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Treatment of metal (loid) contaminated solutions using iron-peat as sorbent: is landfilling a suitable management option for the spent sorbent?
Lulea Univ Technol, Dept Civil Environm & Nat Resources Engn, SE-97187 Lulea, Sweden..ORCID iD: 0000-0001-5375-8825
Lulea Univ Technol, Dept Civil Environm & Nat Resources Engn, SE-97187 Lulea, Sweden..
KTH, School of Architecture and the Built Environment (ABE), Sustainable development, Environmental science and Engineering. Royal Inst Technol, Dept Sustainable Dev Environm Sci & Engn, Tekn Ringen 76, SE-10044 Stockholm, Sweden..ORCID iD: 0000-0003-4350-9950
Lulea Univ Technol, Dept Civil Environm & Nat Resources Engn, SE-97187 Lulea, Sweden..
2019 (English)In: Environmental science and pollution research international, ISSN 0944-1344, E-ISSN 1614-7499, Vol. 26, no 21, p. 21425-21436Article in journal (Refereed) Published
Abstract [en]

This study firstly aimed to investigate the potential of simultaneous metal (loid) removal from metal (oid) solution through adsorption on iron-peat, where the sorbent was made from peat and Fe by-products. Up-flow columns filled with the prepared sorbent were used to treat water contaminated with As, Cu, Cr, and Zn. Peat effectively adsorbed Cr, Cu, and Zn, whereas approximately 50% of inlet As was detected in the eluent. Iron-sand was effective only for adsorbing As, but Cr, Cu, and Zn were poorly adsorbed. Only iron-peat showed the simultaneous removal of all tested metal (loid)s. Metal (loid) leaching from the spent sorbent at reducing conditions as means to assess the behaviour of the spent sorbent if landfilled was also evaluated. For this purpose, a standardised batch leaching test and leaching experiment at reducing conditions were conducted using the spent sorbent. It was found that oxidising conditions, which prevailed during the standardised batch leaching test, could have led to an underestimation of redox-sensitive As leaching. Substantially higher amounts of As were leached out from the spent sorbents at reducing atmosphere compared with oxidising one. Furthermore, reducing environment caused As(V) to be reduced into the more-toxic As (III).

Place, publisher, year, edition, pages
SPRINGER HEIDELBERG , 2019. Vol. 26, no 21, p. 21425-21436
Keywords [en]
Arsenic, Metals, Trace elements, Sorption, Landfill leachate, Low redox
National Category
Environmental Management
Identifiers
URN: urn:nbn:se:kth:diva-257825DOI: 10.1007/s11356-019-05379-5ISI: 000482211100030PubMedID: 31119550Scopus ID: 2-s2.0-85066893937OAI: oai:DiVA.org:kth-257825DiVA, id: diva2:1348965
Note

QC 20190906

Available from: 2019-09-06 Created: 2019-09-06 Last updated: 2019-09-06Bibliographically approved

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Bhattacharya, Prosun

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