Abstract：
:Selenium (Se) is an important micronutrient and essential trace element for both humans and animals, which exist in the environment ubiquitously. Selenium deficiency is an important issue worldwide, with various reported cases of its deficiency. Low selenium contents in some specific terrestrial environments have resulted in its deficiency in humans. However, high levels of selenium in the geochemical environment may have harmful influences and can cause a severe toxicity to living things. Due to its extremely narrow deficiency and toxicity limits, selenium is becoming a serious matter of discussion for the scientists who deals with selenium-related environmental and health issues. Based on available relevant literature, this review provides a comprehensive data about Se sources, levels, production and factors affecting selenium bioavailability/speciation in soil, characteristics of Se, biogeochemical cycling, deficiency and toxicity, and its environmental transformation to know the Se distribution in the environment. Further research should focus on thoroughly understanding the concentration, speciation, Se cycling in the environment and food chain to effectively utilize Se resources, remediate Se deficiency/toxicity, and evaluate the Se states and eco-effects on human health.
journal_name
Environ Geochem Healthjournal_title
Environmental geochemistry and healthauthors
Ullah H,Liu G,Yousaf B,Ali MU,Irshad S,Abbas Q,Ahmad Rdoi
10.1007/s10653-018-0195-8subject
Has Abstractpub_date
2019-04-01 00:00:00pages
1003-1035issue
2eissn
0269-4042issn
1573-2983pii
10.1007/s10653-018-0195-8journal_volume
41pub_type
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