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Method for removing chlorobenzene from underground water through nanosolid superbase-activated sodium persulfate

A solid super alkali, sodium persulfate technology, applied in chemical instruments and methods, oxidized water/sewage treatment, water pollutants and other directions, to achieve significant oxidation treatment effect, the effect of simple production process

Active Publication Date: 2014-11-05
JIANGSU SUNTIME ENVIRONMENTAL REMEDIATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are few reports on the method of removing chlorobenzene in groundwater by activating sodium persulfate with solid super alkali

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Weigh 0.5g sodium dodecylbenzenesulfonate (SDBS) and dissolve it in 50mL distilled water, then weigh 0.118g calcium nitrate (Ca(NO 3 ) 2 4H 2 O) and 0.128g magnesium nitrate (Mg(NO 3 ) 2 ·6H 2 O) is dissolved therein to obtain solution a. 1% sodium hydroxide (NaOH) aqueous solution was added dropwise to the solution a and continuously stirred for 2 hours, then left to age for 4 hours, and then baked in a reaction kettle at 150° C. for 48 hours. After the reaction was finished, cool to room temperature, centrifuge, and the precipitate was washed with water until the washing liquid was neutral, then washed with ethanol (C 2 h 5OH) extraction and washing, and then dried in an oven at 110°C for 24h. Then take out the dried sample and grind it, put it in the muffle furnace again, under N 2 Calcined at 650°C for 2 hours under atmosphere to obtain the nano-solid super alkali activator.

[0031] At room temperature, take 0.1 g of the prepared activator and 0.2 g of sod...

Embodiment 2

[0033] Weigh 2.5g sodium dodecylbenzenesulfonate (SDBS) and dissolve it in 50mL distilled water, then weigh 0.59g calcium nitrate (Ca(NO 3 ) 2 4H 2 O) and 1.92g magnesium nitrate (Mg(NO 3 ) 2 ·6H 2 O) is dissolved therein to obtain solution a. Add 1% sodium hydroxide (NaOH) aqueous solution dropwise to solution a and continue to stir for 2 hours, then let it stand for aging for 4 hours, and then place it in a reaction kettle at 250° C. for 24 hours. After the reaction was finished, cool to room temperature, centrifuge, and the precipitate was washed with water until the washing liquid was neutral, then washed with ethanol (C 2 h 5 OH) extraction and washing, and then dried in an oven at 110°C for 24h. Then take out the dried sample and grind it, put it in the muffle furnace again, under N 2 Calcined at 650°C for 2 hours under atmosphere to obtain the nano-solid super alkali activator.

[0034] Under room temperature conditions, take 0.6g of the prepared activator and ...

Embodiment 3

[0036] Weigh 4g sodium dodecylbenzenesulfonate (SDBS) and dissolve it in 50mL distilled water, then weigh 0.118g calcium nitrate (Ca(NO 3 ) 2 4H 2 O) and 6.41g magnesium nitrate (Mg(NO 3 ) 2 ·6H 2 O) is dissolved therein to obtain solution a. 1% sodium hydroxide (NaOH) aqueous solution was added dropwise to the solution a and continuously stirred for 4 hours, then left to age for 8 hours, and then baked in a reaction kettle at 250° C. for 12 hours. After the reaction was finished, cool to room temperature, centrifuge, and the precipitate was washed with water until the washing liquid was neutral, then washed with ethanol (C 2 h 5 OH) extraction and washing, and then dried in an oven at 110°C for 24h. Then take out the dried sample and grind it, put it in the muffle furnace again, under N 2 Calcined at 650°C for 2 hours under atmosphere to obtain the nano-solid super alkali activator.

[0037] Under room temperature conditions, take the prepared activator 0.06g and 0.3...

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PUM

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Abstract

The invention discloses a method for removing chlorobenzene from underground water through nanosolid superbase-activated sodium persulfate. The method concretely comprises the following steps: feeding a nanosolid superbase activator and sodium persulfate into chlorobenzene-polluted underground water so as to conduct oxidization reaction, thus realizing the restoration of the chlorobenzene-polluted underground water. The prepared nanoscale solid superbase can enable aquifer media to fast, effectively and uniformly to achieve a strong basic environment, so that not only can the basic activation condition be continuously maintained, but also sulfate free radical (SO4<->) and hydroxyl free radical (OH) which have strong oxidative activity can be achieved through base-activated sodium persulfate so as to reach the obvious oxidization treatment effect on the chlorobenzene in the underground water, and the oxidization products have no secondary pollution on the underground water. The nanosolid superbase activator not only is low in the cost of raw materials, and environment-friendly, but also is simple and convenient in manufacturing process.

Description

technical field [0001] The invention belongs to the technical field of in-situ chemical oxidation in the field of groundwater pollution restoration and treatment. Specifically, the invention relates to a method for removing chlorobenzene in groundwater by using sodium persulfate activated by nanometer solid superalkali. Background technique [0002] Groundwater is an important fresh water resource, and 61% of cities in the country use groundwater as a source of drinking water. In recent years, due to human factors such as industrial development, the quality of groundwater in some areas has deteriorated seriously. Chlorobenzene (C 6 h 5 Cl), as the simplest chlorinated aromatic hydrocarbon, is an important chemical raw material and organic solvent, and is widely used in industries such as chemical industry and printing. Chlorobenzene is one of the most common groundwater organics due to leaks caused by operator error and improper disposal of waste liquids. Moreover, chlor...

Claims

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Application Information

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IPC IPC(8): C02F1/72C02F101/36
Inventor 孙进唐晓声胡波李玲薛丹
Owner JIANGSU SUNTIME ENVIRONMENTAL REMEDIATION
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