University of L'Aquila, Dept. of Industrial and Information Engineering and of Economics, Viale Giovanni Gronchi 18, 67100 L'Aquila, Italy.
University of L'Aquila, Dept. of Industrial and Information Engineering and of Economics, Viale Giovanni Gronchi 18, 67100 L'Aquila, Italy.
Waste Manag. 2018 Apr;74:393-403. doi: 10.1016/j.wasman.2017.12.018. Epub 2017 Dec 18.
In this paper, the efficiency of micellar enhanced ultrafiltration technique (MEUF) was tested for the removal of yttrium and zinc ions from synthetic industrial liquid wastes. UF membranes (monotubular ceramic membranes of 210 kDa and 1 kDa molecular weight cut-off) were used with adding an anionic surfactant, sodium dodecyl sulfate (SDS). A two - level full factorial design was performed in order to evaluate the effect of molecular weight cut-off, sodium dodecyl sulfate concentration and pressure on the permeate flux and rejection yields. It was found that the single factors presented the largest influence on the permeate flux: the membrane pore size and the pressure had positive effect, instead the SDS had negative effect. Regarding the metal rejection yields the main relevant factors were the membrane pore size with a negative effect, followed by the surfactant concentration with a positive effect. The effect of the pressure seemed to be almost negligible, for zinc removal experiments had a positive effect in the interactions with the surfactant and membrane pore size. The results showed that very good removal percentages up to 99% were achieved for both metals under the following conditions: 1 kDa membrane MWCO, in the presence of the surfactant at a concentration above CMC independently of the investigated pressure.
本文测试了胶束强化超滤技术（MEUF）用于从合成工业废液中去除钇和锌离子的效率。使用 UF 膜（210 kDa 和 1 kDa 分子量截留的单管式陶瓷膜），并添加阴离子表面活性剂十二烷基硫酸钠（SDS）。进行了两水平完全析因设计，以评估分子量截留、十二烷基硫酸钠浓度和压力对渗透通量和截留率的影响。结果表明，单因素对渗透通量的影响最大：膜孔径和压力有积极影响，而 SDS 则有消极影响。至于金属截留率，主要相关因素是膜孔径的负面影响，其次是表面活性剂浓度的积极影响。压力的影响似乎几乎可以忽略不计，因为在与表面活性剂和膜孔径的相互作用中，锌去除实验具有积极的影响。结果表明，在以下条件下，两种金属的去除率都非常好，高达 99%：1 kDa 膜 MWCO，在表面活性剂存在下，CMC 以上的浓度独立于所研究的压力。
