Reducing aluminum-containing composite heavy metal passivation agent and use method thereof

Abstract

The invention discloses a reducing aluminum-containing composite heavy metal passivation agent and a use method thereof; the composite heavy metal passivation agent is formed by uniformly mixing sulfur, a reducing aluminum powder and calcium hydroxide according to the weight ratio of 2:15:100, and then during land finishing before sowing or seedling transplant, in a vegetable field polluted by heavy metals, the composite heavy metal passivation agent and a base fertilizer are together applied uniformly into soil of a plough layer, and the application amount is 117 kg/mu. Based on conventional application of a chemical fertilizer, the composite heavy metal passivation agent is additionally applied, the content of farmland soil available heavy metals can be significantly reduced, the absorption amount of vegetable crops on the soil heavy metals is reduced, the heavy metal pollution degree of vegetable products is alleviated, and human body heavy metal toxicity risks caused by eating of vegetables is reduced.

Description

technical field [0001] The invention belongs to the technical field of agricultural resources and environment, and in particular relates to a composite heavy metal passivator containing reduced aluminum and a use method thereof. Background technique [0002] With the rapid advancement of China's industrialization and urbanization process, soil heavy metal pollution has become increasingly prominent, and the "three wastes" of chemical, mining, and smelting industries, urban traffic, atmospheric deposition, livestock and poultry manure, urban sludge, pesticides and fertilizers have become major sources of pollution. According to the "National Soil Pollution Survey Bulletin" (April 17, 2014), the over-standard rate of cultivated land soil points in China was 19.4%, of which light and moderately polluted points accounted for 94.3% of the total over-standard points; Inorganic pollutants (inorganic pollutants refer to 8 heavy metals including cadmium, mercury, arsenic, copper, lea...

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Problems solved by technology

However, there are few research reports on the use of reduced aluminum to treat environmental pollutants, and there are only a few reports on the use

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