Effective water disinfection using magnetic barium phosphate nanoflakes loaded with Ag nanoparticles

Fan Zhang, Meng Hao Lee, Yuxiong Huang, Arturo A. Keller, Sanghamitra Majumdar, Pabel Cervantes-Avilés, Xiaoxiu Tang, Siqiao Yin

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

In this work, novel magnetic nanocomposites, Fe 3 O 4 @Ba 3 (PO 4 ) 2 (denominated FBP) nanoflakes loaded with Ag nanoparticles (NPs) (denominated FBPA), were reported for cleaning E. coli from water. FBPA with 1 wt% Ag (denominated FBPA1) showed a higher adsorption efficiency (94%) than FBPA with 10 wt% Ag (denominated FBPA10), for water heavily contaminated with E. coli (5 × 10 8 CFU/mL), both at a dosage of 1 g/L within 10 min. Importantly, the loaded Ag NPs can greatly improve the disinfection effect of FBP due to the great antimicrobial activity of Ag NPs via the released Ag + . Confocal fluorescent images and dilution plating results showed that ∼100% of E. coli could be inactivated by FBPA1 within 10 min. The calculated disinfection capacity was higher than some other materials. Three co-existed salts in solutions decreased the disinfection efficiency of FBPA1 to be ∼67% (NaCl), ∼59% (CaCl 2 ), and ∼41% (MgCl 2 ). Furthermore, FBPA1 can be reclaimed via a magnet to be reused. FBPA1 maintained an adsorption efficiency of 86%, disinfection effect of 70%, and ∼90% of loaded Ag NPs after the fifth recover and reuse cycle.

Original languageEnglish (US)
Pages (from-to)173-182
Number of pages10
JournalJournal of Cleaner Production
Volume218
DOIs
StatePublished - May 1 2019

Bibliographical note

Funding Information:
This work was supported by the National Natural Science Funds of China (No. 51402153), the Jiangsu Natural Science Funds of China (No. SBK2017020336), and the Fundamental Research Funds for the Central Universities (No. KYZ201747). This work was partly supported by the National Science Foundation and the U.S. Environmental Protection Agency under NSF-EF0830117. AAK also appreciates Agilent Technologies for their Agilent Thought Leader Award.

Funding Information:
This work was supported by the National Natural Science Funds of China (No. 51402153 ), the Jiangsu Natural Science Funds of China (No. SBK2017020336 ), and the Fundamental Research Funds for the Central Universities (No. KYZ201747 ). This work was partly supported by the National Science Foundation and the U.S. Environmental Protection Agency under NSF-EF0830117 . AAK also appreciates Agilent Technologies for their Agilent Thought Leader Award.

Publisher Copyright:
© 2019 Elsevier Ltd

Copyright:
Copyright 2019 Elsevier B.V., All rights reserved.

Keywords

  • Ag NPs loaded magnetic nanoflake
  • Disinfection
  • E. coli adsorption
  • Reusability
  • Water treatment

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