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- W3215858912 abstract "Abstract The present work aims to evaluate the performance of raw marl collected from the region of Oum El Bouaghi on the elimination of KMnO 4 from aqueous solution. The adsorption capacities were studied using the batch technique as a function of pH, initial concentration and temperature. The maximum adsorption for KMnO 4 was found to be 83.517% at pH 3.0. When the pH is low (pH<3.0), the uptake of KMnO 4 occurs with an electrostatic attraction between the MnO 4 -ions and the surface proton groups, while at pH ≥3.0-8.0, the formation of complexes with the surface functional groups during the adsorption process and/or cation exchange are responsible for retention of Mn(II) ions onto marl. Experimental adsorption data were modeled with different nonlinear isotherms and kinetic models. Furthermore, statistical errors (SSE, SD, ARE, χ 2 , R 2 and R 2 adj ) were calculated to choose the suitable model. Langmuir isotherm was found to be best for fitting the experimental data. The calculated thermodynamic parameters indicated that adsorption process was physical, spontaneous and endothermic in nature. From this work, it was concluded that the natural marl can be used for effective elimination of KMnO 4 from aqueous solution and wastewater." @default.
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- W3215858912 date "2021-11-01" @default.
- W3215858912 modified "2023-10-18" @default.
- W3215858912 title "Nonlinear regression for analysis of the uptake of KMnO4 from aqueous solutions onto natural marl" @default.
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- W3215858912 doi "https://doi.org/10.1088/1757-899x/1204/1/012003" @default.
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