Characterization and Biosorption Performance of Silver by Bacillus Licheniformis

被引：0
作者：
Bian Xiao-Jing [1 ]
Ke Zhi-Bin [1 ]
Zhong Chao [1 ]
Luo Yun-Han [1 ]
Liu Ming-Hua [1 ]
Cheng Yang-Jian [1 ]
机构：
[1] Fuzhou Univ, Coll Environm & Resources, Fuzhou 350108, Fujian, Peoples R China
来源：
CHINESE JOURNAL OF STRUCTURAL CHEMISTRY | 2019年 / 38卷 / 01期
基金：
中国国家自然科学基金;
关键词：
silver; precious metal; biosorption; Bacillus licheniformis; EXTRACELLULAR BIOSYNTHESIS; HEXAVALENT CHROMIUM; PRECIOUS METALS; RECOVERY; MECHANISM; NANOPARTICLES; SURFACES; BIOMASS; IONS; IMMOBILIZATION;
D O I：
10.14102/j.cnki.0254-5861.2011-2053
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
The demand of silver is increasing rapidly in recent decades, because silver and its related products are widely used in modern industry and decoration. It is necessary to recover silver from waste water using an efficient and environmental friendly method due to its environmental and economic benefits. In this paper, we eliminated the interference of Cl and light conditions, and then studied the characterization and biosorption performance of silver by Bacillus licheniformis. The max biosorption amount was 87.4 mg/g (dry weight) with the initial Ag+ concentration of 100 mg/L at pH 6.0. XRD pattern showed that the product was an amorphous compound. SEM/EDS-mapping and FT-IR results implied that phosphate, amino and carboxyl groups located on the cell walls involved in the biosorption of Ag+. The XPS spectra result showed that the value of E-B of Ag( )3d(5/2) (367.51 eV) corresponded to the energy values for Ag (I), and indicated Ag+ adsorbed to the surface of cell still maintained mono-valence. The results confirm that B. licheniformis just adsorb Ag+ but cannot covert soluble Ag+ to silver nano-particles (AgNP).
引用
收藏
页码：61 / 68
页数：8
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