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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: 2015-11-18
SHENZHEN TECHAND ECOLOGY & ENVIRONMENT CO LTD
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  • Claims
  • Application Information

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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 10 mL of γ-mercaptopropyltrimethoxysilane solution; 2) Prepare polyhydric iron polymer solution: weigh 40.4g Fe(NO 3 ) 3 Dissolve 9H2O in 1L water to get 1L0.1mol·L -1 Fe(NO 3 ) 3 Solution; Weigh 16gNa 2 CO 3 Added to the prepared 1L0.1mol·L -1 FeNO 3 solution, stirred for 2 hours; the obtained solution was aged in a constant temperature dryer at 80°C for 24 hours, and then used; 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 them...

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Abstract

The invention discloses a heavy metal stabilizer which comprises sodium bentonite, zeolite powder, sulfydryl-iron base modified charcoal, reduced iron powder and calcium oxide. By carrying out sulfydryl-iron base modification on charcoal, the adsorption property of the heavy metal stabilizer to heavy metal is improved greatly; by mixing the sulfydryl-iron base modified charcoal with sodium bentonite, zeolite powder, reduced iron powder and calcium oxide, the heavy metal stabilizer is obtained. Compared with other materials, the heavy metal stabilizer has a better heavy metal adsorption property, can be applied to soil of different pH and combined pollution of multiple pollutants such as lead, zinc, copper, cadmium and arsenium at different degrees through reasonable proportioning, can simultaneously and effectively reduce exchangeable form quantity of pollutants such as lead, zinc, copper, cadmium and arsenium in soil, and is high in efficiency, stable and effective for a long term.

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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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
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