科研之友
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摘要
The arsenic contamination in water forced the water and health authorities to introduce stringent standards for arsenic levels in drinking water. Recently, arsenic attracted attention because some of the drinking water resources contain considerable concentrations of arsenic which cause acute and chronic symptoms in many countries. Of the available technologies for the treatment of arsenic in drinking water, membrane treatment is the technically superior method to obtain the low level finished water arsenic concentration. In this study, the removal of arsenic from water by a nanofiltration (NF) membrane was investigated with the pretreatment of manganese/quartz sand filtration. Experiments were carried out with synthetic water of ultrapure and tap water spiked by arsenic. Results showed that As(III) and As(V) could be removed effectively by manganese/quartz sand filtration with the influent arsenic concentration 250g/L, and the effluent arsenic concentration could be less than 50g/L, while the NF presents only 40-60% removal of As(III), although the removal of As(V) is satisfactory. Furthermore, the hybrid manganese/quartz sand filtrationNF processes were tested for the removal of both As(III) and As(V) to get an lower arsenic concentration of finished water.
- 出版日期2013-7-1
- 单位同济大学
