摘要
酸性地浸矿山退役后,采区范围内地下水中依旧存在着少量铀的残留需要清除,以恢复地下水环境。使用一株新的普通脱硫弧菌Desulfovibrio vulgaris GnLF21,开展了影响其除铀能力的因素及对废水稀释液的处理研究。结果表明,初始U^(6+)浓度为4 mg/L、pH=7.0、初始SO_(4)^(2-)浓度为1.0 mg/L时,菌株去除铀能力最强,铀去除率分别为97.9%、96.8%、92.7%。在废水pH为4.5、SO_(4)^(2-)浓度≤2 g/L、初始U^(6+)浓度为1.87 mg/L、菌株GnLF21接种量20%时,在96 h和120 h时铀去除率分别为77.74%和80.73%。可应用异源性硫酸盐还原菌开展酸性含铀废水的生物修复。
After acid in-situ leaching mines decommissioning,there is still a small amount of uranium residue in the underground water within the mining area,which needs to be removed to restore the groundwater environment.One sulfur reducing bacteria(SRB)strain of Desulfovibrio vulgaris isolated and purified from a landfill site leachate,named GnLF21,was used to investigate the factors affecting its uranium removal capacity and the treatment efficiency for diluted raw groundwater.The results show that when the initial concentration of U^(6+) is 4 mg/L,pH value is 7.0,and initial concentration of SO_(4)^(2-) is 1.0 mg/L,the uranium removal rate is 97.9%,96.8% and 92.7%,respectively.Uranium removal rate at 96 h and 120 h is 77.74% and 80.73% respectively under the conditions including pH value of 4.5,SO_(4)^(2-) concentration of≤2 g/L,initial U^(6+) concentration of 1.87 mg/L,and GnLF21 inoculation amount of 20%.Desulfovibrio vulgaris GnLF21 can be used to carry out biological remediation of acidic uranium-containing wastewater.
作者
李斐
孙占学
刘亚洁
王健
刘淼
陈诗怡
LI Fei;SUN Zhan-xue;LIU Ya-Jie;WANG Jian;LIU Miao;CHEN Shi-yi(State Key Laboratory of Nuclear Resources and Environment,East China University of Technology,Nanchang 330013,China;School of Water Resources and Environmental Engineering,East China University of Technology,Nanchang 330013,China)
出处
《有色金属（冶炼部分）》
CAS
北大核心
2022年第7期138-143,共6页
Nonferrous Metals（Extractive Metallurgy)
基金
国防科技工业局核设施退役及放射性废物治理科研项目(G20210004)
国家自然科学基金资助项目(41772266)
江西省自然科学基金资助项目(20212BAB213007)
2020年度江西省研究生创新专项资金资助项目(YC2020-S490)。
关键词
硫酸盐还原菌
普通脱硫弧菌
铀去除率
酸性含铀废水
sulfur reducing bacteria
Desulfovibrio vulgaris
uranium removal rate
acidic uranium-containing wastewater
