Pt^(4+)生物吸附作用的谱学表征  

Spectroscopic Characterization on Pt^(4+)Biosorption

作　　者：林种玉[1] 周朝晖[1] 吴剑鸣[1] 薛茹[1] 程琥[1] 王琪[1] 刘月英[2] 傅锦坤[1] 

机构地区：[1]固体表面物理化学国家重点实验室,厦门大学化学系,福建厦门361005 [2]厦门大学生物学系,福建厦门361005

出　　处：《厦门大学学报（自然科学版）》2003年第5期612-616,共5页Journal of Xiamen University：Natural Science

基　　金：国家基础研究发展规划(001CB108906);自然科学基金(29876026;29743001)资助

摘　　要：对休眠的巨大芽孢杆菌(Bacillusmegatherium)D01菌体吸附Pt4+的作用过程进行了表征.TEM和XPS展示Pt4+沉积的主要部位是菌体细胞壁并在其表面逐步被还原为Pt0.FTIR表明D01菌体细胞壁肽聚糖层肽链上的酰胺键、肽链侧链的氨基酸残基离子化羧基以及糖类化合物的羟基为吸附Pt4+的活性基团;肽聚糖层部分多糖的水解产物还原糖,其游离态的醛基为电子供体,将Pt4+原位还原成Pt0.Some characteristics of Pt4+ biosorption by resting cell of Bacillus megatherium D01 biomass have been reported. TEM micrograph and XPS spectra of platinumloaded D01 biomass showed that platinum deposited on the cell and revealed that Pt4+ was reduced to Pt0. FTIR spectra demonstrated that active groups such as amido bond, ionized carboxyl group of remnant aminoacid and hydroxyl group of saccharides from the peptidoglycan layer on the cell wall seem to be the sites for Pt4+binding; free aldehyde group from reducing sugars, i.e., hydrolysates of polysaccharides on the peptidoglycan layer, serving as the electron donor, in situ reduced Pt4+to Pt0. 

关 键 词：Pt^4+ 铂离子 生物吸附作用 谱学表征 巨大芽孢杆菌 非酶法生物还原 环境治理 贵金属回收 

分 类 号：X172[环境科学与工程—环境科学]