Removal of Enrofloxacin in aqueous solution using UVH2O2 system in contacting system

Name: Kornkanok Jutarvutikul

LCSH: Kasetsart University -- Theses. M.S. (Environmental Technology and Management) 2020

Classification :.LCCS: SH174

LCSH: Kasetsart University. -- Department of Environmental Technology and Management -- Theses

LCSH: Antibiotics in aquaculture

LCSH: Antibiotics in veterinary medicine

LCSH: Antibiotics

LCSH: Fishes -- Effect of water pollution on

Abstract: Three of the most commonly used veterinary antibiotics-enrofloxacin (ENR), sulfamethoxazole (SMX), and oxytetracycline (OTC) - were chosen as representative antibiotics for UV/H2O2 treatments. The objective was to determine the optimization of UV/H2O2 to remove antibiotics from aquaculture discharge water using response surface methodology. The degradation of the antibiotics was investigated under varying UV/H2O2 conditions in environments with different levels of pH, water matrices, humic acid, and constituent ions. The degradation results demonstrated that increasing the H2O2 dosage facilitated ENR degradation at a neutral pH while facilitating degradation of SMX and OTC at a slightly acidic pH. The optimum removal conditions for ENR, which was used in all influential effect experiments and the contact tank experiments, was obtained at 10 mM H2O2, a pretreated COD of 87.51 mg L-1 , and an initial pH of 6.15. Among the tested anions, only the presence of Clshowed slight positive effects on ENR degradation, due to the generation of secondary active radicals. During the reaction, the hydroxyl radical (•OH) was present at a higher pH while singlet oxygen (1O2) was slightly present at a lower pH. The experimental results from H2O2 sequential addition indicated that freshly added H2O2 could quench the recently generated •OH and therefore a high H2O2 concentration with frequent adding was not necessary. Our contact system reduced the ENR concentration in both the effluent reservoir and in the UV irradiation zone. The overall results supported the use of the UV/H2O2 system to treat remnant antibiotics in the discharge water.

Kasetsart University. Office of the University Library

Address: Bangkok

Email: tdckulib@ku.ac.th

Name: Chanat Chokejaroenrat

Role: Thesis Advisor

Name: Chainarong Sakulthaew

Role: Thesis CO-Advisor

Created: 2020

Modified: 2025-07-17

Issued: 2025-07-17

วิทยานิพนธ์/Thesis

application/pdf

URL: https://www.lib.ku.ac.th/KUthesis/2563/kornkanok-jut-all.pdf

CallNumber: SH174 .K67

eng

DegreeName: Master of Science

Level: Master's Degree

Descipline: Environmental Technology and Management

Grantor: Kasetsart University

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