可吸附有机卤素（Adsorable Organic Halogens，AOX）是指可被活性炭吸附的有机卤代物，是一项综合性的环境污染指标。AOX的污染状况正逐渐被重视。环杭州湾区域工业发达，杭州湾海域污染严重，本文针对杭州湾海域的AOX污染进行了溯源和源减排工艺相关研究。通过对杭州湾海域连续3年的采样和监测，发现杭州湾海域海水中AOX浓度为140.6±45.6 ~716.1±62.3 μg/L，远高于已报道的其他海域海水中AOX浓度；杭州湾海域表层沉积物中AOX含量为11.3±2.4~112.7±7.2 mg/kg，略低于芬兰湾附近海域沉积物中AOX含量。研究了处理量占环杭州湾污水处理总量64.7%的11座大型污水处理厂的AOX排放特征，发现：环杭州湾区域每年至少通过污水厂向杭州湾排放645.4 t AOX，某精细化工园区独占21.3%；工业废水是水中AOX的重要来源，不同工业废水中又以制药废水中AOX含量普遍较高（2.8~612.5 mg/L），是此前未被重视的含有高浓度AOX的行业废水。采用A/A/O系统对含有高浓度AOX的制药废水进行处理，在总HRT为62.5 h，混合液回流比R=2，好氧段DO=3~4 mg/L的条件下，系统对AOX、COD、NH3-N、TN的去除率分别达到73.1±11.2%、87.7±24.5%、99.1±0.5%、73.4±12.1%，但出水水质难以满足相关标准；通过生物电化学工艺强化厌氧段对AOX的去除效果，发现：当阴极电位极化至-1000 mV时，厌氧段AOX的去除率提高至75.2%；其出水再经生物处理后，AOX浓度降至100 mg/L左右；对好氧工艺出水进行Fenton氧化处理后，出水中各项指标均能满足相关标准。构建厌氧微系统，对制药废水中普遍存在的四氯苯类物质的生物脱氯过程进行研究。发现：在构建的微系统中，三种四氯苯均能被脱氯至二氯苯；四氯苯分子上取代氯脱除的优先级别是：双侧取代氯>单侧取代氯>单独取代氯。采用高通量测序技术对厌氧微生物群落进行分析发现：A/A/O厌氧段污泥 (FYQ)，BER阴极污泥 (BE)，厌氧微系统污泥 (MC)中具有脱氯功能的菌群丰度分别为43.91%，46.63%，38.35%，主要脱氯菌群均为Desulfovibrio，Dehalobacter，Dehalococcoides，Desulfomicrobium，Geobacter，Desulforhabdus六个属。

Adsorable Organic Halogens (AOX) is a sum indicator deteming the total amount of organically bound halogens in the environment. The AOX discharge was attached increasing attention. The Hangzhou Bay was arounded by tens of large industrial park, which made the Hangzhou Bay become one of the most polluted areas in China.This study focused on the contamination status, the source tracing and the removal technology of the AOX in the Hangzhou Bay.AOX concentration in samples collected from the Hangzhou Bay in 2014, 2015 and 2016 was detected to understand the AOX contamination status of the Bay. The result showed that seawater of the Hangzhou Bay contains 140.6±45.6~716.1±62.3 μg/L AOX, which was much higher than the concentrations reported in other areas indicating that the Hangzhou Bay was seriously polluted by AOX. However, the AOX content in the sediment, 11.3±2.4~112.7±7.2 mg/kg, was relatively lower than that detected in the sediment of Finland Bay. 11 WWTPs were selected as important terrestrial point sources of pollutants of the Hangzhou Bay to understand the contribution of the AOX from the terrestrial source since the capacity of those WWTPs covered 64.7% of the total capacity of all WWTPs around the Hangzhou Bay, The results showed that industrial wastewater was the main source of AOX while the demostic wastewater was not. Over 645.5 t AOX was discharged into the Hangzhou Bay from those WWTPs, of which the WWTP Ⅸ, treating the wastewater from a national industrial park, covered 21.3%. The AOX detection of 20 factories of 4 main industries of the park showed that the pharmaceutical wastewater was an AOX polluted wastewater containing 2.8~612.5 mg/L AOX which was higher than other wastewater.The A/A/O system was used to treat the selected AOX-bearing pharmaceutical wastewater. The results showed that the system could achieve a removal efficiency of 73.1±11.2%，87.7±24.5%，99.1±0.5%，73.4±12.1% for AOX, COD, NH3-N and TN, respectively, under the optimal operation parameter, total HRT of 62.5 h, the reflux ratio of 2 and DO of 3-4 mg/L. Electric was employed to enhance the AOX removal effect of the anerobic process. The results showed that the AOX removal efficiency was enhaced to 75.2% when the cathode was polarized to -1000 mV, and the AOX could be further reduced to 100 mg/L when the effluent was treated by the aerobic process. Nonetheless, the AOX still couldnot match the standard, thus the Fenton process was used to treat the effluent of aerobic process to make sure the AOX concentration could be reduced to lower than 8 mg/L which matched the standard of the park as well as TOC.The tetrachlorbenzene (TeCB) was selected as a typical AOX compound in the pharmaceutical wastewater and treated in the anaerobic microcosm. It was found that the TeCBs could be reduced to dichlorbenzene in the microcosm. The double flanked chlorine was the easiest one to be removed and the isolate chlorine was the hardest one. The microbial community morphology and structure of anaerobic sludge was studied. The abundance of the microorganism having a function of dehalogenation was 43.91%, 46.63% and 38.35% in sludge from anaerobic process of A/A/O, BER (BE) and microcosm (MC), respectively. The structure of community was similar, the Desulfovibrio，Dehalobacter，Dehalococcoides，Desulfomicrobium，Geobacter，Desulforhabdus were the most important dehalogenation bacteria.