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Method for separating cadmium, lead, chromium, arsenic and mercury in paddy field soil

A soil and paddy field technology, applied in the field of agricultural soil remediation, can solve problems affecting human health, achieve the effect of eliminating the source of harmful heavy metals and ensuring safety

Inactive Publication Date: 2014-09-24
柏连阳
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the variability of climate farming systems, its solubility can change anytime and anywhere, and it is still impossible to separate the pollution of harmful heavy metals such as lead, cadmium, arsenic, chromium, mercury in the soil, which seriously affects people's health

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Embodiment one: another kind of method for separating harmful heavy metals in paddy field soil, it comprises the steps:

[0025] 1. Sampling and sample preparation: According to the wind direction, water direction, terrain, terrain and other factors at that time, 5 sampling points were determined in the paddy field, and the soil samples were taken according to the relevant standards of GB / T4100-1999, and the quartering method was used. Sample;

[0026] 2. Analysis of soil samples: The total amount of harmful heavy metals of lead, cadmium, arsenic, mercury, and chromium ions harmful to crops in the cultivated layer of the soil was detected to be xppm.

[0027] 3. Soaking for weeding: After eradicating weeds in the field, pour irrigation water without heavy metals into the field, so that the water surface can be stabilized at 3~6cm for 2~3 days, so that the soil can be fully soaked, which is convenient for subsequent operations;

[0028] 4. Activation: select the debondi...

Embodiment 2

[0031] Embodiment two: another kind of method for separating harmful heavy metals in paddy field soil, it comprises the steps:

[0032] 1. Sampling the soil in the field: According to the wind direction, water direction, terrain, topography and other factors at that time, determine 10 sampling points in the working paddy field, take soil samples according to the relevant standard GB / T4100-1999, and reduce the sample by quarter legal sample;

[0033] 2. Analysis of soil samples: The total amount of harmful heavy metals in the soil, such as lead, cadmium, arsenic, mercury, and chromium ions that are harmful to crops, is yppm, and the total weight of the soil cultivation layer is calculated.

[0034] 3. Weeding and soaking: After eradicating weeds in the field, pour irrigation water without heavy metals into the field, so that the water surface can be stabilized at 6cm for 3 days, so that the soil can be fully soaked, which is convenient for subsequent operations;

[0035] 4. Ac...

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PUM

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Abstract

The invention relates to a method for separating cadmium, lead, chromium, arsenic and mercury in paddy field soil, which belongs to the technical field of agriculture soil restoration. The method employs a degumming agent and a polymerization displacement agent, the method comprises the following steps: 1)sampling soil in field; 2)analyzing oil sample; 3)weeding and immersing; 4)activating; 5)displacing and absorbing; 6)stirring; finally collecting through concentration to reach the purpose of separating and detoxifying. According to the invention, source of harmful heavy metal in paddy field can be eliminated at large limitation, so that problem of secondary dissolving of deposition formed by a lime emulsification method and a bleaching powder oxidation process can be avoided.

Description

technical field [0001] The invention relates to a method for separating cadmium, lead, chromium, arsenic and mercury in paddy field soil, belonging to the technical field of agricultural soil restoration. Background technique [0002] While modern industry has brought rich material and cultural life to people, it has also had a major impact on the environment. Frequent mass poisoning and public health incidents have sounded the alarm for people's disorderly development. The typical impact is; The heavy metal pollution of the arable land on which they live has exceeded the national discharge standard dozens of times, and some even exceeded 2,000 times, reaching a shocking level. At present, the methods for farmers to separate harmful heavy metals in paddy fields are: one is to use lime milk precipitation method, the other is to use bleaching powder oxidation method, and the third is to use barium salt method. As a result, when lime milk precipitation method is used, new chlor...

Claims

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Application Information

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IPC IPC(8): B09C1/08
Inventor 柏连阳齐绍武雷星宇陈淑萍张义钟治舜
Owner 柏连阳
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