title: Arsenic removal by iron oxide coated sponge: treatment and waste management.
abstract: One of the problems in drinking water that raises concern over the world is that millions of people still have to use arsenic-contaminated water. There is a worldwide need to develop appropriate technologies to remove arsenic from water for household and community water supply systems. In this study, a new material namely iron oxide coated sponge (IOCSp) was developed and used to remove arsenic (As) from contaminated groundwater in Vietnam. The results indicated that IOCSp has a high capacity in removing both As (V) and As (III). The adsorption capacity of IOCSp was up to 4.6 mg As/g IOCSp, showing better than many other materials. It was observed from a pilot study that a small quantity of IOCSp (180 g) could reduce As concentration of 480 microg/L in 1.5 m3 of contaminated natural water to below 40 microg/L. In addition, an exhausted IOCSp, containing a large amount of arsenic (up to 0.42 wt %) could safely be disposed through the solidification/stabilization with cement. Addition of fly ash also reduced the amount of arsenic in the leachate.
authors.affiliation: Faculty of Engineering, University of Technology, Sydney (UTS), PO Box 123, Broadway, Sydney NSW 2007, Australia.
authors.forename: Tien Vinh
authors.initials: TV
authors.lastname: Nguyen
authors.forename: Abdur
authors.initials: A
authors.lastname: Rahman
authors.forename: Saravanamuthu
authors.initials: S
authors.lastname: Vigneswaran
authors.forename: Huu Hao
authors.initials: HH
authors.lastname: Ngo
authors.forename: Jaya
authors.initials: J
authors.lastname: Kandasamy
authors.forename: Duc Tho
authors.initials: DT
authors.lastname: Nguyen
authors.forename: Tuan Anh
authors.initials: TA
authors.lastname: Do
authors.forename: Trung Kien
authors.initials: TK
authors.lastname: Nguyen
mesh_terms: D000327:Adsorption; D001151:Arsenic / Q000737:chemistry* / Q000302:isolation & purification*; D005290:Ferric Compounds / Q000737:chemistry*; D011140:Polyurethanes / Q000737:chemistry*; D014867:Water / Q000737:chemistry; D014874:Water Pollutants, Chemical / Q000737:chemistry* / Q000302:isolation & purification*; D018508:Water Purification / Q000379:methods*
chemical_list: D005290:Ferric Compounds; D011140:Polyurethanes; D014874:Water Pollutants, Chemical; D014867:Water; C000499:ferric oxide; D001151:Arsenic