Fate And Transport With Material Response Characterization Of Green Sorption Media For Copper Removal Via Desorption Process

Keywords

Adsorption media; Copper removal; Desorption; Material characterization; Stormwater management

Abstract

Multiple adsorption and desorption cycles are required to achieve the reliable operation of copper removal and recovery. A green sorption media mixture composed of recycled tire chunk, expanded clay aggregate, and coconut coir was evaluated in this study for its desorptive characteristics as a companion study of the corresponding adsorption process in an earlier publication. We conducted a screening of potential desorbing agents, batch desorption equilibrium and kinetic studies, and batch tests through 3 adsorption/desorption cycles. The desorbing agent screening revealed that hydrochloric acid has good potential for copper desorption. Equilibrium data fit the Freundlich isotherm, whereas kinetic data had high correlation with the Lagergren pseudo second-order model and revealed a rapid desorption reaction. Batch equilibrium data over 3 adsorption/desorption cycles showed that the coconut coir and media mixture were the most resilient, demonstrating they could be used through 3 or more adsorption/desorption cycles. FE-SEM imaging, XRD, and EDS analyses supported the batch adsorption and desorption results showing significant surface sorption of CuO species in the media mixture and coconut coir, followed by partial desorption using 0.1 M HCl as a desorbing agent.

Publication Date

7-1-2016

Publication Title

Chemosphere

Volume

154

Number of Pages

444-453

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1016/j.chemosphere.2016.03.130

Socpus ID

84962856799 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/84962856799

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