铁盐絮体预负载-超滤除锑(V)效能研究

采用“铁盐絮体预负载-超滤”耦合工艺,有效提高了水中金属锑的去除效果,缓解超滤污染.结果表明,当水样pH<7时,锑（V）的去除效率高达98%以上,且出水锑（V）浓度远低于5μg/L;腐殖酸去除效果在不同化学条件下均能保持95%以上.铁盐絮体预负载层能作为超滤膜的屏障,减少了超滤膜接触污染物几率,当水样pH=6时,不可逆污染的相对值最低为0.015.

Study on the removal performance of antimony (V) by preloading iron salt floc and ultrafiltration

The coupling technology of "iron salt floc preloading-ultrafiltration" can effectively improve the removal effect of metal antimony in water and alleviate ultrafiltration fouling. The results showed that the removal efficiency of antimony (V) was more than 98% and the effluent concentration of antimony (V) was far lower than 5μg/L, when the pH of water samples was less than 7. The removal efficiency of humic acid can maintain more than 95% under different chemical conditions. The iron salt flocs preloading layer could play the barrier role for the ultrafiltration membrane, which could reduce the chance of ultrafiltration membrane to contact with pollutants. When the pH of the water samples was 6, the relative value of the irreversible pollution could reach as least as 0.015.