五种典型浸矿微生物的耐氟性状对比研究  

Comparative Study of Fluoride-tolerance of Five Typical Bioleaching Microorganisms

作　　者：李乾[1,2] 丁德馨[1,2] 王清良[1,2] 史文革[1,2] 胡鄂明[1,2] 李会娟[1,2] 马丽媛[3] 肖云花[3] 曹杨[1] 刘学端[3] 

机构地区：[1]南华大学核资源工程学院,湖南衡阳421001 [2]南华大学铀矿冶生物技术国防重点学科实验室,湖南衡阳421001 [3]中南大学资源加工与生物工程学院,湖南长沙410083

出　　处：《南华大学学报（自然科学版）》2013年第2期16-22,共7页Journal of University of South China：Science and Technology

基　　金：国家自然科学基金资助项目(31070104;51154003);南华大学博士科研启动基金资助项目(2012XQD05)

摘　　要：在微生物冶金体系中,浸矿环境的压力很可能超出了浸矿菌种的耐受能力,提高浸矿菌种的耐受性是一个极具挑战性的难题.氟化物对微生物的生长具有很强的抑制或杀死作用.在本文所研究的五种浸矿细菌中,A.ferrooxidans的氟耐受性是最好的,其次是A.thiooxidans,再次是L.ferriphilum与A.caldus,最差的是S.thermosulfi-dooxidans.由此看出,中度嗜热浸矿菌比常温浸矿菌更容易被氟离子抑制.In microbial leaching systems, the microbial tolerance cannot generally bear the environmental stress. Fluoride to a large extent could inhibit the growth and activity of the microbes,or even kill the microbes. The growth state and iron/sulfur oxidation activities of five representive bioleaching microorganisms （ A. ferrooxidans ATCC 23270, L. ferriphilumYSK,S. thermosulfidooxidans ST,A. thiooxidans A01 ,A. caldus S1 ） upon different fluoride stress were compared. It showed that the fluoride tolerance of A.ferrooxidans was the best, A. thiooxidans was the second, L. ferriphilum and A. caldus was the third, S. thermosulfi- dooxidans was the worst. Additionally, moderate thermophiles were inhibited more than me- sophiles.

关 键 词：浸矿微生物 氟耐受性 铁 硫氧化活性 

分 类 号：TL212.12[核科学技术—核燃料循环与材料]