Adsorption of 2,4,6-trichlorophenol by multi-walled carbon nanotubes as affected by Cu(II).
作者： Guang-Cai Chen , Xiao-Quan Shan , Yu-Sheng Wang , Bei Wen , Zhi-Guo Pei
DOI: 10.1016/J.WATRES.2009.03.002
关键词: Adsorption 、 Solvation shell 、 Sorption 、 Chemical engineering 、 Absorption spectroscopy 、 Organic chemistry 、 2,4,6-Trichlorophenol 、 Absorption (chemistry) 、 Chemistry 、 Carbon 、 Carbon nanotube
摘要: Adsorption equilibrium of 2,4,6-trichlorophenol (TCP) on multi-walled carbon nanotubes (MWCNTs) was investigated to explore the possibility using MWCNTs for concentration, detection and removal TCP from contaminated water. The adsorption at pH 4 nonlinear, reversible best fit by a Polanyi-Manes model. Oxidation treatment increased surface area introduced hydrophilic carboxylic groups defect sites MWCNTs, hence sorption Cu(II) individually. suppressed oxidized MWCNTs15A, but had little effect as-grown MWCNTs15. no influence either. mechanisms suppression are ascribed formation complexes Cu(II), which verified X-ray absorption spectroscopy. exerts cross-linking functional adjacent tubes, creating more tightly knit bundle suppressing condensation in pore spaces between tubes. large hydration sphere around may also intrude or shield sites, leading "crowding out" Cu(II)-complexed sites. (C) 2009 Elsevier Ltd. All rights reserved.
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