面包酵母菌吸附黄铜矿微生物浸出矿液中Cu^(2+)的试验研究  

Research on Bread Yeast Adsorption Cu^(2+) of Chalcopyrite Bioleaching Fluid

作　　者：李靓洁[1,2] 董发勤[2] 谌书[1,2] 张伟[2] 

机构地区：[1]西南科技大学环境与资源学院,四川绵阳621010 [2]西南科技大学固体废物处理与资源化教育部重点实验室,四川绵阳621010

出　　处：《矿物学报》2013年第2期163-169,共7页Acta Mineralogica Sinica

基　　金：国家科技支撑计划项目(2007BAB18B06)

摘　　要：选用面包酵母菌为吸附菌株,研究了菌株吸附黄铜矿微生物浸出矿液中Cu2+的吸附富集过程,探讨了吸附试验中pH值、温度和初始菌体加入量对Cu2+吸附效果的影响。结果表明:在酵母菌吸附Cu2+的过程中,菌体细胞上的蛋白质酰胺和多糖等成分更多地参与了吸附Cu2+的过程,Cu2+与菌体表面的有机基团结合形成颗粒物沉淀附着在细胞壁上。菌株动力学吸附分析中发现,实验用各菌株对Cu2+的动力学吸附过程除了受菌株种属的影响外,还应与菌株的细胞壁形貌、菌株本身的生长状况的等因素相关。在pH=4.5、t=30℃、初始菌体加入量8.0 g/L的条件下,吸附反应14 h后酵母菌的最佳铜吸附率可达66.64%,面包酵母菌可以吸附富集黄铜矿微生物浸出矿液中的Cu2+,可以有效回收低品位黄铜矿中的铜资源。Bread Yeast preserved in the key Laboratory of solid waste was selected as adsorption strains in this research.The influence of pH,temperature and the initial inoculation amount on the adsorption rate of Cu2＋ was studied during the chalcopyrite bioleaching fluid biosorption process.The results show that the composition of bacterial cells such as protein and polysaccharide involved more in the process of yeast adsorbing Cu2＋.Cu2＋ and organic groups on the bacterial cell surface combined and formed particles precipitate attaching to the cell wall.The kinetic analysis showed that the kinetic process of yeast adsorbing Cu2＋ was affected by the strain species,morphology of cell walls and growing status of strains and other related factors.When the pH=4.5 and 30 ℃,initial inoculation amount was 8.0 g/L,the copper adsorption rate was up to 66.64% after the yeast adsorption reaction carried on 14 h.Bread yeast adsorbs Cu2＋ of chalcopyrite bioleaching fluid can effectively recycle copper resources from the low grade chalcopyrite.

关 键 词：低品位铜矿 黄铜矿 铜回收 面包酵母菌 细菌吸附 

分 类 号：P579[天文地球—矿物学] TF18[天文地球—地质学]