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Remediation method for DDT polluted soil

A technology of polluted soil and remediation method, applied in the remediation of DDT-contaminated soil and the field of soil remediation, can solve the problems of shortened remediation time, poor remediation effect, and cumbersome remediation method process, so as to achieve good remediation effect, reduce remediation time, and improve The effect of efficiency

Active Publication Date: 2015-04-29
JIANGSU GAIYA ENVIRONMENTAL SCI & TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004]Technical problem to be solved: Most of the remediation methods for DDT-contaminated soil are relatively complicated, and the remediation methods include microbial remediation, biological enzyme remediation, etc., the above-mentioned The repairing method process is loaded down with trivial details, and its repairing effect is also relatively poor, and the purpose of the present invention is to provide a kind of logistics repairing method of novel DDT polluted soil, improve the efficiency of its repairing, shorten repairing time

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] (1) Measure the humidity in the DDT-contaminated soil. After measuring the humidity, put the DDT-contaminated soil into the bioreactor and add pure water to it. The weight ratio of the added pure water to the DDT-contaminated soil is 10:1. Stir for 30 minutes; (2) Ultrasonicate the suspension in the bioreactor with an ultrasonic power of 400w, add magnesium hydroxide and hydroxyapatite at the same time of ultrasonication, add calcium hydroxide and hydroxyapatite, and then stir for 2 hours. The weight of magnesium hydroxide is 3wt% of the weight of DDT-contaminated soil, and the weight of hydroxyapatite is 8wt% of the weight of DDT-contaminated soil; (3) Add gellan gum to the bioreactor at the same time as ultrasound, and stir for 30 minutes after adding gellan gum , the weight of gellan gum is 9wt% of the weight of the DDT-contaminated soil; (4) ultrasonically add tea saponin to the bioreactor at the same time. Stop stirring, let the suspension in the bioreactor stand s...

Embodiment 2

[0020] (1) Measure the humidity in the DDT-contaminated soil. After measuring the humidity, put the DDT-contaminated soil into the bioreactor and add pure water to it. The weight ratio of the added pure water to the DDT-contaminated soil is 5:1. Stir for 30 minutes; (2) Ultrasonicate the suspension in the bioreactor with an ultrasonic power of 200w, add magnesium hydroxide and hydroxyapatite at the same time of ultrasonication, add calcium hydroxide and hydroxyapatite, and then stir for 1 hour. The weight of magnesium hydroxide is 6wt% of the weight of DDT-contaminated soil, and the weight of hydroxyapatite is 4wt% of the weight of DDT-contaminated soil; (3) ultrasonically add gellan gum to the bioreactor at the same time, and stir for 30 minutes after adding gellan gum , the weight of gellan gum is 5wt% of the weight of the DDT-contaminated soil; (4) ultrasonically add tea saponin to the bioreactor at the same time. Stop the stirring, let the suspension in the bioreactor stan...

Embodiment 3

[0022] (1) Measure the humidity in the DDT-contaminated soil. After measuring the humidity, put the DDT-contaminated soil into the bioreactor, add pure water to it, and the weight ratio of the added pure water to the DDT-contaminated soil is 6:1. Stir for 30 minutes; (2) Ultrasonicate the suspension in the bioreactor with an ultrasonic power of 250w, add magnesium hydroxide and hydroxyapatite at the same time of ultrasonication, add calcium hydroxide and hydroxyapatite, and then stir for 2 hours. The weight of magnesium hydroxide is 5wt% of the weight of the DDT-contaminated soil, and the weight of hydroxyapatite is 5wt% of the weight of the DDT-contaminated soil; (3) ultrasonically add gellan gum to the bioreactor at the same time, and stir for 30 minutes after adding the gellan gum , the weight of gellan gum is 6wt% of the weight of the DDT-contaminated soil; (4) ultrasonically add tea saponin to the bioreactor at the same time. Stop stirring, let the suspension in the biore...

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Abstract

The invention belongs to the field of soil remediation and discloses a remediation method for DDT polluted soil. The remediation method for the DDT polluted soil comprises the following steps: (1) determining the humidity of the DDT polluted soil; after determining the humidity, putting the DDT polluted soil into a bioreactor; adding pure water into the bioreactor and stirring at a room temperature for 30 minutes; (2) carrying out ultrasonic treatment on turbid liquid in the bioreactor and adding magnesium hydroxide and hydroxyapatite during the ultrasonic treatment; (3) in the process of the ultrasonic treatment, adding gellan gum into the bioreactor and stirring for 30 minutes after the gellan gum is added; and (4) in the process of the ultrasonic treatment, adding tea saponin into the bioreactor and stirring; stopping stirring and standing the turbid liquid in the bioreactor; separating upper-layer liquid from lower-layer soil; and airing the lower-layer soil to obtain the remediated DDT polluted soil.

Description

technical field [0001] The invention belongs to the field of soil remediation, and relates to a method for remediating soil, in particular to a method for remediating DDT-contaminated soil. Background technique [0002] DDT was once one of the widely used insecticides. It has stomach poisoning and contact killing effects, and can be processed into powder, emulsion or oil for use. It is not easy to be degraded into non-toxic substances, and it is easy to cause accumulation during use and pollute the environment. DDT residues in plants can enter human and animal bodies through the "food chain" or other channels, deposit poisoning, and affect human health. DDT poisoning may cause symptoms such as headache, dizziness, weakness, sweating, insomnia, nausea, vomiting, and occasional hand and finger muscle twitching and tremor. Severe poisoning is often accompanied by high fever, sweating, vomiting, and diarrhea; excited nervous system, tonic convulsions of upper, lower limbs, an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/00B09C1/08
Inventor 程功弼詹晓倩
Owner JIANGSU GAIYA ENVIRONMENTAL SCI & TECH CO LTD
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