期刊论文

Ding, D.(dingdxzzz@163.com)

中文

化工学报

0438-1157

2012

63

5

1584-1591

10.3969/j.issn.0438-1157.2012.05.037

国家自然科学基金项目（1097507）； 湖南省自然科学基金项目（10JJ2033）； 湖南省教育厅资助科研项目（09C863）~~；

本校为第一且通讯机构

为了解培养基种类、培养温度和pH值等因素对黑曲霉产生的混合有机酸浸出铀矿石的影响,从铀矿山水样中分离、纯化得到了一株真菌——黑曲霉,应用马铃薯-蔗糖培养基(potato sucrose agar,PSA)和葡萄糖-玉米浆培养基(dextrose corn syrup,PCS)进行黑曲霉培养,获得了不同培养温度下产生的pH值不同的黑曲霉产混合有机酸,并将之作为浸出剂用于浸铀实验研究.研究表明,黑曲霉产生的有机酸的主要组分为草酸和柠檬酸等有机酸,培养基种类的不同会影响黑曲霉所产有机酸的浸铀效果,采用PSA培养基培养的黑曲霉产生的有机酸浸铀效果更好(p＜0.05).培养温度和混合有机酸的pH值也会对黑曲霉代谢产物的铀浸出率有显...

Leaching uranium ores by fungi is a promising new bioleaching approach, and organic acids play key roles. However, little is known about the relationships between uranium leaching rate and organic acids produced by fungi. To explore the effects of medium types, culture temperature and pH value on uranium leaching by organic acids from Aspergillus niger, a strain of them was separated and purified from some water samples from a uranium mine. PSA and PCS medium were used for culture of Aspergillus niger, and mixed organic acids with different pH value produced by Aspergillus niger at diverse cul...