Environmental and Nano Science Group, Department of Chemistry, University of the Western Cape, Cape Town, South Africa.
Environmental and Nano Science Group, Department of Chemistry, University of the Western Cape, Cape Town, South Africa; Department of Chemistry, Faculty of Science, Lagos State University, LASU, P.O. Box 0001, Ojo, Lagos, Nigeria.
Sci Total Environ. 2021 Jul 15;778:146057. doi: 10.1016/j.scitotenv.2021.146057. Epub 2021 Feb 25.
During 2017 the herbicides alachlor, atrazine, butachlor, metolachlor, and simazine were detected in water samples, beach sediments and marine biota collected at Camps Bay, Cape Town, South Africa. During that period, the annual rain catchment record was 77,000 m, whereas the volume of chemically laden sewage discharged via the marine outfall was 693,500 m making the marine sewage outfall by far the most predominant source for these herbicides in the bay. The chemical load in the discharged sewage was not removed by the applied pre-treatment step, which only uses a 3 mm screen to eliminate plastic, paper, rags and other foreign materials. After passing through the Camps Bay pump station, the sewage is released to the bay at the following GPS position 33°56'42.214″ S 18°21'59.257″ E (Colenbrander et al., 2021) and at a discharge depth of 23 m and 1497 m from the beach. In our study the presence in marine biota of atrazine and simazine were taken as being indicative of the chemical signature of the sewage being released through the outfall, since these compounds were detected previously in the sewage prior to discharge. To our knowledge, our studies of the herbicides in diverse benthic organisms found in the near shore environment of Camps Bay are the first of their kind for this Western Cape region.
2017 年，在南非开普敦坎普斯湾采集的水样、海滩沉积物和海洋生物中检测到了莠去津、莠灭净、丁草胺、异丙甲草胺和西玛津等除草剂。在此期间，年降雨量为 77000 立方米，而通过海洋排污口排放的含化学物质的污水量为 693500 立方米，因此海洋排污口是该海湾这些除草剂的最主要来源。排放的污水中的化学负荷没有被应用的预处理步骤去除，该预处理步骤仅使用 3 毫米的筛网来去除塑料、纸张、碎布和其他异物。经过坎普斯湾泵站后，污水在以下 GPS 位置 33°56'42.214″ S 18°21'59.257″ E（Colenbrander 等人，2021 年）释放到海湾，排放深度为 23 米，距离海滩 1497 米。在我们的研究中，海洋生物中莠去津和西玛津的存在被认为是通过排污口释放的污水的化学特征的指示，因为这些化合物在排放前已经在污水中被检测到。据我们所知，我们对坎普斯湾近岸环境中各种底栖生物中除草剂的研究是该西开普省此类研究中的首例。
