Effect of neutralizing agents on the type of As co-precipitates formed by in situ Fe oxides synthesis and its impact on the bioaccessibility of As in soil

The Science of the Total Environment
Jinhee ParkKyoungphile Nam

Abstract

The bioaccessibility of heavy metals in soil is closely related to their potential risk. Therefore, developing techniques for reducing it needs considerable attention. In this study, we aimed to co-precipitate soil As(V) through an in situ formation of Fe oxides, thereby reducing its bioaccessibility. Soil As(V) was co-precipitated by introducing 2% Fe-nitrate (w/w) and 30% water (v/w) into soil at pH ~7. Two different neutralizing agents (NaOH and CaO) were used to induce the precipitation of Fe oxides, and their effects on the speciation of As were investigated. In all the stabilized soils, the exchangeable As fraction decreased, and the fraction of As bound to amorphous Fe oxides increased by a factor of more than 1.4. In contrast, a marked decrease in bioaccessibility of As was achieved using NaOH (40% to 7%). X-ray absorption spectroscopy analysis demonstrated that highly bioaccessible forms of calcium iron arsenate (yukonite and arseniosiderite) could be generated in CaO-stabilized soil. Our study found that neutralizing agents may play an important role in stabilizing As(V) and lowering its bioaccessibility through determining the type of formed Fe oxides in soil.

References

May 1, 2004·Environmental Science & Technology·William R RichmondGordon M Parkinson
Jun 22, 2005·Journal of Synchrotron Radiation·B Ravel, M Newville
Dec 31, 2005·Environmental Science & Technology·Georges Ona-NguemaGordon E Brown
Sep 19, 2006·Journal of Hazardous Materials·Javier GiménezLara Duro
Apr 15, 2008·The Science of the Total Environment·B CancèsG Calas
Oct 31, 2008·Talanta·B DausR Wennrich
Aug 12, 2009·Environment International·Petr Drahota, Michal Filippi
Jun 29, 2013·Environmental Science & Technology·James Farrell, Binod K Chaudhary
Apr 4, 2014·BioMed Research International·K T LimH Wasoh
May 12, 2015·Journal of Nanoscience and Nanotechnology·Jong-Hee KimYong-Il Kim
Apr 10, 2016·Journal of Hazardous Materials·Cameron J OllsonAlbert L Juhasz
Sep 1, 2016·Nanotechnology, Science and Applications·Attarad AliAltaf Hussain
Jul 6, 2017·Frontiers in Plant Science·Surabhi AwasthiRudra D Tripathi
Jan 5, 2018·Environmental Science & Technology·Katrin EhlertRuben Kretzschmar
Jan 6, 2018·International Journal of Environmental Research and Public Health·Ghulam AbbasUNKNOWN Natasha
Mar 10, 2018·Environmental Geochemistry and Health·Myoung-Soo KoKyoung-Woong Kim
Nov 26, 2018·The Science of the Total Environment·Hanna FrickKristian K Brandt

❮ Previous
Next ❯

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.