摘要
The performance of different nanofiltration （NF） and reverse osmosis （RO） membranes was studied in treating the toxic metal effluent from metallurgical industry. The characteristics and filtration behavior of the processes including the wastewater flux, salt rejection and ion rejection versus operating pressure were evaluated. Then the wastewater flux of RO membrane was compared with theoretical calculation using mass transfer models, and good consistency was observed. It was found that a high rejection rate more than 95% of metal ions and a low Chemical Oxygen Demand （COD） value of 10 mg·L^-1 in permeate could be achieved using the RO composite membrane, while the NF rejection of the salt could be up to 78.9% and the COD value in the permeate was 35 mg·L^-1. The results showed that the product water by both NF and RO desalination satisfied the State Reutilization Qualification, but NF would be more suitable for large-scale industrial practice, which offered significantly higher permeate flux at low operating pressure.
不同 nanofiltration (NF ) 和反渗透(RO ) 的表演膜在对待有毒的金属自河从被学习冶金工业。包括废水流动，盐拒绝和离子拒绝对操作压力的过程的特征和过滤行为被评估。当时， RO 膜的废水流动与用传质模型的理论计算相比，并且好一致性被观察。它被发现地席超过95%金属离子和低化学需氧量(货到付款) 10 mg-L 珍视在的高拒绝率渗入能用 RO 复合膜被完成，当盐的 NF 拒绝能直到78.9%，在permeate 的货到付款价值是 35 mg ·L ~时(-1)。结果证明由 NF 和 RO 脱盐的产品水满足了州的利用资格，而是 NF 将对大规模工业实践更合适，它出现了更高显著地渗入在低操作压力的流动。
基金
Supported by the National Natural Science Foundation of China （20476096, 20776133）, Zhejiang Provincial Bureau of Science ＆ Technology （2005C33040） and Bureau of Education （Key Discipline of Environmental Engineering 56310503014）.
作者简介
To whom correspondence should be addressed. E-mail： guoliangz @ zjut.edu.cn
