Compound heavy metal passivation composition

Abstract

The invention discloses a compound heavy metal passivation composition. The heavy metal passivation composition comprises the following effective components by mass: 20 to 30 parts of zeolite, 20 to 30 parts of red mud, 20 to 30 parts of biochar, 20 to 30 parts of humic acid and 5 to 15 parts of silicon-potash fertilizer. Specifically, the heavy metal passivation composition comprises 25 parts of zeolite, 25 parts of red mud, 25 parts of biochar, 25 parts of humic acid and 10 parts of silicon-potash fertilizer. The invention provides the heavy metal passivation composition with the effective components being zeolite, red mud, biochar, humic acid and silicon-potash fertilizer. Testing results show that slag can substantially reduce the content of Cd in plants. The heavy metal passivation composition provided by the invention is applicable to a variety of crops, especially to reduction of the content of Cd in rice plants, and has important application value.

Description

technical field [0001] The invention belongs to the field of agriculture and relates to a composite heavy metal passivation composition. Background technique [0002] In recent years, my country's heavy metal pollution has become more and more serious, showing the transfer of industry to agriculture, urban areas to rural areas, surface to underground, upstream to downstream, and from water and soil pollution to food chain. Sexual, interlocking, and regional outbreak stages. Soil heavy metal pollution poses a serious threat to the ecological environment, food safety and human health. [0003] On April 18, 2014, the Ministry of Environmental Protection and the Ministry of Land and Resources issued a national survey report on soil pollution. The survey sites covered all cultivated land, some forest land, grassland, unused land and construction land. The results show that the overall state of the soil environment in the country is not optimistic, among which heavy metal polluti...

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Problems solved by technology

The treatment of soil heavy metal pollution mainly includes biological, physical and chemical methods. Microbial and phytoremediation technologies are low in cost and environmentally friendly, but due to their small target biomass and long repair time, they are not suitable for farmland soil; physical methods are easy to operate, but The cost is high, and it is only applicable in a small area; the chemical in-situ passivation method is low in cost and easy to operate. Although it cannot completely remove heavy metals in the soil, it is suitable for a wide range of farmland, and choosing a suitable passivation agent is chemical. method key

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