Abstract：
Bis (2-chloro-1-methylethyl) ether (DCIP), one U.S. Environmental Protection Agency priority pollutant, could pose health and/or odor risk in water environment. In this study, odor characteristics, occurrence and source of DCIP in drinking waters of China were investigated based on sensory analysis and a nation-wide investigation covering 140 drinking water treatment plants. Then multi-risk integrated health and aesthetic aspects through oral and inhalation (showering) exposure by drinking water were first estimated. Sensory evaluation showed DCIP exhibited \"solvent-like\" odor with thresholds of 34.8 ng/L in air and 142.0 ng/L in water. DCIP was detected at comparable concentrations in raw and finished waters (<1280 ng/L) and was by-product from industrial production of epichlorohydrin/propylene oxide. Lifetime Average Daily Dose through oral exposure was 0-36.65 ng/day/kg, corresponding to odor activity values of 0-8.4 and hazard quotients of far < 1, indicating drinking tap water might cause odor issues rather than significant health hazard. The proportion of sensitive population to DCIP\'s odor was 6.1%. In contrast, residents rarely detect DCIP\'s odor by inhalation. The presence in drinking water as industrial by-product, poor removal using conventional water treatment and potential to be T&O issues, indicates urgent demand for pollutant source control to protect DCIP from entering source waters.
摘要：
二(2-氯-1-甲基乙基)醚(DCIP),美国环境保护署的一个优先污染物，可能会对水环境造成健康和/或气味风险。在这项研究中,气味特征,基于感官分析和覆盖140家饮用水处理厂的全国调查，调查了中国饮用水中DCIP的发生和来源。然后，首先评估了通过饮用水口服和吸入（淋浴）暴露的多风险综合健康和美学方面。感官评估显示，DCIP表现出“溶剂样”气味，在空气中为34.8ng/L，在水中为142.0ng/L。在原水和成品水中检测到相当浓度的DCIP(<1280ng/L),并且是来自表氯醇/环氧丙烷的工业生产的副产物。通过口服暴露的寿命平均每日剂量为0-36.65ng/天/kg，对应于0-8.4的气味活性值和远<1的危险商，表明饮用自来水可能会引起气味问题，而不是重大的健康危害。对DCIP气味敏感的人群比例为6.1%。相比之下,居民很少通过吸入检测DCIP的气味。作为工业副产品存在于饮用水中，使用常规水处理去除效果不佳，有可能成为T&O问题，表明迫切需要进行污染源控制，以保护DCIP不进入水源水域。
