China's progress in radionuclide migration study over the past decade (2010–2021): Sorption, transport and radioactive colloid

Chen, Zongyuan; Wang, Siyuan; Hou, Huijuan; Chen, Kang; Gao, Pengyuan; Zhang, Zhen; Jin, Qiang; Pan, Duoqiang; Guo, Zhijun; Wu, Wangsuo

doi:10.1016/j.cclet.2022.02.054

Cited by 16 publications

(1 citation statement)

References 79 publications

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“…Contamination of surface water and groundwater by radioactive elements such as uranium, cesium, and strontium is caused by several factors. Among these factors are the obtaining of environmentally hazardous toxicants into groundwater from the mining industry, tailings storage facilities, nuclear power plant accidents, and radioactive waste disposal sites from block waters of radioactive sites of nuclear power plants [1][2][3][4][5][6][7][8]. As a result, the ecological balance is disturbed.…”

Section: Introductionmentioning

confidence: 99%

The Effect of High-Energy Ball Milling of Montmorillonite for Adsorptive Removal of Cesium, Strontium, and Uranium Ions from Aqueous Solution

Kovalchuk,

Zakutevskyy,

Sydorchuk

et al. 2023

Eng

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Clay minerals are widely used to treat groundwater and surface water containing radionuclides. In our study, the method of mechanochemical activation for increasing the sorption capacity of the natural clay mineral montmorillonite was used. By adjusting the grinding time, the increasing sorption parameters of mechanochemically activated montmorillonite were determined. X-ray diffraction method, scanning electron microscopy, and the determination of the specific surface by low-temperature adsorption–desorption of nitrogen to characterize the natural and mechanochemical-activated montmorillonites were used. It was established that the maximal sorption of uranium, strontium, and cesium is found for montmorillonite after mechanochemical treatment for 2 h. It is shown that the filling of the surface of montmorillonite with ions of different natures occurs in various ways during different times of mechanochemical treatment. The appropriateness of the Langmuir and Freundlich models for the sorption parameters of uranium, strontium, and cesium ions on montmorillonite after its mechanochemical activation was established. The effect of natural organic substances—humic acids—on the efficiency of water purification from uranium on mechanoactivated montmorillonite was studied. The obtained sorbents can be effectively used for the removal of trace amounts of radionuclides of different chemical natures (uranium, cesium, and strontium) from polluted surface and ground waters.

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