Photocatalytic inactivation of Klebsiella pneumoniae by visible-light-responsive N/C-doped and N-tourmaline/palladium-C-codoped TiO2

บทความในวารสาร

ผู้เขียน/บรรณาธิการ

ไม่พบข้อมูลที่เกี่ยวข้อง

กลุ่มสาขาการวิจัยเชิงกลยุทธ์

รายละเอียดสำหรับงานพิมพ์

รายชื่อผู้แต่ง: Huang, Shang-Ming; Weng, Chih-Huang; Tzeng, Jing-Hua; Huang, Ya-Zhen; Anotai, Jin; Yen, Li-Ting; Chang, Che-Jui; Lin, Yao-Tung;

ผู้เผยแพร่: Elsevier

ปีที่เผยแพร่ (ค.ศ.): 2020

วารสาร: Chemical Engineering Journal (1385-8947)

Volume number: 379

นอก: 1385-8947

URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85069976439&doi=10.1016%2fj.cej.2019.122345&partnerID=40&md5=6ae263e5beba826adea36625c962b883

ภาษา: English-Great Britain (EN-GB)

ดูในเว็บของวิทยาศาสตร์ | ดูบนเว็บไซต์ของสำนักพิมพ์ | บทความในเว็บของวิทยาศาสตร์

บทคัดย่อ

Klebsiella pneumoniae is considered an emergent human pathogen that can rapidly spread through the public water supply. The frequently used chlorination process for water inactivation has a concern of producing toxic inactivation by-products (DBPs), which in turn lead to secondary pollution after inactivation. At present, the practical use of TiO2 photocatalyst is a developing alternative to water inactivation without DBPs. However, TiO2 is only efficiently activated by UV light. In this study, the performance of visible-light-responsive TiO2 composites (N-TiO2, N-T-TiO2, C-TiO2, and Pd-C-TiO2) in response to photocatalytic inactivation was investigated using K. pneumoniae as a surrogate. The effects of key parameters, including photocatalyst dosage, initial microbial concentration, and light intensity on photocatalytic inactivation, were also evaluated. Light-responsive Modified Hom's (LMH) kinetics was then modeled to characterize the light-absorption capacity of the photocatalyst during photocatalysis. Results indicated that the photocatalytic reaction rate increased with increasing photocatalyst dosage and light intensity but decreased with increasing initial bacterial concentration. Among the photocatalysts, Pd-C-TiO2 showed the highest capacity for bacterial inactivation under visible-light irradiation. For kinetic modeling, the LMH model confirmed the hypothesis that the inactivation rate highly corresponds to the light-absorption ability of the photocatalysts. This study proposes a new LMH model that could be a feasible kinetic approach for predicting powerful photocatalysts that can inactivate waterborne pathogens. © 2019

คำสำคัญ

Klebsiella pneumoniae, Pd-C-TiO2