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LoginWhile elemental selenium and selenides generally have a low bioavailability, the inorganic selenium compounds selenite and selenite are toxic. In the field of ecotoxicology, selenium is a particularly interesting element since there is a relatively fine line between essential and toxic selenium concentrations. Read more here.
Arsenic occurs in organic and inorganic forms. Organic arsenic, the predominant form present in seafood, is not particularly harmful. Inorganic arsenic however is toxic and long-term exposure may cause skin lesions or cancer. Read more here.
Methylmercury is highly toxic and is formed from inorganic mercury through the process of methylation. This occurs for example in the sea as well as in lakes and rivers, soils and sediments. Methylmercury is biomagnified in aquatic food chains meaning the concentration increases for each step in the food chain. Read more here.
The element tin (Sn) is not considered particularly harmful, but some organotin compounds are toxic and is a threat to humans, plants and animals. Organotin compounds have been used as biocides in boat paint, wood impregnation and as preservatives and pesticides. Read more here.
