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Influence of Zn(II) on the adsorption of arsenate onto ferrihydrite
Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Industriell miljö- och processteknik.ORCID-id: 0000-0003-4292-6752
Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Industriell miljö- och processteknik.ORCID-id: 0000-0002-4755-5754
Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Industriell miljö- och processteknik.ORCID-id: 0000-0001-9794-8305
Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Geovetenskap och miljöteknik.ORCID-id: 0000-0002-1442-1573
Vise andre og tillknytning
2012 (engelsk)Inngår i: Environmental Science and Technology, ISSN 0013-936X, E-ISSN 1520-5851, Vol. 46, nr 24, s. 13152-13159Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Addition of iron oxide to arsenic-contaminated soil has been proposed as a means of reducing the mobility of arsenic in the soil. Arsenic and zinc are common coexisting contaminants in soils. The presence of zinc therefore may affect the adsorption properties of arsenic on iron oxide, and may thus affect its mobility in the soil. The influence of Zn(II) on the adsorption of arsenate ions on iron oxide was studied. Batch adsorption experiments indicated that Zn(II) increased the arsenate removal from a solution by ferrihydrite at pH 8. However, ATR-FTIR spectroscopy showed that no adsorption of arsenate on a ferrihydrite film occurred at pD 8 in the presence of Zn(II). Precipitation of zinc hydroxide carbonate followed by arsenate adorption onto the precipitate was found to be a plausible mechanism explaining the arsenate removal from a solution in the presence of Zn(II) at pH/pD 8. The previously suggested mechanisms attributing the enhanced removal of arsenate from solution in the presence of Zn(II) to additional adsorption on iron oxides could not be verified under the experimental conditions studied. It was also shown that at pH/pD 4, the presence of Zn(II) in the system did not significantly affect the adsorption of arsenate on ferrihydrite.

sted, utgiver, år, opplag, sider
2012. Vol. 46, nr 24, s. 13152-13159
HSV kategori
Forskningsprogram
Kemisk teknologi; Avfallsteknik
Identifikatorer
URN: urn:nbn:se:ltu:diva-7306DOI: 10.1021/es300729mISI: 000312432200017PubMedID: 23170764Scopus ID: 2-s2.0-84871287800Lokal ID: 5a705c12-7010-4a2f-828d-027812630829OAI: oai:DiVA.org:ltu-7306DiVA, id: diva2:980195
Forskningsfinansiär
Knut and Alice Wallenberg FoundationThe Kempe Foundations
Merknad

Validerad; 2012; 20121210 (andbra)

Tilgjengelig fra: 2016-09-29 Laget: 2016-09-29 Sist oppdatert: 2023-09-05bibliografisk kontrollert

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Carabante, IvanGrahn, MattiasHolmgren, AllanKumpiene, JurateHedlund, Jonas

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