Effective chromium removal from water by polyaniline-coated electrospun adsorbent membrane

被引：155
作者：
Dognani, Guilherme [1 ,2 ]
Hadi, Pejman [2 ,3 ]
Ma, Hongyang [2 ,4 ]
Cabrera, Flavio C. [1 ]
Job, Aldo E. [1 ]
Agostini, Deuber L. S. [1 ]
Hsiao, Benjamin S. [2 ]
机构：
[1] Sao Paulo State Univ UNESP, Sch Technol & Sci, BR-19060900 Presidente Prudente, SP, Brazil
[2] SUNY Stony Brook, Dept Chem, Stony Brook, NY 11794 USA
[3] SUNY Stony Brook, New York State Ctr Clean Water Technol, Stony Brook, NY 11794 USA
[4] Beijing Univ Chem Technol, State Key Lab Organ Inorgan Composites, Beijing 100029, Peoples R China
来源：
CHEMICAL ENGINEERING JOURNAL | 2019年 / 372卷
基金：
中国国家自然科学基金; 美国国家科学基金会; 巴西圣保罗研究基金会;
关键词：
Adsorbent membrane; Chromium removal; Polyaniline; Adsorption; Electrospinning; Nanofibers; HEXAVALENT CHROMIUM; POLYMER ELECTROLYTE; FLUORIDE) MEMBRANES; EFFICIENT REMOVAL; AQUEOUS-SOLUTION; ADSORPTION; CR(VI); REDUCTION; DYE; NANOCOMPOSITE;
D O I：
10.1016/j.cej.2019.04.154
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
Polyaniline (PAni)-coated polyvinylidenefluoride-co-hexafluoropropilene (PVDF-HFP) nanofibrous membranes were fabricated by electrospinning of PVDF-HFP followed by in-situ polymerization of PAni on the nanofiber surface. The resulting membranes with PAni coating were applied for chromium removal, where the efficiency was evaluated as functions of the pH value and adsorption time. Dynamic adsorption tests were also carried out at different flow rates and volumes of chromium in water. It was found that the PAni coating greatly enhanced the chromium removal efficiency with the maximum adsorption capacity being 15.08 mg/g at pH = 4.5. The desorption study further confirmed the recyclability of the PAni coated PVDF-HFP membrane showing an efficiency over 70% even after 5 cycles of usage. The structure and property relationships of these membranes were also characterized by FTIR spectroscopy, capillary flow porometer, water contact angle, scanning electron microscopy and X-ray photoelectron spectroscopy.
引用
收藏
页码：341 / 351
页数：11
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