Repair method of acid contaminated soil

A technology of contaminated soil and remediation method, which is applied in the field of remediation of acid-contaminated soil, which can solve the problems of prolonged soil remediation cycle and low efficiency, and achieve the effect of quickly adjusting the acidity of the soil and reducing the content of heavy metals

Inactive Publication Date: 2019-02-12
广东建诚明德建设管理有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The above scheme has a relatively obvious repair effect, but the aging period is about 2 months, and planting castor and willow requires a long time limit, which makes the whole period of soil restoration longer and the efficiency is lower

Method used

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  • Repair method of acid contaminated soil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Preparation of Weak Alkaline Liquid

[0030] In parts by weight, 5 parts of lime are dissolved in 100 parts of water, and the solution is completed to obtain weakly alkaline lime water, which is ready for use.

[0031] Preparation of medical stone powder

[0032] The preparation mass concentration is 5% CaCl 2 Aqueous solution, spare. Soak medical stone in CaCl 2 In aqueous solution, make CaCl 2 The aqueous solution completely submerged the medical stone, soaked for 4 hours, took out the medical stone, crushed, dried to constant weight at 70°C, passed through a 20-mesh sieve, and took the medical stone powder that could pass through the 20-mesh sieve for later use. .

[0033] Preparation of crab shell powder

[0034] Clean the crab shells, dry the crab shells at 60°C to constant weight, crush the crab shells to obtain crab shell dregs, and then ball mill the crab shell dregs. After 3 hours of ball milling, pass through a 200-mesh sieve, and take the energy that ca...

Embodiment 2

[0040] Preparation of Weak Alkaline Liquid

[0041] In parts by weight, 6 parts of lime are dissolved in 100 parts of water, and the solution is completed to obtain weakly alkaline lime water, which is ready for use.

[0042] Preparation of medical stone powder

[0043] The preparation mass concentration is 5% MgCl 2 Aqueous solution, spare. Soak medical stone in MgCl 2 In aqueous solution, make MgCl 2 The aqueous solution completely submerged the medical stone, soaked for 2 hours, took out the medical stone, crushed, dried to constant weight at 70°C, passed through a 20-mesh sieve, and took the medical stone powder that could pass through the 20-mesh sieve, and set aside .

[0044] Preparation of crab shell powder

[0045] Clean the crab shells, dry the crab shells at 80°C to constant weight, crush the crab shells to obtain crab shell dregs, and then ball mill the crab shell dregs. After ball milling for 4 hours, pass through a 200-mesh sieve, and take the energy that c...

Embodiment 3

[0051] Preparation of Weak Alkaline Liquid

[0052] In parts by weight, 7 parts of lime are dissolved in 100 parts of water, and the solution is completed to obtain weakly alkaline lime water, which is ready for use.

[0053] Preparation of medical stone powder

[0054] The preparation mass concentration is 5% CaCl 2 Aqueous solution, spare. Soak medical stone in CaCl 2 In aqueous solution, make CaCl 2 The aqueous solution completely submerged the medical stone, soaked for 3 hours, took out the medical stone, crushed, dried at 70°C to constant weight, passed through a 20-mesh sieve, and took the medical stone powder that could pass through the 20-mesh sieve for later use. .

[0055] Preparation of crab shell powder

[0056] Clean the crab shells, dry the crab shells at 65°C to constant weight, crush the crab shells to obtain crab shell dregs, and then ball mill the crab shell dregs. After 3 hours of ball milling, pass through a 200-mesh sieve, and take the energy that ca...

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Abstract

The invention relates to a repair method of acid contaminated soil. The repair method comprises the following steps of detecting a pH value of the acid contaminated soil, uniformly spraying weakly alkaline liquid to the acid contaminated soil, standing for 2 to 4 h after the acid contaminated soil is soaked in the weakly alkaline liquid, and then turning over the acid contaminated soil; spraying the weakly alkaline liquid to the acid contaminated soil again after turnover, and standing for 2 to 4 h so as to obtain a soil mixture I; adding a soil conditioner to the soil mixture I, uniformly mixing the soil mixture I and the soil conditioner, and standing for 24 to 48 h so as to obtain a soil mixture II; adjusting the water content of the soil mixture II to 60 to 70%; and then putting earthworms, and culturing for 30 to 45 days, so that the acid contaminated soil is repaired. The repair method has a good repair effect on the acid contaminated soil, so that the acid contaminated soil canmeet the requirements of residential land, commercial land and industrial land; in addition, the whole repair cycle of the contaminated soil is short, and the efficiency is high.

Description

technical field [0001] The invention relates to the technical field of contaminated soil treatment, in particular to a method for remediating acidic contaminated soil. Background technique [0002] At present, with the contradiction between population and environmental resources becoming more and more prominent, in recent decades, with the development of my country's industry, the massive discharge of acid gas and the increasing impact of acid deposits on the environment, soil degradation has become a major global problem. As an important aspect of soil degradation, soil acidification accelerates the increase of soil acidity, which will cause the loss of a large number of soil nutrients and the decline of soil fertility, which will seriously affect the growth of crops. With the rapid development of the modern economy, human activities have caused heavy metals such as cadmium, lead, zinc, and chromium to be continuously released into the environment, accumulate in the soil, a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/08B09C1/10C09K17/40C09K109/00
CPCB09C1/08B09C1/10B09C2101/00C09K17/40C09K2109/00
Inventor 陈作昌何运龙谭善名
Owner 广东建诚明德建设管理有限公司
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