Arsenic Removal from Drinking Water by Self-Made PMIA Nanofiltration Membrane
Arsenic Removal from Drinking Water by Self-Made PMIA Nanofiltration Membrane
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DOI：
10.4236/aces.2012.23043
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发表时间：
2012-07
期刊：
影响因子：
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通讯作者：
Changwei Zhao;Songshan Du;Tao Wang;Z. Jian;Z. Luan
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文献类型：
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作者：
Changwei Zhao;Songshan Du;Tao Wang;Z. Jian;Z. Luan
采用自制的PMIA非对称纳滤膜对饮用水进行纳滤膜除砷试验。考察了进料浓度、操作压力、pH值和存在离子对As（V）去除率的影响。实验结果表明，在所研究的As进料浓度范围内，As（V）的截留率高于90%。As（V）的去除率随压力的增加而略有增加，在0.4 ~ 0.8MPa压力范围内，As（V）的去除率大于90%。As（V）截留率从pH 3时的83%显著增加至pH 9时的99%。NaCl的存在在一定浓度范围内提高了As（V）的截留率，当As浓度为100 μg/L时，As（V）的截留率可达99%，而Na 2SO 4的存在使As（V）的截留率降低了8%.结果表明，在实验研究范围内，当进水砷浓度为10 μg/L时，渗透液中检出的As（V）低于EPA推荐的MCL。
A self-made PMIA asymmetric nanofiltration membrane was used for arsenic removal from drinking water by NF process. Effects of feed concentration, operating pressure, pH and existing ions on As(V) removal were investigated. Experimental results showed that As(V) rejection was higher than 90% in the range of investigated As feed concentrations. The As(V) rejection increased slightly with pressure increase, As(V) rejection was higher than 90% in the pressure range of 0.4 MPa to 0.8 MPa. As(V) rejection increased significantly from 83% at pH 3 to 99% at pH 9. The presence of NaCl enhanced As(V) rejection in the range of feed concentration, and As(V) rejection can reach up to 99% at a feed As concentration of 100 μg/L, whereas there was a rejection decrease of 8% in the presence of Na2SO4 at every feed concentration. The results showed the As(V) detected in the permeate was lower than the EPA recommended MCL up to a feed As concentration of approximately 10 μg/L in the experimental research range.