摘要
氰化酵母(Zygosaccharomyces rouxiiCICC1379)具有脱除水溶液中重金属镉的能力。比较了在YEPD培养基中正常培养和氯化钠胁迫培养对Z.rouxiiCICC1379生物量及其镉脱除的影响。结果表明,随着NaCl浓度增高,生物量降低,但酵母镉脱除率增大。在pH2-7下15%NaCl胁迫培养的酵母镉脱除率均比正常培养的显著提高(P<0.001)。酵母处理后的镉溶液pH发生了变化,在pH4.00-6.99范围内,pH均趋向于其相同浓度氯化镉溶液的自然pH。扫描电镜观察发现150g/L NaCl胁迫培养60h的酵母较正常培养24h的酵母个体小且芽痕少。
Cadmium in aqueous solution can be absorbed by the salt-tolerant yeast Zygosaccharomyces rouxii CICC1379. Effect of Z. rouxii CICC1379 from the YEPD medium without or with different content NaCl on the biomass and cadmium removal rate were evaluated respectively. The results are shown as follows： with the NaCl concentration increased, the biomass of the yeast decreased, however, the cadmium removal rate increased. In every of the pH 2 - 7 of cadmium solution, cadmium removal rate by the yeast from the 150 g/L NaCl stress cultivation were obviously higher than that from the normal （P 〈 0. 001 ）. The pH of cadmium solution was changed after the biosorption. The pH inclined to the natural pH of cadmium solution treated by the biosorption during pH 4.00 - 6.99. The size of the individual yeast from the 150 g/L NaCl stress cultivation was smaller and less scab than that from the normal cultivation as visualized by SEM.
出处
《食品与发酵工业》
CAS
CSCD
北大核心
2009年第8期11-14,共4页
Food and Fermentation Industries
基金
教育部博士点基金新教师项目(200804231032)
教育部博士点基金项目(20070423020)
中国海洋大学SRTP项目(0811010701)资助
关键词
酵母
鲁氏酵母
镉离子
吸附
脱除
胁迫培养
Yeast, Zygosaccharomyces rouxii, stress cultivation, cadmium, biosorption, removal
