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Method for remediating soil organically polluted by chlorobenzene based on enhanced adsorption and fixation by surfactant

A surfactant and organic pollution technology, applied in the field of soil pollution control, can solve problems such as low repair efficiency, complicated operation, and long repair cycle

Active Publication Date: 2017-01-11
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem mainly solved by the present invention: Aiming at the shortcomings of the current traditional adsorption fixation method for repairing chlorobenzene-contaminated soil, the repair efficiency is low, the required repair period is long, and the operation is complicated, a surfactant for enhancing the adsorption and fixation of soil organically polluted chlorobenzene is provided. Repair method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0008] Weigh 400g of tea seed cake, put it into a corundum mortar, grind it for 1-2 hours, pass through a 100-mesh standard sieve to obtain tea seed cake powder, then put the tea seed cake powder into an oven, and dry it at 60-70°C for 5-6 hours Take it out to get the pretreated tea seed cake powder; mix the above pretreated tea seed cake powder and petroleum ether at a solid-to-liquid ratio of 1:3, put it into an ultrasonic extractor, and extract it ultrasonically for 20-30 minutes with a power of 200-300W. Filter and separate to obtain the filter residue, rinse the filter residue with deionized water for 20-30 minutes, and dry to obtain the defatted tea seed cake; mix the above defatted tea seed cake and anhydrous methanol at a volume ratio of 1:6 and put it into a Soxhlet extractor , heat up to 60-70°C, heat and reflux at a rate of 11-13 min / time for 2-3 hours, and collect the extract; put the above-mentioned extract into a vacuum distillation device, and recover methanol by...

example 2

[0010] Weigh 400-500g of tea seed cake, put it into a corundum mortar and grind it for 1-2 hours, pass through a 100-mesh standard sieve to obtain tea seed cake powder, then put the tea seed cake powder into an oven, and dry at 60-70°C for 5- Take it out after 6 hours to obtain pretreated tea seed cake powder; mix the above pretreated tea seed cake powder and petroleum ether at a solid-to-liquid ratio of 1:3, put it into an ultrasonic extractor, and use 200-300W power for ultrasonic extraction of 20- After 30 minutes, filter and separate to obtain the filter residue, rinse the filter residue with deionized water for 20-30 minutes, and obtain the degreased tea seed cake after drying; mix the above degreased tea seed cake and anhydrous methanol at a volume ratio of 1:6 and put it into a Soxhlet pump In the extractor, heat up to 60-70°C, heat and reflux at a rate of 11-13min / time for 2-3h, and collect the extract; put the above-mentioned extract into a vacuum distillation device, ...

example 3

[0012] Weigh 400-500g of tea seed cake, put it into a corundum mortar and grind it for 1-2 hours, pass through a 100-mesh standard sieve to obtain tea seed cake powder, then put the tea seed cake powder into an oven, and dry at 60-70°C for 5- Take it out after 6 hours to obtain pretreated tea seed cake powder; mix the above pretreated tea seed cake powder and petroleum ether at a solid-to-liquid ratio of 1:3, put it into an ultrasonic extractor, and use 200-300W power for ultrasonic extraction of 20- After 30 minutes, filter and separate to obtain the filter residue, rinse the filter residue with deionized water for 20-30 minutes, and obtain the degreased tea seed cake after drying; mix the above degreased tea seed cake and anhydrous methanol at a volume ratio of 1:6 and put it into a Soxhlet pump In the extractor, heat up to 60-70°C, heat and reflux at a rate of 11-13min / time for 2-3h, and collect the extract; put the above-mentioned extract into a vacuum distillation device, ...

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Abstract

The invention relates to a method for remediating soil organically polluted by chlorobenzene based on enhanced adsorption and fixation by a surfactant, and belongs to the field of soil pollution abatement. The method comprises the following steps: extracting a natural biodegradable biological surfactant saponin from tea-seed cakes through such procedures as extraction and degreasing, methanol extraction, as well as concentration and drying; compounding the extracted surfactant with zeolite, and then adding the obtained compound into the to-be-treated soil; and after watering and mixing, carrying out standing for adsorption and fixation. The method provided by the invention has the advantages that the adsorption and fixation functions of zeolite can be enhanced by utilizing the emulsification and desorption functions of the surfactant; the operation is simple and convenient and the remediation efficiency is high; and the large-scale popularization and utilization can be achieved.

Description

technical field [0001] The invention relates to a repair method for surface active agent enhanced adsorption and fixation of soil organically polluted chlorobenzene, and belongs to the field of soil pollution control. Background technique [0002] After organic pollutants enter the soil, they are easily adsorbed by soil solid phase, especially soil organic matter, and their bioavailability is very low. Degradable surfactants can be used to emulsify, desorb and regulate the interaction between microbial cell surfaces, pollutants and environmental media. The bioavailability of organic pollutants such as interface interaction, thereby enhancing the bioremediation effect of organic polluted soil. Surfactants can transfer organic matter from the solid phase of the soil to the mobile phase I, improve the bioavailability of organic matter, make it easier to be biodegraded, and achieve the purpose of removing organic pollutants I. However, some surfactants cannot be completely biod...

Claims

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Application Information

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IPC IPC(8): B09C1/00
CPCB09C1/00
Inventor 赵远孙向武孙辰鹏杨泽平陈江杰殷鸿洋张念慈顾建谢寅徐腾聂莉戴江吴彬
Owner CHANGZHOU UNIV
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