화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Journal of Industrial and Engineering Chemistry, Vol.46, 222-233, February, 2017
DOI10.1016/j.jiec.2016.10.034  Export Citation
Adsorption of hexavalent chromium onto Bamboo Charcoal grafted by Cu2+-N-aminopropylsilane complexes: Optimization, kinetic, and isotherm studies
Yunhai Wu†, Zhu Ming1, Shengxin Yang1, Yiang Fan1, Peng Fang1, Haitao Sha1, and Ligen Cha1
  • Key Laboratory of Integrated Regulation and Resources Development of Shallow Lakes, Ministry of Education, Hohai University, Xikang Road #1, Nanjing, 210098, China, Korea
  • 1College of Environment, Hohai University, Xikang Road #1, Nanjing, 210098, China
E-mail:
The adsorption mechanism of Cr(VI) uptake onto Bamboo Charcoal grafted by Cu2+-N-aminopropylsilane complexes (BC/Cu-N) was investigated. The properties of BC/Cu-N were characterized using XRD, FTIR, SEM, EDS, potentiometric acid.base titration and electrochemical analysis. Results indicated that the framework integrity of BC was kept aftermodification and the quantity of functional groups on BC/Cu-N surface has changed. There existed functional groups on the BC/Cu-N which could consume OH- and the pHpzc was found to be 6.20. Moreover, electrochemical analysis showed that new electron transfer pathway was imported. Parameters such as pH, initial Cr(VI) concentration, adsorbent dosage and temperature were optimized using RSM. Analysis of variance of the quadratic model for Cr(VI) was suitable to predict the adsorption of Cr(VI) (F value = 134.23 and P value < 0.001) with a high correlation (R2 = 0.9921). The results showed that the initial Cr(VI) concentration and the adsorption capacity of Cr(VI) were positively related. Adsorption data of Cr(VI) were better fitted by Sips, Temkin and D-R models with the maximum adsorption capacity of 17.9383 mg/g. In addition, the pseudo second-order kinetic model was found to be more suitable for the adsorption of Cr(VI).
Keywords:Bamboo charcoal;Cr(VI);Response surface methodology;Adsorption
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