Characterization and risk management of perchlorate formation related to drinking water treatment process

众所周知，高氯酸盐会干扰碘的吸收。已在水源水和饮用水中检测到该物质。在水处理过程中，臭氧氧化不会产生高氯酸盐，但投加次氯酸钠溶液或现场生成次氯酸盐会增加高氯酸盐的生成。在电解产生和储存过程中，高氯酸盐浓度增加。应通过抑制氯酸盐的生成来控制处理过程中的高氯酸盐生成。测试了六种不同性能的电极(a：Ru/Ti、b：Ru/Ir/Ti、c：Ir/Sn、d：Ir/Pt、e：PT和f：Pb)。在电流一定的情况下，氧超电压越高的电极，其电压越高，次氯酸盐的生成量越低，氯酸盐和高氯酸盐的生成量越高。

Perchlorate is known to interfere with iodine uptake. It has been detected in source water and drinking water. During water treatment process, perchlorate was not produced in ozonation, but it was increased by addition of sodium hypochlorite solution or on-site generated hypochlorite. Perchlorate concentration was increased during electrolysis generation and storage. Perchlorate generation in treatment process should be controled by suppression of chlorate generation. Six electrodes of different property (a:Ru/Ti, b:Ru/Ir/Ti,c:Ir/Sn,d:Ir/Pt,e:Pt,and f:Pb) were tested. When electric current is constant, those electrodes of higher oxygen hyper voltage showed higher electric voltage, lower production of hypochlorite, and higher generation of chlorate and perchlorate.