Bromate, chlorate, chlorite and perchlorate in sodium hypochlorite solution used in water supply
Bromate, chlorate, chlorite and perchlorate in sodium hypochlorite solution used in water supply
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DOI：
10.2166/aqua.2009.014
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发表时间：
2009-01-01
影响因子：
4.3
通讯作者：
Kunikane, Shoichi
中科院分区：
文献类型：
--
作者：
Asami, Mari;Kosaka, Koji;Kunikane, Shoichi
进行了一项调查，以揭示次氯酸钠溶液中溴酸盐、亚氯酸盐、氯酸盐和高氯酸盐的浓度，以及包括大都市地区在内的原水和加工水中的氯酸盐和高氯酸盐的浓度。高浓度的溴酸盐(最大。414 mg l(-1))和氯酸盐(最大。在购买的饮用水消毒次氯酸钠溶液中发现了26万mg l(-1))，这些溶液已长期储存，最多超过两年。在Tone河流域原水和加工水中氯酸盐和高氯酸盐的调查中，原水中氯酸盐的最高浓度为78 μ g l(-1)，高氯酸盐的最高浓度为40 μ g l（-1）。还分析了32种购买的次氯酸钠溶液和6种现场生成的次氯酸钠溶液中的氯酸盐和高氯酸盐浓度。在购买的次氯酸钠溶液中，高氯酸盐浓度范围为0.170至33.0 mg l（-1）。在次氯酸钠溶液中，测量到的游离有效氯（FAC）浓度低于制造商指定的FAC浓度，氯酸盐和高氯酸盐浓度高于相对新鲜的次氯酸钠溶液。在现场生成的次氯酸盐溶液中，氯酸盐和高氯酸盐的最大浓度分别为1,700 mg l(-1)（测量FAC的140 mg g(-1)）和0.660 mg l(-1)（测量FAC的0.053 mg g(-1)）。
A survey was conducted to reveal the concentrations of bromate, chlorite, chlorate and perchlorate as impurities in sodium hypochlorite solutions and those of chlorate and perchlorate in raw and processed waters including a metropolitan area. High concentrations of bromate (max. 414 mg l(-1)) and chlorate (max. 260,000 mg l(-1)) were found in purchased sodium hypochlorite solutions for drinking water disinfection that had been stored for a long time, more than two years at a maximum. In the survey of chlorate and perchlorate in raw and processed waters in the Tone River Basin, the highest concentration of chlorate in raw water was 78 mu g l(-1) and that of perchlorate was 40 mu g l(-1). Chlorate and perchlorate concentrations in 32 purchased sodium hypochlorite solutions and six on-site-generated hypochlorite solutions were also analysed. In the purchased sodium hypochlorite solutions, perchlorate concentrations ranged from 0.170 to 33.0 mg l(-1). In hypochlorite solutions whose measured FAC (free available chlorine) concentration was lower than the manufacturer-specified FAC concentrations, the chlorate and perchlorate concentrations were higher than those in relatively fresh sodium hypochlorite solutions. In on-site-generated hypochlorite solutions, the maximum concentrations of chlorate and perchlorate were 1,700 mg l(-1) (140 mg g(-1) of measured FAC) and 0.660 mg l(-1) (0.053 mg g(-1) of measured FAC), respectively.