Adsorption behavior of hexavalent chromium in aqueous solution by polyvinylimidazole modified cellulose
作者： Xiong Peng , Zongcheng Yan , Lihua Hu , Rongze Zhang , Shujun Liu
DOI: 10.1016/J.IJBIOMAC.2019.11.086
关键词: Fourier transform infrared spectroscopy 、 Hexavalent chromium 、 Cellulose 、 Adsorption 、 Chemistry 、 Aqueous solution 、 Nuclear chemistry 、 Langmuir adsorption model 、 Imidazole 、 Ion exchange
摘要: Abstract Developing multifunctional adsorbent materials is an effective solution to hexavalent chromium (Cr (VI)) pollution. In this study, 3D macroporous with the synergetic advantages of cellulose and polyvinylimidazole were fabricated through a homogeneous method, served as adsorbents for Cr (VI) elimination in aqueous solution. The physicochemical properties designed studied by SEM, FTIR, 13C NMR, XPS, CHN element analysis, results confirmed that imidazole groups successfully grafted onto cellulose. influences different water chemistry conditions, including contact time, temperature, initial pH value, coexisting ion concentration, on adsorption performance modified studied, corresponding mechanism was explored. optimized showed fast rate (0.12 g/(mg∙min)), high ability (134 mg/g). process spontaneous conformed Langmuir isotherm pseudo-second kinetic models. uptake primarily controlled electrostatic attraction, exchange, redox. These suggest promising candidate detoxification (VI).
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