We would like to know about the existence of any Naturally available Nano minerals substance having negative ions. Which can be use for elimination of air-born particle. please suggest any reference source or any study don on this subject matter.
Dear Sir
I think the links below will benefit you in your search
https://www.hindawi.com/journals/jspec/2015/472019/
https://www.google.com/patents/US20120121883
https://inspiredliving.com/surround-air-ionizers/benefits-negative-ions.htm
http://www.aaqr.org/article/download?articleId=1030&path=/files/article/1030/28_AAQR-11-11-OA-0214_1007-1015.pdf
Best Regards
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