Optimization of Removal of 2-methylisoborneol from Drinking Water using UV/H2O2

Abstract 2-methylisoborneol (2-MIB) is a common odor-causing compound in drinking water with a low odor threshold (10 ng/L). Since conventional treatment processes cannot effectively remove it, this study investigated an advanced oxidation technology: UV/H2O2 decomposing the compound in laboratory and pilot trials. The results show that, in the laboratory trials, the removal efficiency of 2-MIB increased with the concentration of H2O2 increasing; 764 ng/L of 2-MIB was reduced to 2 ng/L after 8 min reaction with 3.92 mg/L of H2O2; 702 ng/L of 2-MIB was reduced to 42 ng/L after 8 min reaction with 1.93 mg/L of H2O2; the degradation of 2-MIB conformed to first-order kinetics. The data obtained from the pilot trials was analyzed with software Design- Expert, determining the optimal operation conditions (the H2O2 dosage of 6 mg/L, the UV dose of 350 mJ/cm2, and the 2-MIB dose of 275 ng/L) with the highest 2-MIB removal percentage of 96.58%. The reaction rate between UV/H2O2 and 2-MIB was accessed through this software by fitting experimental data.