原水中痕量有机碳的大孔树脂--活性炭深度净化研究

发布时间：2018-08-25 08:02

【摘要】：很多消毒副产物(DBPs)对人类健康具有危害,采用大孔树脂固定床工艺和活性炭批处理联合处理方法,研究了对原水低浓度水溶性有机质(DOM)的去除效果,以期降低饮用水中的DBPs浓度。结果表明:单独采用4种大孔树脂处理原水,DAX-8和ADX-4对于水中总有机碳(TOC)去除率较高,最佳流速条件下,DAX-8、ADX-4对TOC去除率分别为23.67%、22.36%;单独采用6种活性炭处理原水,原水中TOC去除率随着活性炭投加量的增加而增加,当投加量为320 mg/L时,6种活性炭(GAC1、GAC2、GAC3、GAC4、GAC5、GAC6)对TOC的去除率分别为53.67%、63.24%、63.35%、61.24%、65.63%、56.80%;其中GAC5的TOC去除率更佳。DAX-8+GAC5联合处理与ADX-4+GAC5联合处理原水的TOC总去除率更佳,前者略低于后者,最大总去除率分别达到78.34%、82.65%;但DAX-8+GAC5联合处理的比紫外吸收值却低于ADX-4+GAC5联合处理,表明DAX-8对原水DOM中疏水性有机质的去除能力更强;DAX-8、ADX-4、GAC5经过3次再生,对于原水TOC的去除效率依然可以达到初次使用效率的80%以上,表明两种大孔树脂和GAC5一定程度上可以重复利用。
[Abstract]:Many disinfection by-products (DBPs) are harmful to human health. The removal efficiency of low concentration water-soluble organic matter (DOM) in raw water was studied by using macroporous resin fixed bed process and activated carbon batch process in order to reduce the concentration of DBPs in drinking water. For the total organic carbon (TOC) removal rate in water is higher, the removal rate of TOC by DAX-8 and ADX-4 is 23.67% and 22.36% respectively under the optimum flow rate. The removal rate of TOC by six kinds of activated carbon increases with the increase of the amount of activated carbon added to raw water. When the amount of activated carbon is 320 mg/L, the removal rate of TOC by six kinds of activated carbon (GAC1, GAC2, GAC3, GAC4, GAC5, GAC6) is higher. The removal rates of TOC were 53.67%, 63.24%, 63.35%, 61.24%, 65.63%, 56.80% respectively, and the TOC removal rate of GAC5 was better. The total removal rate of TOC of DAX-8 + GAC5 combined treatment and ADX-4 + GAC5 combined treatment was better, the former was slightly lower than the latter, the maximum removal rate was 78.34%, 82.65% respectively; but the specific ultraviolet absorption value of DAX-8 + GAC5 combined treatment was lower than that of ADX-4 + GA-5 combined treatment. The combined treatment of DAX-8 and GAC5 showed that DAX-8 could remove more hydrophobic organic matter from DOM of raw water. After three times regeneration, the removal efficiency of TOC in raw water could still reach 80% of the initial utilization efficiency, indicating that the two macroporous resins and GAC5 could be reused to a certain extent.
【作者单位】：西南大学资源环境学院三峡库区生态环境教育部重点实验室;重庆市农业资源与环境研究重点实验室;
【基金】：国家重点研发计划重点专项(No.2017YFD0801004) 西南大学生态学重点学科“211工程”建设项目重庆市自然科学基金资助项目(No.2008BB7099)
【分类号】：TU991.2

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