RT journal article
T1 Inactivation of a wild isolated Klebsiella pneumoniae by photo-chemical processes: UV-C, UV-C/H2O2 and UV-C/H2O2/Fe3+
A1 Aguilar, Silvio
A1 Rosado, Daniel
A1 Moreno Andrés, Javier
A1 Cartuche, Luis
A1 Cruz, Darío
A1 Acevedo Merino, Asunción
A1 Nebot Sanz, Enrique
A2 Tecnologías del Medio Ambiente
K1 Aquaculture
K1 Iron
K1 Antibiotic resistance bacteria
K1 Fenton process
K1 Advanced oxidation processes
K1 Hydrogen peroxide
AB Shrimp (Litopenaeus vannamei) farming is an important economic activity in several countries. Pathogens inshrimp farms and its e uents pose a potential hazard for both humans and shrimps. Wild strains of bacteria werecharacterized in a shrimp farm, and Klebsiella pneumoniae was chosen as a good indicator due to its presence inthe pond and the e uent and its resistance to antibiotics. Di erent photochemical processes (UV/H2O2, UV/H2O2/Fe3+) were tested for inactivation of wild isolated K. pneumoniae and compared to UV-C radiation. Bykinetic modelling, a kmax equal to 0.43 s−1 was obtained for UV-C treatment. After optimizing the cited pro-cesses, ranging [H2O2]: 10–30 mg·l−1; an optimal [H2O2] of 10 mg·l−1 was found, increasing kmax on 13.63%compared to UV-C. This optimal concentration was tested for UV/H2O2/Fe3+ process; ranging [Fe3+]: 2–20mg·l−1. The highest yield was obtained by a [H2O2]:[Fe3+] = 10:2, which leads to 4-Log reduction in 12.88 s oftreatment. Moreover, resistance of K. pneumoniae was compared to Escherichia coli. The latter proved to be moresensitive despite its similar cellular structure. Results suggested that the photochemical processes could enhancedisinfection e ciency, especially for photo-assisted Fenton-like process in most resistant bacteria.
PB Elsevier
SN 1873-4308
YR 2017
FD 2017-10-31
LK http://hdl.handle.net/10498/37790
UL http://hdl.handle.net/10498/37790
LA eng
DS Repositorio Institucional de la Universidad de Cádiz
RD 22-sep-2026