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Method for restoring lead polluted soil with amino trimethylene phosphonic acid (ATMP)

A technology of aminotrimethylene phosphonic acid and lead-contaminated soil, applied in the field of leaching and remediation of lead-contaminated soil, which can solve the problems of lack of research and achieve the effects of low environmental risk, high remediation efficiency, and high leaching efficiency

Inactive Publication Date: 2014-03-19
LIAONING UNIVERSITY OF PETROLEUM AND CHEMICAL TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at present ATMP is only used in water treatment and other industries, and there is a lack of related research on soil leaching and remediation.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] Accurately weigh 1.00 g of artificial lead-contaminated soil sample, and the concentration of heavy metal lead in the soil is 1000 mg kg -1 According to the solid-to-liquid ratio of 1:25, add ATMP solutions with concentrations of 1, 5, 10, 15, 20, 25, and 30%. Shake at room temperature for 12 h, then let stand for 12 h, centrifuge at 4000 r / min for 20 min, filter, and determine the content of heavy metal lead in the supernatant, each treatment is repeated 3 times.

[0011] Table 1 The effect of ATMP on the removal rate of heavy metal lead.

[0012] Eluent concentration (%) CK 1 5 10 15 20 25 30 Removal rate (%) 10 22 38 65 73 88 85 86

[0013] The results showed that the maximum removal rate of heavy metal Pb reached 88% by using ATMP to remediate artificial lead-contaminated soil by oscillating leaching.

Embodiment 2

[0015] Accurately weigh 1.00 g of artificial lead-contaminated soil sample, and the concentration of heavy metal lead in the soil is 2000 mg kg -1 , according to the solid-to-liquid ratio of 1:25, add ATMP solutions with concentrations of 5, 10, 15, 20, 30, 40, and 50%. Shake at room temperature for 12 h, then let stand for 12 h, centrifuge at 4000 r / min for 20 min, filter, and determine the content of heavy metal lead in the supernatant, each treatment is repeated 3 times.

[0016] Table 2 The effect of ATMP on the removal rate of heavy metal lead.

[0017] Eluent concentration (%) CK 5 10 15 20 30 40 50 Removal rate (%) 9 17 35 41 63 76 83 80

[0018] The results showed that the removal rate of heavy metal Pb was up to 83% by using ATMP to remediate artificial lead-contaminated soil by oscillating leaching.

Embodiment 3

[0020] The lead-contaminated soil collected in the Shenyang smelter in 2007 was used for vibration leaching experiments, and the lead concentration was 4020 mg kg -1 . Accurately weigh 1.00 g of contaminated soil samples, and add ATMP solutions with concentrations of 10, 20, 30, 40, 50, 60, and 70% according to the solid-to-liquid ratio of 1:25. Shake at room temperature for 12 h, then let stand for 12 h, centrifuge at 4000 r / min for 20 min, filter, and determine the content of heavy metal lead in the supernatant, each treatment is repeated 3 times.

[0021] Table 3 The effect of ATMP on the removal rate of heavy metal lead.

[0022] Eluent concentration (%) CK 10 20 30 40 50 60 70 Removal rate (%) 8 23 39 52 65 73 85 80

[0023] The results show that the removal rate of heavy metal Pb can reach up to 85% by using ATMP to remediate lead-contaminated soil in Shenyang smelter by means of oscillation leaching.

[0024] From the above three ...

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PUM

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Abstract

The invention discloses a method for restoring lead polluted soil with amino trimethylene phosphonic acid (ATMP), which has the advantages of higher biodegradability and higher rinsing efficiency. The method comprises the following steps: accurately weighing 1.00g of lead polluted soil sample, adding a 10-70% ATMP solution in a solid-to-liquid ratio of 1:25, oscillating at room temperature, standing, centrifugating and filtering to complete the rinsing process, wherein the oscillation time is 12 hours, the standing time is 12 hours, the centrifugating speed is 4000 r / min, and the centrifugating time is 20 minutes. The lead concentration of the polluted soil is 1000-4020 mg.kg<-1>. By using the ATMP for reinforced restoration of the lead polluted soil, the method has the characteristics of high restoration efficiency, high operability, low environmental risk and the like.

Description

technical field [0001] The invention relates to the technical field of leaching and restoration of lead-contaminated soil, in particular to a method for repairing lead-contaminated soil by using aminotrimethylene phosphonic acid. Background technique [0002] Lead has low solubility in soil and long residence time. It is a non-degradable environmental pollutant. After accumulation in topsoil, it not only affects the yield and quality of crops, but also affects human health through the food chain. The damage of lead to the body is multi-system and multi-organ. As a central nervous system poison, lead has more serious harm to children's body and intelligence. In recent years, along with mining, urbanization, transportation, farmland sewage irrigation, sludge agricultural use, etc., a large amount of lead elements have entered the soil system, which has seriously threatened the ecological environment and human health. The control and restoration of soil lead pollution is immine...

Claims

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Application Information

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IPC IPC(8): B09C1/08
Inventor 崔爽赵杉林李萍刘艺芸孙秀菊
Owner LIAONING UNIVERSITY OF PETROLEUM AND CHEMICAL TECHNOLOGY
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