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An environment-friendly eluent for treating heavy metal polluted soil

An environmentally friendly technology for polluted soil, applied in the field of contaminated soil treatment, can solve the problems of toxicity, poor biodegradability, secondary pollution, etc., and achieve the effect of low cost

Active Publication Date: 2016-06-15
河北协同化学有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because these chelating agents have certain toxicity and poor biodegradability, they will enter the ecological cycle system as the main component of the washing agent, causing secondary pollution

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] An environment-friendly eluent for treating heavy metal-contaminated soil includes tetrasodium iminodisuccinate, nitric acid and water. Its content is: tetrasodium iminodisuccinate 0.18g; concentrated nitric acid 0.024g, water 999.796g. Its preparation method is:

[0014] 1. Weigh 0.18g of tetrasodium iminodisuccinate, add it into a plastic bucket, then add 999.796g of water into the plastic bucket, and stir with a stirrer for 15 minutes to completely dissolve the tetrasodium iminodisuccinate.

[0015] 2. Add 0.024g of concentrated nitric acid into the plastic bucket, and stir with a stirrer for 15 minutes to obtain 1kg of environment-friendly eluent for treating heavy metal-contaminated soil.

Embodiment 2

[0017] An environment-friendly eluent for treating heavy metal-contaminated soil includes tetrasodium iminodisuccinate, concentrated nitric acid and water. Its content is: tetrasodium iminodisuccinate 0.5kg; concentrated nitric acid 0.06kg, water 99.44kg. Its preparation method is:

[0018] 1. Weigh 0.5kg of tetrasodium iminodisuccinate, add it into a plastic bucket, then add 99.44kg of water into the plastic bucket, and stir with a stirrer for 15 minutes to completely dissolve the tetrasodium iminodisuccinate.

[0019] 2. Add 0.06 kg of concentrated nitric acid into the plastic bucket, and stir with a stirrer for 15 minutes to obtain 100 kg of environment-friendly eluent for treating heavy metal-contaminated soil.

Embodiment 3

[0021] An environment-friendly eluent for treating heavy metal-contaminated soil includes tetrasodium iminodisuccinate, concentrated nitric acid and water. Its content is: tetrasodium iminodisuccinate 0.36kg; concentrated nitric acid 0.048kg, water 1.99kg. Its preparation method is:

[0022] 1. Weigh 0.36kg of tetrasodium iminodisuccinate, add it into a plastic bucket, then add 1.99kg of water into the plastic bucket, and stir with a stirrer for 15 minutes to completely dissolve the tetrasodium iminodisuccinate.

[0023] 2. Add 0.048 kg of concentrated nitric acid to the plastic bucket, and stir with a stirrer for 15 minutes to obtain 2 kg of environment-friendly eluent for treating heavy metal-contaminated soil.

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Abstract

An environment-friendly eluent for treating heavy-metal-polluted soil comprises tetrasodium iminodisuccinate, concentrated nitric acid and water, wherein the mass ratio of each component after preparation is as following: tetrasodium iminodisuccinate 0.18-5 per mill, concentrated nitric acid 0.024-0.6 per mill, and water 994.4-999.796 per mill. The preparation method is as following: 1. putting tetrasodium iminodisuccinate with mass ratio 0.18-5 per mill into a plastic barrel, and adding water with mass ratio 994.4-999.796 per mill into the plastic barrel, then stirring the resultant by a stirrer for 10 min to have the tetrasodium iminodisuccinate fully dissolved; 2. adding concentrated nitric acid with mass ratio 0.024-0.6 per mill into the plastic barrel, and then stirring the resultant by a stirrer for 10 min to obtain the environment-friendly eluent for treating heavy-metal-polluted soil. By the invention, the eluent can restore heavy-metal-polluted soil and can be biodegraded completely without causing a second pollution.

Description

technical field [0001] The invention relates to polluted soil treatment technology, in particular to an environment-friendly eluent for treating heavy metal polluted soil. Background technique [0002] Soil is the material basis and environmental conditions for human survival and development. Soil pollution not only leads to crop yield reduction and agricultural product pollution, but also causes food safety problems of agricultural products; soil pollution can also lead to air and water environmental pollution. Since the 20th century, due to industrial activities (such as mining and smelting) and agricultural production (sewage irrigation, sludge, pesticides, fertilizers, etc.), a large amount of soil around the world has been polluted by heavy metals. At present, there are varying degrees of heavy metal pollution in soils all over the world. Among the 1,200 contaminated soils to be treated on the U.S. priority list, 60% are polluted by heavy metals. At present, the agricu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K17/40B09C1/08
Inventor 胡晓钧李玉双孙礼奇
Owner 河北协同化学有限公司
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