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Citation: XIA Mengling, SUN Xiaomei, HUANG Bing, LI Buhai. Hg(Ⅱ) Adsorption Behavior of Waste Beer Yeast Modified with Triethylenetetramine[J]. Chinese Journal of Applied Chemistry, ;2011, 28(11): 1317-1322. doi: 10.3724/SP.J.1095.2011.00691 shu

Hg(Ⅱ) Adsorption Behavior of Waste Beer Yeast Modified with Triethylenetetramine

1.
Key Laboratory of Analytical Chemistry of The State Ethnic Affairs Commission, College of Chemistry and Material Science, South-Central University for Nationalities, Wuhan 430074

Corresponding author: LI Buhai,
Received Date: 22 November 2010
Available Online: 25 March 2011
Fund Project: 国家民委院校科研基金资助项目(MJY00004) (MJY00004)

A new biosorbent from waste beer yeast was prepared by modification with triethylenetetramine and crosslinking with glutaraldehyde. The adsorption capability of the modified yeast for Hg(Ⅱ) in aqueous solution and the influence factors were studied. The results show that the optimized pH value was 2.8 at 25℃ and the adsorption process was carried out for 20 min. The maximum uptake capacities for Hg(Ⅱ) is 132.6 mg/g, which is about 6.3 times higher than that of the pristine yeast. With the modified yeast, the average removal rate for Hg(Ⅱ) in the wastewater is 100%. The kinetics for Hg(Ⅱ) adsorption followed the pseudo-second-order with R²=0.999 9. The adsorption process fitted the Langmuir model, indicating that it is a monolayer adsorption process.
- triethylenetetramine,
- waste beer yeast,
- modification,
- adsorption,
- Hg(Ⅱ)
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