title: Interactions between rotavirus and natural organic matter isolates with different physicochemical characteristics.
abstract: Interaction forces between rotavirus and Suwanee River natural organic matter (SRNOM) or Colorado River NOM (CRNOM) were studied by atomic force microscopy (AFM) in NaCl solutions and at unadjusted pH (5.7-5.9). Compared to CRNOM, SRNOM has more aromatic carbon and phenolic/carboxylic functional groups. CRNOM is characterized with aliphatic structure and considerable presence of polysaccharide moieties rich in hydroxyl functional groups. Strong repulsive forces were observed between rotavirus and silica or mica or SRNOM. The interaction decay length derived from the approaching curves for these systems involving rotavirus in high ionic strength solution was significantly higher than the theoretical Debye length. While no adhesion was observed for rotavirus and SRNOM, attraction was observed between CRNOM and rotavirus during approach and adhesion during retraction. Moreover, these adhesion forces decreased with increasing ionic strength. Interactions due to ionic hydrogen bonding between deprotonated carboxyl groups on rotavirus and hydroxyl functional groups on CRNOM were suggested as the dominant interaction mechanisms between rotavirus and CRNOM.
authors.affiliation: Department of Civil and Environmental Engineering, Safe Global Water Institute, University of Illinois at Urbana-Champaign , Urbana, Illinois 61801, United States.
authors.forename: Leonardo
authors.initials: L
authors.lastname: Gutierrez
authors.forename: Thanh H
authors.initials: TH
authors.lastname: Nguyen
mesh_terms: D002627:Chemistry, Physical; D006860:Hydrogen Bonding; D006863:Hydrogen-Ion Concentration; D018625:Microscopy, Atomic Force; D009930:Organic Chemicals / Q000737:chemistry*; D012401:Rotavirus / Q000737:chemistry*; D012965:Sodium Chloride / Q000737:chemistry
chemical_list: D009930:Organic Chemicals; D012965:Sodium Chloride