Heavy metal soil remediation agent and preparation method thereof

Abstract

The invention discloses a heavy metal soil remediation agent and a preparation method thereof. The heavy metal soil remediation agent is composed of the following formula ingredients in parts by mass: 10-20 parts of activated carbon fibers, 5-7 parts of a phosphate compound, 4-6 parts of polyamide fibers, 5-6 parts of sodium bismuthate, 14-16 parts of aminopolycanboxylic acid, 16-18 parts of a bio-emulsifier, 6-10 parts of sodium lignin sulfonate, 6-8 parts of organic acid, 2-4 parts of organic matters and 3-5 parts of sodium sulfide. The heavy metal soil remediation agent disclosed by the invention is reasonable in formula, the preparation method is simple, multiple heavy metal pollutants in soil can be effectively reduced, the soil air permeability can be improved, the growth environment of crops can be improved, and the heavy metal soil remediation agent is environment-friendly and green.

Description

technical field [0001] The invention relates to the field of soil restoration, in particular to a heavy metal soil restoration agent and a preparation method thereof. Background technique [0002] According to the "National Soil Pollution Survey Bulletin" issued by the Ministry of Environmental Protection and the Ministry of Land and Resources in 2014, the overall situation of the national soil environment is not optimistic, the soil pollution in some areas is relatively serious, the quality of the soil environment of cultivated land is worrying, and the soil environment problems of industrial and mining wasteland are prominent. . Man-made activities such as industry, mining, agriculture, and high background values ​​of the soil environment are the main causes of soil pollution or exceeding standards. The total exceeding rate of national soil is 16.1%, of which the proportions of slightly, lightly, moderately and heavily polluted sites are 11.2%, 2.3%, 1.5% and 1.1% respect...

AI Technical Summary

Problems solved by technology

[0003] At present, the treatment methods for soil heavy metal pollution mainly include immobilization / stabilization, leaching, soil washing, electrokinetic remediation, chemical reduction, phytoremediation, and microbial remediation. There are generally problems such as low remediation efficiency and high treatment costs.

Traditional remediation methods such as landfill, leaching, electrochemistry, etc. have a large amount of engineering, high cost, and often lead to soil structure damage and loss of some nutrients