Environmental protection agent for reducing leaching concentrations of a variety of heavy metals

A technology for leaching concentration and heavy metals, which is applied in the restoration of polluted soil, organic fertilizers, fertilizer mixtures, etc., can solve the problems of inability to guarantee the stable existence of compounds, secondary pollution, heavy metals are easy to be reactivated, etc., to improve the restoration effect, Low production cost, good use effect

Inactive Publication Date: 2018-08-24
益壤(厦门)环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For a long time, the stabilizing effect of most chemical stabilizers on soil can only last for several months or even a few days. Secondary pollution

Method used

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  • Environmental protection agent for reducing leaching concentrations of a variety of heavy metals
  • Environmental protection agent for reducing leaching concentrations of a variety of heavy metals

Examples

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Effect test

Embodiment 1

[0021] An environment-friendly agent for reducing the leaching concentration of various heavy metals, the formulation of the environment-friendly agent is: 0.5wt% sodium silicate, 0.7wt% superphosphate, 0.3wt% ferrous sulfate, 1wt% humic acid Sodium, 0 wt% ethylenediaminetetraacetic acid (EDTA) and 0% sodium hydroxide. The superphosphate is potassium superphosphate.

Embodiment 2

[0023] An environment-friendly agent that reduces the leaching concentration of various heavy metals, the formula of the environment-friendly agent is: 35wt% sodium silicate, 41wt% superphosphate, 40wt% ferrous sulfate, 33wt% sodium humate, 22wt% % EDTA and 20% Sodium Hydroxide. The superphosphate is sodium superphosphate.

Embodiment 3

[0025] An environment-friendly agent that reduces the leaching concentration of various heavy metals, the formula of the environment-friendly agent is: 12wt% sodium silicate, 28wt% superphosphate, 33wt% ferrous sulfate, 18wt% sodium humate, 6wt% % ethylenediaminetetraacetic acid and 7% sodium hydroxide, also includes 1wt% surfactant. The surfactant is an anionic surfactant. The superphosphate is calcium superphosphate.

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Abstract

The invention discloses an environmental protection agent for reducing the leaching concentrations of a variety of heavy metals, wherein the components of the formula of the environmental protection agent comprises 0.5-35 wt% of sodium silicate, 0.7-41 wt% of superphosphate, 0.3-40 wt% of ferrous sulfate, 1-33 wt% of sodium humate, 0-22 wt% of ethylenediaminetetraacetic acid, and 0-20 wt% of sodium hydroxide. According to the present invention, the environmental protection agent can be prepared on site according to the pollution type and the ution degree of the soil on site, and the disadvantage that the stabilized repair fixed agent composition is difficultly adapted to the change of the pollution type and the pollution degree can be avoided; with the application of the slurry agent in repair of heavy metal contaminated soil and groundwater, the reaction efficiency is high; and with the environmental protection agent, the leaching toxicities of heavy metals especially copper, lead, cadmium and arsenic in the soil can be easily reduced.

Description

technical field [0001] The invention relates to the technical field of heavy metal pollution control, in particular to an environmental protection agent for reducing the leaching concentration of various heavy metals. Background technique [0002] Science and technology is a double-edged sword. The rapid development of science and technology since the 20th century has promoted economic development and improved people's living standards. However, at the same time, human beings have also paid a heavy price. Due to the discharge of industrial "three wastes" motor vehicle exhaust, sewage irrigation and the use of pesticides, herbicides, fertilizers, etc., as well as the development of mining, the soil, water quality and atmosphere have been seriously polluted. [0003] Heavy metal pollution refers to environmental pollution caused by metals or their compounds with a density above 5. In terms of environmental pollution, heavy metals refer to heavy metals with significant biologic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K17/40B09C1/08B09C1/00
CPCB09C1/002B09C1/08C09K17/40
Inventor 郑彬苏水兰苏榕斌纪惠那
Owner 益壤(厦门)环保科技有限公司
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