Adsorptive Removal of Ni(Ⅱ) Ions from Aqueous Solution by Polyacrylic Acid/Attapulgite Composite Hydrogels
Polyacrylic acid/attapulgite (PAA/ATP) composite hydrogels used for removal of heavy metal ions from aqueous solution was synthesized via radical polymerization with acrylic acid (AA) and attapulgite (ATP) modified by hydrochloric acid as adsorbent.Chemical composition of the modified ATP was characterized by Fourier transform infrared spectroscopy (FT-IR) and X-ray diffraction (XRD) and the morphology of the PAA/ATP hydrogels was characterized by scanning electron microscope (SEM), respectively.The swelling ratio, pH-sensitivity and adsorption performance of Ni(Ⅱ) ions of the composite hydrogels were studied.The results showed the swelling ratio of the PAA/ATP composite hydrogels was higher than that ofPAA hydrogels and the composite hydrogels displayed sensitivity to pH values with a sharp increase of swelling ratio when the pH values increased from 4 to 6.Comparing with PAA hydrogels, the composite hydrogels obtained a larger adsorption capacity of Ni(Ⅱ) ions, the average adsorption capacity could reach 72.8 mg/g and adsorption ratio could reach 84%.
Composite hydrogels Adsorption Ni(Ⅱ) ions Polyacrylic acid Attapulgite
Yi-wei Zheng Wen-wen Tao Gui-fang Zhang Chao Lv Yi-ping Zhao Li Chen
State Key Laboratory of Separation Membranes and Membrane Processes, School of Materials Science and Engineering, Tianjin Polytechnic University, Tianjin 300387, China
国际会议
The 2016 China Functional Materials Technology and Industry Forum (2016中国国际功能材料大会暨第九届中国功能材料及其应用学术会议)
重庆
英文
859-865
2016-07-25（万方平台首次上网日期，不代表论文的发表时间）