抗重金属镉微生物特性的研究  

Study of characterization of cadmium resistance microorganism

作　　者：卢福芝[1] 李启虔[1] 刘王辉[1] 周婷婷[1] 李罗春 李静兰[1] 

机构地区：[1]河池学院化学与生命科学系,广西宜州546300

出　　处：《河池学院学报》2015年第5期34-39,共6页Journal of Hechi University

基　　金：广西高等学校科研项目(201204LX396);河池学院青年科研项目(2013A-N005);河池学院环境工程专业硕士点建设学科资助项目(2015HJA001)

摘　　要：以实验室保藏的抗镉淡紫拟青霉菌(Paecilomyces lilacinus)LLC4为出发菌株,研究培养温度,初始p H,不同Cd2+浓度对其生长的影响以及不同Cd2+浓度对其生长中p H及吸附率的影响。研究结果表明,菌株LLC4最适培养温度和初始p H分别为28℃和8;低浓度Cd2+对菌株LLC4的生长有一定的促进作用,当初始培养Cd2+浓度为10 mmol/L时,其有较好生长量;随培养液中Cd2+浓度增加,菌株LLC4在培养过程p H变化范围变小;菌株LLC4对Cd2+的吸附率随Cd2+浓度的增加而降低,在初始Cd2+浓度为5 mmol/L时,培养48 h后对Cd2+的吸附率最大,达65.17%。The study takes the Paecilomyces lilacinus LLC4 preserved in the laboratory was as the starting strain. The influence of culture tempreture, pH and different concentrations of Cd^2＋ on the growth of strain LLC4 are studied. The influence of different concentrations of Cd^2＋ on pH and adsorption rate of culturing strain LLC4 are tested too. The research results show that the optimum culture temperature is 28℃ and the optimum culture pH is 8. The strain LLC4 grous better with low concentration Cd^2＋ of the medium. The best growth quantity will be got when the initial concentration of Cd^2＋ is 10 mmol/L. The pH variation range is narrower with the increase of Cd^2＋ concentration of medium. The adsorption rate of Cd^2＋ decreases with the increase of Cd^2＋ concentration. When the initial concentration of Cd^2＋ is 5 mmol/L,the maximal Cd^2＋ adsorption rate by the strain LLC4 reaches 65.17% after culturing 48 h.

关 键 词：镉 抗性微生物 特性 

分 类 号：Q89[生物学] X503.23[环境科学与工程—环境工程]