Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

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中国有色金属学报(英文版)

Transactions of Nonferrous Metals Society of China

Vol. 17    No. 4    August 2007

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Adsorption of Ag(Ⅰ) on H2TiO3 from aqueous solutions
CHAI Li-yuan(柴立元)1, WEI Shun-wen(韦顺文)1,
PENG Bing(彭 兵)1, LI Zhu-ying(李竹英)2

1. School of Metallurgical Science and Engineering, Central South University,
Changsha 410083, China;
2. Yiwu Bureau of Quality and Technical Supervision, Yiwu 322000, China

Abstract:Adsorption of silver ions from aqueous solution onto H2TiO3 was studied. Equilibrium experimental studies were performed to determine the adsorption capacity of H2TiO3 for silver ion at various pH values. Batch experiments were conducted in the range of pH value 3−7 and silver ions concentration 10−200 mg/L. The results show that the adsorption is strongly dependent on pH value. The equilibrium absorption capacity of H2TiO3 increases significantly with the increase of pH value from 3 to 7. The adsorption of silver ion obeys the Langmuir isothermal equation well in the concentration range studied, the adsorption constant is 0.054 7, 0.052 4, 0.088 1 at pH 5, 6 and 7, respectively, and the maximum adsorption capacities are 23.64, 29.76 and 40.82 mg/g.

 

Key words: silver ions; adsorption; hydrous titania

ISSN 1004-0609
CN 43-1238/TG
CODEN: ZYJXFK

ISSN 1003-6326
CN 43-1239/TG
CODEN: TNMCEW

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