Adsorption and migration of uranium from Guangdong associated radioactive solid wastetored soil

Adsorption and migration of uranium from Guangdong associated radioactive solid wastetored soil

Blog Article

BackgroundThe associated radioactivity solid waste (ARSW) is one kind elbeco adu ripstop pants of slight uranium mine with high activity of radioactive nuclides 238U and 232Th.There are few reports about the migration of uranium from ARSW in the literature.There are abundant radioactive mines in Guangdong province.

Therefore, it is of great significance to study the adsorption and migration behavior of uranium from ARSW in Guangdong environment.PurposeThis study aims to investigate the adsorption and migration behavior of uranium in red soil in Guangdong province, hence provide technical support and reference for the treatment of ARSW.MethodsFirstly, the associated radioactive solid wastes were studied by column leaching experiment in 14 cm columns with natural rainwater lasted for 100 days.

And the uranium concentrations migrated into red soil from ARSW were measured.Secondly, the batch dynamic and static adsorption experiments of uranium in red soil were performanced with uranyl nitrate.ResultsThe experimental results show that the uranium leaching rate of ionic acid solid waste, monazite waste and tantalum niobium acid solid waste are click here 41.

1%, 0.015% and 97.8% respectively in natural rain water column leaching experiments.

The migration of uranium in red soil is related to the existence of uranium.The water-soluble uranium (e.g.

, phosphoruranylite) is easier to migrate in red soil and increases with the increase of solubility.The adsorption isotherm of uranyl nitrate in red soil conforms to linear equation with a low partition coefficient Kd and a weak adsorption capacity of the red soilabout uranyl nitrate.ConclusionsIn order to reduce the leaching rate and motility of uranium, the pH of ARSW should be raised to convert the uranium into insoluble form.