Effective treatment of dye wastewater via positively charged TETA-MWCNT/PES hybrid nanofiltration membranes
Effective treatment of dye wastewater via positively charged TETA-MWCNT/PES hybrid nanofiltration membranes
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DOI：
10.1016/j.seppur.2017.11.070
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发表时间：
2018-04-03
影响因子：
8.6
通讯作者：
Bakhtiari, Omid
中科院分区：
文献类型：
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作者：
Peydayesh, Mohammad;Mohammadi, Toraj;Bakhtiari, Omid
将三乙烯四胺（TETA）功能化的多壁碳纳米管（MWCNT）引入聚醚砜（PES）基体中，制备了荷正电杂化纳滤膜。在最佳纳米粒子负载率为0.4wt%时，制得的膜的孔径为0.73nm，截留分子量（MWCO）为570 Da，纯水通量（PWF）为84.35L/m2·h，与纯PES相比提高了130%。对于盐截留率，遵循R（MgCl 2）> R（MgSO 4）> R（Na 2 SO 4）> R（NaCl）的顺序，这证实了膜的正电荷性质。该膜对罗丹明B和结晶紫的截留率分别为99.23%和98.43%，对靛蓝胭脂红和橙子G的截留率分别为87.12%和82.13%。除了在其机械和热稳定性的改进，由于更低的表面粗糙度和更高的亲水性，杂化膜的亲水性也增强。
Positively charged hybrid nanofiltration membrane were prepared by the incorporation of Triethylenetetramine (TETA) functionalized multiwall carbon nanotube (MWCNT) into Polyethersulfone (PES) matrix. In the best nanoparticles loading ratio of 0.4 wt%, the fabricated membrane exhibits a pore diameter of 0.73 nm, a molecular weight cut off (MWCO) of 570 Da and a pure water flux (PWF) of 84.35 L/m(2) h which shows 130% improvement compared to the neat PES. Regarding salts rejection, it follows the order R (MgCl2) > R (MgSO4) > R (Na2SO4) > R (NaCl) which confirms positively charge nature of the membranes. Furthermore, the prepared membrane demonstrates effective rejection for two cationic dyes i.e. Rhodamine B (99.23%) and Crystal violet (98.43%) and acceptable rejection for two anionic dyes i.e. Indigo carmine (87.12%) and Orange G (82.13%). In addition of improvements in their mechanical and thermal stabilities, antifouling nature of the hybrid membranes enhances as well due to lower surface roughness and higher hydrophilicity.