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首页> 外文期刊>Separation and Purification Technology >Separation of cadmium and copper from phosphorous rich synthetic waters by micellar-enhanced ultrafiltration
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Separation of cadmium and copper from phosphorous rich synthetic waters by micellar-enhanced ultrafiltration

机译：胶束增强超滤从富磷合成水中分离镉和铜

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In this study, micellar-enhanced ultrafiltration (MEUF) was proved to be a viable technique for the purification of phosphorous rich waters. The experiments were conducted in order to study the simultaneous removal of heavy metals from phosphorous rich synthetic waters by evaluating the effect of pH (3.5-5) and the feed concentrations of sodium dodecyl sulphate (C_(SDS), 3.5-20 mM), phosphorous (C_(Phosph), 0-1.3 g/dm~3), zinc (C_(Zn), 0.8-2 mg/dm~3) and nickel (C_(Zn), 2-4 mg/dm~3) on the rejection coefficients of cadmium and copper. Zinc and nickel feed concentrations had no statistically significant effect and the metal competition was negligible. pH, SDS and phosphorous feed concentration did show a significant effect on the MEUF process. Rejection coefficients up to 98% were achieved for both metals when no phosphorous was present and at SDS feed concentration of 20 mM. The phosphorous feed concentration showed a bigger negative effect on the rejection coefficient of copper at higher pH levels due to complex formation. At low pH values and in the presence of phosphorous the heavy metals were present as divalent cations and no complex formation was observed. In these conditions, copper rejection coefficients were very similar to cadmium, achieving up to 80% removal of heavy metals. At higher pH levels the presence of Cu3(PO4)2 was more substantial and the rejection coefficients of copper decreased to 65%. The research presented in this manuscript could lead to novel uses of MEUF for the purification of nutrients from wastewater streams prior to their recovery, closing phosphorus cycles in anthropogenic systems.
机译：在这项研究中，胶束增强超滤（MEUF）被证明是一种纯化富磷水的可行技术。进行实验是为了通过评估pH（3.5-5）和十二烷基硫酸钠进料浓度（C_（SDS），3.5-20 mM）的影响来研究同时从富含磷的合成水中去除重金属的方法，磷（C_（Phosph），0-1.3 g / dm〜3），锌（C_（Zn），0.8-2 mg / dm〜3）和镍（C_（Zn），2-4 mg / dm〜3）镉和铜的排斥系数。锌和镍的进料浓度无统计学意义，金属竞争微不足道。 pH，SDS和磷的进料浓度确实对MEUF过程显示出显着影响。当无磷存在且SDS进料浓度为20 mM时，两种金属的排斥系数均达到98％。由于络合物的形成，在较高的pH值下，磷的进料浓度对铜的截留系数表现出较大的负面影响。在低pH值和磷存在下，重金属以二价阳离子形式存在，未观察到络合物形成。在这些条件下，铜的排阻系数与镉非常相似，可去除高达80％的重金属。在较高的pH值下，Cu3（PO4）2的存在更为显着，铜的排斥系数降至65％。该手稿中的研究可能会导致MEUF在废水回收之前用于废水中养分的纯化的新用途，从而关闭人为系统中的磷循环。

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