The influence of humic substances on uranium biomineralization induced by Bacillus sp. dwc-2

Hong Tu; Tu Lan; Guoyuan Yuan; Changsong Zhao; Jun Liu; Feize Li; Jijun Yang; Jiali Liao; Yuanyou Yang; Dongqi Wang; Ning Liu

doi:10.1016/j.jenvrad.2018.11.010

The influence of humic substances on uranium biomineralization induced by Bacillus sp. dwc-2

J Environ Radioact. 2019 Feb:197:23-29. doi: 10.1016/j.jenvrad.2018.11.010. Epub 2018 Nov 28.

Authors

Hong Tu¹, Tu Lan², Guoyuan Yuan³, Changsong Zhao⁴, Jun Liu⁵, Feize Li⁶, Jijun Yang⁷, Jiali Liao⁸, Yuanyou Yang⁹, Dongqi Wang¹⁰, Ning Liu¹¹

Affiliations

¹ Key Laboratory of Radiation Physics and Technology (Sichuan University), Ministry of Education, Institute of Nuclear Science and Technology, Sichuan University, Chengdu, 610064, PR China. Electronic address: tuhonghao@163.com.
² Key Laboratory of Radiation Physics and Technology (Sichuan University), Ministry of Education, Institute of Nuclear Science and Technology, Sichuan University, Chengdu, 610064, PR China; CAS Key Laboratory of Nuclear Radiation and Nuclear Energy Techniques, Multidisciplinary Initiative Centre, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, 100049, PR China. Electronic address: Lantu_scu@163.com.
³ Key Laboratory of Radiation Physics and Technology (Sichuan University), Ministry of Education, Institute of Nuclear Science and Technology, Sichuan University, Chengdu, 610064, PR China. Electronic address: hdyyzdt@126.com.
⁴ Key Laboratory of Radiation Physics and Technology (Sichuan University), Ministry of Education, Institute of Nuclear Science and Technology, Sichuan University, Chengdu, 610064, PR China. Electronic address: 528752750@qq.com.
⁵ Key Laboratory of Radiation Physics and Technology (Sichuan University), Ministry of Education, Institute of Nuclear Science and Technology, Sichuan University, Chengdu, 610064, PR China. Electronic address: 935749070@qq.com.
⁶ Key Laboratory of Radiation Physics and Technology (Sichuan University), Ministry of Education, Institute of Nuclear Science and Technology, Sichuan University, Chengdu, 610064, PR China. Electronic address: lifeize@163.com.
⁷ Key Laboratory of Radiation Physics and Technology (Sichuan University), Ministry of Education, Institute of Nuclear Science and Technology, Sichuan University, Chengdu, 610064, PR China. Electronic address: jjyang@scu.edu.cn.
⁸ Key Laboratory of Radiation Physics and Technology (Sichuan University), Ministry of Education, Institute of Nuclear Science and Technology, Sichuan University, Chengdu, 610064, PR China. Electronic address: liaojiali@scu.edu.cn.
⁹ Key Laboratory of Radiation Physics and Technology (Sichuan University), Ministry of Education, Institute of Nuclear Science and Technology, Sichuan University, Chengdu, 610064, PR China. Electronic address: yangyy@scu.edu.cn.
¹⁰ CAS Key Laboratory of Nuclear Radiation and Nuclear Energy Techniques, Multidisciplinary Initiative Centre, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, 100049, PR China. Electronic address: dwang@ihep.ac.cn.
¹¹ Key Laboratory of Radiation Physics and Technology (Sichuan University), Ministry of Education, Institute of Nuclear Science and Technology, Sichuan University, Chengdu, 610064, PR China. Electronic address: nliu720@scu.edu.cn.

PMID: 30502659
DOI: 10.1016/j.jenvrad.2018.11.010

Abstract

In this paper, the influence of humic acid (HA) and fulvic acid (FA) on biomineralization behaviour was evaluated. The results showed HA and FA did not obviously inhabit or promote the precipitation of U-phosphate minerals. The data from molecular dynamic simulation indicated that the free energy for the dissociation of uranyl the PO₄^3- -uranyl was 202.49 kJ/mol, which was much larger than that form HA-uranyl (88.3 kJ/mol). These simulated results revealed the less competitiveness of HA and FA with PO₄^3- for uranyl and explained why HA and FA had less impacted on the formation of U-phosphate minerals. However, the influence of HA/FA on the morphology was obvious, the microstructure of the bio-minerals changed from small particles to lamellar stacking structure with the addition of HA or FA. The findings of this study are helpful for us to gain a better understanding natural U-phosphate biomineralization behaviour.

Keywords: Bacillus; Biomineralization; Humic substance; Uranium.

MeSH terms

Bacillus / metabolism*
Biomineralization*
Humic Substances*
Minerals
Soil Pollutants, Radioactive / metabolism*
Uranium / metabolism*

Substances

Humic Substances
Minerals
Soil Pollutants, Radioactive
Uranium