Degradation of Polybrominated Aiphenyl Ethers in a UV Advanced Reduction Process with Different Reducing Agents

3rd International Conference on Advances in Energy Resources and Environment Engineering

能源学;生态环境科学

Dong, Xiaoqing^1 ; Li, Chaolin^2 ; Zheng, Wei^2 ; Wang, Guosheng^1

School of Traffic and Environment, Shenzhen Institute of Information Technology, Shenzhen

518172, China^1

Environmental Science and Engineering Research Center, Shenzhen Graduate School, Harbin Institute of Technology, Shenzhen

518055, China^2

关键词: Decabromodiphenyl ethers (BDE209);    Enhanced effects;    First-order kinetic models;    Kinetic analysis;    Photochemical process;    Photochemical systems;    Polybrominated diphenyl ether (PBDEs);    Reduction process;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/113/1/012035/pdf
DOI  :  10.1088/1755-1315/113/1/012035

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

Polybrominated diphenyl ethers (PBDEs) are toxic and persistent, and their efficient degradation is currently a challenge. In this study, decabromodiphenyl ether (BDE-209) was selected as the target compound and was degraded by a UV photochemical system with different reducing agent. The result showed that the optimal BDE-209 removal in 1 hour by UV/sodium sulphite (Na2SO3) was 86.87%. With the same concentration of BDE-209 and reaction time, the optimal removal rate by UV/sodium borohydride (NaBH4) was 89.25%. Kinetic analysis revealed that the degradation of BDE-209 conformed to the first-order kinetic model. The order of rate constant of different UV photochemical processes is kUVUV/Na2SO3UV/NaBH4. Debromination rate indicated that reducing agents can promote the removal of bromine during the degradation of BDE-209. As a reducing agent, sodium borohydride showed a better enhanced effect for the removal of bromines.