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- W2025707910 abstract "The present study reports the effect of contact time, nature of electrolyte, and temperature on the sorption kinetics of Cd2+ by manganese dioxide, which is the most active oxide in soils and sediments. The sorption kinetics of Cd2+ by manganese dioxide is evaluated at pH 6 in different electrolytes in the temperatures range 293-323 K. The solid samples are equilibrated in 0.45 mmol.L−1 Cd2+ and different electrolytes at pH 6. The results indicate that sorption of Cd2+ increases with time and temperature and the system attains equilibrium within 60 min in KNO3 as the electrolyte. However, in the presence of 0.001 M KH2PO4 sorption of Cd2+ increases and the time for equilibrium shifts to 90 min. The data second-order kinetics model and the calculated rate constant k and initial sorption rate h increases with increasing temperature phosphate treatment. Among the calculated thermodynamic activation parameters the positive values of ΔH‡ and ΔG‡ show the sorption process to be endothermic and nonspontaneous, w..." @default.
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- W2025707910 date "2015-02-09" @default.
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- W2025707910 title "Spectroscopic and Thermodynamic Analysis of Cd2+Ion Sorption Kinetics by Manganese Dioxide in the Presence of Oxyanions" @default.
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- W2025707910 doi "https://doi.org/10.1080/01496395.2014.978942" @default.
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