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An in-situ long-term remediation material for copper-contaminated soil

A technology for repairing materials and copper pollution. It is applied in the field of environmental governance and can solve problems such as pollution concealment, nutritional imbalance, and crop yield and quality decline.

Active Publication Date: 2021-02-23
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This type of pollution has a wide range, long duration, hidden pollution, and cannot be biodegraded, which will lead to soil degradation, decline in crop yield and quality, and pollute surface water and groundwater through runoff and leaching.
Excessive heavy metals will have adverse effects on plant physiological functions, making it nutritionally imbalanced

Method used

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  • An in-situ long-term remediation material for copper-contaminated soil
  • An in-situ long-term remediation material for copper-contaminated soil

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experiment example

[0042] In order to further illustrate the present invention, the following 5 groups of experiments are set up as shown in Table 1, but the present invention is not limited thereto. Experiment 1 was carried out according to the following steps [1] and [5], Experiment 2 and Experiment 4 were carried out according to the following steps [1], [2], [4], [5] respectively, and Experiment 1 and Experiment 3 were carried out according to the following steps [1], [2], [3], [4], [5] for experiments.

[0043] Table 1 Experimental design

[0044]

[0045] experimental method:

[0046] [1] Prepare 10kg of contaminated soil with a copper content of 20.0mg / kg, place it in a flowerpot with a sealed bottom, a diameter of 30cm at the top, and a height of 50cm.

[0047] [2] Weigh the corresponding quality materials according to the above table, mix them evenly, and form granules with a diameter of about 4mm after high-pressure extrusion granulation (compression ratio 20:1).

[0048][3] Keep...

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Abstract

This application provides an in-situ long-term restoration material for copper-contaminated soil, including three materials for repairing copper pollution; one is composed of a matrix that absorbs copper; the other is a matrix that can absorb copper and is coated with a short-term degradable film Particulate matter; a particulate matter that coats a substrate capable of absorbing copper with a long-term degradable film. The in-situ long-term restoration materials for copper-contaminated soil provided by this application will take effect immediately after application without film wrapping, and the validity period is 3-6 months; the materials wrapped with polyester film are 3-6 months in the soil The material begins to degrade within a month, and the material begins to take effect; the coated polyester film-wrapped material begins to degrade within 12-18 months in the soil, and the material begins to take effect, and the long-term effect of the pollution control material is generally realized.

Description

technical field [0001] The invention relates to the technical field of environmental treatment, in particular to an in-situ long-acting restoration material for copper-contaminated soil. Background technique [0002] Soil is the natural environment on which human beings depend and an important resource for agricultural production. Food, resources and environment soil heavy metal pollution that the world is facing refers to pollution caused by excessive accumulation of heavy metals in soil. Heavy metals in contaminated soil include elements with significant biological toxicity such as Cd, Pb, Hg, Cr, As, and elements with certain toxicity such as Cu, Zn, Ni. This type of pollution has a wide range, long duration, hidden pollution, and cannot be biodegraded, which will lead to soil degradation, decline in crop yield and quality, and pollute surface water and groundwater through runoff and leaching. Excessive heavy metals will have adverse effects on plant physiological funct...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K17/40
CPCC09K17/40
Inventor 孙海龙苟敏刘志斌李乃稳李绍才王丽
Owner SICHUAN UNIV