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- W2900010733 abstract "The in-situ leaching of ionic rare earth minerals often causes serious nitride pollution in the mining area and surrounding areas. In this paper, the rare earth soil in the Zu Dong mining area of Long Nan, Gan Zhou city, was used as the research object. Through batch equilibrium adsorption tests, the adsorption properties of ammonium nitrogen in different sizes of rare earth soils, the adsorption dynamics and thermodynamics of ammonium nitrogen under different concentrations of ammonium sulfate solution, and the effect of the solution flow rate and concentration in the soil column under dynamic conditions on the adsorption of ammonium on the soil was systematically studied. The results showed that in different diameters of rare earth soils, the adsorption capacity was: clay (within 0.074 mm) > fine sand (range 0.074 to 0.25 mm) > sand (beyond 0.25 mm) > original soil (12.37% clay, 43.9% sandy soil, and 31.56% fine sand), indicating that the clay in the original soil played a major role; the adsorption of ammonium nitrogen in ionic rare earth soils satisfied the Langmuir model (the fitted R2 values all greater than 0.9), and the dynamics satisfied the quasi-second-order dynamics equation (the fitted R2 values all greater than 0.95), which showed that the adsorption of ammonium nitrogen in soil was monolayer adsorption and dominated by chemical adsorption process; the concentration of ammonia nitrogen, the speed of leaching, and the content of cations such as rare earths all play an important role in the adsorption of ammonia nitrogen in rare earths." @default.
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- W2900010733 date "2018-11-05" @default.
- W2900010733 modified "2023-09-25" @default.
- W2900010733 title "Adsorption properties of rare earth soils on Ammonium Nitrogen" @default.
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- W2900010733 doi "https://doi.org/10.1088/1755-1315/191/1/012096" @default.
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