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Soil remediation agent used for heavy metal pollution and preparation method thereof

A soil remediation agent and a technology of heavy metals, applied in the field of soil remediation, can solve the problems of limited use of soil and the disappearance of soil value, etc., and achieve the effect of good removal effect, wide sources and broad application prospects

Active Publication Date: 2018-06-22
湛江市凯林技术服务有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing stabilizers used for the treatment of heavy metal-contaminated soil are mostly hydraulic materials such as cement, lime, and gypsum. After the restoration agent containing cement components is added to the soil, it will cause the soil to harden after restoration and use after expansion. The original value of the soil has completely disappeared, and the practical use of the restored soil is very limited

Method used

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  • Soil remediation agent used for heavy metal pollution and preparation method thereof
  • Soil remediation agent used for heavy metal pollution and preparation method thereof

Examples

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Effect test

Embodiment 1

[0019] A soil remediation agent for heavy metal pollution, comprising the following raw materials in parts by weight: 45 parts of clay minerals, 24 parts of straw, 10 parts of chitosan, 5 parts of alfalfa, 6 parts of polydimethyldiallylammonium chloride , 8 parts of water-soluble polyvinyl alcohol, 1.5 parts of guar gum, 4 parts of sodium carbonate, 5 parts of metal oxide and 2 parts of sodium humate, clay minerals include attapulgite and a mixture of montmorillonite and kaolin. The metal oxide includes a mixture of magnesium oxide, sodium oxide and potassium oxide, and the straw is sugarcane straw.

[0020] The preparation method of the soil remediation agent for heavy metal pollution, the specific steps are as follows:

[0021] Step 1, mixing sodium carbonate with straw and heating at 480 degrees Celsius in isolation from the air, naturally cooling to normal temperature and crushing to 160 mesh to obtain the first mixture;

[0022] Step 2, the alfalfa is crushed, then extra...

Embodiment 2

[0027] A soil remediation agent for heavy metal pollution, comprising the following raw materials in parts by weight: 52 parts of clay minerals, 28 parts of straw, 11.5 parts of chitosan, 6 parts of alfalfa, 7.5 parts of polydimethyldiallylammonium chloride , 11 parts of water-soluble polyvinyl alcohol, 2 parts of guar gum, 4.8 parts of sodium carbonate, 7.5 parts of metal oxides and 3 parts of sodium humate, clay minerals include a mixture of sepiolite, palygorskite and illite. The particle diameter of the clay mineral is 0.12mm.

[0028] The preparation method of the soil remediation agent for heavy metal pollution, the specific steps are as follows:

[0029] Step 1, mixing sodium carbonate with straw and heating at 450 degrees Celsius in isolation from the air, naturally cooling to normal temperature and crushing to 180 mesh to obtain the first mixture;

[0030] Step 2, crush the alfalfa, then extract it with 0.75mol / L hydrochloric acid solution for 88 minutes, the mass ra...

Embodiment 3

[0035] A soil remediation agent for heavy metal pollution, comprising the following raw materials in parts by weight: 61 parts of clay minerals, 30 parts of straw, 13 parts of chitosan, 7.5 parts of alfalfa, and 8 parts of polydimethyldiallylammonium chloride , 14 parts of water-soluble polyvinyl alcohol, 2.5 parts of guar gum, 5.5 parts of sodium carbonate, 9 parts of metal oxides and 4.2 parts of sodium humate, clay minerals include palygorskite, illite, montmorillonite and kaolin mixture. The particle diameter of the clay mineral is 0.08mm.

[0036] The preparation method of the soil remediation agent for heavy metal pollution, the specific steps are as follows:

[0037] Step 1, mixing sodium carbonate with straw and heating at 485 degrees Celsius in isolation from air, naturally cooling to normal temperature and crushing to 200 mesh to obtain the first mixture;

[0038] Step 2, the alfalfa is crushed, then extracted with 0.75mol / L hydrochloric acid solution for 88 minutes...

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Abstract

The invention discloses a soil remediation agent used for heavy metal pollution and a preparation method thereof. The agent is prepared from, by weight, 45-64 parts of clay mineral, 24-33 parts of straw, 10-14 parts of chitosan, 5-8 parts of alfalfa, 6-9 parts of poly-diallyldimethylammonium chloride, 8-15 parts of water-soluble polyvinyl alcohol, 1.5-3 parts of guar gum, 4-6 parts of sodium carbonate, 5-10 parts of metal oxide and 2-5 parts of sodium humate. The sources of raw materials are diversified, and under the synergistic effect of each raw material, a finished product prepared according to the method can achieve a great function of removing mercury, chrome, lead and other heavy metal ions in the soil through flocculation, adsorption and other means without causing soil hardening and has a wide application prospect.

Description

technical field [0001] The invention relates to the field of soil restoration, in particular to a soil restoration agent for heavy metal pollution. Background technique [0002] With the upgrading of industrial structure and the adjustment of urban layout, large and medium-sized cities across the country are facing the closure and relocation of a large number of polluting enterprises, resulting in a large number of leftover and abandoned industrial polluted sites in the city, among which heavy metal polluted soil is a common type of industrial polluted site Types of. Most of these polluted sites face changes in land use due to commercial development. Due to the long-term, potential and irreversible harm of heavy metals to animals, plants and human bodies, corresponding restoration should be carried out before the contaminated soil is reused to ensure the environment of the site and the safety of residents. healthy. [0003] Stabilization technology is a relatively mature a...

Claims

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Application Information

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IPC IPC(8): C09K17/40
CPCC09K17/40
Inventor 丰桢敏
Owner 湛江市凯林技术服务有限公司
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