Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10603259 | Carbohydrate Polymers | 2013 | 7 Pages |
Abstract
Virgin cotton stalk was produced into an effective biosorbent for perchlorate adsorption. Surface analysis including BET surface area and SEM illustrated the reduction of porous structure in amine-crosslinked cotton stalk (AC-CS). Elemental and zeta potential analysis validated the graft of some positively charged amine groups on surface of AC-CS. Spectra analysis (XPS, FTIR and Raman spectra) suggested that interaction between AC-CS and ClO4â should be based on electrostatic attraction. The maximum adsorption capacity (qmax) of AC-CS for perchlorate at different pHs (3.0, 6.0, 9.0 and 11.0) were calculated as 29.6, 42.6, 41.0 and 33.0Â mg/g, respectively. The saturated perchlorate uptakes in column were in range of 25.0-38.1Â mg/g at different pHs. In addition, the exhausted AC-CS column was regenerated by 0.5Â mol/L of NaCl solution, which was adequate for almost complete desorption of the perchlorate.
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Authors
Xing Xu, Baoyu Gao, Xin Tan, Xiaoxiao Zhang, DongTing Yue, Qinyan Yue,