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A heavy metal stabilizer

A heavy metal stabilizer and sulfhydryl technology, which is applied in the field of environmental pollution control, can solve problems such as the inability to effectively deal with multiple heavy metal composite pollution, and achieve the effects of long-term stable and effective efficiency, high efficiency and improved adsorption performance.

Active Publication Date: 2018-07-13
SHENZHEN TECHAND ECOLOGY & ENVIRONMENT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at present, most heavy metal stabilizers are only effective for one or a few heavy metals, and cannot effectively deal with the problem of multiple heavy metal compound pollution. It is necessary to develop a heavy metal stabilizer that is effective for multiple heavy metals

Method used

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Embodiment Construction

[0031] 1. Preparation of heavy metal stabilizer

[0032] Prepare mercapto-iron-based modified biochar according to the following steps: 1) Prepare mercapto complex solution: measure 0.5ml γ-mercaptopropyltrimethoxysilane, by volume ratio γ-mercaptopropyltrimethoxysilane: ethanol: Water=0.5:9:0.5 Prepare 10mL of γ-mercaptopropyltrimethoxysilane solution; 2) Prepare polyhydric iron polymer solution: weigh 40.4g Fe(NO 3 ) 3 Dissolve 9H2O in 1L water to get 1L 0.1mol·L -1 Fe(NO 3 ) 3 Solution; Weigh 16g Na 2 CO 3 Added to the prepared 1L 0.1mol·L - 1 FeNO 3 solution, stirred for 2 hours; aged the obtained solution in a constant temperature desiccator at 80°C for 24 hours, and set aside; 3) Preparation of biochar suspension: weigh 4g of dry biochar and add it to 200mL deionized water, stir evenly, and obtain the mass The fraction is 2% biochar suspension; 4) Measure 400mL polyhydric iron polymer solution and 10mL γ-mercaptopropyltrimethoxysilane solution, and gradually add...

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Abstract

The invention discloses a heavy metal stabilizer, which comprises sodium-based bentonite, zeolite powder, mercapto-iron-based modified biochar, reduced iron powder and calcium oxide. By modifying biochar with mercapto-iron group, its adsorption performance for heavy metals is greatly improved. By mixing mercapto-iron-based modified biochar with sodium bentonite, zeolite powder, reduced iron powder and calcium oxide, heavy metals can be obtained Stabilizer, which has better heavy metal adsorption performance than other materials, can be applied to different pH soils and different degrees of lead, zinc, copper, cadmium, arsenic and other multi-pollutant composite pollution through reasonable proportioning, and can effectively reduce the amount of pollutants in the soil at the same time. The exchangeable state of lead, zinc, copper, cadmium, arsenic and other pollutants has high efficiency and is stable and effective for a long time.

Description

technical field [0001] The invention relates to the technical field of environmental pollution control, in particular to a heavy metal stabilizer. Background technique [0002] Soil heavy metal pollution refers to the phenomenon that heavy metals enter the soil due to human activities, causing the content of heavy metals in the soil to be significantly higher than the background value, and resulting in a decline in the quality of the ecological environment. Heavy metals in contaminated soil mainly include elements with significant biological toxicity such as mercury (Hg), cadmium (Cd), lead (Pb), chromium (Cr) and metalloid arsenic (As), as well as elements with certain toxicity such as zinc (Zn ), copper (Cu), nickel (Ni), etc. Heavy metal pollutants have very little mobility in the soil, are not easily leached with water, and are not degraded by microorganisms. They will accumulate in the human body through the food chain and seriously endanger human health. For example:...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K17/40B09C1/08
Inventor 龚亚龙黄雷刘登彪林晓燕任重许闯张时伟王成聪
Owner SHENZHEN TECHAND ECOLOGY & ENVIRONMENT CO LTD