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Superior Antifouling Capability of Hydrogel Forward Osmosis Membrane for Treating Wastewaters with High Concentration of Organic Foulants
Environmental Science & Technology ( IF 10.8 ) Pub Date : 2018-01-17 00:00:00 , DOI: 10.1021/acs.est.7b04838 Detao Qin 1 , Zhaoyang Liu 2 , Zhi Liu 3 , Hongwei Bai 4 , Darren Delai Sun 5
Environmental Science & Technology ( IF 10.8 ) Pub Date : 2018-01-17 00:00:00 , DOI: 10.1021/acs.est.7b04838 Detao Qin 1 , Zhaoyang Liu 2 , Zhi Liu 3 , Hongwei Bai 4 , Darren Delai Sun 5
Affiliation
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Wastewaters with high concentrations of organic pollutants pose a great challenge for membrane filtration due to their severe fouling propensity. In this study, a hydrogel forward osmosis (FO) membrane is explored for treating wastewaters of high concentration organic pollutants. This FO membrane has an ultrathin hydrogel selective layer, which is highly hydrophilic (water contact angle as low as 18°) and smooth (surface roughness <5 nm). Investigated with typical organic foulants (protein, alginate, humic acid, and oil) of high concentration (2000–20 000 mg/L), this hydrogel FO membrane exhibits remarkably superior antifouling capability, with its water flux decline ratio lower than a quarter that of commercial FO membrane under identical experimental conditions. The foulants on hydrogel membrane surface can be easily removed by simple physical cleaning without any chemical usage. At the same time, this hydrogel FO membrane achieves ∼2 times higher separation efficiency than commercial FO membrane in terms of specific water flux (JW/JS). The antifouling capability and separation efficiency of this FO membrane can be flexibly tailored during selective layer fabrication process. This study opens a new avenue for the treatment of high-strength organic wastewaters by developing a highly antifouling hydrogel-based FO membrane.
中文翻译：
水凝胶正渗透膜在高浓度有机污垢废水处理中的卓越防污能力
高有机污染物浓度的废水由于其严重的结垢倾向而对膜过滤提出了巨大的挑战。在这项研究中，探索了一种水凝胶正渗透（FO）膜来处理高浓度有机污染物的废水。该FO膜具有超薄水凝胶选择层，该层具有高度亲水性（水接触角低至18°）和光滑（表面粗糙度<5 nm）。通过对高浓度（2000-20 000 mg / L）的典型有机污垢物（蛋白质，藻酸盐，腐殖酸和油）进行研究，该水凝胶FO膜具有非常优异的防污能力，其水通量下降率低于四分之一在相同的实验条件下制备商用FO膜 水凝胶膜表面上的污垢可以通过简单的物理清洁轻松去除，而无需使用任何化学药品。同时，就比水通量而言，这种水凝胶FO膜的分离效率比市售FO膜高约2倍（J W / J S）。这种FO膜的防污能力和分离效率可以在选择性层制造过程中灵活调整。这项研究通过开发一种高度防污的基于水凝胶的FO膜，为处理高强度有机废水开辟了一条新途径。
更新日期：2018-01-17
中文翻译：
水凝胶正渗透膜在高浓度有机污垢废水处理中的卓越防污能力
高有机污染物浓度的废水由于其严重的结垢倾向而对膜过滤提出了巨大的挑战。在这项研究中，探索了一种水凝胶正渗透（FO）膜来处理高浓度有机污染物的废水。该FO膜具有超薄水凝胶选择层，该层具有高度亲水性（水接触角低至18°）和光滑（表面粗糙度<5 nm）。通过对高浓度（2000-20 000 mg / L）的典型有机污垢物（蛋白质，藻酸盐，腐殖酸和油）进行研究，该水凝胶FO膜具有非常优异的防污能力，其水通量下降率低于四分之一在相同的实验条件下制备商用FO膜 水凝胶膜表面上的污垢可以通过简单的物理清洁轻松去除，而无需使用任何化学药品。同时，就比水通量而言，这种水凝胶FO膜的分离效率比市售FO膜高约2倍（J W / J S）。这种FO膜的防污能力和分离效率可以在选择性层制造过程中灵活调整。这项研究通过开发一种高度防污的基于水凝胶的FO膜，为处理高强度有机废水开辟了一条新途径。
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