title: Bactericidal and ammonia removal activity of silver ion-exchanged zeolite.
abstract: The antimicrobial activity of silver-zeolite against Escherichia coli, Vibrio harveyi, Vibrio cholerae and Vibrio parahaemolyticus was examined in liquid medium and agar well diffusion assays. The minimum inhibitory concentration for silver ion-exchanged zeolite against E. coli and V. harveyi was 40 μg/ml, and 50-60 μg/ml for V. cholerae and V. parahaemolyticus. The diameter of the inhibition zones for E. coli, V. harveyi, V. cholerae and V. parahaemolyticus, respectively, increased from 0.5 to 2.3 cm, 0.6 to 2.4 cm, 0.3 to 1.65 cm and 0.3 to 1.7 cm with increasing concentrations of silver ion-exchanged zeolite from 10 to 400 μg. Silver-zeolite removed 20-37% ammonia from aqueous solutions. This study suggests that silver ion-exchanged zeolite could impact disease and environmental management in shrimp aquaculture.
authors.affiliation: Department of Chemical and Environmental Engineering, University of California, Riverside, CA, USA.
authors.forename: K K
authors.initials: KK
authors.lastname: Krishnani
authors.forename: Yu
authors.initials: Y
authors.lastname: Zhang
authors.forename: Laj
authors.initials: L
authors.lastname: Xiong
authors.forename: Yushan
authors.initials: Y
authors.lastname: Yan
authors.forename: Raj
authors.initials: R
authors.lastname: Boopathy
authors.forename: Ashok
authors.initials: A
authors.lastname: Mulchandani
mesh_terms: D000641:Ammonia / Q000302:isolation & purification*; D000900:Anti-Bacterial Agents / Q000494:pharmacology*; D015169:Colony Count, Microbial; D004926:Escherichia coli / Q000187:drug effects / Q000254:growth & development; D007474:Ion Exchange; D008826:Microbial Sensitivity Tests; D012834:Silver / Q000494:pharmacology*; D013052:Spectrometry, X-Ray Emission; D014733:Vibrio / Q000187:drug effects / Q000254:growth & development; D017641:Zeolites / Q000494:pharmacology*
chemical_list: D000900:Anti-Bacterial Agents; D017641:Zeolites; D012834:Silver; D000641:Ammonia