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Citation: Fu Jin-Zhou, Liu Yue-Ying, Gu Ping-Ying, Shang Ding-Liang, Lin Zhong-Yu, Yao Bing-Xin, Weng Sheng-Zhou. Spectroscopic Charcterization on the Biosorption and Bioreduction of Ag(I) by Lactobacillus sp.A09*[J]. Acta Physico-Chimica Sinica, ;2000, 16(09): 779-782. doi: 10.3866/PKU.WHXB20000904 shu

Spectroscopic Charcterization on the Biosorption and Bioreduction of Ag(I) by Lactobacillus sp.A09*

1.
State Key Laboratory for Physical Chemistry of Solid Surface,Deprtment of Biology,Department of Chemistry Ximen Uuiversity,Xiamen 361005

Received Date: 23 May 2000
Available Online: 15 September 2000

Some characteristics of Ag＋ biosorption and bioreduction by Lactobacillus sp. A09 biomass were reported. The optimum pH value of Ag＋ biosorption by strain A09 was 4.5. Temperature(6～ 50 ℃) did not affect the biosorption. The biosorptive efficiency (91％) and biosorptive capacity(Ag＋ 125 mg• g－ 1 dry weight biomass ) were achieved under the conditions of Ag＋ 100 mg• L－ 1, biomass 800 mg• L－ 1, pH 4.5 and 30 ℃ for 24 h contact. TEM analysis indicated that A09 biomass could reduce Ag＋ to Ag0 as Ag particles on the surface of cells. IR spectroscopy showed that － CO2－ and － HN－ C=O on the surface of cells may involve in the precession for adsorbing Ag＋ .
- Lactobcillus,
- Silver,
- Biosorption,
- Bioreduction,
- Characterization
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