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微污染引黄水库水中有机物特性研究

     

摘要

为解决有机微污染水源水的工艺选择问题,以黄河下游地区某引黄水库为研究对象,分析了有机物含量的年度变化规律,研究了比紫外吸收值( SUVA)、分子质量分布、消毒副产物生成势( DBPFP)、嗅味物质等有机污染特性.结果表明:引黄水库水有机物含量全年变化幅度不大,耗氧量平均为2.32 mg/L, UV254平均为0.045 cm-1,籽( DOC)平均为2.32 mg/L;但芳香化构造程度较高,以小分子有机物为主,分子质量<3 ku的约占总量的70%;消毒副产物生成势较高,以三卤甲烷为主,占DBPFP总量的94.6%,其中CHCl3占77%;二甲基异崁醇含量较高,呈季节性变化,主要由蓝藻中的浮丝藻、颤藻等的代谢产生;引黄水库水有机物特性与黄河来水水质、沉砂调蓄过程及水力停留时间等因素有关,适宜选择臭氧活性炭深度工艺进行处理.%To select the process for source water with organic micro-pollution, the annual changes of organic content, specific ultraviolet absorbance ( SUVA ) , disinfection by products formation potential ( DBPFP) , molecular mass distribution, taste and odor were all analyzed in a micro-polluted reservoir, which took water from the downstream of the Yellow River. Results showed that the organic contents changed slightly throughout the year, and the average of oxygen consumption, UV254 , DOC were 2.32 mg/L, 0.045 cm-1 , 2.32 mg/L, respectively. However, the SUVA was higher;small organic molecules was the most, mainly to 70% of it ( <3 ku);DBPFP was also higher, and THMs accounted for 94.6%of DBPFP, with CHCl3 accounted for 77%. The 2-methylisoborneol (2-MIB) concentration changed with season, which accorded to the alcohol content and metabolized by Cyanobacteria, such as Planktonema, Oscillatoria, etc. The organics characteristics of the reservoir water were associated with HRT of the process of sand setting, storage from the Yellow River and its sources of organic matters. Ozone biological activated carbon process was appropriate to be used for treatment.

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