Panouillères Muriel, Boillot Clotilde, Perrodin Yves
Laboratoire des Sciences de l'Environnement, Ecole Nationale des Travaux Publics de l'Etat, Rue Maurice Audin, Vaulx-en-Velin, France.
Ecotoxicology. 2007 Apr;16(3):327-40. doi: 10.1007/s10646-007-0136-2. Epub 2007 Mar 14.
Hospital effluents cause environmental problems since they are 5-15 more toxic than urban effluents and they are not subjected to any pre-treatment before being discharged into urban sewage networks. The hypothesis used to explain this toxicity is the presence of disinfectants and detergents. This study is aimed at highlighting the ecotoxicity of a peracetic acid-based disinfectant to Daphnia magna, as well as the combined effects of this disinfectant in binary mixtures with three types of detergent. The detergents used here are: cetyltrimethylammonium bromide (CTAB, cationic), sodium dodecylsulfate (SDS, anionic) and Triton X-100 (TX, non-ionic). The toxicity of the mixtures is studied as a function of five predefined ratios. At the end of the study, we conclude that peracetic acid seems to be slightly toxic to Daphnia magna. Indeed, the efficient concentration inhibiting the mobility of 50% of the population of Daphnia at 24 h (EC50) is 116.6 mg/l. Globally, additive effects are observed for all the binary peracetic acid-detergent mixtures. However, for the peracetic acid-TX mixture, its effects have antagonistic tendencies whereas the peracetic acid-CTAB mixture has slight synergic tendencies. The mixture containing peracetic acid and SDS is slightly antagonistic for ratios containing more than 50% peracetic acid.
医院污水会引发环境问题，因为其毒性比城市污水高5至15倍，并且在排入城市污水管网之前未经过任何预处理。用于解释这种毒性的假说是消毒剂和洗涤剂的存在。本研究旨在突出一种基于过氧乙酸的消毒剂对大型溞的生态毒性，以及该消毒剂与三种类型洗涤剂二元混合后的联合效应。这里使用的洗涤剂分别是：十六烷基三甲基溴化铵（CTAB，阳离子型）、十二烷基硫酸钠（SDS，阴离子型）和 Triton X - 100（TX，非离子型）。研究了混合物的毒性与五个预定义比例的函数关系。在研究结束时，我们得出结论，过氧乙酸似乎对大型溞有轻微毒性。实际上，在24小时时抑制50%大型溞种群活动的有效浓度（EC50）为116.6毫克/升。总体而言，所有过氧乙酸 - 洗涤剂二元混合物都观察到了相加效应。然而，对于过氧乙酸 - TX混合物，其效应有拮抗趋势，而过氧乙酸 - CTAB混合物有轻微协同趋势。对于过氧乙酸含量超过50%的比例，含有过氧乙酸和SDS的混合物有轻微拮抗作用。
