Heavy metal ions and organic dyes removal from water by cellulose modified with maleic anhydride

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155

作者：

Y Zhou，Q Jin，X Hu，Q Zhang，T Ma

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摘要：

by the titration method. The adsorption of Hg(II) ions as heavy metal ions while basic fuchsine, methylene blue and crystal violet as organic dyes by CM was investigated. The influence of different experimental parameters such as pH, contact time, temperature on removal process was evaluated. The results indicated that the CM has a good adsorption capacity for Hg(II). The maximum adsorption capacity of Hg(II) was found to be 172.5mgg, and the adsorption process was described by Freundlich isotherm model of adsorption well. The process of basic fuchsine, methylene blue and crystal violet adsorbed by CM was also studied and the adsorption removal rate of those organic dyes was 88.10, 98.47 and 92.85% under the optimum conditions, respectively. The adsorption process was depicted by the Langmuir isotherm model more correctly.

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关键词：

Experimental/ adsorption dyes Fourier transform spectra infrared spectra pH scanning electron microscopy thermal analysis water X-ray diffraction/ heavy-metal ions organic dyes water cellulose-modified maleic anhydride FTIR spectra Fourier transform infrared spectra SEM scanning electron microscopy TGA thermal analysis XRD X-ray diffraction carboxyl group titration method basic fuchsine methylene blue crystal violet pH contact time maximum adsorption capacity Freundlich isotherm model Langmuir isotherm model H 2O Hg/ A6845D Adsorption and desorption kinetics evaporation and condensation A8265M Sorption and accommodation coefficients (surface chemistry) A7830J Infrared and Raman spectra in organic crystals A8245 Electrochemistry and electrophoresis/ H2O/bin H2/bin H/bin O/bin Hg/ads Hg/el