Equilibrium and kinetic modeling of the adsorption: evaluating the performance of adsorbent in softening water for irrigation and animal consumption

Aline Sales Ferreira, Antonébia Alves Mota, Aldayr Melo Oliveira, Francisco Idelbrando Lima Rodrigues, Sara Nóbrega Pacífico, José Eduardo da Silva, Bruno Tavares de Oliveira Abagaro, Gilberto Danta Saraiva, Raimundo Nonato Pereira Teixeira, Vicente de Oliveira Sousa Neto

Resumo


Coconut bagasse, an agricultural solid waste was used as biosorbent for the removal of hardness after alkalized treatment. The adsorption of Ca(II) was studied at pH 6.8. The analysis of the isotherms by the nonlinear model showed that the experimental data were best described by the Temkin model, with lower χ2 value was obtained. The maximum adsorption capacities by Langmuir model was 30.20 mg.g-1.The results using non linear and linear method shown low discrepancy between them to equilibrium study. The results show that the CHA adsorbent can be applied for the removal of Hardness from wastewater.

Palavras-chave


adsorption; mechanism; kinetic; hardness.

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