Abstract
This study aimed to synthesize a new magnetic photocatalytic nanosystem composed of Ag-CuFe2O4@WO3 and to investigate its photodegradation efficiency for two drug pollutants of Gemfibrozil (GEM) and Tamoxifen (TAM) under Ultraviolet (UV) light irradiation. In this regard, the effect of pH, catalyst dosage, and drug concentration was thoroughly determined. The largest photodegradation level for GEM (81%) and TAM (83%) was achieved at pH 5, a photocatalyst dosage of 0.2 g/L, drug concentration of 5 mg/L, and contact time of 150 min. The drug photodegradation process followed the pseudo first-order kinetic model. In addition to the photodegradation effect, the nanocomposites were proved to be efficient in terms of antibacterial activity, proportional to the Ag doping level. The Ag-CuFe2O4@WO3 nanocomposite exhibited a stable, efficient performance without an obvious catalytic loss after five successive cycles. Taken together, the developed magnetic photocatalyst is able to simultaneously disinfect wastewater streams and to degrade pharmaceutical contaminants and thus shows a promising potential for purification of multi-contaminant water systems.
Highlights
The pharmacological active compounds (PhACs) are an important, emerging group of organic contaminants that are persistent and show toxicity
Gemfibrozil (5-(2,5-Dimethylphenoxy)-2,2-dimethylpentanoic acid (GEM)), a fibrous hypolipidemic agent that is effective in reducing the incidence of coronary heart disease, and Tamoxifen 2-[4-[(Z)-1,2-diphenylbut-1-enyl]phenoxy]-N,N-dimethyl ethanamine (TAM), a nonsteroidal anti-estrogen drug that is widely used in the treatment and prevention of breast cancer, are frequently found in the wastewater streams [6]
No notable peak shift implies that the components are merely physically connected and no significant hydrogen bonding or chelation has not taken place
Summary
The pharmacological active compounds (PhACs) are an important, emerging group of organic contaminants that are persistent and show toxicity They produce active metabolites when released into aquatic environments [1,2]. Numerous studies have been conducted on the formation and fate of PhACs’ active metabolites and their toxic effects According to such investigations, these compounds are partially destroyed during conventional wastewater/water treatment processes and are non-biodegradable [4]. These compounds are partially destroyed during conventional wastewater/water treatment processes and are non-biodegradable [4] These compounds are present in the aqueous environment in trace quantities such as ng/L and mg/L, their chronic toxicity is challenging due to the steady exposure of human kind to these compounds. Gemfibrozil (5-(2,5-Dimethylphenoxy)-2,2-dimethylpentanoic acid (GEM)), a fibrous hypolipidemic agent that is effective in reducing the incidence of coronary heart disease, and Tamoxifen 2-[4-[(Z)-1,2-diphenylbut-1-enyl]phenoxy]-N,N-dimethyl ethanamine (TAM), a nonsteroidal anti-estrogen drug that is widely used in the treatment and prevention of breast cancer, are frequently found in the wastewater streams [6]
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