Microplastics and Wastewater Treatment Plants—A Review

The emission of microplastics into nature poses a threat to aquatic and terrestrial ecosystems. Their penetration of the food chain presents a danger to human health as well. Wastewater treatment plants can be seen as the last barrier between microplastics and the environment. This review focuses on the impact of waste treatment plants in retaining microplastics. Studies show that no wastewater treatment method leads to a complete retention of microplastics, and so wastewater treatment plants themselves are viewed as point sources for the discharge of microplastics into the aquatic environment. Problems associated with the utilization of microplastic loaded sewage sludge are also discussed in the review.

辐射技术在废水及污泥处理中的应用

综述了国内外在用辐射技术处理废水及污泥方面的研究概况．其中包括工业废水中酚、氰化物、木质素、重金属的去除及染料脱色；各种饮用水（如地面水、医院废水、畜牧场废水等）的消毒处理，污泥辐射处理的研究及实际应用等．

污泥-兰炭末基成型活性炭的制备及吸附性能研究

采用H_2SO_4和ZnCl_2复合活化法,以脱水污泥和兰炭末为原料制备了污泥-兰炭末基成型活性炭,通过FTIR、BET及TG对产物进行了表征和性能测试,研究了pH值、固液比和吸附时间对其处理兰炭废水效果的影响,并进行了成型活性炭的再生性能测试。单因素和正交实验结果表明:影响成型活性炭碘吸附值的因素由大到小依次为活化温度>活化时间>浸渍比(污泥和兰炭末混合物质量与活化剂溶液体积比)。最佳制备工艺条件为活化温度750℃、活化时间2 h、浸渍比1∶2.5。制备的成型活性炭平均孔径约9 nm,比表面积约194 m^2/g,且结构中含有烷烃、芳烃等多种类型的烃类及醇和酚等含氧官能团。兰炭废水处理结果表明:当pH≈8、固液比(成型活性炭质量与兰炭废水体积比)1∶30、吸附时间32 h,氨氮去除率和色度去除率分别约为83%、42%,成型活性炭经5次再生后,碘吸附值和抗压强度分别降低了31%和62%。

煤化工废水“零排放”技术进展

介绍了煤化工污水水质特点及指标,污水处理的基本工艺流程及技术进展。从污水处理角度讨论了煤化工发展的必要条件。

焦化污水的危害及处理

焦化含酚、氰污水的来源很广,对水源污染严重,焦化污水必须加以处理,合格后才能排放。