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Competitive Sorption of Metal Ions on Titanium Phosphate Sorbent(TiP1) in Fixed-Bed Columns: A Closed-Mine Waters Study
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Chemical Engineering.ORCID iD: 0000-0002-4533-3920
Aeronautics, Department of Flight Data and Navigation, SAAB, Linköping, Sweden.
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Geosciences and Environmental Engineering.
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Chemical Engineering.
2019 (English)In: ACS Sustainable Chemistry & Engineering, ISSN 2168-0485, Vol. 7, no 9, p. 8145-8154Article in journal (Refereed) Published
Abstract [en]

Sorptionfixed-bed column experiments were performed using atitanium phosphate ion-exchanger composed of−H2PO4units [TiO(OH)(H2PO4)·H2O]. Model mine water containingfive divalent metal ions (Cu2+,Zn2+,Mn2+,Ni2+,and Co2+) and a few closed-mine water samples were treated to evaluate the sorptionpreference of the material. For thefirst time, dynamic ion-exchange capacities(estimated to be between 3.2 and 4.2 mequiv g−1) and static ion-exchange uptakes(calculated to be between 3.1 and 3.5 mequiv g−1) were obtained for the same TiP1sorbent and data were discussed in terms of sorption behavior. It was found thatsorption processes on TiP1 in model and closed-mine waters during a columnexperiment could be accurately predicted from the corresponding batch experiment(including the sorbent’s capacities in different types of waters). A competitivesorption phenomenon in favor of Cu2+on TiP1 was established for all cases, pointingtoward the possibility of isolating pure copper concentrate from closed-mine waters.The relatively high amounts of calcium and magnesium ions present in mine waters did not appear to considerably affect theselectivity of TiP1 material. Exploratory experiments for sorbent regeneration and desorption using a low concentration of nitricacid were demonstrated.

Place, publisher, year, edition, pages
2019. Vol. 7, no 9, p. 8145-8154
Keywords [en]
Titanium phosphate, Water treatment, Heavy metals, Column, Sorption
National Category
Other Environmental Engineering Physical Chemistry
Research subject
Waste Science and Technology; Chemistry of Interfaces
Identifiers
URN: urn:nbn:se:ltu:diva-74044DOI: 10.1021/acssuschemeng.8b05971ISI: 000467351200017Scopus ID: 2-s2.0-85065065701OAI: oai:DiVA.org:ltu-74044DiVA, id: diva2:1318204
Note

Validerad;2019;Nivå 2;2019-05-27 (oliekm)

Available from: 2019-05-27 Created: 2019-05-27 Last updated: 2019-08-19Bibliographically approved

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Trublet, MyleneCarabante, IvanRusanova-Naydenova, Daniela

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