生物矿化
铀酰
化学
铀
磷酸盐
磷酸盐矿物
腐植酸
降水
核化学
环境化学
矿物学
化学工程
无机化学
生物化学
材料科学
有机化学
离子
冶金
气象学
工程类
物理
肥料
作者
Hong Tu,Tu Lan,Guoyuan Yuan,Changsong Zhao,Jun Li,Feize Li,Jijun Yang,Jiali Liao,Yuanyou Yang,Dongqi Wang,Ning Liu
标识
DOI:10.1016/j.jenvrad.2018.11.010
摘要
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 PO43- -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 PO43- 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.
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