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<p>The present paper involved the desorption study of chemicals contributing to COD and Color from exhausted activated char prepared from Neem leaf powder (AC-NLP). In this desorption investigation, previously exhausted AC-NLP in column mode for removal of COD and color from textile wastewater was utilized. The batch desorption experiments were carried out for ten sorption cycles with 250.0&#xa0;mL eluent for 8&#xa0;h at room temperature (293&#xa0;K). For selection of proper eluent, several anionic, cationic and organic solvents as an eluent were employed in batch experiment. Four kinetic models i.e. Pseudo First-, Pseudo Second-Order, Intra-Particle, and Elovich isotherms were used to determine the kinetic desorption of chemicals contributing to COD and Color in batch study. In column study, elution and sorption breakthrough curves, several sorption and elution process parameters, and activity-indicators equation were performed using 0.1 N NaOH at bed height of 20&#xa0;cm and flow rate of 10&#xa0;mL/min for ten sorption cycles. Maximum desorption capacities were achieved upto 97.5% and 100% using batch and column mode respectively.</p>

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Sustainable Desorption Study of Chemicals Contributing to COD and Color from Activated Char Prepared from Neem Leaf in Textile Wastewater

  • 期刊论文

  • 发表日期：

    2025年5月29日

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  • Himanshu Patel

摘要

The present paper involved the desorption study of chemicals contributing to COD and Color from exhausted activated char prepared from Neem leaf powder (AC-NLP). In this desorption investigation, previously exhausted AC-NLP in column mode for removal of COD and color from textile wastewater was utilized. The batch desorption experiments were carried out for ten sorption cycles with 250.0 mL eluent for 8 h at room temperature (293 K). For selection of proper eluent, several anionic, cationic and organic solvents as an eluent were employed in batch experiment. Four kinetic models i.e. Pseudo First-, Pseudo Second-Order, Intra-Particle, and Elovich isotherms were used to determine the kinetic desorption of chemicals contributing to COD and Color in batch study. In column study, elution and sorption breakthrough curves, several sorption and elution process parameters, and activity-indicators equation were performed using 0.1 N NaOH at bed height of 20 cm and flow rate of 10 mL/min for ten sorption cycles. Maximum desorption capacities were achieved upto 97.5% and 100% using batch and column mode respectively.