UV–Vis LED-assisted photo-Fenton process for mineralization of losartan and hydrochlorothiazide: optimization using desirability function
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH(2021)
摘要
This study presents the results obtained for the optimization of the mineralization of losartan (LOS) and hydrochlorothiazide (HCTZ) using the photo-Fenton process with a UV–Vis LED. Experimental design optimization employing a Doehlert matrix and a global desirability function enabled simultaneous evaluation of multiple responses, with factor fitting providing the best conditions that maximized the mineralization efficiency: Fe 2+ at 10 mg L −1 and H 2 O 2 at 100 mg L −1 . High rates of mineralization of LOS and HCTZ were obtained, with dissolved organic carbon (DOC); removal of almost 75% after 90 min was observed for both pharmaceuticals. The kinetic model showed that the mineralization followed two regimes in the first minutes, with a fast progression followed by slower activity. The energy consumption calculated for mineralization of LOS and HCTZ at a concentration of 20 mg L −1 using the UV–Vis LED-assisted photo-Fenton process, at 60 min, was 130 kWh m −3 . The desirability function provides a useful tool for finding optimal experimental conditions for the treatment of effluents with different characteristics. The UV–Vis LED was shown to be a good light source in the photo-Fenton process.
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关键词
Photo-Fenton, UV-Vis LED, Pharmaceuticals, Antihypertensives, Doehlert, Desirability function, Mineralization
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