An in-situ long-term remediation material for arsenic-contaminated soil
A technology for repairing materials and arsenic pollution, which is applied in the field of environmental governance and can solve problems such as soil degradation, crop yield and quality decline, and adverse effects on plant physiological functions
Active Publication Date: 2021-02-26
SICHUAN UNIV
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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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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 steps:
[0046] [1] Prepare 10 kg of contaminated soil with an arsenic content of 20.0 mg / kg, and place it in a flowerpot with a sealed bottom, a diameter of 30 cm at the top, and a height of 50 cm.
[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). ...
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Abstract
This application provides an in-situ long-term repair material for arsenic-contaminated soil, including three materials for repairing arsenic pollution; one is composed of a matrix that adsorbs arsenic; Particulate matter; a type of particulate matter in which a substrate capable of absorbing arsenic is coated with a long-term degradable film. The in-situ long-acting repair materials for arsenic-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 arsenic-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 func...
Claims
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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