| Biosorption of Cr（VI） by carbonized Eupatorium adenophorum and Buckwheat straw： thermodynamics and mechanism |
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| 作者姓名： | Jinfa CHEN ;Ping YANG ;Dagang SONG ;Sha YANG ;Li ZHOU ;Lei HAN ;Bo LAI |
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| 作者单位： | [1]Department of Agricultural Science, Xichang College, Xichang 615013, China; [2]College of Architecture & Environment, Sichuan University, Chengdu 610065, China |
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| 基金项目： | Acknowledgements This research was supported by a grant from the Applied Basic Research Programs of Science and Technology Department of Sichuan Province （No. 2013JY0131）. |
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| 摘 要： | High quality and low cost carbon can be prepared from Eupatorium adenophorum （E. adenophorum） and Buckwheat straw. The biosorbent was used for Cr（VI） removal. The effect of experimental parameters, such as pH, sorbent dosage and temperature were examined and the optimal experimental condition was determned. Solution pH is found influencing the adsorp- tion. Cr（VI） removal efficiency is found to be maximum （98%） at pH= 1. Langmuir and Freundlich adsorption isotherms were applicable to the adsorption process and their constants were evaluated. The adsorption data obtained agreed well with the Langmuir sorption isotherm model. The maximum adsorption capacities for Cr（VI） ranged from 46.23 to 55.19mg.g^-1 for temperature between 298 K and 308 K under the condition of pH = 1.0. Thermodynamic parameters such as free energy change （AG）, enthalpy （AH） and entropy （AS） indicate a spontaneous, endothermic and increased randomness nature of Cr（VI） adsorption. Studies found that the raw E. adenophorum and buckwheat straw mixed materials with simple treatment had a high efficiency for the removal of Cr（VI） and would be a promising adsorbent.
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| 关 键 词： | 铬(VI) 生物吸附剂 热力学参数 紫茎泽兰 稻草 荞麦 碳化 Langmuir |
Biosorption of Cr(VI) by carbonized Eupatorium adenophorum and Buckwheat straw: thermodynamics and mechanism |
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| Jinfa CHEN,;Ping YANG,;Dagang SONG,;Sha YANG,;Li ZHOU,;Lei HAN,;Bo LAI.Biosorption of Cr(VI) by carbonized Eupatorium adenophorum and Buckwheat straw: thermodynamics and mechanism[J].Frontiers of Environmental Science & Engineering,2014,8(6):960-966. |
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| Authors: | Jinfa Chen Ping Yang Dagang Song Sha Yang Li Zhou Lei Han Bo Lai |
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| Institution: | 1. Department of Agricultural Science, Xichang College, Xichang, 615013, China
2. College of Architecture & Environment, Sichuan University, Chengdu, 610065, China
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| Abstract: | Eupatorium adenophorum, buckwheat straw, adsorption, Cr（VI）, thermodynamics |
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| Keywords: | Eupatorium adenophorum buckwheat straw adsorption Cr（VI） thermodynamics |
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