期刊
SCIENCE OF THE TOTAL ENVIRONMENT
卷 613, 期 -, 页码 840-846出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.scitotenv.2017.09.135
关键词
Water quality; Sodium hypochlorite; NaDCC; Household water treatment; Low cost water treatment; Chlorination
资金
- Stanford Woods Institute for the Environment
- Reed Elsevier WASH Alliance
- U.S. Environmental Protection Agency's People, Prosperity
- Planet (P3) Program [SU835313]
Chlorination is a low-cost, effective method for drinking water treatment, but aversion to the taste or smell of chlorinatedwater can limit use of chlorine treatment products. Forced choice triangle tests were used to evaluate chlorine detection and acceptability thresholds for two common types of chlorine among adults in Dhaka, Bangladesh, where previous studies have found lowsustained uptake of chlorinewater treatment products. Themedian detection threshold was 0.70 mg/L (n = 25, SD = 0.57) for water dosed with liquid sodium hypochlorite (NaOCl) and 0.73 mg/L (n = 25, SD = 0.83) for water dosed with solid sodium dichloroisocyanurate (NaDCC). Median acceptability thresholds (based on user report) were 1.16 mg/L (SD = 0.70) for NaOCl and 1.26 mg/L (SD = 0.67) for NaDCC. There was no significant difference in detection or acceptability thresholds for dosing with NaOCl versus NaDCC. Although users are willing to accept treated water in which they can detect the taste of chlorine, their acceptability limit is well below the 2.0 mg/L that chlorine water treatment products are often designed to dose. For some settings, reducing dose may increase adoption of chlorinated water while still providing effective disinfection. (C) 2017 Elsevier B.V. All rights reserved.
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