Several studies have been conducted to evaluate and to improve wastewater treatment. Among the contaminants in wastewater, toxic metals stand out and their removal by adsorption process is of great interest. Silver and copper binary adsorption on bentonite was evaluated in the present work, using a...

Several studies have been conducted to evaluate and to improve wastewater treatment. Among the contaminants in wastewater, toxic metals stand out and their removal by adsorption process is of great interest. Silver and copper binary adsorption on bentonite was evaluated in the present work, using a fixed bed dynamic system. Initially, a fluid dynamic study was performed with different flow rates and efficiency and mass transfer parameters were analyzed. Using the optimum flow rate, the effects of initial concentration and molar fraction were investigated according to the same parameters, besides metals removal. Next, two adsorption and desorption cycles were performed using nitric acid as eluent. Regenerated clay, after elution with nitric acid, was characterized in order to verify morphology, thermal stability, functional groups and crystal structure

FUNDAÇÃO DE AMPARO À PESQUISA DO ESTADO DE SÃO PAULO - FAPESP

2013/00732-1; 2013/25212-0

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