Selenates are chemical compounds that contain selenium in the form of the selenate ion, SeO4^2-. They are typically found in various minerals and can also be produced through industrial processes. Selenates are soluble in water and can be used in fertilizers, as selenium is an essential nutrient for some organisms. In the environment, selenates can be found in soil and water, where they may affect plant growth and animal health. While selenium is necessary in small amounts, excessive exposure to selenates can be toxic, leading to health issues in both humans and wildlife.