Cadmium-arsenic absorbing material and preparing method and application thereof

An adsorption material and application technology, applied in the field of soil pollution remediation, can solve the problem that the simultaneous removal ability of arsenic and cationic metal pollutants is not considered, the simultaneous removal ability of cationic metal pollutants is not considered, and the adsorption material arsenic removal efficiency is poor. and other problems to achieve the effect of reducing the risk of secondary dissolution, improving the physical and chemical properties of soil, reducing safety risks and human health hazards
CN104941583AActive Publication Date: 2015-09-30中科康成农业科技浙江有限公司
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
中科康成农业科技浙江有限公司
Publication Date
2015-09-30

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Abstract

The invention discloses a cadmium-arsenic absorbing material and a preparing method and application thereof. The cadmium-arsenic absorbing material includes the steps that biomass is smashed and heated to 500 DEG C quickly under the limited oxygen or oxygen-free condition, then thermal cracking is conducted till the biomass is totally carbonized, the biomass is cooled naturally to the room temperature, smashing is conducted, and an absorbing material precursor is obtained; the absorbing material precursor is mixed with a ferric salt solution, a mixture of the absorbing material precursor and the ferric salt solution is prepared, the mixture is placed at the temperature of 110 DEG C to 150 DEG C to conduct reaction for 12 hours and then is cooled to the room temperature, dissociative ferric salt remaining on the surface of the material is washed out, and the cadmium-arsenic absorbing material is obtained after being dried at 80 DEG C. The cadmium-arsenic absorbing material and the preparing method and application can be used for absorbing cadmium and / or arsenic and restoring soil or water polluted by heavy metal; secondary pollution is avoided; the soil physicochemical property is improved; meanwhile, biomass waste is converted into a soil restoration material, the cadmium-arsenic absorbing material is low in cost and wide in source, and the soil restoration cost is lowered.
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Description

technical field

[0001] The invention relates to the field of soil pollution restoration, in particular to a cadmium and arsenic adsorption material, a preparation method and an application. Background technique

[0002] With the rapid development of the economy, human activities have caused a large amount of pollutant discharge, and environmental problems have become increasingly prominent. Among them, soil heavy metal pollution is an important issue that people pay attention to. These heavy metal pollutants are absorbed by crops and transmitted through the food chain, which may further affect human health. At the same time, with rainfall / runoff, heavy metal pollution in soil will also migrate to surface water bodies and groundwater, and cause serious harm to the human body through drinking water intake and other ways. Therefore, remediation of heavy metal-contaminated soil has become a hot spot. However, metal pollutants in soil come from a wide variety of sources and can...

Claims

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