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Conditioner for treating heavy metal contaminated soil, preparation method and applications thereof

A technology of polluted soil and conditioning agent, applied in the restoration of polluted soil, soil conditioning materials, application, etc., to achieve the effect of wide application range, high repair rate, and reduction of heavy metal content

Inactive Publication Date: 2019-12-20
HUNAN BREATH ENV TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] In order to solve the problems existing in the existing conditioners, the present invention provides a conditioner for treating heavy metal-contaminated soil, which aims to improve the effectiveness of the conditioner on heavy metals and improve the treatment effect of heavy metals

Method used

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  • Conditioner for treating heavy metal contaminated soil, preparation method and applications thereof
  • Conditioner for treating heavy metal contaminated soil, preparation method and applications thereof
  • Conditioner for treating heavy metal contaminated soil, preparation method and applications thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0072] Embodiment 1: the pot test of soil conditioner to the passivation effect of acidic soil pollution

[0073] The soil used for the test was collected from a 0-20cm plow layer soil polluted by heavy metals in a farmland in Xiangtan. The soil type is Quaternary red soil. The basic physical and chemical properties of the soil are shown in Table 1. The pot experiment was carried out in the net room of Qianping, Environmental Science Building, Hunan Agricultural University. A total of 5 treatments were set up: the polluted soil control without amendment (CK1), the soil conditioner prepared by preparation method I, and the soil conditioner prepared by preparation method II, with the addition amount being 1% and 2% respectively. Each treatment has 3 repetitions. See Table 2 for specific operations.

[0074] The collected soil was naturally air-dried and passed through a nylon sieve with a pore size of 0.83 mm. The culture basin is made of polyethylene material, the inner diam...

Embodiment 2

[0085] Example 2: Effects of Soil Conditioning Agents on Cd Absorption and Accumulation of Rice in South Acid Paddy Soil at Different Growth Stages

[0086]The test soil is located in a cadmium-contaminated farmland soil in Changsha City. The soil pH value is 6.12, the Cd content is 0.84mg / kg, and the available Cd content is 0.35mg / kg. Different soil conditioners were applied under water conditions, and their effects on cadmium uptake and accumulation by rice in cadmium-contaminated soil were studied, and the regularity of cadmium uptake and accumulation by rice in different growth stages was explored, in order to provide a scientific basis for using soil conditioners to restore cadmium-contaminated soil. Three groups of treatments were set up in the field plot experiment: the polluted soil control (CK2) without amendments, and the application rates of soil conditioner I and soil conditioner II were both 150kg. Selectively accumulate heavy metal rice variety (Zhongjiazao No. 1...

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Abstract

The invention relates to a conditioner for treating heavy metal contaminated soil, wherein the conditioner comprises a silicate source, biomass charcoal, fly ash, urea and a microbial strain accordingto a mass ratio of (1-3):(1-7):(1-5):(1-2):(1-4). The invention further provides a preparation method of the conditioner. According to the invention, by combining the components, the treatment on heavy metal contaminated soil can be significantly improved, the contents of cadmium and other heavy metals can be significantly reduced, and the yield and the quality of crops can be improved.

Description

technical field [0001] The invention relates to a conditioner for treating heavy metal polluted soil such as cadmium, a preparation method and application thereof, and belongs to the field of heavy metal polluted soil treatment. Background technique [0002] In recent years, my country's heavy metal pollution has shown an intensified trend, and soil heavy metal pollution poses a serious threat to the ecological environment, food safety and human health. On April 18, 2014, the Ministry of Environmental Protection and the Ministry of Land and Resources issued a survey bulletin showing that the overall soil environment in the country is not optimistic. Some areas have serious soil pollution, the soil environment quality of cultivated land is worrying, and the soil environment problems of industrial and mining wasteland are prominent. According to incomplete statistics, there are nearly 20 million hm2 of cultivated land in China currently polluted to varying degrees, accounting ...

Claims

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Application Information

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IPC IPC(8): C09K17/40C09K17/02B09C1/10A01B79/02C09K101/00
CPCA01B79/02B09C1/10B09C2101/00C09K17/02C09K17/40C09K2101/00
Inventor 刘羽翼罗琳刘晓月易均张燕李文洁宾震东周晟
Owner HUNAN BREATH ENV TECH CO LTD
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