文献类型：期刊文献

中文题名：金精矿生物氧化过程中菌体吸附的重要性研究

英文题名：Importance of the Bacterial Adhesion During the Biooxidation Processing Gold Concentrates

作者：孙理鑫[1,2];张旭[1,2];谭文松[1,2];朱明龙[1,2];刘瑞强[3];李春强[3]

机构：[1]华东理工大学生物工程学院;[2]生物反应器工程国家重点实验室;[3]山东天承生物金业有限公司

年份：2012

卷号：41

期号：1

起止页码：92

中文期刊名：金属矿山

外文期刊名：Metal Mine

收录：CSTPCD;;Scopus;北大核心:【北大核心2011】；

基金：国家高技术研究发展计划(863计划)项目(编号:2007AA060904)

语种：中文

中文关键词：难处理金精矿;生物氧化;嗜酸性氧化亚铁硫杆菌;吸附

外文关键词：Refractory gold concentrate; Biooxidation; Acidithiobacillus ferrooxidans; Adhesion

摘要：利用改进装置探索了无菌以及嗜酸性氧化亚铁硫杆菌分别吸附于矿石表面、游离于培养基中等条件下,矿石氧化过程的基本工程学特征。结果表明,菌体吸附氧化时,溶液中的Eh值和矿石的氧化率高于游离菌氧化和无菌氧化;电镜观察可见矿石表面菌体吸附留下的蚀坑;A.ferrooxidans游离氧化时的矿石氧化率大于无菌氧化过程。六偏磷酸钠的加入能改变矿石表面的电性,提高菌体在矿石表面的吸附率。
Several sulfide mineral oxidation experiments were carried out,which the mineral oxidized by free suspended cell,partly adhesion cell,adhesion cell and abiotic.Variations in the concentrations of iron ions and bacteria,redox potential were monitored in the mineral oxidation systems.The results show that the Eh value and the mineral oxidation when the bacteria adhered are higher than those when the bacteria suspended and abiotic.The surface morphology of the mineral before and after oxidation is observed.There are obviously several holes on the mineral surface which caused by the adhered cell.The mineral oxidation by free suspended cell is higher than that in abiotic condition.Sodium hexametaphosphate added could change the electrical properties of the mineral surface and promote the percentage of cell adhesion on the mineral.