Toxic effects of selenite and need to bio removal of it

Razieh Arjmand,1,* Maryam arjmand,2

Abstract


Introduction

Selenium is an important micronutrient for human and animal health, however it is toxic slightly above homeostatic requirement. the oxidation forms of selenium such as selenite and selenat classified as a mutagen agents that induce cancer in humans. 40% of the selenium toxicity caused by human activity including coal mining, environmental contamination from agricultural drain water, sewage sludge, vulcanization of rubber and oil products. this oxyanion, was demonstrated to cause selenosis, bronchitis, cellular dys- function in a number of tissues, including hepatocytes, lens, erythrocytes, and skeletal muscle.

Methods

This review article has been prepared with electronic search in the scientific databases of scholar, springer, medline, pubmed, science direct, and using the key words of selenium, selenite, biomedical, environmental hazards, books and articles from 1980 to 2016. selection of articles were based on relevance with the aim of this paper.

Results

Exposure to selenite is primarily through food, and in some areas with seleniferous soils, through drinking water, so defective removal of selenite from water resources affects human health. exposure to selenite is primarily through food, and in some areas with seleniferous soils, through drinking water, so defective removal of selenite from water resources affects human health.

Conclusion

The most commonly methods for selenite removal are physicaly methods, chemical purification and biological removal. in recent decade, bio-remediation technique has attracted a lot of attention, due to lower cost and higher efficiency than other methods.

Keywords

Selenium, selenite, toxicity, bio-remediation