物理化学学报 >> 2000, Vol. 16 >> Issue (09): 779-782.doi: 10.3866/PKU.WHXB20000904

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乳酸杆菌A09吸附还原Ag(I)的谱学表征

傅锦坤, 刘月英, 古萍英, 汤丁亮, 林种玉, 姚炳新, 翁绳周   

  1. 固体表面物理化学国家重点实验室,厦门大学生物系,厦门大学化学系,厦门361005
  • 收稿日期:2000-05-23 修回日期:2000-06-21 发布日期:2000-09-15
  • 通讯作者: 傅锦坤 E-mail:wdzhang@jingxian.xmu.edu.cn

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

Fu Jin-Zhou, Liu Yue-Ying, Gu Ping-Ying, Shang Ding-Liang, Lin Zhong-Yu, Yao Bing-Xin, Weng Sheng-Zhou   

  1. State Key Laboratory for Physical Chemistry of Solid Surface,Deprtment of Biology,Department of Chemistry Ximen Uuiversity,Xiamen 361005
  • Received:2000-05-23 Revised:2000-06-21 Published:2000-09-15
  • Contact: Fu Jin-Zhou E-mail:wdzhang@jingxian.xmu.edu.cn

关键词: 乳酸杆菌, 银, 生物吸附, 生物还原, 表征

Abstract:

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+ .

Key words: Lactobcillus, Silver, Biosorption, Bioreduction, Characterization