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How to use ferric chloride to clean water

I am a design student working on a project designing a water filtration system for third world countries. My grandma, who is a chemist, said that instead of expensive filters I could possible use ferric chloride ⇦ this on eBay or Amazon [affil links] ? how would I do this and would this work to make the water drinkable. The water has bacteria, arsenic, and fluoride in it.

Gita Vaysburg
SJSU ID - San Jose, California, USA
2006

Designing water filtration is one thing, designing purification is something else. You need to have knowledge of chemistry, biology and some engineering. I would say you have a bit of research to do. No one can give you a quick answer and besides it's your project.

Gene Packman
process supplier - Great Neck, New York
2006