Author Comment Last activity Moderation
zengirl2 "For a project I was looking at toxins in water and read about sunflower stalks being used for this purpose. There was even a startup in NJ, but not..." | Read more » over 4 years ago
gretchengehrke "Hmm. This is surprising to me too. Iron-rich clay can readily adsorb arsenic under oxygen-rich conditions (this is actually the root of Bangladesh,..." | Read more » over 4 years ago
stevie "interesting! I've seen people using clay to filter water in Nicaragua, but I don't have an understanding of how that worked. " | Read more » over 4 years ago
Ag8n "I'm very surprised. I've spent many hours analyzing incoming raw material ( often times clays) usually for heavy metals. Clays are often the sour..." | Read more » over 4 years ago