水厂水处理工艺中总有机碳及三卤甲烷生成势变化影响研究  

Study on the Influence of Treatment Process at Water Treatmentplant to the Total Organic Carbon(TOC)and Trihalomethane Formation Potential(THMFP)

作　　者：张国溢 汤灿明 Zhang Guoyi;Tang Canming(Guangdong Provincial Key Laboratory of Chemical Measurement and Emergency Test Technology,Institute of Analysis,Guangdong Academy of Sciences(China National Analytical Center,Guangzhou),Guangzhou 510070,China)

机构地区：[1]广东省科学院测试分析研究所(中国广州分析测试中心)广东省化学测量与应急检测技术重点实验室,广东广州510070

出　　处：《云南化工》2024年第10期144-148,共5页Yunnan Chemical Technology

基　　金：广东省科技计划资助项目(2017A070701028)。

摘　　要：对自来水处理厂各个水处理工艺段出水中总有机碳、三卤甲烷以及三卤甲烷生成势等指标进行了调查分析,研究了水处理过程中总有机碳在各个流程中的消除情况和变化趋势,从横向和纵向两个方面对比及分析了三卤甲烷的含量变化趋势及组成情况,对各工艺段三卤甲烷生成势进行了量值分析并将其与总有机碳含量进行了关联性分析。实验结果表明:溶解性有机碳浓度在整个水处理过程中呈现下降趋势,对其消除作用最明显的工艺为平流沉淀池,该流程可消除79%~87%的总有机碳;三卤甲烷在加氯经过清水池后,其含量呈现出大幅度增加,占到其整体含量的72%~77%,对其组成分析发现,其中三氯甲烷、一溴二氯甲烷、二溴一氯甲烷和三溴甲烷的质量分数之比接近于2∶2∶4,呈现出较为明显的化学反应的特点,证明其含量的增加确实来自加氯后的反应生成。采样期间三卤甲烷的质量浓度在0.4~42.9μg/L之间,符合国家相关标准;三卤甲烷生成势质量浓度变化范围为130~410μg/L,处于中等水平,且其含量与总有机碳的含量呈现出显著的正相关关系。The indicators of total organic carbon(TOC),trihalomethanes(THMs)and trihalomethane formation potential(THMFP)in the effluent of each water treatment process section of water treatment plant were investigated and analyzed.The elimination and change trend of TOC in each process of the water plant were studied.The content change and composition of THMs were compared and analyzed from horizontal and vertical aspects.The THMFP was analyzed by chlorination and correlated with the content of total organic carbon.The results showed that the concentration of dissolved organic carbon decreased in the whole process of water treatment,and the most obvious process for its elimination was advection sedimentation tank,which could eliminate 79%-87%of the total organic carbon;the content of trihalomethane significantly increased after chlorination through the clear water tank,accounting for 72%-77%of the total content,and the composition analysis showed that the content ratio of chloroform,bromodichloromethane,dibromochloromethane and tribromomethane was close to 2∶2∶4,which displayed obvious reaction characteristics.This result indicated that the contents increase of trihalomethane really comes from the reaction generation after adding chlorine.During the sampling period,the concentration of trihalomethane is between 0.4%-42.9μg/L,which meet the relevant national standards.The concentration variation of THMFP ranged at 130-410μg/L,which belong to a moderate level.Besides,obvious positive correlation relationship between the contents of THMFP and TOC were observed.

关 键 词：水处理工艺 总有机碳 三卤甲烷 三卤甲烷生成势 

分 类 号：X703[环境科学与工程—环境工程]