Nickel-contaminated soil repairing material as well as preparation method and application thereof

A technology for contaminated soil and repair materials, applied in the field of nickel-contaminated soil repair materials and its preparation, can solve the problems of high price and unfavorable promotion and use of repair materials, and achieve the effect of convenient operation, convenient promotion and use, and simple repair methods

Inactive Publication Date: 2018-10-09
SOUTH CHINA NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In recent years, many scholars use clay minerals to fix heavy metals in soil because of their advantages such as wide sources, abundant reserves, stable structure, low price, strong adsorption capacity and strong ion exchange capacity. One or several kinds of restoration materials, the stability of the restoration needs to be improved, and the price of the materials is relatively high, which is not conducive to the popularization and use of restoration materials

Method used

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  • Nickel-contaminated soil repairing material as well as preparation method and application thereof
  • Nickel-contaminated soil repairing material as well as preparation method and application thereof
  • Nickel-contaminated soil repairing material as well as preparation method and application thereof

Examples

Experimental program
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Effect test

preparation example Construction

[0027] The following preparation steps for testing nickel-contaminated soil are:

[0028] Take soil from a certain site in a university in Guangzhou, remove the top 10cm of surface soil, take 10-20cm of soil, add nickel nitrate to the soil, stir evenly, let it stand and mature until it is naturally air-dried. After being placed for one month, the experiment was carried out as a simulated polluted soil. The soil moisture content is 12.33%, the pH value is 4.20, the total nickel content is 350.82mg / kg, and the nickel concentration in the leaching solution obtained according to "HJ / T 299-2007 Solid Waste Leaching Toxicity Leaching Method Sulfuric Acid Nitric Acid Method" is 19.870mg / L .

Embodiment 1

[0030] A preparation method for nickel-contaminated soil remediation material, comprising the following steps:

[0031] (1) After grinding industrial-grade pure mineral material sepiolite and artificial zeolite respectively, pass through a 320 mesh sieve to obtain a powdery material with a particle size of 45um;

[0032] (2) Mineral material sepiolite 15g after grinding and artificial zeolite 10g are mixed with composite material anhydrous disodium hydrogen phosphate 5g and unslaked lime 15g;

[0033] (3) Grinding and sieving the mixed material to prepare a remediation material for nickel-contaminated soil with a particle size of 0.1 μm.

[0034] Add the above-mentioned nickel-contaminated soil remediation materials into the soil and mix evenly.

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Abstract

The invention belongs to the technical field of contaminated soil repairing, and particularly relates to a nickel-contaminated soil repairing material as well as a preparation method and application thereof. According to the invention, the nickel-contaminated soil repairing material is prepared by using a mineral material and a compounding material as a formula. The nickel-contaminated soil repairing material has a large specific surface area and high repairing efficiency to nickel-contaminated soil, can solidify nickel in the contaminated soil, improves an acidic environment of the contaminated soil, does not produce secondary pollution, and has advantages of low price, simple repairing method, short repairing time and easy promotion and use.

Description

technical field [0001] The invention belongs to the technical field of contaminated soil remediation, and in particular relates to a nickel-contaminated soil remediation material and a preparation method and application thereof. Background technique [0002] Soil is one of the main natural resources that human beings rely on for survival. Due to the enrichment, high toxicity and refractory properties of heavy metals, heavy metals in soil can enter rivers, lakes and groundwater through rainwater, which is likely to cause water pollution and affect the ecological environment. Therefore, the restoration of heavy metals in soil is imminent. [0003] At present, there are physical remediation, biological remediation and chemical remediation methods for remediation of heavy metal nickel-contaminated soil. Physical restoration methods include alien soil method, heat treatment, vitrification technology, and electric restoration method; biological restoration methods include plant r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/08C09K17/00
CPCB09C1/08B09C2101/00C09K17/00
Inventor 王建乐谢仕斌方战强
Owner SOUTH CHINA NORMAL UNIVERSITY
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