Abstract
Abstract Wastewater from electroplating industry is composed of heavy metals. Adsorption is an effective method treating this type of hazardous wastewater. Many works studied adsorption of single metal ion however industrial wastewater is always multicomponent system. As a consequence, this work aimed to study the competitive adsorption of copper, nickel, and chromium ions onto amine functionalized SBA-15. It was found that adsorption capacity increased with an increase of pH. Moreover, removal efficiency of metal ion decreased when initial metal concentration increased. To represent the adsorption data, Langmuir, Freundlich, extended Langmuir, and modified competitive Langmuir models were selected. Their SSEs (Sum of squared errors) were 98.58, 118.40, 165.84, and 156.18, respectively.
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