Development and characterization of a new adsorbent based on Jerivá coconut (Syagrus romanzoffiana) applied for removing toxic metals from water
Joceane Pigatto, Danieli Brandler, Gabriel André Tochetto, Deisy M. Memlak, Gean Delise Leal Pasquali Vargas, Alcione Aparecida de Almeida Alves, Liziane Schittler Moroni, Aniela Pinto Kempka, Cleuzir da Luz, Adriana Dervanoski
Abstract
ABSTRACT This study developed a new adsorbent based on Jerivá coconut (Syagrus romanzoffiana), palm native from the Brazilian Atlantic Forest, for application in the monocomponent removal of toxic metallic ions present in a synthetic water matrix, such as Ni 2+ , Cd 2+ , Cu 2+ , and Zn 2+ . The characterization and experimental data showed that the raw material of natural source is a potential adsorbent. The adsorption trials showed that the developed adsorbent has affinity for the metallic ions and they preferably followed the Langmuir model. The adsorption was influenced by temperature. Greater adsorption capacity occurred for Ni 2+ , followed by Cu 2+ , Cd 2+ , and Zn 2+ . The thermodynamic parameters, such as AH°, AS°, and AG° indicated endothermal, spontaneous, and favorable adsorption for ions Ni 2+ , Cd 2+ , and Zn 2+ , and non-spontaneous for Cu 2+ . The results demonstrated that the adsorbent has potential for use in the treatment process of supply water contaminated with toxic metals.