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In this work, the removal of Congo red dye from its aqueous solution by a low-cost adsorbent obtained from Perna viridis sea shell, an aquacultural solid waste, was studied. Maximum removal of 98% of the dye was obtained with adsorbent dosage 22 g L−1, pH of 5.5, contact time of 30 min and temperature of 308.5 K. Various adsorption reaction models were investigated and found that the pseudo-second-order...
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