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首页> 外文期刊>Separation and Purification Technology >Desalination of dye utilizing carboxylated TiO2/calcium alginate hydrogel nanofiltration membrane with high salt permeation
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Desalination of dye utilizing carboxylated TiO2/calcium alginate hydrogel nanofiltration membrane with high salt permeation

机译：利用羧化TiO2 /藻酸钙水凝胶纳过滤膜的染料脱盐，高盐渗透

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摘要

In order to recover dyes from textile wastewater, a self-supported carboxylated titanium dioxide/calcium alginate (TiO2-COOH/CaAlg) hydrogel nanofiltration membrane was prepared using TiO2-COOH as the reinforcing agent. The Scanning electron microscopy (SEM) and Energy dispersive X-ray (EDX) mapping scanning spectra were employed to characterize the distribution of TiO2-COOH nanoparticles on the membrane surface. The pore size distribution, zeta potential and mechanical performance of the membrane were evaluated. The rejections for single dye solutions, salt solutions and dye/salt mixture solutions were also examined. The results indicate that the TiO2-COOH nanoparticles are dispersed uniformly on the membrane surface. Compared to CaAlg membrane, the tensile strength of 20 wt% TiO2-COOH/CaAlg membrane is enhanced by 328%. At the operating pressure of 0.1 MPa, the rejection ratios of 20 wt% TiO2-COOH/CaAlg membrane for 100 mg/L Brilliant blue G250, Direct black 38 and Congo red are 98.4%, 96.8% and 95.9% respectively, and the permeate flux is about 14.1 L.m(-2).h(-1). Meanwhile, this membrane possesses the low rejection ratios for inorganic salts (16.1%, 15.6%, 12.3% and 9.0% for MgSO4, Na2SO4, MgCl2 and NaCl, respectively), excellent dye anti-fouling property and good stability in the long-term filtration for dye/salt mixture solution.
机译：为了从纺织品废水中恢复染料，使用TiO2-CoOH作为增强剂制备自支撑的羧化二氧化钛/藻酸钙/藻酸钙（TiO 2 -COOH / CAALG）水凝胶纳米过滤膜。使用扫描电子显微镜（SEM）和能量分散X射线（EDX）测绘扫描光谱，表征膜表面上的TiO2-CoOH纳米颗粒的分布。评估孔径分布，Zeta电位和膜的机械性能。还检查了单染料溶液，盐溶液和染料/盐混合物溶液的排斥。结果表明，TiO2-CoOH纳米颗粒均匀地分散在膜表面上。与CaALG膜相比，20wt％TiO2-CoOH / CaALG膜的拉伸强度增强了328％。在0.1MPa的工作压力下，为100mg / L亮蓝G250的20wt％TiO 2-CoOH / caalg膜的排斥比，直接黑38和刚果红色分别为98.4％，96.8％和95.9％，渗透物助焊剂约为14.1 LM（-2）.h（-1）。同时，该膜具有用于无机盐的低排斥比（MgSO4，Na 2 SO 4，MgCl 2和NaCl的16.1％，15.6％，12.0％和9.0％），优异的染料防污性和长期稳定性染料/盐混合物溶液过滤。

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  • 作者

    Wang Xiao-lei; Qin Wei; Wang Li-xin; Zhao Kong-yin; Wang Hui-cai; Liu Hong-yu; Wei Jun-fu;

  • 作者单位

    Tiangong Univ Natl Ctr Int Joint Res Separat Membranes State Key Lab Separat Membranes &

    Membrane Proc Tianjin 300387 Peoples R China;

    Tiangong Univ Natl Ctr Int Joint Res Separat Membranes State Key Lab Separat Membranes &

    Membrane Proc Tianjin 300387 Peoples R China;

    Tiangong Univ Natl Ctr Int Joint Res Separat Membranes State Key Lab Separat Membranes &

    Membrane Proc Tianjin 300387 Peoples R China;

    Tiangong Univ Natl Ctr Int Joint Res Separat Membranes State Key Lab Separat Membranes &

    Membrane Proc Tianjin 300387 Peoples R China;

    Tiangong Univ Natl Ctr Int Joint Res Separat Membranes State Key Lab Separat Membranes &

    Membrane Proc Tianjin 300387 Peoples R China;

    Tiangong Univ Natl Ctr Int Joint Res Separat Membranes State Key Lab Separat Membranes &

    Membrane Proc Tianjin 300387 Peoples R China;

    Tiangong Univ Natl Ctr Int Joint Res Separat Membranes State Key Lab Separat Membranes &

    Membrane Proc Tianjin 300387 Peoples R China;

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  • 正文语种 eng
  • 中图分类 分离过程;气化工艺;
  • 关键词

    Hydrogel membrane; Desalination; Calcium alginate; Nanofiltration; Dye;

    机译：水凝胶膜;脱盐;藻酸钙;纳滤;染料;

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