The prevalence of emerging contaminants of concern in water regimes is very common these days. High anthropogenic intervention is leading to occurrence of various types of microcontaminants of concern in drinking water systems. Their removal using conventional form of treatment systems employed in water treatment plants is not widely researched upon. Their fate in the conventional as well as advanced water treatment system needs to be focused upon for efficient and safe water disposal. Some compounds may leave the system unchanged or some might transform into much more toxic byproduct. Moreover, understanding level of occurrence of these emerging contaminants in source water bodies is also quintessential for assessing their fate in treatment plant itself as well as in the final treated water. Here in this study, the occurrence and removal of various classes of emerging contaminants were investigated in a moving bed biofilm reactor (MBBR)–based advanced drinking water treatment plant (ADWTP) alongside one conventional drinking water treatment plant, both of which use River Yamuna as the source of water. Non-target analysis utilizing high-performance liquid chromatography combined with time of flight (HPLC-QToF) identified more than 300 compounds. Pharmaceuticals accounted for a major fraction (58%) of the identified compounds, followed by plasticizers and insecticides. Nine parent compound and their transformation products were additionally identified using solid-phase extraction followed by analysis using gas chromatography mass spectrometry and HPLC-QToF. The degradation pathway of the parent compounds in MBBR-based ADWTP was also analyzed in depth. The efficiency of each unit process of MBBR-based drinking water treatment plant was studied in terms of removal of few emerging contaminants. Pharmaceutical compound like diclofenac supposedly was persistent, even, toward the end of the treatment train. Semi-quantitative analysis revealed ineffective removal of pyridine, hydrochlorothiazide, and diethyl phthalate in the outlet of ADWTP. ADWTP was able to remove a few emerging contaminants, but a few were recalcitrant. Likewise, it was established that although some parent compounds were degraded, much more toxic transformation products were formed and were prevalent at the end of the treatment.

中文翻译：

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在印度亚穆纳河附近的基于移动床生物膜反应器（MBBR）的饮用水处理厂中识别新兴污染物及其转化产物。

如今，水系统中新出现的污染物普遍存在。高度的人为干预导致饮用水系统中各种类型的微污染物的出现。使用用于水处理厂的常规形式的处理系统去除它们的方法尚未得到广泛研究。他们需要关注常规水处理系统和先进水处理系统中的命运，以实现高效，安全的水处理。有些化合物可能会使系统保持不变，或者有些化合物可能转化为毒性更大的副产物。而且，了解这些新兴污染物在水源水体中的发生水平对于评估其在处理厂本身以及最终处理水中的命运也具有重要意义。在这项研究中 在一个基于移动床生物膜反应器（MBBR）的高级饮用水处理厂（ADWTP）和一个常规饮用水处理厂之间进行了各种类别新兴污染物的发生和清除，这两个工厂均使用Yamuna河作为水源。利用高效液相色谱和飞行时间（HPLC-QToF）进行的非目标分析鉴定出300多种化合物。药物占已鉴定化合物的主要部分（58％），其次是增塑剂和杀虫剂。另外使用固相萃取鉴定了九种母体化合物及其转化产物，然后使用气相色谱质谱法和HPLC-QToF进行了分析。深入分析了基于MBBR的ADWTP中母体化合物的降解途径。基于MBBR的饮用水处理厂的每个单元过程的效率均以去除少数新兴污染物的方式进行了研究。据推测，像双氯芬酸这样的药物化合物甚至在治疗过程即将结束时就具有持久性。半定量分析表明，ADWTP出口中吡啶，氢氯噻嗪和邻苯二甲酸二乙酯的去除效果不佳。ADWTP能够去除一些新出现的污染物，但是有一些是顽固的。同样，已经确定，尽管某些母体化合物被降解，但形成了更多的毒性转化产物，并在处理结束时普遍存在。甚至在治疗列车快要结束时。半定量分析表明，ADWTP出口中吡啶，氢氯噻嗪和邻苯二甲酸二乙酯的去除效果不佳。ADWTP能够去除一些新出现的污染物，但是有一些是顽固的。同样，已经确定，尽管某些母体化合物被降解，但形成了更多的毒性转化产物，并在处理结束时普遍存在。甚至在治疗列车快要结束时。半定量分析表明，ADWTP出口处的吡啶，氢氯噻嗪和邻苯二甲酸二乙酯的去除效果不佳。ADWTP能够去除一些新出现的污染物，但是有一些是顽固的。同样，已经确定，尽管某些母体化合物被降解，但形成了更多的毒性转化产物，并在处理结束时普遍存在。