水中硒的来源及处理
Source
Selenium (Se) is essential for human nutrition, with the majority coming from
food. The concentration found in drinking water is usually low, and comes from
natural minerals. Selenium is also a by-product of copper mining / smelting. It
is used in photoelectric devises because it’s electrical conductivity varies
with light. Naturally occurring selenium compounds have not been shown to be
carcinogenic in animals. However, acute toxicity caused by high selenium intake
has been observed in laboratory animals and in animals grazing in areas where
high selenium levels exist in the soil. The US EPA has established the MCL for
selenium at 0.05 mg/l.
Treatment
Anion exchange can reduce the amount of selenium in drinking water by 60 - 95%.
Reverse osmosis is excellent at reduction of selenium.
