Characterization of copper adsorption onto an alginate encapsulated magnetic sorbent by a combined FT-IR, XPS, and mathematical modeling study

Soh Fong Lim, Yu Ming Zheng, Shuai Wen Zou, J. Paul Chen

Research output: Contribution to journalArticlepeer-review

240 Scopus citations

Abstract

Copper adsorption onto calcium alginate encapsulated magnetic sorbent is studied in this paper. The objective of this study was to qualitatively and quantitatively elucidate the copper binding onto the sorbent. The adsorption increases from around 0 to almost 100% as the initial pH is increased from 2 to 5. A maximum adsorption capacity of 0.99 mmol g-1 is achieved. The FT-IR and XPS studies show that the C-O in carboxyl group of alginate directly attaches to the copper ion that leads to most of the adsorption. A mathematical model is developed, and it includes ion exchange between the calcium and the copper, coordination reaction between the functional group and the copper, as well as surface complex formation between the iron oxide and the copper. The model is capable of describing and predicting effects of various key operational parameters on the adsorption process, such as initial pH, metal concentration, and dosage of sorbent.

Original languageEnglish
Pages (from-to)2551-2556
Number of pages6
JournalEnvironmental Science & Technology
Volume42
Issue number7
DOIs
StatePublished - 1 Apr 2008

Fingerprint Dive into the research topics of 'Characterization of copper adsorption onto an alginate encapsulated magnetic sorbent by a combined FT-IR, XPS, and mathematical modeling study'. Together they form a unique fingerprint.

Cite this