Retention and multiphase transformation of selenium oxyanions during the formation of magnetite via iron(ii) hydroxide and green rust

Dalton Transactions : an International Journal of Inorganic Chemistry
Nicolas BörsigT Neumann

Abstract

Environmental and health hazards associated with the trace element selenium are mainly related to the presence of the highly mobile selenium oxyanions selenite and selenate (oxidation states IV and VI). In this study, we investigated the immobilization of dissolved selenite and selenate during the formation of magnetite in coprecipitation experiments based on the progressive oxidation of an alkaline, anoxic Fe2+ system (pH 9.2). Up to initial selenium concentrations of 10-3 mol L-1 (mass/volume ratio = 3.4 g L-1), distribution coefficient values (log Kd) of 3.7 to 5.1 L kg-1 demonstrate high retention of selenium oxyanions during the mineral formation process. This immobilization is due to the reduction of selenite or selenate, resulting in the precipitation of sparingly soluble selenium compounds. By X-ray diffraction analysis, these selenium compounds were identified as trigonal elemental selenium that formed in all coprecipitation products following magnetite formation. Time-resolved analysis of selenium speciation during magnetite formation and detailed spectroscopic analyses of the solid phases showed that selenium reduction occurred under anoxic conditions during the early phase of the coprecipitation process via interact...Continue Reading

References

May 12, 2005·Environmental Pollution·C BruggemanP Vandemussele
May 12, 2006·Journal of Synchrotron Radiation·T Ressler
May 29, 2007·Journal of Hazardous Materials·Miquel RoviraL Duro
Apr 16, 2008·Environmental Science & Technology·Andreas C Scheinost, Laurent Charlet
May 29, 2008·Environmental Science & Technology·Raquel López de Arroyabe LoyoMonique Simonoff
Sep 27, 2008·The Science of the Total Environment·Markus Lenz, Piet N L Lens
Oct 25, 2008·Journal of Colloid and Interface Science·Norbert JordanJean-Jacques Ehrhardt
Nov 4, 2008·Journal of Contaminant Hydrology·Andreas C ScheinostLaurent Charlet
Nov 15, 2008·Journal of Contaminant Hydrology·Bernd Grambow
Dec 9, 2008·Chemosphere·Yu-Wei ChenNelson Belzile
Jan 23, 2010·Environmental Science & Technology·Sudipta ChakrabortyLaurent Charlet
Jul 16, 2010·Applied Radiation and Isotopes : Including Data, Instrumentation and Methods for Use in Agriculture, Industry and Medicine·Gerhard JörgChristoph Lierse V Gostomski
Oct 1, 2010·Langmuir : the ACS Journal of Surfaces and Colloids·Robert L Rebodos, Peter J Vikesland
Aug 4, 2011·Environmental Science & Technology·Yuheng WangGordon E Brown
Jan 29, 2013·Journal of Hazardous Materials·Mingliang KangLaurent Charlet
Aug 1, 2013·Water Research·Liping LiangXiangzi Zhang
Jun 3, 2015·Nutrients·Lenny H E WinkelGary S Bañuelos
Mar 29, 2018·Environmental Science & Technology·Paul Clarence M FranciscoTsuyoshi Yaita

❮ Previous
Next ❯

Citations

May 1, 2021·International Journal of Molecular Sciences·Alla I PerfilevaKonstantin V Krutovsky

❮ Previous
Next ❯

Methods Mentioned

BETA
X-ray

Software Mentioned

FEFF
Iterative Transformation Factor Analysis ( ITFA
SixPack
ITFA
WinXAS

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.