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A device and method for remediating groundwater by fe(ii) activated sodium persulfate method

A sodium persulfate, groundwater technology, applied in chemical instruments and methods, oxidized water/sewage treatment, water pollutants, etc., can solve problems such as difficult biodegradation, water environment and biological threats, and achieve simple materials and no defects. Environmental impact, effect of enhancing activation efficiency

Active Publication Date: 2017-04-05
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

CBZ is difficult to be biodegraded in water bodies, long-term accumulation will pose a potential threat to the water body environment and organisms

Method used

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  • A device and method for remediating groundwater by fe(ii) activated sodium persulfate method
  • A device and method for remediating groundwater by fe(ii) activated sodium persulfate method
  • A device and method for remediating groundwater by fe(ii) activated sodium persulfate method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] As shown in Figure 1, the device consists of three parts of reaction vessel columns to form a semi-continuous in-out reaction device. The bottom of the column of the first part of the reaction vessel is connected to a closed container filled with 0.01-0.1mM simulated pollutant carbamazepine (CBZ) solution, and the upper end is connected to the lower end of the column of the second part of the reaction vessel, and the slow-release material is placed in it, and The release of SPS begins upon contact of the solution. The upper end of the column of the second part of the reaction vessel is connected to the bottom of the column of the third part of the reaction vessel, and the bottom of the column of the third part of the reaction vessel is connected to a freshly prepared Fe 2+ The closed container of the solution, by controlling the peristaltic pump, different flow rates of Fe 2+ The solution is input to the column of the third part of the reaction vessel, the upper end of...

Embodiment 2

[0035] Using the device described in Example 1, the slow-release material B releases SPS covered by Fe 2+ The degradation effect on CBZ after activation simulates the ISCO repair technology. Material B paraffin: quartz sand: SPS is 10:1:4. Anyway, the conditions are shown in Table 2. The concentration of pollutants (CBZ) was 0.02mMol / L, and the reaction time was 24 h. Fe 2+ The concentration is controlled at 50mg / L. Sodium citrate is 10mg / L.

[0036] Table 2 Reaction conditions of sustained-release material B

[0037] label B1 B2 B3 B4 B5 Quantity (block) 1 1 1 2 2 Flow rate (mL / min) 8 8 4 8 4 Sodium citrate none Have Have Have Have

[0038] It can be seen from Figure 3 that it reflects the degradation of continuous CBZ in the device by paraffin slow-release materials under different conditions. Similar to the degradation trend of cement slow-release materials, when double slow-release materials are added and the inp...

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Abstract

The invention relates to a device and a method for repairing underground water through a process of activating sodium persulfate by using Fe (II). The device is a semi-continuous inlet / outlet type reaction device consisting of three parts. A first part is connected with a water sample, simulates a soil water-containing layer of underground water and controls flow rate. A second part therein is provided with a slow-release material and releases sodium persulfate when being in contact with solution. A third part is connected with the second part and Fe<2+> solution and controls activation reaction of each component. A sampling valve is arranged in the middle of a column of each part, and the water sample can be collected and is used for analyzing concentration of pollutants, concentration of S2O8<2->, concentration of Fe<2+> and pH of solution after reaction. The device and the method for repairing underground water through the process of activating sodium persulfate by using Fe (II) have a better effect of treating organic matters which are difficult to dissolve, and a model has a function of simulating large-scale application.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and relates to a restoration technology of polluted groundwater, in particular to a device and method for restoring groundwater by Fe(II) activated sodium persulfate method. Background technique [0002] As a typical representative of PPCPs, the antiepileptic drug Carbamazepine (CBZ) has attracted worldwide attention due to its huge usage and difficult-to-degrade material properties. According to reports, CBZ has been commonly detected in groundwater in many areas, and its concentration can be as high as 155ng / L. CBZ is difficult to be biodegraded in water bodies, and long-term accumulation will pose a potential threat to the water body environment and organisms. Therefore, it is imminent to solve the pollution problem of CBZ in groundwater. In recent years, people have begun to study the use of in situ chemical oxidation (ISCO) to remediate organic pollutants in groundwater an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/00C02F1/72C02F101/34C02F101/38
Inventor 代朝猛周雪飞张亚雷钱冬旭张勤
Owner TONGJI UNIV
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