Adsorption of Copper (Cu2+) Ions from Aqueous Solution by Non-Crosslinked and Crosslinked Chitosan-Coated Bentonite Beads

Chia Nan University of Pharmacy & Science Institutional Repository > 環境永續暨休閒學院 > 環境工程與科學系(所) > 會議論文 > Item 310902800/22017

jsp.display-item.identifier=請使用永久網址來引用或連結此文件: https://ir.cnu.edu.tw/handle/310902800/22017

標題:	Adsorption of Copper (Cu2+) Ions from Aqueous Solution by Non-Crosslinked and Crosslinked Chitosan-Coated Bentonite Beads
作者:	Ana Francia V. Mariano Maria Lourdes P. Dalida Meng-Wei Wan Chi-Chuan Kan Chih-Hsiang Liao
貢獻者:	環境工程與科學系
關鍵字:	bentonite chitosan crosslinking epichlorohydrin Langmuir
日期:	2008-06
上傳時間:	2009-11-27 15:50:17 (UTC+8)
摘要:	The adsorption of Cu ions from aqesous solution by non-crosslinked and crosslinked chitosan-coated bentonite (CCB) beads was investigated in a batch system, including the effects of contact time (0.5, l, 2, 4, 6, 12 and 24 hours), pH of solution (1, 2, 3, 4 and 5), initial Cu ion concentration (100, 500, 1000 and 2000) and crossl inking. Epichlorohydrin was used to obtain beads that are insoluble in acidic solutions. Experimental results indicated that non-crosslinked CCB beads showed higher adsorption capacity than crosslinked CCB beads in the entire pH range studied. The initlal Cu solution concentration and the solution pH affected the adsorption capacity, i. e., increased initial Cu concentration and pH resulted to increased adsorption capacity. The equilibrium data were analyzed using Langmuir and Freundlich isotherm models. Equilibrium adsorption data correlated well with Langmuir isotherm model, with maximum monolayer adsorption capacities of 12.21, 10.50, 9.64 and 1.03 mg Cu/g CCB beads for non-crosslinked CCB beads and 9.43, 9.26, 8.42 and 2.61 mg Cu/g CCB beads for crosslinked CCB beads at pH4, 3, 2 and 1 respectively. The kinetic data was tested using pseudo-first and -second order reaction. The kinetic experirnental data followed pseudo-second order reaction which indicated that the chemical sorption was the rate-limiting step. The Cu ions were desorbed from the crosslinked CCB beads by strong HCI acid (pH 1), which suggested that crosslinked CCB beads can be regenerated and reused to adsorb metal ions.
關聯:	2008 Asian~Pacific Regional Conference on Practical Environmental Technologies，起迄日：2008/6/30~2008/7/1，地點：Quezon City, Philippines
显示于类别:	[環境工程與科學系(所)] 會議論文

文件中的档案:

档案	描述	大小	格式	浏览次数
97_164_pro.pdf		4800Kb	Adobe PDF	413	检视/开启

在CNU IR中所有的数据项都受到原著作权保护.

TAIR相关文章

数据加载中.....