Monitoring of organochlorine pesticides (OCP), polychlorinated biphenyls (PCB) and polycyclic aromatic hydrocarbons (PAH) in surface waters, sediments and aquatic lives of the benthic layer from different water systems of Ukraine was carried out. Information about the levels of these organic contaminants was collected, summarized and presented according to universally accepted regulatory standards that determine the toxicity of compounds of these classes. Regularities of variations of ecotoxicants concentrations in five water systems of the Dnipro river and the Black Sea (Dnipro-Bug estuary, the Danube delta, Balaklava bay, Sevastopol bay) were established. It was found that in many bottom sediment samples the recorded levels of OCP, PCB, and PAH exceed the values of TEC (Threshold Effect Concentration) and PEC (Probable Effect Concentration). To assess the toxicity of hydrobionts, the content of OCP and PCB is given as relative to the toxicity equivalent factor (TEF) and toxicity equivalent (TEQ). The levels of PCB in hydrobionts are presented relative to TEQ and indicate that hydrobionts of the bottom layer are significantly contaminated with compounds of OCP and PCB and thus bioconcentration of such organic contaminants by high organisms along the trophic chain is possible.

中文翻译：

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水系统中有机生态毒物的化学监测

监测了来自乌克兰不同水系统的地表水，底栖生物的沉积物和水生物中的有机氯农药（OCP），多氯联苯（PCB）和多环芳烃（PAH）。有关这些有机污染物含量的信息根据确定这些化合物毒性的普遍接受的监管标准进行了收集，总结和介绍。确定了第聂伯河和黑海的五个水系统（第聂伯-布格河口，多瑙河三角洲，巴拉克拉瓦湾，塞瓦斯托波尔湾）中生态毒物浓度的变化规律。结果发现，在许多底部沉积物样品中，记录的OCP，PCB和PAH含量超过了TEC（阈值浓度）和PEC（可能浓度）值。为了评估水溶生物的毒性，给出了相对于毒性当量因子（TEF）和毒性当量（TEQ）的OCP和PCB含量。给出了相对于TEQ的水溶菌中PCB的含量，它表明底层的水溶菌被OCP和PCB的化合物严重污染，因此，有机物可以沿着营养链生物富集此类有机污染物。