BiOCl facilitated photocatalytic degradation of atenolol from water: Reaction kinetics, pathways and products. (April 2019)

• Record Type: Journal Article
• Authors: Hu, Jinyuan; Jing, Xueping; Zhai, Li; Guo, Jing; Lu, Kun; Mao, Liang
• Is Part Of: Chemosphere. Volume 220(2019)
• Page Start: 77
• Page End: 85
• Publication Date: 2019-04
• Subjects: Atenolol -- BiOCl -- Photocatalysis -- LC/MS -- NOM; Pollution -- Periodicals; Pollution -- Physiological effect -- Periodicals; Environmental sciences -- Periodicals; Atmospheric chemistry -- Periodicals; 551.511
• DOI: 10.1016/j.chemosphere.2018.12.085
• Languages: English
• ISSNs: 0045-6535

Abstract

Abstract: Atenolol (ATL), a kind of largely used beta-blockers, has been widely detected in the aquatic environment, which could cause adverse impact on human beings. In this study, bismuth oxychloride (BiOCl) photocatalyst was synthesized and applied to remove ATL in the aqueous system under simulated natural light. Emphasis was laid on the reaction kinetics and the impact of natural organic matter (NOM) (0–20 mg/L). Possible transformation pathways were systematically investigated based on identification of reaction products via liquid chromatography-mass spectrometry (LC-MS). As a consequence, BiOCl presents highly photocatalytic efficiency yielding up to nearly 100% ATL conversion after 60 min of interaction, together with fairly high photostability evidenced by considerably efficient removal of ATL after 10 catalytic cycles. Four kinds of possible products are detected using LC-MS in the process of reaction, indicating possible transformation ways of ATL photocatalysis. NOM has an inhibiting impact on the removal of ATL and influences the products distribution. This study provides an emerging nanocatalyst for ATL photodegradation and could eventually lead to development of novel methods to control pharmaceutical contamination in water. Graphical abstract: Image 1 Highlights: Effective utilization of as-synthesized BiOCl on the removal of atenolol can be achieved during the process. Performance of BiOCl photocatalyst declines with the addition of natural organic matter. A conformational pathway for atenolol photodegradation by BiOCl is proposed. Photocatalyst is easy to recycle and can be efficiently used for more than 10 times.