A hexavalent chromium pollution in-situ repair agent fesx, preparation and application

An in-situ repair and hexavalent chromium technology, which is applied in the restoration of contaminated soil, application, water pollutants, etc., can solve problems such as unreasonable application of chromium-containing fertilizers and pesticides, decreased water permeability, and material corrosion. Long-term maintenance of soil reducibility, increased stability, and low-cost raw materials
CN105713615BActive Publication Date: 2019-05-31PEKING UNIV
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Patents(China)
Current Assignee / Owner
PEKING UNIV
Publication Date
2019-05-31

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Abstract

The invention discloses hexavalent chromium pollution in-situ repairing agent FeSx, preparation and application. The preparation includes: preparing a solution of water-soluble sulfur-containing regent as well as water-soluble iron-containing reagent, mixing well at pH 3.0-8.0, and carrying out solid-liquid separation to obtain solid that is iron polysulfide (FeSx), used as in-situ repairing agent for hexavalent chromium polluted soil and underwater.
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Description

technical field

[0001] The invention relates to an in-situ restoration agent for hexavalent chromium polluted soil and groundwater, a preparation method and a use method thereof. Specifically, FeS was prepared using water-soluble iron-containing reagents and water-soluble sulfur-containing reagents x , and apply it to the in-situ remediation of hexavalent chromium-contaminated soil, to restore and fix the hexavalent chromium in the soil, which is easy to migrate, has high toxicity and has phytotoxicity, and realizes the in-situ remediation of hexavalent chromium-contaminated soil and groundwater. Background technique

[0002] The "National Soil Pollution Survey Bulletin" released in April 2014 shows that my country's soil is seriously polluted by heavy metals. Chromium is one of the eight major heavy metal pollutants, and the national chromium pollution rate is 1.1%. There are many sources of chromium in soil, among which the most serious hazards mainly include three aspec...

Claims

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