Speciation and bioavailability of selenium and antimony in non-flooded and wetland soils: A review

Nakamaru, Yasuo; Altansuvd, Javkhlantuya

doi:10.1016/j.chemosphere.2014.04.024

Cited by 135 publications

(57 citation statements)

References 75 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%

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%

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

2017

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“…A lot of research, in recent years, has been carried out on the uptake and metabolism of Se by plants , where the metabolic fate of Se taken up by different plants has been reviewed by different researchers (e.g., Sors et al 2005b ;Pilon-Smits and Quinn 2010 ;Nakamaru and Altansuvd 2014 ;Pilon-Smits et al 2014 ;Malagoli et al 2015 ;Pilon-Smits 2015 ). Where, the trigger for much of this work was the recognition, not only by scientists, but also by administrators, politicians, and, not least, the general public, especially in the USA, of the importance of Se as an environmental contaminant (Reilly 2006 ).…”

Section: Plant Selenium Metabolismmentioning

confidence: 99%

Selenium and its Role in Higher Plants

El-Ramady¹,

Abdalla²,

Alshaal³

et al. 2015

Pollutants in Buildings, Water and Living Organisms

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“…The behaviour of selenium in the environment is influenced by several factors such as pH, chemical form, soil mineral composition, redox conditions, as well as micro-organisms (Nakamaru and Altansuvd, 2014;Sarret et al, 2005;Nelson et al, 1996;Oremland et al, 2004;de Souza et al, 1999). In the environment selenium occurs with different oxidation states forming selenide (Se 2À ), elemental Se (Se 0 ), selenite (SeO 3 2À ), selenate (SeO 4 2À ), and organic Se (Kausch et al, 2012;Pezzarossa et al, 1999).…”

Section: Introductionmentioning

confidence: 99%

“…In the environment selenium occurs with different oxidation states forming selenide (Se 2À ), elemental Se (Se 0 ), selenite (SeO 3 2À ), selenate (SeO 4 2À ), and organic Se (Kausch et al, 2012;Pezzarossa et al, 1999). At high redox potential selenate dominates and at intermediate redox conditions selenite becomes more prevailing (Nakamaru and Altansuvd, 2014;Pezzarossa et al, 1999). Se 2À and Se 0 are found typically in most reducing environments with low pH (Nakamaru and Altansuvd, 2014;Pezzarossa et al, 1999).…”

Section: Introductionmentioning

confidence: 99%

“…At high redox potential selenate dominates and at intermediate redox conditions selenite becomes more prevailing (Nakamaru and Altansuvd, 2014;Pezzarossa et al, 1999). Se 2À and Se 0 are found typically in most reducing environments with low pH (Nakamaru and Altansuvd, 2014;Pezzarossa et al, 1999). Under non-flooded conditions (mineral soils) the solubility of selenium is affected by adsorption on oxy-hydroxides of aluminium (Al), iron (Fe) and manganese (Mn), but in wetland environments, such as acidic bogs, reduced selenium (Se 0 ) and organic matter bound Se (Se-org) are the most important forms (Nakamaru and Altansuvd, 2014).…”

Section: Introductionmentioning

confidence: 99%

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