 105° C. for 2 hours for use;
[0027] (5) Put the solid dried in step (4) into a tubular resistance furnace for heating, heat up to 300°C and stay for 3 hours, cool down to normal temperature, take it out from the tubular resistance furnace and grind it through a 200-mesh standard sieve and wait use;
[0028] (6) Af...
Embodiment 2
[0039] (1) Chitosan was mixed into 100mL water with a mass concentration of 0.05g / mL, fully swollen for 3 hours and then used;
[0040] (2) Mix polyacrylamide, polyethylene oxide, and polyvinyl alcohol into 100mL water at mass concentrations of 0.04g / mL, 0.02g / mL, and 0.05g / mL, respectively, stir and heat to 80°C, then magnetically stir for 30min and set aside;
[0041] (3) Mix ferric nitrate nonahydrate into 100mL water at a mass concentration of 0.09g / mL, stir well for 2min and set aside;
[0042] (4) Add attapulgite at a mass concentration of 0.10 g / mL to 100 mL of the solution prepared in step (3), stir magnetically for 24 hours and then filter, and dry the filtered solid at 105° C. for 2 hours for use;
[0043] (5) Put the dried solid in step (4) into a tube-type resistance furnace for heating, heat up to 500°C and stay for 3 hours, cool down to room temperature, take it out from the tube-type resistance furnace and grind it through a 200-mesh standard sieve. use;
[00...
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Abstract
The invention discloses a preparation method of polymer composite material crosslinked double-modified attapulgite and biomass charcoal fillers. The preparation method includes the steps that chitosan, polyacrylamide, polyoxyethylene, and polyvinyl alcohol are used as polymer crosslinked precursors, the attapulgite and straw biomass charcoal are used as additional agents, iron nitrate nonahydrateand biochemical fulvic acid are used as modifying agents, and monopotassium phosphate, boric acid, calcium chloride, and glutaraldehyde are used as cross-linking agents. According to the preparation method of the polymer composite material crosslinked double-modified attapulgite and the biomass charcoal filler, prepared products have microporous framework supporting structures, on the premise of maintaining high permeability, high strength and high bacteria resistance, the specific surface area and the number of active groups of the attapulgite and biomass carbon materials are significantly increased, the effect of the fillers on remediation of heavy metal contaminated soil and groundwater is greatly improved, compared with traditional attapulgite adsorption materials, the effect of cadmium removal is increased by nearly 10 times, the effect of lead removal is increased by nearly 5 times, technical support is provided for remediation of the heavy metal contaminated soil and the groundwater in China, and good environmental, economic and social benefits are achieved.
Description
technical field [0001] The invention relates to the technical field of remediation of heavy metal polluted soil and groundwater, in particular to a preparation method of cross-linked double-modified attapulgite and biochar filler of polymer compound materials. Background technique [0002] Heavy metal-contaminated soil usually adopts remediation technologies such as leaching, solidification / stabilization, and cement kiln co-processing, and heavy metal-contaminated groundwater usually adopts remediation technologies such as ex-situ extraction treatment, in-situ reaction zone, and in-situ PRB. Groundwater remediation technology is immature, mainly due to the lack of research and development of heavy metal-contaminated soil and groundwater remediation agents in China. [0003] Domestic heavy metal contaminated soil and groundwater remediation agents are mainly concentrated in inorganic remediation agents (lime, fly ash, zero-valent iron, iron salt, magnesium salt, phosphate, hy...
Claims
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Application Information
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