Application of coconut shell, banana peel, spent coffee grounds, eucalyptus bark, piassava (Attalea funifera) and water hyacinth (Eichornia crassipes) in the adsorption of Pb2+ and Ni2+ ions in water
Ivea Krishna da Silva Correia, Pitágoras Fonseca Santos, Caroline Santos Santana, Jordan Brizi Neris, Francisco H.M. Luzardo, Fermin G. Velasco