Preparation method and application of soil heavy metal conditioner

Abstract

The invention belongs to the technical field of agricultural soil remediation, and particularly relates to a preparation method of a soil heavy metal conditioner, which comprises the following steps: calcining a curing raw material at high temperature, crushing, sieving, adding water, boiling for multiple times, and cooling to obtain a chemical curing agent; then, agricultural waste is smashed and sieved, water is added, the mixture is stirred at a low speed at the normal temperature, and agricultural mixed waste is obtained and divided into two parts, namely waste A and waste B; next, adding a zymophyte agent into the waste A, spraying the waste A added with the zymophyte agent into a chemical curing agent, and fermenting to obtain a composite treatment agent; and finally, mixing and uniformly stirring the composite treatment agent and the waste material B to finally obtain the soil heavy metal conditioner. The invention further provides application of the soil heavy metal conditioner. According to the method, the repairing cost is reduced, the conditioning efficiency is improved, the application range is wide, and the practicability is high.

Description

technical field [0001] The invention belongs to the technical field of agricultural soil remediation, and particularly relates to a preparation method and application of a soil heavy metal conditioner. Background technique [0002] Heavy metal pollution will not only inhibit the growth and development of plants, but also transmit and accumulate through the food chain, ultimately endangering human health. Therefore, research and preparation of a soil heavy metal conditioner has become an urgent task at present. [0003] In the prior art, the patent No. CN102559195A of "a kind of soil heavy metal control conditioner and its production method" uses calcium silicate, bentonite and water as raw materials, and granulates to obtain a granular soil heavy metal control conditioner, which improves the soil The pH value can reduce the heavy metal content of crops, and also improve the yield and sweetness of sugarcane. However, it only has a significant effect on metal cadmium and has ...

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Problems solved by technology

[0003] In the prior art, the patent No. CN102559195A "a soil heavy metal control conditioner and its production method" uses calcium silicate, bentonite and water as raw materials, and granulates to prepare a granular soil heavy metal control conditioner, which improves the soil. The pH value can reduce the heavy metal content of crops, and also increase the yield and sweetness of sugarcane, but it only has a significant effect on metal cadmium, and its scope of application is narrow, which limits its application and development to a certain extent

As another example, the patent No. CN105199737A "a soil conditioner for treating heavy metal pollution" uses calcium oxide, silicon dioxide and magnesium oxide as raw materials, and adds other non-functional mineral elements without changing the nature and nature of the cultivated land. It can reduce the cadmium in rice to less than 0.01ppm, and increase the yield by up to 37%. It has the advantages of strong functionality, high economy and high safety, but it is the same as the above patent, only has a significant effect on metal cadmium. The scope of application is narrow, so the formula and preparation method of the soil conditioner can be optimized on the basis of the above patents to achieve better heavy metal conditioning effect

As another example, the patent No. CN104893729A "a conditioner for reducing the activity of heavy metal ions in vegetable soil" uses potassium hydrogen phosphate, 2-hydroxyaniline, yeast, and bacillus as raw materials, and combines various types of soil heavy metal conditioners. The heavy metal conditioning effect has been improved to a certain extent, but its effect is still single, and the heavy metal removal rate needs to be further improved

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