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DOI:	10.1371/journal.pone.0137086
论文题名:	Chromium Biosorption from Cr(VI) Aqueous Solutions by Cupressus lusitanica Bark: Kinetics, Equilibrium and Thermodynamic Studies
作者:	Alma Rosa Netzahuatl-Muñoz; María del Carmen Cristiani-Urbina; Eliseo Cristiani-Urbina
刊名:	PLOS ONE
ISSN:	1932-6203
出版年:	2015
发表日期:	2015-9-9
卷:	10, 期:9
语种:	英语
英文关键词:	Adsorption ; Isotherms ; Aqueous solutions ; Chemical equilibrium ; Thermodynamics ; Sorption ; Chromium ; Water pollution
英文摘要:	The present study investigated the kinetics, equilibrium and thermodynamics of chromium (Cr) ion biosorption from Cr(VI) aqueous solutions by Cupressus lusitanica bark (CLB). CLB total Cr biosorption capacity strongly depended on operating variables such as initial Cr(VI) concentration and contact time: as these variables rose, total Cr biosorption capacity increased significantly. Total Cr biosorption rate also increased with rising solution temperature. The pseudo-second-order model described the total Cr biosorption kinetic data best. Langmuir´s model fitted the experimental equilibrium biosorption data of total Cr best and predicted a maximum total Cr biosorption capacity of 305.4 mg g-1. Total Cr biosorption by CLB is an endothermic and non-spontaneous process as indicated by the thermodynamic parameters. Results from the present kinetic, equilibrium and thermodynamic studies suggest that CLB biosorbs Cr ions from Cr(VI) aqueous solutions predominantly by a chemical sorption phenomenon. Low cost, availability, renewable nature, and effective total Cr biosorption make CLB a highly attractive and efficient method to remediate Cr(VI)-contaminated water and wastewater.
URL:	http://journals.plos.org/plosone/article/file?id=10.1371/journal.pone.0137086&type=printable
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资源类型:	期刊论文
标识符:	http://119.78.100.158/handle/2HF3EXSE/22172
Appears in Collections:	过去全球变化的重建影响、适应和脆弱性科学计划与规划气候变化与战略全球变化的国际研究计划气候减缓与适应气候变化事实与影响

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journal.pone.0137086.PDF（2448KB）	期刊论文	作者接受稿	开放获取	CC BY-NC-SA	View Download

作者单位:

Departamento de Ingeniería Bioquímica, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, México, D.F., México;Universidad Politécnica de Tlaxcala, San Pedro Xalcaltzinco, Tepeyanco, Tlaxcala, México;Universidad Autónoma de Chiapas, Tuxtla Gutiérrez, Chiapas, México;Departamento de Ingeniería Bioquímica, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, México, D.F., México

Recommended Citation:

Alma Rosa Netzahuatl-Muñoz,María del Carmen Cristiani-Urbina,Eliseo Cristiani-Urbina. Chromium Biosorption from Cr(VI) Aqueous Solutions by Cupressus lusitanica Bark: Kinetics, Equilibrium and Thermodynamic Studies[J]. PLOS ONE,2015-01-01,10(9)

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