期刊
POLYMER BULLETIN
卷 77, 期 9, 页码 4917-4935出版社
SPRINGER
DOI: 10.1007/s00289-019-02998-3
关键词
Gum gellan; Grafting; Swelling behavior; Dye adsorption; Kinetic models
资金
- University Grants Commission (UGC), New Delhi, India [F.15-1/2017/PDFWM-2017-18-HIM-51703(SA-II)]
- Department of Science and Technology (DST)
- Department of Science and Technology (DST) (Govt. of India) [EMR/2016/001103]
- PURSE-II grant
The present work highlights the microwave-assisted synthesis of novel superabsorbent gum gellan cross-linked poly(acrylic-co- methacrylic acid) hydrogel [GG-cl-poly(AA-co-MAA)] prepared by the simultaneous graft copolymerization using ammonium persulfate as the initiator and N,N '-methylene-bis-acrylamide as the cross-linker for the removal of cationic dyes [malachite green (MG) and methylene blue (MB)]. The GG and hydrogel were studied by using Fourier-transform infrared spectroscopy, scanning electron microscopy, and X-ray diffraction spectroscopic techniques. Swelling studies were conducted out in various concentrations of initiator, monomer, and cross-linker. The outstanding dye removal efficiency of 99% for MG and 95% for MB was found at the initial dye concentration of 50 mg L-1 with an adsorbent dose of 500 mg within the time duration of 6 h and 25 degrees C. The adsorption kinetics data for both MG and MB dyes exhibited the pseudo-first-order kinetics.
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