Division of Environmental Science and Ecological Engineering, Korea University, Seoul, Republic of Korea.
Bull Environ Contam Toxicol. 2011 Sep;87(3):319-23. doi: 10.1007/s00128-011-0360-6. Epub 2011 Jul 15.
In this study, acute toxicity monitoring and toxicity identification evaluation procedures were applied to identify causative toxicants in industrial effluents. Effluents from a metal plating factory and a rubber products factory were acutely toxic toward Daphnia magna and the toxicity varied over different sampling events (2.9-5.9 and 1.7-7.6 TU, respectively). For the rubber products effluent, it was confirmed that zinc (5.65-13.18 mg L(-1)) was found to be a major cause of toxicity, which is likely originated from zinc 2-mercaptobenzothiazole and zinc diethyldithiocarbamate used as vulcanization accelerators. For the metal plating effluent, it appeared that the presence of high concentrations of Cl(-) and SO(4)(2-) (8,539-11,400 and 3,588-4,850 mg L(-1), respectively) caused the observed toxicity. These toxicants likely originated from sodium bisulfate (NaHSO(3)) and sodium hypochlorite (NaOCl) used as reducing and oxidizing agents. Though copper was found to be present in levels much higher than the EC(50) (50% effective concentration) value, this was not attributable to the toxicity of metal plating effluent likely due to complexation with dissolved organic matter.
在这项研究中，急性毒性监测和毒性识别评估程序被应用于识别工业废水中的有毒物质。电镀厂和橡胶制品厂的废水对大型蚤具有急性毒性，且毒性在不同的采样事件中有所变化（分别为 2.9-5.9 和 1.7-7.6 TU）。对于橡胶制品废水，锌（5.65-13.18 mg/L）被确定为主要的毒性原因，这可能来源于作为硫化促进剂的锌 2-巯基苯并噻唑和锌二乙基二硫代氨基甲酸盐。对于电镀废水，高浓度的 Cl(-)和 SO(4)(2-)（分别为 8,539-11,400 和 3,588-4,850 mg/L）的存在似乎导致了观察到的毒性。这些有毒物质可能来源于作为还原和氧化剂的亚硫酸氢钠（NaHSO(3)）和次氯酸钠（NaOCl）。尽管铜的浓度远高于 EC(50)（有效浓度的 50%）值，但这并不是电镀废水毒性的原因，可能是由于与溶解的有机物络合。
