摘要
研究了氧化亚铁硫杆菌在黄铁矿、黄铜矿、方铅矿和闪锌矿表面的吸附情况,结果表明,氧化亚铁硫杆菌在4种硫化矿物表面的吸附无明显选择性;溶液初始pH值对氧化亚铁硫杆菌在4种硫化矿物表面的吸附几乎无影响,但酸性环境有利于吸附的发生;细胞悬浮液浓度为0.1-1.0 g/L、矿浆浓度为15 g/L以上和温度为20-30℃是氧化亚铁硫杆菌在4种硫化矿物表面吸附的较适宜条件。扫描电子显微镜检测结果显示,氧化亚铁硫杆菌细胞表面的荚膜是重要的吸附位。红外光谱分析结果表明,氧化亚铁硫杆菌细胞表面含有-OH、-NH2、C O、C=O等活性基团,它们在吸附过程中起重要作用。
The adsorption of Thiobacillus ferrooxidans on the surface of pyrite, chalcopyrite, galena and sphalerite are studied. The results indicate that Thiobacillus ferrooxidans has unobvious selective adsorption on the surface of these four sulphide minerals. The initial pH of solution has little influence on the adsorption of ThiobaciUus ferrooxidans on the surface of sulphide minerals, but an acidic medium will be more propitious to the adsorption. A bacterium density of 0.1 - 1. 0 g/L, mineral slurry concentration above 15 g/L and temperature between 20 -30 ℃ are favorable to the adsorption. SEM result indicates that the ectoblast on the surface of Thiobacillus ferrooxidans is the important site for the adsorption. IR spectrum shows that the functional groups such as -OH, -NH2 , C =O, C-O play an important role in the adsorption process.
出处
《金属矿山》
CAS
北大核心
2007年第8期34-38,共5页
Metal Mine
基金
国家自然科学基金项目(编号:50174014)
辽宁省自然科学基金项目(编号:20042021)
辽宁省高科技计划项目(编号:2006223002)。
关键词
氧化亚铁硫杆菌
硫化矿物
吸附
Thiobacillus ferrooxidans, Sulphide mineral, Selective adsorption
