Review of coagulation technology for removal of arsenic: case of Chile.
Coagulation technology has been used since 1970 in northern Chile for removing arsenic from drinking-water. This experience suggests that coagulation is an effective technology for the removal of arsenic. It is currently possible to reduce arsenic from 400 microg/L to 10 microg/L at a rate of 500 L/sec, assuming pH, oxidizing and coagulation agents are strictly controlled. The Chilean experience with the removal of arsenic demonstrates that the water matrix dictates the selection of the arsenic-removal process. This paper presents a summary of the process, concepts, and operational considerations for the use of coagulation technology for removal of arsenic in Chile.
Sancha
Ana María
AM
Department of Civil Engineering, Division of Water Resources and Environment, University of Chile, Blanco Encalada 2002, Santiago, Chile. amsancha@ing.uchile.cl
D001151:Arsenic / Q000737:chemistry*; D020261:Arsenic Poisoning / Q000517:prevention & control*; D002677:Chile; D004781:Environmental Exposure; D005618:Fresh Water / Q000737:chemistry*; D006801:Humans; D007501:Iron / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000032:analysis*; D018508:Water Purification / Q000379:methods*; D014881:Water Supply
D014874:Water Pollutants, Chemical; D007501:Iron; D001151:Arsenic