Genesis of seleniferous soils and associated animal and human health problems

Dhillon, K. S.; Dhillon, S. K.; Bijay‐Singh,

doi:10.1016/bs.agron.2018.11.001

Cited by 21 publications

(15 citation statements)

References 197 publications

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“…In addition to anthropogenic Se contamination problems, soils that are naturally high in Se content (seleniferous soils) are found in several places worldwide such as Punjab, India [217][218][219], Pine Ridge, Fort Collins, Colorado, USA [220], Western Colorado, USA [221], Enshi in China [222,223], Saskatchewan in Canada, Queensland in Australia, Irapuato in Mexico, the State of Boyaca in Colombia, and the Deog-Pyoung area in Korea [224]. Therefore, to address both anthropogenic and natural Se problems in soil, there is an urgent need to study Se-biofortification and phytoremediation through hyper-accumulating plants, which have the ability to uptake huge amounts of Se from soils and transfer it into the atmosphere by volatilization [67].…”

Section: Are Selenium and Nano-selenium Emerging Pollutants?mentioning

confidence: 99%

Selenium and Nano-Selenium Biofortification for Human Health: Opportunities and Challenges

et al. 2020

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Selenium is an essential micronutrient required for the health of humans and lower plants, but its importance for higher plants is still being investigated. The biological functions of Se related to human health revolve around its presence in 25 known selenoproteins (e.g., selenocysteine or the 21st amino acid). Humans may receive their required Se through plant uptake of soil Se, foods enriched in Se, or Se dietary supplements. Selenium nanoparticles (Se-NPs) have been applied to biofortified foods and feeds. Due to low toxicity and high efficiency, Se-NPs are used in applications such as cancer therapy and nano-medicines. Selenium and nano-selenium may be able to support and enhance the productivity of cultivated plants and animals under stressful conditions because they are antimicrobial and anti-carcinogenic agents, with antioxidant capacity and immune-modulatory efficacy. Thus, nano-selenium could be inserted in the feeds of fish and livestock to improvise stress resilience and productivity. This review offers new insights in Se and Se-NPs biofortification for edible plants and farm animals under stressful environments. Further, extensive research on Se-NPs is required to identify possible adverse effects on humans and their cytotoxicity.

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Section: Are Selenium and Nano-selenium Emerging Pollutants?mentioning

confidence: 99%

Selenium and Nano-Selenium Biofortification for Human Health: Opportunities and Challenges

et al. 2020

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“…Although the anthropogenic As source resulting from waste disposal and mining activities is increasingly becoming important, the recent catastrophic episode of large-scale groundwater As-contamination in many countries, including Bangladesh, India, China and Mexico is a result of geological origin, mobilized from sedimentary rocks in the Himalayas over a long period [21,22], and the situation is likely to be aggravated by climate change [23]. Similarly, weathering of Se-rich rocks, such as black shales, carbonaceous limestones, carbonaceous cherts, mudstones and seleniferous coal is a major source of Se input in seleniferous soil [24]. Most of the PTEs found in the soil are known to show high affinity with soil clay and organic matter [25].…”

Section: Role Of Soils In the Disposition Of Contaminantsmentioning

confidence: 99%

The role of soils in the disposition, sequestration and decontamination of environmental contaminants

Sarkar

Mukhopadhyay

Ramanayaka

et al. 2021

Phil. Trans. R. Soc. B

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Soil serves as both a ‘source’ and ‘sink’ for contaminants. As a source, contaminants are derived from both ‘geogenic’ and ‘anthropogenic’ origins. Typically, while some of the inorganic contaminants including potentially toxic elements are derived from geogenic origin (e.g. arsenic and selenium) through weathering of parent materials, the majority of organic (e.g. pesticides and microplastics) as well as inorganic (e.g. lead, cadmium) contaminants are derived from anthropogenic origin. As a sink, soil plays a critical role in the transformation of these contaminants and their subsequent transfer to environmental compartments, including groundwater (e.g. pesticides), surface water (phosphate and nitrate), ocean (e.g. microplastics) and atmosphere (e.g. nitrous oxide emission). A complex transformation process of contaminants in soil involving adsorption, precipitation, redox reactions and biodegradation control the mobility, bioavailability and environmental toxicity of these contaminants. Soil also plays a major role in the decontamination of contaminants, and the ‘cleaning’ action of soil is controlled primarily by the physico-chemical interactions of contaminants with various soil components, and the biochemical transformations facilitated by soil microorganisms. In this article, we examine the geogenic and anthropogenic sources of contaminants reaching the soil, and discuss the role of soil in the sequestration and decontamination of contaminants in relation to various physico-chemical and microbial transformation reactions of contaminants with various soil components. Finally, we propose future actions that would help to maintain the role of soils in protecting the environment from contaminants and delivering sustainable development goals. This article is part of the theme issue ‘The role of soils in delivering Nature's Contributions to People’.

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“…In humans, selenosis takes place as a result of overconsumption of nutritional supplements containing excess selenium or accidental overdose of a pharmaceutical product [17]. The outbreaks of human selenium toxicity occur in populations eating crops growing on selenium accumulative soils [18,19]. People consumed high levels of selenium in food supplies showed clinical manifestations and symptoms of toxicity including loss of hair and nail, decay of the teeth and disturbances of the central nervous system (CNS) [19,20].…”

Section: Introductionmentioning

confidence: 99%

The protective effects of vitamin E against selenium-induced oxidative damage and hepatotoxicity in rats

Alahmadi

El-Alfy

Hemaid

et al. 2020

Journal of Taibah University for Science

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Selenium is a trace element which can be toxic when consumed at high levels. The study was conducted to assess the possible protective role of vitamin E against selenosis in rats. Selenium was applied at different single doses (4.5, 9 and 18 mg/kg b.wt.). Vitamin E (200 mg/kg b.wt.) was given to the rats one hour before treatment with the higher selenium dose. In seleniumtreated rats, selenosis was evident from the elevated level of malondialdehyde. Oxidative stress was induced from the significant altered activity levels of CAT, SOD and GPx. Furthermore, selenium-induced hepatotoxicity was developed, where the activity levels of AST, ALT and GGT were significantly increased. Hepatotoxicity was also manifested histologically. Pretreatment with vitamin E significantly alleviated the affected levels of the investigated parameters, and counteracted the hepatic histopathological changes. The results demonstrate that vitamin E supplementation provides an effective protection against oxidative damage and hepatotoxicity induced by selenosis.

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Genesis of seleniferous soils and associated animal and human health problems

Cited by 21 publications

References 197 publications

Selenium and Nano-Selenium Biofortification for Human Health: Opportunities and Challenges

Selenium and Nano-Selenium Biofortification for Human Health: Opportunities and Challenges

The role of soils in the disposition, sequestration and decontamination of environmental contaminants

The protective effects of vitamin E against selenium-induced oxidative damage and hepatotoxicity in rats

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