期刊论文

Rapid oxidation of Fe~(2+) in adsorption tail liquid of in-situ uranium leaching by Acidithiobacillus ferrivorans

Wang, Qingliang(nhwql@sina.com)

中文

化工进展

1000-6613

2018

37

10

3995-4005

10.16085/j.issn.1000-6613.2017-2356

11675072:国家自然科学基金 2016XQD03:南华大学博士科研启动基金

本校为第一机构

为解决中温菌在低温吸附尾液中作氧化剂时生长繁殖慢、氧化Fe~(2+)速率低等问题,实验结合新疆某酸法地浸采铀现场生产实际,选取耐冷嗜酸硫杆菌作为氧化剂,以生物陶粒为挂膜载体,在生物反应器内对细菌进行固定化培养,研究了细菌快速氧化吸附尾液中Fe~(2+)规律.实验结果表明,选用的生物陶粒具有高孔隙率、高透水性、高吸附性和高比表面积等特点,对细菌有较好的吸附固着效果,有利于细菌的生长繁殖,提高了细菌氧化Fe~(2+)速率;生物陶粒在pH 1.6~1.7的吸附尾液中具有较强的耐酸性和稳定性;当通气量为20L/h、吸附尾液温度为17~19℃、流量为500L/h时,生物反应器连续氧化Fe~(2+)速率达到0.85g/(L·h);与...

To solve these problems, such as the slow growth and reproduction of mesophilic bacteria, slow oxidation rate of Fe2+ in the low temperature adsorption tail liquid, based on the field production practice of in-situ leaching uranium by acid method in Xinjiang, Acidithiobacillus ferrivorans was used as the oxidant and the bio-ceramsite was employed as the bio-carrier. Bacteria were immobilized on the surface of bio-ceramsite in the bioreactor. The law of rapid oxidation of Fe2+ in the tail fluid was also studied. The results showed that the selec...