Zhang Qinku, Larson Steven L, Ballard John H, Cheah Pohlee, Kazery Joseph A, Knotek-Smith Heather M, Han Fengxiang X
Department of Chemistry and Biochemistry, Jackson State University, 1400 J. R. Lynch Street, Jackson, MS, 39217, USA.
School of Civil Engineering and Shaanxi Key Laboratory of Ecological Restoration in Shanbei Mining Area, Yulin University, Yulin, Shaanxi, 719000, China.
MethodsX. 2019 Dec 3;7:100758. doi: 10.1016/j.mex.2019.11.031. eCollection 2020.
After depleted uranium (DU) is deposited in the environment, it corrodes producing mobile uranium species. The upward transport mechanism in a desert landscape is associated with the dissolution/precipitation of uranium minerals that vary in composition and solubility in soil pore water. The objective of this study is to develop the laboratory column simulation to investigate the upward transport mechanism with cyclic capillary wetting and drying moisture regimes. Results showed that evaporation driven upward transport occurred even during the first 2 months of wetting-drying regimes. Evaporation driven upward transport may control the U movement in the soil profile in an arid climate. The new system did not generate any uranium-containing wastewater. •Simulates the upward transport process of pollutants with different pollution levels and species.•Simultaneously simulate the transport process of multiple pollutants simultaneously.•Evaluate the influence of biogeochemical factors on pollutant transport such as various cations and anions (Ca, Mg and carbonates) in water.
贫铀（DU）沉积在环境中后会发生腐蚀，产生可移动的铀物种。沙漠环境中的向上迁移机制与铀矿物在土壤孔隙水中的溶解/沉淀有关，这些铀矿物的成分和溶解度各不相同。本研究的目的是开发实验室柱模拟，以研究在周期性毛细润湿和干燥水分条件下的向上迁移机制。结果表明，即使在干湿循环的前两个月，蒸发驱动的向上迁移也会发生。在干旱气候下，蒸发驱动的向上迁移可能控制土壤剖面中铀的移动。新系统不会产生任何含铀废水。•模拟不同污染水平和种类污染物的向上迁移过程。•同时模拟多种污染物的迁移过程。•评估生物地球化学因素对污染物迁移的影响，如水样中的各种阳离子和阴离子（钙、镁和碳酸盐）。
