Heavy metal remediation agent formula for soil remediation and preparation method thereof

Abstract

The invention discloses a heavy metal remediation agent formula for soil remediation, which comprises the following raw materials: deseeded sunflower heads, switchgrass branches and leaves, kaolin, calcium carbonate, an organic fertilizer, pinus elliottii needle leaves, polyaluminum chloride, polyaluminum ferric chloride, bacterial strains and a proper amount of water. Through addition of an organic fertilizer, a large amount of organic matter and nutritional ingredients can be supplied to the contaminated soil, the potential fertility of the contaminated soil is improved, the buffer performance of the soil is improved through modified calcination of kaolin in combination with calcium carbonate, the soil is loosened, and by adding polyaluminum chloride and polyaluminum ferric chloride, theactivity of heavy metal in the soil and the effectiveness of plants are improved; the utilization value of the soil is greatly increased, and the soil remediation is safe and effective through the addition of strains. The preparation method of a formula of a heavy metal repairing agent for soil remediation is convenient to operate, environmentally friendly and harmless, and the prepared heavy metal repairing agent is low in cost, obvious in effect and suitable for wide application and popularization.

Description

technical field [0001] The invention relates to the technical field of soil restoration, in particular to a formula of a heavy metal restoration agent for soil restoration and a preparation method thereof. Background technique [0002] Heavy metal cadmium and its compounds are toxic to a certain extent, and were once the source of pollution that caused Japan's "Itai-Itai" pollution incident. In February 2013, Nanfang Daily published the article "Hunan Problem Rice Flows to Guangdong's Table". The pollution of cultivated land soil by heavy metal cadmium has attracted widespread attention. According to the National Soil Pollution Survey Bulletin, among the 8 heavy metal pollutants of cadmium, mercury, arsenic, copper, lead, chromium, zinc, and nickel, cadmium pollution ranks first, and its point exceeding standard rate reaches 7%. Cadmium is the primary pollutant in cultivated land. Cadmium pollution mainly exists in mining areas, sewage irrigation areas, and suburban agricul...

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Problems solved by technology

[0003] The methods for remediation of heavy metals in soil can be divided into three types: physical methods, chemical methods and biological methods, physical methods include deep plowing method, alien soil method, etc., chemical methods include leaching method, passivation method, etc., biological methods include phytoremediation At present, the remediation technology of heavy metal-contaminated soil mainly adopts chemical means. However, a large number of chemical agents used in the remediation process can easily cause soil re-pollution. Biochar has good adsorption performance and stable chemical properties. Reducing the bioavailability of heavy metals in the soil can increase crop yields at the same time, and the wide range of raw materials and low cost make it have obvious advantages and application value in the treatment of heavy metal polluted soil. Therefore, we propose a method for soil remediation Formula and preparation method of heavy metal restoration agent

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