title: Removal of bromide from surface waters using silver impregnated activated carbon.
abstract: The main objectives of this study were to develop an understanding of silver impregnated activated carbon (SIAC) preparation for enhanced bromide (Br-) removal from water, and to investigate the impact of aqueous background composition on the Br-removal. Several SIACs were produced using various combinations of oxidation and silver impregnation procedures and powdered activated carbons (ACs). Regardless of the preparation procedure, SIACs showed significantly Br-uptakes than the virgin ACs. The Br-removal efficiency was affected by (i) the background water composition (e.g. Cl-and NOM competition reduced the Br-uptake), (ii) silver impregnation process (e.g. silver content, pre-oxidation of virgin AC; silver impregnation largely increased the Br-removal, and the pre-oxidation of AC prior to silver impregnation was found to be important), and (iii) AC characteristics (e.g. surface area, oxygen content; SIACs with higher silver contents and larger surface areas exhibited higher degrees of Br-removal). The Br-removal by SIAC reduced the formation of brominated THMs. Jar test results showed that coagulation did not have an impact on Br-removal by SIAC.
authors.affiliation: Department of Environmental Engineering and Earth Sciences, Clemson University, 342 Computer Court, Anderson, SC 29625, United States.
authors.forename: Chen
authors.initials: C
authors.lastname: Chen
authors.affiliation: Department of Environmental Engineering and Earth Sciences, Clemson University, 342 Computer Court, Anderson, SC 29625, United States.
authors.forename: Onur Guven
authors.initials: OG
authors.lastname: Apul
authors.affiliation: Department of Environmental Engineering and Earth Sciences, Clemson University, 342 Computer Court, Anderson, SC 29625, United States. Electronic address: tkaranf@clemson.edu.
authors.forename: Tanju
authors.initials: T
authors.lastname: Karanfil
mesh_terms: D000327:Adsorption; D001965:Bromides; D002244:Carbon; D002606:Charcoal; D012834:Silver; D014874:Water Pollutants, Chemical; D018508:Water Purification
chemical_list: D001965:Bromides; D014874:Water Pollutants, Chemical; D002606:Charcoal; D012834:Silver; D002244:Carbon
keywords: Adsorption; Bromide; Disinfection byproduct; Natural organic matter; Silver impregnated activated carbon