University of Oulu

Ruichi Zhang, Tiina Leiviskä, Juha Tanskanen, Baoyu Gao, Qinyan Yue, Utilization of ferric groundwater treatment residuals for inorganic-organic hybrid biosorbent preparation and its use for vanadium removal, Chemical Engineering Journal, Volume 361, 2019, Pages 680-689, ISSN 1385-8947, https://doi.org/10.1016/j.cej.2018.12.122

Utilization of ferric groundwater treatment residuals for inorganic-organic hybrid biosorbent preparation and its use for vanadium removal

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Author: Zhang, Ruichi1; Leiviskä, Tiina1; Tanskanen, Juha1;
Organizations: 1Chemical Process Engineering, P.O. Box 4300, FIN-90014 University of Oulu, Oulu, Finland
2Shandong Provincial Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Qingdao 266237, China
Format: article
Version: accepted version
Access: embargoed
Persistent link: http://urn.fi/urn:nbn:fi-fe2019061220208
Language: English
Published: Elsevier, 2019
Publish Date: 2020-12-21
Description:

Abstract

Ferric groundwater treatment residual (Fe-GWTR) collected from a Finnish groundwater treatment plant were recovered for use after acid dissolution as an iron source for an inorganic-organic hybrid material. Acid dissolution, performed with 1 mol/L hydrochloric acid and mixing for one hour at room temperature, was determined as the optimal condition based on a high Fe concentration and low concentration of interfering elements. Peat modification was conducted at pH values of 3, 5 and 7 with both a commercial iron reagent (FeCl3·6H2O) and Fe-GWTR solution for comparison. A modification pH of 3 resulted in the highest vanadium removal efficiency for both iron sources. The isoelectric point (pHIEP) of Fe-GWTR-modified peat at pH 3 (Fe-GWTR-P3) was found to be 5.0. After modification, it was confirmed that BET surface area and pore volume of the peat were enlarged. Maximum capacity was found to be around 16 mg/g with a 24-hour contact time at pH 4 and a good fit was achieved with the Redlich-Peterson isotherm model. The kinetic data followed the Elovich equation, which refers to the chemisorption mechanism. According to intra-particle diffusion and Boyd models, the adsorption was a two-step diffusion process, with intra-particle diffusion being the slowest step. This study demonstrates that Fe-GWTR could safely be used as an iron source for biomass modification, and Fe-GWTR-P3 could be used as a low-cost and effective sorbent for vanadium-containing wastewater treatment.

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Series: Chemical engineering journal
ISSN: 1385-8947
ISSN-E: 1873-3212
ISSN-L: 1385-8947
Volume: 361
Pages: 680 - 689
DOI: 10.1016/j.cej.2018.12.122
OADOI: https://oadoi.org/10.1016/j.cej.2018.12.122
Type of Publication: A1 Journal article – refereed
Field of Science: 116 Chemical sciences
218 Environmental engineering
Subjects:
Funding: The research has been conducted as part of the VanProd project “Innovation for Enhanced Production of Vanadium from Waste Streams in the Nordic Region,” funded by the European Union program Interreg Nord 2014–2020 and the Regional Council of Lapland.
Copyright information: © 2018. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/.
  https://creativecommons.org/licenses/by-nc-nd/4.0/