A kind of method utilizing plant active substance to prepare soil cadmium activator

Abstract

The invention relates to the field of soil conditioners and aims at providing a method for preparing a soil cadmium activating agent by utilizing a plant active substance. The method comprises the following steps: crushing fresh pineapple peel residues to obtain pineapple raw pulp; adding ultrapure water while stirring; after uniformly stirring, carrying out ultrasonic treatment; filtering to obtain supernatant; adding a chelating agent GLDA (Glutamic acid Diacetic acid) solution and a biological surfactant tea saponin solution and carrying out oscillation treatment; centrifuging and separating to obtain supernatant; regulating the pH (Potential of Hydrogen) value to be 5 and sealing and preserving in a dark place. Compared with the prior art, the novel heavy metal activating agent provided by the invention has the advantages of wide raw material source and low price. The preparation method is simple and short in time consumption. The heavy metal activating agent is green and environmentally friendly and secondary pollution is not caused.

Description

technical field [0001] The invention relates to the field of soil conditioners, especially a heavy metal soil activator, and seeks a new activator with fruit residues as the main body, which has a wide range of sources, is environmentally friendly and low in cost, and can not only activate soil cadmium, but also not cause Environmental pollution, while realizing the utilization of waste resources. Background technique [0002] my country's soil is seriously polluted by heavy metals, among which cadmium pollution is the most prominent, with a maximum rate of 7% exceeding the standard (National Soil Pollution Survey Bulletin, 2014). Soil cadmium pollution not only endangers the safety of agricultural products, but also affects human health through the food chain. Therefore, the remediation and control of cadmium-contaminated soil is imminent. At present, the remediation of soil heavy metal pollution mainly includes engineering measures, physical and chemical measures, biolog...

AI Technical Summary

Problems solved by technology

Ethylenediaminetetraacetic acid (EDTA) is a widely used artificial organic chelating agent, which has outstanding activation efficiency for heavy metals, but EDTA has phytotoxicity and low biodegradability, and the chelates formed with metals are very soluble in water Entering rivers and lakes, the environmental risk is greater

Therefore, some green natural chelating agents that can be degraded by microorganisms such as GLDA and low molecular weight organic acids such as citric acid and oxalic acid have attracted the attention of researchers. However, these chelating agents have problems such as high price and high cost, which limit their popularization and application.

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