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Soil heavy metal adsorbent and preparation method thereof

A heavy metal and adsorbent technology, applied in chemical instruments and methods, restoration of polluted soil, and other chemical processes, etc., can solve the problems of long repair time, small area of ​​use, soil pollution, etc., to reduce harmful bacteria, The effect of preventing soil compaction and improving soil

Inactive Publication Date: 2018-02-16
河南永泽环境科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] With the development of industry and the modernization of agricultural production, the pollution of heavy metal pollution to the soil has become a problem that cannot be ignored. The existing remediation of heavy metal pollution includes physical remediation, biological remediation, chemical remediation, etc.; Measures such as surface soil, although physical restoration is relatively thorough, but the area used is small and the operation is complicated; bioremediation is to reduce the content of heavy metals entering the plant by controlling the moisture status and redox potential in agricultural soil, and bioremediation also has adsorption capacity through planting. Phytoremediation of soil with heavy metal effects, although bioremediation is simple to operate, it takes a long time to repair; chemical remediation is to use additives, adsorbents and other agents to reduce the transfer ability of heavy metals between soil and crops to achieve the purpose of remediation of soil , although it is efficient, it will pollute the soil, so the existing technology needs further improvement

Method used

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  • Soil heavy metal adsorbent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] A soil heavy metal adsorbent, which is composed of the following raw materials in parts by weight: 20 parts of peat, 15 parts of sandstone soil samples, 10 parts of modified attapulgite, 5 parts of sawdust, 6 parts of wheat bran, 3 parts of urea, chitosan 3 parts of sugar, 2 parts of alkali lignin, 40 parts of deionized water.

[0016] Described modified attapulgite is made by following method:

[0017] Dry 12g of ATP at 105°C for 2h, add the dried ATP into 100ml of toluene, stir until uniform, then heat to 60°C, then add 10ml of MPS, stir at constant temperature for 4h, then filter through a vacuum filter, After washing and solid-liquid separation, dry at 105°C for 2 hours to obtain MPS attapulgite, the MPS is methacryloxypropyltrimethoxysilane, grind MPS attapulgite to 200 mesh, take 2g of attapulgite after grinding Add MPS attapulgite in 100ml toluene and stir evenly, then add 0.5g acrylic acid and azobisisobutyronitrile successively, the quality of described azobis...

Embodiment 2

[0024] A soil heavy metal adsorbent, which is composed of the following raw materials in parts by weight: 30 parts of peat, 22 parts of sandstone soil samples, 15 parts of modified attapulgite, 7 parts of sawdust, 8 parts of wheat bran, 4 parts of urea, chitosan 4 parts of sugar, 3 parts of alkali lignin, 65 parts of deionized water.

[0025] Described modified attapulgite is made by following method:

[0026] Dry 12.5g of ATP at 106°C for 2.5h, add the dried ATP into 102ml of toluene, stir until uniform, then heat to 61°C, then add 11ml of MPS, stir at constant temperature for 4.5h, and then pass through a vacuum filter After filtering, washing, and solid-liquid separation, dry at 107°C for 2.53 hours to obtain MPS attapulgite. The MPS is methacryloxypropyltrimethoxysilane, and the MPS attapulgite is ground to 225 mesh. Take 2.5g of ground MPS attapulgite and add it to 102ml of toluene and stir evenly, then add 0.6g of acrylic acid and azobisisobutyronitrile in sequence, the...

Embodiment 3

[0033] A soil heavy metal adsorbent, which is composed of the following raw materials in parts by weight: 40 parts of peat, 30 parts of sandstone soil samples, 20 parts of modified attapulgite, 8 parts of sawdust, 10 parts of wheat bran, 5 parts of urea, chitosan 5 parts of sugar, 4 parts of alkali lignin, 90 parts of deionized water.

[0034] Described modified attapulgite is made by following method:

[0035] Dry 13g of ATP at 108°C for 3h, add the dried ATP into 105ml of toluene, stir until uniform, then heat to 62°C, then add 12ml of MPS, stir at constant temperature for 5h, then filter through a vacuum filter, After washing and solid-liquid separation, dry at 110°C for 3 hours to obtain MPS attapulgite. The MPS is methacryloxypropyltrimethoxysilane. Grind the MPS attapulgite to 250 mesh, take 3g of attapulgite after grinding Add MPS attapulgite in 105ml toluene and stir evenly, then add 0.7g acrylic acid and azobisisobutyronitrile successively, the quality of described a...

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Abstract

The invention belongs to the technical field of soil heavy metal adsorbents, and particularly relates to a soil heavy metal adsorbent and a preparation method thereof. The soil heavy metal adsorbent is prepared from the following raw materials in parts by weight: 20-40 parts of peat, 15-30 parts of feldspathic sandstone soil samples, 10-20 parts of modified attapulgite, 5-8 parts of sawdust, 6-10parts of wheat bran, 3-5 parts of urea, 3-5 parts of chitosan, 2-4 parts of alkali lignin and 40-90 parts of deionized water. The soil heavy metal adsorbent is fast, efficient and pollution-free.

Description

technical field [0001] The invention belongs to the technical field of soil heavy metal adsorbents, in particular to a soil heavy metal adsorbent and a preparation method thereof. Background technique [0002] With the development of industry and the modernization of agricultural production, the pollution of heavy metal pollution to the soil has become a problem that cannot be ignored. The existing remediation of heavy metal pollution includes physical remediation, biological remediation, chemical remediation, etc.; Measures such as surface soil, although physical restoration is relatively thorough, but the area used is small and the operation is complicated; bioremediation is to reduce the content of heavy metals entering the plant by controlling the moisture status and redox potential in agricultural soil, and bioremediation also has adsorption capacity through planting. Phytoremediation of soil with heavy metal effects, although bioremediation is simple to operate, it tak...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24B01J20/30B09C1/00
Inventor 张琦朱丽莎张明慧
Owner 河南永泽环境科技有限公司
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