Field trial of a patented fluoride removal method, based on precipitation–adsorption, has been carried out in some villages of Assam, North East India, with groundwater sources containing 1.8–20 mg/l initial [F– ] at small community (220 l) and household (15 l) levels.
Original Source [3]
Links:
[1] http://admin.indiaenvironmentportal.org.in/feature-article/field-experience-fluoride-nilogon-method-fluoride-removal-groundwater
[2] http://www.indiaenvironmentportal.org.in/files/file/fluoride-removal.pdf
[3] https://www.currentscience.ac.in/Volumes/118/02/0255.pdf
[4] http://admin.indiaenvironmentportal.org.in/category/author/rajkamal-mohan
[5] http://admin.indiaenvironmentportal.org.in/category/author/sweety-gogoi
[6] http://admin.indiaenvironmentportal.org.in/category/author/anup-j-bora-et-al
[7] http://admin.indiaenvironmentportal.org.in/category/journal/current-science
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/fluoride
[9] http://admin.indiaenvironmentportal.org.in/category/thesaurus/groundwater
[10] http://admin.indiaenvironmentportal.org.in/category/thesaurus/karbi-anglong
[11] http://admin.indiaenvironmentportal.org.in/category/thesaurus/assam
[12] http://admin.indiaenvironmentportal.org.in/category/thesaurus/north-east
[13] http://admin.indiaenvironmentportal.org.in/category/thesaurus/groundwater-quality