Consortium on Health, Environment, Education and Research (CHEER), and Department of Science and Environmental Studies, The Hong Kong Institute of Education, Tai Po, Hong Kong, China; State Key Laboratory in Marine Pollution - Croucher Institute for Environmental Sciences, Hong Kong Baptist University and City University of Hong Kong, Kowloon Tong, Hong Kong, China.
State Key Laboratory in Marine Pollution - Croucher Institute for Environmental Sciences, Hong Kong Baptist University and City University of Hong Kong, Kowloon Tong, Hong Kong, China; Department of Geography, Hong Kong Baptist University, Kowloon Tong, Hong Kong, China.
Sci Total Environ. 2015 Feb 1;505:261-8. doi: 10.1016/j.scitotenv.2014.09.070. Epub 2014 Oct 15.
This study was to investigate removal efficiencies and profiles of 14 polybrominated diphenyl ether (PBDE) congeners by two different types of sewage treatment work (STW) in Hong Kong: Stonecutters Island STW (SCISTW) which uses chemically enhanced primary treatment (CEPT) process and Sha Tin STW (STSTW) which adopts biological treatment. The results indicated that both SCISTW and STSTW had a high total removal efficiency for BDE-47, BDE-99 BDE-209 and total PBDEs (SCISTW: 71.6 ± 15.8, 84.7 ± 12.3, 96.0 ± 2.62 and 87.4 ± 8.02%, respectively; STSTW: 74.8 ± 9.5, 90.7 ± 9.14, 96.2 ± 2.41 and 89.3 ± 2.62%, respectively) and PBDEs were chiefly removed by sorption. However, the profile of PBDEs demonstrated that the relative proportions of BDE-28 and BDE-47 in total PBDEs markedly increased, while that of BDE-209 decreased in the effluent samples of the two sewage treatment works, especially in STSTW. The percentage of BDE-209 in total PBDEs in effluent (49.3%) of SCISTW was 21.2% lower than that in influent (70.5%), and the percentage of BDE-209 in total PBDEs in effluent (13.8%) of STSTW was 34.1% reduced from influent (47.9%). Despite overall removal, the percentage of BDE-47 in total PBDEs in effluent (17.6%) of SCISTW was 6.85% higher than that in influent (10.7%), and the percentage of BDE-47 in total PBDEs in effluent (33.5%) of STSTW was 18.1% increased from influent (16.8%). The increase in proportion of BDE-47 in the effluent might raise environmental and public health concerns. Our study is a first attempt in reporting the PBDE congener profiles in different phases of sewage treatment.
本研究旨在考察两种不同类型的香港污水处理厂（污水处理厂）对 14 种多溴二苯醚（PBDE）同系物的去除效率和分布情况：使用化学增强一级处理（CEPT）工艺的昂船洲污水处理厂（SCISTW）和采用生物处理的沙田污水处理厂（STSTW）。结果表明，SCISTW 和 STSTW 对 BDE-47、BDE-99、BDE-209 和总 PBDEs 的总去除效率均较高（SCISTW：71.6±15.8、84.7±12.3、96.0±2.62 和 87.4±8.02%，分别；STSTW：74.8±9.5、90.7±9.14、96.2±2.41 和 89.3±2.62%，分别），而 PBDEs 主要通过吸附去除。然而，PBDEs 的分布情况表明，在两个污水处理厂的出水样品中，BDE-28 和 BDE-47 在总 PBDEs 中的相对比例明显增加，而 BDE-209 的比例则降低。SCISTW 进水（70.5%）中 BDE-209 在总 PBDEs 中的百分比比出水（49.3%）低 21.2%，而 STSTW 进水（47.9%）中 BDE-209 在总 PBDEs 中的百分比比出水（13.8%）低 34.1%。尽管总体去除率较高，但 SCISTW 出水（17.6%）中 BDE-47 在总 PBDEs 中的百分比比进水（10.7%）高 6.85%，而 STSTW 出水（33.5%）中 BDE-47 在总 PBDEs 中的百分比比进水（16.8%）高 18.1%。出水中 BDE-47 比例的增加可能会引起环境和公共卫生方面的关注。本研究首次报道了不同污水处理阶段的 PBDE 同系物分布情况。
