Journal: The Science of the total environment
Article Title: Effectiveness of zinc oxide-assisted photocatalysis for concerned constituents in reclaimed wastewater: 1,4-Dioxane, trihalomethanes, antibiotics, antibiotic resistant bacteria (ARB), and antibiotic resistance genes (ARGs)
doi: 10.1016/j.scitotenv.2018.08.360
Figure Lengend Snippet: Photocatalysis of THMs, chloroform and 1,4-dioxane by C-ZnO. The experiments were conducted using 3 mg/L of THMs (or 3 mg/L of chloroform or 20 mg/L of 1,4-dioxane) and 1 g/L of C-ZnO at pH 7.0 with UV exposure (4 W, 365 nm) for 24 h. ZnO-free controls (i.e., chemical + UV) were used. (a) THMs and chloroform (i–ii) dechlorination and debromination was based on the theoretical amount of chloride or bromide ions that can be released from the amount of THMs photocatalyzed. One mol of THMs degradation = 6 mol of chloride (or bromine) released. For complete dechlorination of 3 mg/L THMs, 4.65 mg/L of free chloride and 6.8 mg/L of free bromide are expected to release into liquid medium. Overall dehalogenation efficiency is about 85%. (iii) Dechlorination of 1 mol of chloroform will release 3 mol of free chloride (i.e. 0.67 mg/L of free chloride release per 3 mg/L of chloroform degraded). (b) Removal of 1,4-dioxane. Each error bar is already shown in the figures.
Article Snippet: Trihalomethane mixture (THMs) including bromodichloromethane, bromoform, chloroform, and dibromochloromethane (200 μg/mL each), was purchased from Fisher Scientific (Pittsburgh, PA).
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