LAPSE:2020.0362
Published Article
LAPSE:2020.0362
Wastewater Treatment from Lead and Strontium by Potassium Polytitanates: Kinetic Analysis and Adsorption Mechanism
April 14, 2020
The reduction of heavy and radioactive metal pollution of industrial wastewater remains a vital challenge. Due to layered structure and developed surface, potassium polytitanate had potential in becoming an effective sorbent for metal extraction from wastewater in the presented paper. On the basis of the different sorption models, this paper studied the mechanism of Pb2+ and Sr2+ cation extraction from aqueous solution by non-crystalline potassium polytitanate produced by molten salt synthesis. The ion exchange during metal extraction from model solutions was proven by kinetic analysis of ion concentration change, electronic microscopy, and X-ray fluorescence analysis of sorbent before and after sorption, as well as by theoretical modeling of potassium, lead, and strontium polytitanates. The sorption was limited by the inner diffusion in the potassium polytitanate (PPT) interlayer space, as was shown using the Boyd diffusion model. The sorption processes can be described by Ho and McKay’s pseudo-second-order model compared to the Lagergren pseudo-first-order model according to kinetic analysis. It was found that the ultimate sorption capacity of synthesized sorbent reached about 714.3 and 344.8 (ions mg/sorbent grams) for Pb2+ and Sr2+ ions, respectively, which was up to four times higher than sorption capacity of the well-known analogues. Therefore, the presented study showed that potassium polytitanate can be considered as a promising product for industry-scaled wastewater purification in practice.
Record ID
Keywords
heavy metals, ion exchange, potassium titanate, radioactive metals, sorption
Subject
Suggested Citation
Ermolenko A, Shevelev A, Vikulova M, Blagova T, Altukhov S, Gorokhovsky A, Godymchuk A, Burmistrov I, Offor PO. Wastewater Treatment from Lead and Strontium by Potassium Polytitanates: Kinetic Analysis and Adsorption Mechanism. (2020). LAPSE:2020.0362
Author Affiliations
Ermolenko A: Department of Chemistry and Technology of Materials, Yuri Gagarin State Technical University of Saratov, 77 Polytecnicheskaya Street, 410054 Saratov, Russia
Shevelev A: Department of Chemistry and Technology of Materials, Yuri Gagarin State Technical University of Saratov, 77 Polytecnicheskaya Street, 410054 Saratov, Russia
Vikulova M: Department of Chemistry and Technology of Materials, Yuri Gagarin State Technical University of Saratov, 77 Polytecnicheskaya Street, 410054 Saratov, Russia [ORCID]
Blagova T: Department of Chemistry and Technology of Materials, Yuri Gagarin State Technical University of Saratov, 77 Polytecnicheskaya Street, 410054 Saratov, Russia
Altukhov S: Department of Chemistry and Technology of Materials, Yuri Gagarin State Technical University of Saratov, 77 Polytecnicheskaya Street, 410054 Saratov, Russia
Gorokhovsky A: Department of Chemistry and Technology of Materials, Yuri Gagarin State Technical University of Saratov, 77 Polytecnicheskaya Street, 410054 Saratov, Russia [ORCID]
Godymchuk A: Department of Materials Science, National Research Tomsk Polytechnic University, 30 Lenina Avenue, 634050 Tomsk, Russia; Tobolsk Complex Scientific Station, Ural Branch of the Russian Academy of Science, 15 Osipov Academician Street, 626152 Tobolsk, Russi [ORCID]
Burmistrov I: Department of Chemistry and Technology of Materials, Yuri Gagarin State Technical University of Saratov, 77 Polytecnicheskaya Street, 410054 Saratov, Russia; Department of Functional Nanosystems and High-Temperature Materials, National University of Scien [ORCID]
Offor PO: Metallurgical and Materials Engineering Department, University of Nigeria, Nsukka 410001, Nigeria
Shevelev A: Department of Chemistry and Technology of Materials, Yuri Gagarin State Technical University of Saratov, 77 Polytecnicheskaya Street, 410054 Saratov, Russia
Vikulova M: Department of Chemistry and Technology of Materials, Yuri Gagarin State Technical University of Saratov, 77 Polytecnicheskaya Street, 410054 Saratov, Russia [ORCID]
Blagova T: Department of Chemistry and Technology of Materials, Yuri Gagarin State Technical University of Saratov, 77 Polytecnicheskaya Street, 410054 Saratov, Russia
Altukhov S: Department of Chemistry and Technology of Materials, Yuri Gagarin State Technical University of Saratov, 77 Polytecnicheskaya Street, 410054 Saratov, Russia
Gorokhovsky A: Department of Chemistry and Technology of Materials, Yuri Gagarin State Technical University of Saratov, 77 Polytecnicheskaya Street, 410054 Saratov, Russia [ORCID]
Godymchuk A: Department of Materials Science, National Research Tomsk Polytechnic University, 30 Lenina Avenue, 634050 Tomsk, Russia; Tobolsk Complex Scientific Station, Ural Branch of the Russian Academy of Science, 15 Osipov Academician Street, 626152 Tobolsk, Russi [ORCID]
Burmistrov I: Department of Chemistry and Technology of Materials, Yuri Gagarin State Technical University of Saratov, 77 Polytecnicheskaya Street, 410054 Saratov, Russia; Department of Functional Nanosystems and High-Temperature Materials, National University of Scien [ORCID]
Offor PO: Metallurgical and Materials Engineering Department, University of Nigeria, Nsukka 410001, Nigeria
Journal Name
Processes
Volume
8
Issue
2
Article Number
E217
Year
2020
Publication Date
2020-02-12
Published Version
ISSN
2227-9717
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PII: pr8020217, Publication Type: Journal Article
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LAPSE:2020.0362
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doi:10.3390/pr8020217
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[v1] (Original Submission)
Apr 14, 2020
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Apr 14, 2020
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https://psecommunity.org/LAPSE:2020.0362
Original Submitter
Calvin Tsay
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