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• W3211135429 endingPage "106695" @default.
• W3211135429 startingPage "106695" @default.
• W3211135429 abstract "The knowledge of adsorption and desorption mechanisms of phosphate onto construction wastes is important to minimize environmental concerns related to its discharge into water. In this study, we verified the adsorption and desorption capacity of red ceramic waste in the removal of phosphate from aqueous solution, unmodified (RC), chemically (CAC, dolomite lime) and thermochemically (TCAC, heated/dolomite lime) pre-activated. Adsorption process was best described by pseudo-first-order kinetic model for RC (1.22 mg g−1) and CAC (3.59 mg g−1) and by pseudo-second-order model for TCAC (4.57 mg g−1) at pH 5.3. Pseudo-second-order model better described desorption for RC (1.13 mg g−1) and pseudo-first-order model for CAC (0.54 mg g−1) and TCAC (0.54 mg g−1) at pH 13.3. Regarding the maximum adsorption capacities, Langmuir model best fitted to RC with 2.27 mg g−1; Freundlich model to CAC with 4.10 mg g−1; and Sips model to TCAC with 22.28 mg g−1 at pH 5.3. Sips model was best fitted to the desorption equilibrium data with 16.72 mg g−1 for RC, 15.45 mg g−1 for CAC, and 5.20 mg g−1 for TCAC at pH 13.3. The negative ΔH° showed the exothermic nature of adsorption for RC (−159.75 kJ mol−1), CAC (−108.59 kJ mol−1) and TCAC (−102.89 kJ mol−1). For desorption, the exothermic nature was verified for RC (−34.06 kJ mol−1) and TCAC (−44.11 kJ mol−1); while endothermic process was noted for CAC (9.61 kJ mol−1). Finally, the red ceramic, both unmodified and pre-activated, could be used as alternative low-cost adsorbent in the removal of phosphate." @default.
• W3211135429 created "2021-11-08" @default.
• W3211135429 creator A5011058607 @default.
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• W3211135429 creator A5079367091 @default.
• W3211135429 date "2021-12-01" @default.
• W3211135429 modified "2023-10-01" @default.
• W3211135429 title "Adsorption and desorption of phosphate onto chemically and thermochemically pre-activated red ceramic waste: Characteristics, batch studies, and mechanisms" @default.
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• W3211135429 doi "https://doi.org/10.1016/j.jece.2021.106695" @default.
• W3211135429 hasPublicationYear "2021" @default.
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