2nd International Conference on Materials Science, Energy Technology and Environmental Engineering | |
Study on natural soil coagulants for point-of-use drinking water treatment | |
材料科学;能源学;生态环境科学 | |
Qi, Xuejiao^1 ; Wang, Hongtao^1 ; Getahun, Eyasu Tarekegn^1 ; Luo, Muxi^1 ; Chen, Zuohong^1 ; Duan, Haowen^1 ; Ren, Tongxuan^1 ; Wu, Yi-Nan^1 ; Li, Fengting^1 | |
Key Laboratory of Yangtze River Water Environment, Ministry of Education, State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai, China^1 | |
关键词: Drinking water standards; Initial concentration; Natural soils; Optimum working conditions; Polyaluminum chloride; Purified water; Total bacteria; Turbidity removal efficiency; | |
Others : https://iopscience.iop.org/article/10.1088/1755-1315/81/1/012018/pdf DOI : 10.1088/1755-1315/81/1/012018 |
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来源: IOP | |
【 摘 要 】
Natural soil coagulants were used for domestic drinking water treatment in Ethiopia because of lacking drinking water supply. In this study, two soils were collected from Ethiopia and jar test was used to investigate the optimum working conditions, performance and safety of them. The turbidity removal efficiencies of soil A and soil B are 74.5% and 91.1% (initial turbidity=400 NTU), respectively. The pH of purified water can meet drinking water standards of Ethiopia (pH=6.5-8.5). Both soils contribute to remove TOC when the initial concentration of it is high. A small amount (0.5 mg. L-1 or 1 mg. L-1) of poly-aluminum chloride can improve the performance of soil coagulants for the removal of turbidity. The application of soil coagulants didnt introduce coliforms, although the total bacteria number of treated water increased to 40 CFU (soil A) and 81 CFU (soil B), still meeting the drinking water quality standards (
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