Bester K
Institute of Environmental Research, University of Dortmund, Otto Hahn Str 6, Dortmund 44221, Germany.
Water Res. 2003 Sep;37(16):3891-6. doi: 10.1016/S0043-1354(03)00335-X.
In a German sewage treatment plant that processes 200000 m(3) wastewater per day, the concentrations of 2,4,4'-trichloro, 2'-hydroxy-phenylether (triclosan) in the in-flowing ( approximately 1000 ng x l(-1)) as well as in the out-flowing water ( approximately 50 ng x l(-1)) are compared to the concentrations measured in sludge (1200 ng x g(-1)). Considering the mass flow of water and sludge in the respective plant, balances including water and sludge are calculated. Thirty percent of the triclosan is sorbed with weak bonds to the sludge, while some amounts are sorbed as bound residues in the sludge. About 5% is dissolved in the out-flowing water. Thus most of the in-flowing material is not recovered as the parent compound but it is likely that it is transformed to other metabolites or unrecovered bound residues. These data are compared to the monitoring of sewage sludge of 20 different plants in this region, most of which are smaller, though. The concentrations found in these sludges vary from 1000-8000 ng x g(-1).
在一座日处理200000立方米废水的德国污水处理厂中，将流入水中（约1000纳克/升）以及流出水中（约50纳克/升）的2,4,4'-三氯-2'-羟基苯醚（三氯生）浓度与污泥中测得的浓度（1200纳克/克）进行了比较。考虑到该厂中水流和污泥的质量流量，计算了包括水和污泥在内的平衡。30%的三氯生以弱键形式吸附在污泥上，同时有一些量以结合残留物的形式吸附在污泥中。约5%溶解在流出水中。因此，大部分流入物质并非以母体化合物形式回收，而是很可能已转化为其他代谢物或未回收的结合残留物。将这些数据与该地区20家不同工厂的污水污泥监测数据进行了比较，不过其中大多数工厂规模较小。这些污泥中测得的浓度在1000 - 8000纳克/克之间。
