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Physicochemical characterization of raw and modified banana pseudostem fibers and their adsorption capacities for heavy metal Pb 2+ and Cd 2+ in water
Author(s) -
Sheng Zhanwu,
Shen Yixiao,
Dai Haofu,
Pan Siyi,
Ai Binling,
Zheng Lili,
Zheng Xiaoyan,
Xu Zhimin
Publication year - 2018
Publication title -
polymer composites
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.577
H-Index - 82
eISSN - 1548-0569
pISSN - 0272-8397
DOI - 10.1002/pc.24140
Subject(s) - adsorption , cellulose , hemicellulose , crystallinity , lignin , materials science , thermal stability , metal , metal ions in aqueous solution , nuclear chemistry , raw material , fiber , chemical engineering , composite material , chemistry , organic chemistry , metallurgy , engineering
The banana pseudostem fiber was modified by steam explosion and cellulose xanthogenation methods to enhance the capacity of absorbing heavy metal ions Pb 2+ and Cd 2+ . The surface morphologies of the steam exploded (SEBF) and cellulose xanthogenate (SEBF‐CX) modified fibers were in loose form and had more surface area. The intensity of –CH, CO, CC, or COC group in SEBF or SEBF‐CX was lower due to hemicellulose and lignin were reduced after the modification, while the cellulose crystallinity and thermal stability were increased based on X‐ray diffraction and thermal analysis. SEBF had higher adsorption capacity at Pb 2+ concentration below 100 mg/L. However, SEBF‐CX exhibited higher capacity at high concentration of Pb 2+ . SEBF‐CX had higher adsorption capacity of removing Cd 2+ as well. The adsorption kinetic of SEBF‐CX was fit to the pseudo second‐order. In general, SEBF‐CX could be used as an economical and efficient absorbent for removing heavy metal ion pollutes in water. POLYM. COMPOS., 39:1869–1877, 2018. © 2016 Society of Plastics Engineers