Biosorption of Cr(VI) by carbonized Eupatorium adenophorum and Buckwheat straw: thermodynamics and mechanism
详细信息 查看全文
- 作者：Jinfa Chen (1)
Ping Yang (2)
Dagang Song (1)
Sha Yang (1)
Li Zhou (1)
Lei Han (1)
Bo Lai (2) - 关键词：Eupatorium adenophorum ; buckwheat straw ; adsorption ; Cr(VI) ; thermodynamics
- 刊名：Frontiers of Environmental Science & Engineering
- 出版年：2014
- 出版时间：December 2014
- 年：2014
- 卷：8
- 期：6
- 页码：960-966
- 全文大小：147 KB
- 参考文献：1. Ma Q, Zhang X L. Advances in new technology for heavy metal wastewater treatment at home and abroad. Chinese Journal of Environmental Engineering, 2007, 1(7): 10-4 (in Chinese)
2. Babel S, Kurniawan T A. Low-cost adsorbents for heavy metals uptake from contaminated water: a review. Journal of Hazardous Materials, 2003, 97(1-): 219-43 CrossRef
3. Kurniawan T A, Chan G Y S., Lo W H, Babel S. Physico chemical treatment techniques for wastewater laden with heavy metals. Chemical Engineering Journal, 2006, 118(1-): 83-8 CrossRef
4. Altundogan H S.Cr(VI) removal from aqueous solution by iron(III) hydroxide-loaded sugar beet pulp. Process Biochemistry, 2005, 40(3-): 1443-452 CrossRef
5. Namasivayam C, Sureshkumar M V. Removal of chromium(VI) from water and wastewater using surfactant modified coconut coir pith as a biosorbent. Bioresource Technology, 2008, 99(7): 2218-225 CrossRef
6. Singh I B, Singh D R. Cr(VI) removal in acidic aqueous solution using iron-bearing industrial solid wastes and their stabilisation with cement. Environmental Technology, 2002, 23(1): 85-5 CrossRef
7. Kobya M. Removal of Cr(VI) from aqueous solutions by adsorption onto hazelnut shell activated carbon: kinetic and equilibrium studies. Bioresource Technology, 2004, 91(3): 317-21 CrossRef
8. Li R H, Zhang Y M, Zhang Z Q, Meng Z F, Tang C L. The characteristics of Cr(VI) adsorbed by walnuts shell powder. Journal of Agro-Environmental Science, 2009, 28(8): 1693-700 (in Chinese)
9. Guo L H, Jeffrey X. S, Tim A G L. Removal of Cr(VI) from aqueous solution using activated carbon modified with nitric acid. Chemical Engineering Journal, 2009, 152(2-): 434-39
10. Lach J, Okoniewska E, Neczaj E, Kacprzak M. Removal of Cr(III) cations and Cr(VI) anions on activated carbons oxidized by CO2. Desalination, 2007, 206(1-): 259-69 CrossRef
11. Yue Z R, Bender S E, Wang JW, Economy J. Removal of chromium Cr(VI) by low-cost chemically activated carbon materials from water. Journal of Hazardous Materials, 2008, 166(1): 74-8 CrossRef
12. ?zdemir E, Durano?lu D, Beker ü, Avc? A ?, Process optimization for Cr(VI) adsorption onto activated carbons by experimental design. Chemical Engineering Journal, 2011, 172(1): 207-18 CrossRef
13. Bishnoi N R, Bajaj M, Sharma N, Gupta A. Adsorption of Cr(VI) on activated rice husk carbon and activated alumina. Bioresource Technology, 2004, 91(3): 305-07 CrossRef
14. Ponou J, Kim J, Wang L P, Dodbiba G, Fujita T. Sorption of Cr(VI) anions in aqueous solution using carbonized or dried pineapple leaves. Chemical Engineering Journal, 2011, 172(2-): 906-13 CrossRef
15. Chen S, Yue Q, Gao B, Li Q, Xu X. Removal of Cr(VI) from aqueous solution using modified corn stalks: Characteristic, equilibrium, kinetic and thermodynamic study. Chemical Engineering Journal, 2011, 168(2): 909-17 CrossRef
16. Chen G Q, Zhang W J, Zeng G M, Huang J H, Wang L, Shen G L. Surface-modified phanerochaete chrysosporium as a biosorbent for Cr(VI)-contaminated wastewater. Journal of Hazardous Materials, 2011, 186(2-): 2138-143 CrossRef
17. Chen S, Yue Q, Gao B, Xu X. Equilibrium and kinetic adsorption study of the adsorptive removal of Cr(VI) using modified wheat residue. Journal of Colloid and Interface Science, 2010, 349(1): 256-64 - 作者单位：Jinfa Chen (1)
Ping Yang (2)
Dagang Song (1)
Sha Yang (1)
Li Zhou (1)
Lei Han (1)
Bo Lai (2)
1. Department of Agricultural Science, Xichang College, Xichang, 615013, China
2. College of Architecture & Environment, Sichuan University, Chengdu, 610065, China - ISSN：2095-221X
文摘
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 determined. Solution pH is found influencing the adsorption. 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 55.19 mg·g? for temperature between 298 K and 308 K under the condition of pH = 1.0. Thermodynamic parameters such as free energy change (ΔG), enthalpy (ΔH) and entropy (ΔS) 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.