Removal of Cr (VI) from aqueous solutions by Acacla nilotica bark

被引：13
|
作者：
Rani, N.
Gupta, A.
Yadav, A. K.
机构：
[1] Indian Inst Technol, Ctr Rural Dev & Technol, New Delhi 110016, India
[2] Guru Jambheshwar Univ, Dept Environm Sci & Engn, Haryana 125001, India
来源：
ENVIRONMENTAL TECHNOLOGY | 2006年 / 27卷 / 06期
关键词：
adsorption; Acacia nilotica bark; adsorption isotherm; chromium;
D O I：
10.1080/09593332708618672
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
Removal of hexavalent Cr from aqueous solutions by bark of Acacia nilotica L. was studied in batch process. Different parameters of adsorption viz. effect of pH, effect of dose and effect of contact time were studied. The percentage removal of Cr (VI) from synthetic sample was found to be 89.0 and 93.1% for 1.0 mm and 0.3 mm Acacia bark carbon (ABC) respectively and 60.9% and 68.1% for 1.0 mm and 0.3 mm Acacia bark untreated (ABU) respectively, in 30 min contact time. The optimum pH for both adsorbents was found to be 2.0 and adsorption equilibrium was found to be 30 min. for both adsorbents. The adsorption process was found to follow first order rate mechanism as well as Freundlich isotherm.
引用
收藏
页码：597 / 602
页数：6
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