title: Bacterial attachment and detachment in aluminum-coated quartz sand in response to ionic strength change.
abstract: Column experiments were performed to investigate the effect of ionic strength on the attachment and detachment of Staphylococcus aureus ATCC 10537 and Bacillus subtilis ATCC 6633 in aluminum-coated quartz sand. Results showed that the average mass recovery decreased from 80.7 to 45.3% in quartz sand and remained constant in aluminum-coated sand with increasing ionic concentrations of sodium chloride solution from 1 to 100 mmol/L. As the ionic concentrations of leaching solution changed from 100 to 0.1 mmol/L, average mass recovery of 39.1% was obtained from quartz sand (bacterial release), but no detachment was observed from aluminum-coated sand. This lack of detachment can be attributed to inner-sphere complexes between bacteria and aluminum-coated sand, which are minimally affected by ionic strength. This research indicates that aluminum-coated sand has advantages over quartz sand in bacteria removal in water filtration systems.
authors.affiliation: Environmental Biocolloid Engineering Laboratory, Department of Rural Systems Engineering, Seoul National University, Seoul, Korea. songbkin@snu.ac.kr
authors.forename: Chang-Gu
authors.initials: CG
authors.lastname: Lee
authors.forename: Seong-Jik
authors.initials: SJ
authors.lastname: Park
authors.forename: Yong-Un
authors.initials: YU
authors.lastname: Han
authors.forename: Jeong-Ann
authors.initials: JA
authors.lastname: Park
authors.forename: Song-Bae
authors.initials: SB
authors.lastname: Kim
mesh_terms: D000535:Aluminum / Q000737:chemistry*; D001422:Bacterial Adhesion / Q000502:physiology*; D009994:Osmolar Concentration; D011791:Quartz / Q000737:chemistry*; D012822:Silicon Dioxide / Q000737:chemistry*; D013211:Staphylococcus aureus / Q000502:physiology*; D013499:Surface Properties; D014871:Water Microbiology; D018508:Water Purification
chemical_list: D011791:Quartz; D012822:Silicon Dioxide; D000535:Aluminum