Distribution and speciation of ambient selenium in contrasted soils, from mineral to organic rich

Tolu, Julie; Thiry, Yves; Bueno, Maı̈té; Jolivet, Claudy; Potin‐Gautier, Martine; Hécho, Isabelle Le

doi:10.1016/j.scitotenv.2014.01.079

Cited by 122 publications

(53 citation statements)

References 40 publications

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“…In terms of Se oxidation states as a function of Eh, Elrashidi et al (1987) about Se forms as related to change pH and Eh as well as varying organic matter and Fe/Al oxyhydroxide contents can be found elsewhere (Nakamaru and Altansuvd, 2014;Tolu et al, 2014).…”

Section: Selenium In Environment: Focus On Its Behavior In Soilsmentioning

confidence: 99%

“…On the other hand, Se sorption properties in soils are influenced by several factors such as pH, soil mineralogy and texture, organic matter content, Se chemical form, redox condition, and interactions with other ions (Fordyce, 2007). In general, volcanic soils can have high Se concentrations, but sometimes with low bioavailability (Floor e Román-Ross, 2012; Tolu et al, 2014). For example, some regions in the world have volcanic soils with high Se contents (Andolosols), presenting a historic of diseases related to the Se deficiency in humans due to the low bioavailability of this element in soil (Rayman, 2000;Floor et al, 2009).…”

Section: Selenium Abundance In Rocks and Soilsmentioning

confidence: 99%

“…Soil organic matter has an important role in the Se dynamic in the soil-plantatmosphere system. Associations between organic matter fraction and mineral phase (especially oxyhydroxides), resulting in organo-mineral associations, may affect the properties of the soil in terms of Se adsorption capacity (Floor and Román-Ross, 2012;Tolu et al, 2014). Most part of inorganic Se can be interacting with soil organic matter, which may be (or not) bioavailable in function of the sort of established interactions, especially those with humic substances.…”

Section: Selenium Abundance In Rocks and Soilsmentioning

confidence: 99%

“…It seems that the Se bioavailability in soil is higher when this element is associated with fulvic acids than with humic acids (Qin et al, 2012). In addition to interactions between inorganic-Se and humic substances, plants and microbial processes may also immobilize inorganic Se (Tolu et al, 2014).…”

Section: Selenium Abundance In Rocks and Soilsmentioning

confidence: 99%

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Selenium behavior in the soil environment and its implication for human health

2017

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Selenium (Se) is an important element that was discovered in 1817, and since the 1960s, it has been regarded as an essential micronutrient for both animals and humans, playing among other functions a relevant role in the antioxidant system of mammals. Inadequate blood Se levels in the human body is a well-known concern in many parts of the world. This malnutrition problem is often due to Se-poor diet, probably as a result of the low Se availability in soils where crops are growing. Nowadays, it is known that not only the total content, but also the inorganic and organic forms of Se contained in foods are important for human nutrition. However, paradoxically some regions of the world present high Se levels in soils causing several functional disorders and diseases in people who live in seleniferous areas. As essential micronutrient, Se should be supplied in controlled amounts to avoid harmful effects. Therefore, taking into account the importance of the soils as a way to ensure the adequate Se supply for the population, this review has dealt with Se behavior in soil environment (e.g., Se forms and adsorption and desorption reactions) and its relevance for the human health. As a final message, the further understanding of Se behavior in soils to predict its availability for crops in different systems will be a significant approach in future studies to establish forms and safe doses of Se to be added in fertilizers. Agronomic and genetic biofortification of staple crops with Se has been suggested as an important tool to improve Se intake by population in Se-poor sites.Index terms: Essential micronutrient; Se adsorption; Se availability; biofortification; human nutrition. RESUMOO selênio (Se) é um elemento importante que foi descoberto em 1817 e reconhecido como elemento essencial para os humanos e animais desde os anos 60. Esse elemento apresenta, dentre outras funções, papel relevante no sistema antioxidante dos mamíferos. Níveis inadequados de Se no corpo humano tem sido uma preocupação bem conhecida em muitas regiões do mundo. Esse problema de desnutrição com Se ocorre frequentemente devido a dietas pobres nesse elemento, o que provavelmente tem relação com a baixa disponibilidade de Se nos solos onde as culturas agrícolas estão sendo cultivadas. Atualmente, sabe-se que, além da quantidade de Se contida nos alimentos, sua forma (e.g., inorgânica ou orgânica) é importante para a nutrição humana. Apesar da deficiência de Se ser um problema em alguns locais, algumas regiões do mundo apresentam níveis altos de Se nos solos, causando várias desordens e doenças nas pessoas que moram nestas áreas consideradas seleníferas. Sendo um elemento essencial, o Se deve ser suprido em quantidades adequadas para evitar efeitos prejudiciais. Assim, levando-se em consideração a importância dos solos como um meio para garantir o suprimento adequado de Se para a população, esta revisão tem abordado o comportamento do Se no ambiente do solo (e.g., formas de Se e reações de adsorção e dessorção) e sua relevância para a saúde hu...

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Section: Selenium In Environment: Focus On Its Behavior In Soilsmentioning

confidence: 99%

Section: Selenium Abundance In Rocks and Soilsmentioning

confidence: 99%

Section: Selenium Abundance In Rocks and Soilsmentioning

confidence: 99%

Section: Selenium Abundance In Rocks and Soilsmentioning

confidence: 99%

See 2 more Smart Citations

Selenium behavior in the soil environment and its implication for human health

2017

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show abstract

“…In addition to these inorganic Se species, different organic Se species are present in soils, but factors that influence organic Se speciation have not been identified. Soluble organic Se, such as selenomethionine (C 5 H 11 NO 2 Se), methane seleninic acids (CH 3 SeOOH) and trimethyl selenium ion (Abrams and Burau, 1989;Yamada and Hattori, 1989;Abrams et al, 1990a;Tolu et al, 2011;Stroud et al, 2012;Tolu et al, 2014), and solid organic Se associated with humic and fulvic acid fractions of soil organic matter (Kang et al, 1991b;Qin et al, 2012) that is possibly present as seleno-amino acids incorporated into protein or peptides (Kang et al, 1991b), have been detected in soils. Volatile organic Se compounds, such as dimethylselenide ((CH 3 ) 2 Se) and dimethyldiselenide ((CH 3 ) 2 Se 2 ), are also formed in soils via soil microbial processes (Abu-Erreish et al, 1968;Doran and Alexander, 1977a).…”

Section: Selenium Speciation In Soilsmentioning

confidence: 99%