Biogeochemistry of selenium. A review

Sharma, Virender K.; McDonald, Thomas J.; Sohn, Mary; Anquandah, George A.K.; Pettine, M.; Zbořil, Radek

doi:10.1007/s10311-014-0487-x

Cited by 142 publications

(73 citation statements)

References 80 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As well known, weathering of rocks is the major source of environmental Se and in general, limestone and sandstone contain lower concentrations of Se (<0.1 mg kg −1 ), whereas, as reviewed by Wu ( 2004 ), shale tend to contain higher Se concentrations (0.6 mg kg −1 ). The biogeochemistry of Se is characterized by several reviews (e.g., Hartikainen 2005 ;Di Gregorio 2008 ;Fordyce 2013 ;El-Ramady et al 2014 ;Sharma et al 2015 ;Nancharaiah and Lens 2015 ;El-Ramady et al 2015a ;Gojkovic et al 2015 ;Winkel et al 2015 ). These biogeochemical processes have many distinct features including (1) the substitution of Se for S decreases if the oxygen fugacity increases; (2) the stable SeO 4 2− are rapidly oxidized in surface conditions; (3) the adsorption of SeO 4 2− on soil minerals is nearly quantitative (Wang and Gao 2001 ).…”

Section: Biogeochemistry Of Seleniummentioning

confidence: 98%

Selenium and its Role in Higher Plants

El-Ramady¹,

Abdalla²,

Alshaal³

et al. 2015

Pollutants in Buildings, Water and Living Organisms

View full text Add to dashboard Cite

Section: Biogeochemistry Of Seleniummentioning

confidence: 98%

Selenium and its Role in Higher Plants

El-Ramady¹,

Abdalla²,

Alshaal³

et al. 2015

Pollutants in Buildings, Water and Living Organisms

View full text Add to dashboard Cite

“…Selenium is a potentially toxic element, and mining-related selenium release was a major concern during the last decade as high concentrations were reported at some mine sites [2,3]. Selenium contamination is vast, affecting both aquatic and terrestrial ecosystems, and has therefore attracted the attention of natural resource and water quality regulators around the world [4,5]. Due to the high mobility of selenium in oxidizing geochemical environments, the behavior of selenium is also important in safety analyses of radioactive waste repositories [6,7].…”

Section: Introductionmentioning

confidence: 99%

The Thermodynamics of Selenium Minerals in Near-Surface Environments

2017

View full text Add to dashboard Cite

Selenium compounds are relatively rare as minerals; there are presently only 118 known mineral species. This work is intended to codify and systematize the data of mineral systems and the thermodynamics of selenium minerals, which are unstable (selenides) or formed in near-surface environments (selenites), where the behavior of selenium is controlled by variations of the redox potential and the acidity of solutions at low temperatures and pressures. These parameters determine the migration of selenium and its precipitation as various solid phases. All selenium minerals are divided into four groups-native selenium, oxide, selenides, and oxysalts-anhydrous selenites (I) and hydrous selenites and selenates (II). Within each of the groups, minerals are codified according to the minimum number of independent elements necessary to define the composition of the mineral system. Eh-pH diagrams were calculated and plotted using the Geochemist's Workbench (GMB 9.0) software package. The Eh-pH diagrams of the Me-Se-H 2 O systems (where Me = Co, Ni, Fe, Cu, Pb, Zn, Cd, Hg, Ag, Bi, As, Sb, Al and Ca) were plotted for the average contents of these elements in acidic waters in the oxidation zones of sulfide deposits. The possibility of the formation of Zn, Cd, Ag and Hg selenites under natural oxidation conditions in near surface environments is discussed.

show abstract

“…As we move down along the y-axis to a more reducing environment, the selenate is reduced to selenite (SeO3 2− ) for alkaline pH and to hydrogen selenite for acidic and neutral pH. Finally, in reducing conditions it exists in the −2 oxidation state as selenide (Se 2− ) [3]. The occurrence of selenium in different oxidation states is also affected by the type of surrounding elements and ions.…”

Section: Chemistry Environmental Fate and Effects Of Seleniummentioning

confidence: 99%

Mining-Related Selenium Contamination in Alaska, and the State of Current Knowledge

et al. 2017

View full text Add to dashboard Cite

Selenium pollution has been a topic of extensive research dating back further than the last decade and has attracted significant attention from several environmental and regulatory agencies in order to monitor and control its discharge from myriad industrial sources. The mining industry is a prime contributor of hazardous selenium release in the aquatic systems and is responsible for both acute and chronic impacts on living organisms. Herein we provide an overview of selenium contamination issues, with a specific focus on selenium release from mining industries, including a discussion of various technologies commonly employed to treat selenium-impacted waters from mining discharge. Different cases pertaining to selenium release from Alaskan mines (during years [2000][2001][2002][2003][2004][2005][2006][2007][2008][2009][2010][2011][2012][2013][2014][2015] are also presented, along with measures taken to mitigate high concentration releases. For continued resource exploration and economic development activities, as well as environmental preservation, it is important to fundamentally understand such emerging and pressing issues as selenium contamination and investigate efficient technological approaches to counter these challenges.

show abstract

Biogeochemistry of selenium. A review

Cited by 142 publications

References 80 publications

Selenium and its Role in Higher Plants

Selenium and its Role in Higher Plants

The Thermodynamics of Selenium Minerals in Near-Surface Environments

Mining-Related Selenium Contamination in Alaska, and the State of Current Knowledge

Contact Info

Product

Resources

About