Photocatalytic degradation of sulfamethazine in aqueous solution using ZnO with different morphologies.

Abstract:

:In this study, photocatalytic experiments of 20 mg l-1 sulfamethazine (SMN) in aqueous solution containing ZnO with different morphologies, tetra-needle-like ZnO (T-ZnO), flower-like ZnO (F-ZnO) and nanoparticles ZnO (P-ZnO), were performed. The results indicated that photocatalytic degradation of SMN was effective and followed the pseudo-first-order reaction, but the degree of SMN mineralization showed obvious differences using ZnO with different shapes. After 12 h irradiation, 86%, 71% and 50% of the initial total organic carbon was eliminated in SMN suspension containing T-ZnO, F-ZnO and P-ZnO, respectively. The release ratio of sulfur was close to 100% in the presence of T-ZnO, but reached to 86% and 67% in the presence of F-ZnO and P-ZnO, respectively. The release ratio of nitrogen was about 76%, 63% and 40% using T-ZnO, F-ZnO and P-ZnO as photocatalyst, respectively. The morphology of ZnO played an important role in determining its catalytic activity. Seven intermediates were observed and identified in the UV/T-ZnO reaction system by LC-MS/MS analysis, and a possible degradation pathway was proposed.

journal_name

R Soc Open Sci

authors

Yi Z,Wang J,Jiang T,Tang Q,Cheng Y

doi

10.1098/rsos.171457

subject

Has Abstract

pub_date

2018-04-11 00:00:00

pages

171457

issue

4

issn

2054-5703

pii

rsos171457

journal_volume

5

pub_type

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