期刊论文

Experimental study on the remediation of low concentration uranium wastewater by Sporosarcina pasteurii induced carbonate-uranium co-precipitation

Ding, Dexin(dingdxizzz@163.com)

中文

化工学报

0438-1157

2021

72

10

5354-5361

10.11949/0438-1157.20210533

国家自然科学基金项目（U1967210,11775106,U20A20267）； 湖南省科技人才托举项目（2020TJ-Q03）； 湖南省教育厅重点资助项目（19A436）；

本校为第一机构

对有钙源条件下Sporosarcina pasteurii诱导碳酸盐-铀共沉淀修复低浓度铀废水的性能开展了试验研究。试验结果表明,该细菌能分泌脲酶水解尿素诱导产生方解石并促使其与铀发生共沉淀,使废水中铀的去除率达到95.38%;该细菌能够耐受的铀浓度高达500 mg/L;铀的去除率随Ca~(2+)浓度的升高而增加;温度在30℃左右和碱性环境有利于方解石与铀的共沉淀。对沉淀产物进行XRD、SEM-EDS表征分析表明,其主要成分为方解石,且包含铀元素;消解分析表明,在方解石形成过程中铀以共沉淀的方式被固定到了沉淀产物中。本研究表明, Sporosarcina pasteurii诱导碳酸盐-铀共沉淀对修复低浓度铀废水有潜在应用前景。

Sporosarcina pasteurii induced carbonate-uranium co-precipitation for the remediation of low concentration uranium wastewater under the presence of calcium was studied. The results show that the bacteria can secrete urease to hydrolyze urea to induce calcite and promote its co-precipitation with uranium, so that the removal rate of uranium in wastewater reaches 95.38%. The analysis indicated that Sporosarcina pasteurii was able to tolerate uranium concentrations up to 500 mg/L, while low concentration of uranium had a slight promotion effect on...