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A bioremediation method for polybrominated diphenyl ether-contaminated soil

A polybrominated diphenyl ether and bioremediation technology, which is applied in the field of phytoremediation of soil pollution and bioremediation of polybrominated diphenyl ether-contaminated soil, can solve the problems of low repair efficiency, high cost, secondary pollution, etc., achieve low cost, improve absorption and transfer rate , the effect of promoting growth

Active Publication Date: 2021-06-04
SHENZHEN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to overcome the above-mentioned deficiencies of the prior art, to provide a bioremediation method for polybrominated diphenyl ether-contaminated soil, to overcome the secondary pollution, low remediation efficiency and technical problems such as high cost

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  • A bioremediation method for polybrominated diphenyl ether-contaminated soil

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Embodiment 1

[0032] This embodiment provides a bioremediation method for PBDEs-contaminated soil, the specific method is as follows:

[0033] In 2017, the inventor collected the 0-5cm surface sediments from the natural mangroves in the eastern part of Hong Kong, which were less affected by human disturbance and pollution, and returned them to the experimental greenhouse. The initial pollution concentrations were 577.92±13ng g through experimental means. - 1 dw's BDE-99 (pentabromodiphenyl ether, a class of congeners of polybrominated diphenyl ethers) treats sediment. Then, the BDE-99 contaminated soil was divided into 4 remediation treatment experimental groups, namely the planting candela group, the combination group of candela + synergist, the no plant group, and the no plant + synergist combination group. The composition of the synergist is: NH 4 Cl, KNO 3 、Na 2 HPO 4 、C 6 h 12 o 6 and water; the configuration concentration is: NH 4 Cl (90mgL -1 ), KNO 3 (173mg L -1 ), Na 2...

Embodiment 2

[0035] This embodiment provides a bioremediation method for PBDEs-contaminated soil, the specific method is as follows:

[0036] In 2017, the inventor collected the 0-5cm surface sediments from the natural mangroves in the eastern part of Hong Kong, which were less affected by human disturbance and pollution, and returned them to the experimental greenhouse. The initial pollution concentration was 52.68±6.1μg g -1 dw's BDE-209 (decabromodiphenyl ether, a class of congeners of polybrominated diphenyl ethers) treats sediment. Similar to the BDE-99 pollution remediation treatment experiment, the BDE-209 contaminated soil was also divided into planting group, plant + synergist treatment group, no planting group, and no planting + synergist treatment group. The configuration and timing of synergists, as well as the frequency and time of post-observation are also consistent. The difference is that in the BDE-209 pollution treatment, in addition to the candela, another mangrove plan...

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Abstract

The invention discloses a bioremediation method for soil polluted by polybrominated diphenyl ethers. The bioremediation method includes the steps of: planting restoration plants on the area to be repaired with water level fluctuation conditions; applying polybrominated diphenyl ether degradation synergists to the area to be repaired; performing post-care management treatment on the restoration plants . The bioremediation method utilizes the degradation of polybrominated diphenyl ethers by microorganisms in roots of repaired plants and the absorption and transfer of polybrominated diphenyl ethers by plants themselves to achieve the purpose of restoration. At the same time, the water level fluctuation conditions in the area to be repaired create an alternating anaerobic and aerobic environment, so that the corresponding anaerobic and aerobic microorganisms that degrade high-brominated and low-high brominated PBDEs have suitable reaction environments. In addition, the cost of the bioremediation method of the present invention is relatively low, the repair process is highly sustainable, and it is suitable for large-area in-situ repair.

Description

technical field [0001] The invention belongs to the field of ecological and environmental protection sciences, in particular to the technical category of phytoremediation of soil pollution, and specifically relates to a bioremediation method for polybrominated diphenyl ether-contaminated soil. Background technique [0002] Since polybrominated diphenyl ethers (PBDEs) were added to electronic and household products as flame retardants in the 1960s, due to their good flame retardant efficiency, they have been widely used all over the world in the following decades. In recent years, with the rapid development of my country's economy and the rapidly updated electronics industry, there has been a huge amount of electronic product waste. Due to imperfect recycling and treatment methods, the accumulation and disposal areas of these e-waste are usually accompanied by high concentrations of PBDE pollution. According to reports, the content of PBDEs in the surface sediments of the Ma...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B09C1/10
CPCB09C1/105B09C2101/00
Inventor 韦萍萍周海超谭凤仪莎佳·法扎娜
Owner SHENZHEN UNIV