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author:

Fan, Gongduan (Fan, Gongduan.) [1] (Scholars:范功端) | Zhou, Jinjin (Zhou, Jinjin.) [2] | Zheng, Xiaomei (Zheng, Xiaomei.) [3] | Luo, Jing (Luo, Jing.) [4] | Hong, Liang (Hong, Liang.) [5] | Qu, Fangshu (Qu, Fangshu.) [6]

Indexed by:

EI Scopus SCIE

Abstract:

In this work, Metal-organic Frameworks (MOFs) were applied to inactivate algae under visible light with low doses. Five MOFs with different compositions (Zn and Fe; carboxylates or imidazolates) were successfully synthesized and characterized by XRD, SEM and UV-vis. The effects of MOFs on Microcystis aeruginosa were evaluated with regard to morphology characteristics, physiological activity, cell integrity and pigment degradation. The results indicated that Ag/AgCl@ZIF-8 outperformed MOF-235, ZIF-8, Bi2WO6/MIL-100(Fe) and BiOBr/MOF-5 in the degradation of chlorophyll a at the dose of 10 mg L-1. After 6 h of irradiation, 93.1% of Microcystis aeruginosa died and was unable to regrow and reproduce, which was demonstrated by changes in cell morphology, damage of cell membrane integrity and antioxidant enzyme system. Besides, the intracellular organic matter (IOM) and extracellular organic matter (EOM) were proven to be efficiently removed by MOF-assisted photocatalytic inactivation. Superoxide radical (O-2 center dot(-)) was demonstrated to be the major reactive oxygen species. A probable mechanism was proposed that the electrons in the valence band of Ag/AgCl@ZIF-8 transfer into the conduction band under irradiation to produce O-2 center dot- which inactivated the algae cells. Furthermore, Ag/AgCl@ZIF-8 can effectively remove Microcystis aeruginosa under sunlight and is of great application prospects for algae removal in real water bodies. (C) 2019 Elsevier Ltd. All rights reserved.

Keyword:

Mechanism Metal-organic frameworks Microcystis aeruginosa Photocatalysis Visible light

Community:

  • [ 1 ] [Fan, Gongduan]Fuzhou Univ, Coll Civil Engn, Fuzhou 350116, Fujian, Peoples R China
  • [ 2 ] [Zhou, Jinjin]Fuzhou Univ, Coll Civil Engn, Fuzhou 350116, Fujian, Peoples R China
  • [ 3 ] [Zheng, Xiaomei]Fuzhou Univ, Coll Civil Engn, Fuzhou 350116, Fujian, Peoples R China
  • [ 4 ] [Luo, Jing]Fuzhou Univ, Coll Civil Engn, Fuzhou 350116, Fujian, Peoples R China
  • [ 5 ] [Hong, Liang]Fuzhou Univ, Coll Civil Engn, Fuzhou 350116, Fujian, Peoples R China
  • [ 6 ] [Fan, Gongduan]Fuzhou Univ, State Key Lab Photocatalysis Energy & Environm, Fuzhou 350002, Fujian, Peoples R China
  • [ 7 ] [Qu, Fangshu]Guangzhou Univ, Sch Civil Engn, Guangzhou 510006, Guangdong, Peoples R China

Reprint 's Address:

  • 范功端

    [Fan, Gongduan]Fuzhou Univ, Coll Civil Engn, Fuzhou 350116, Fujian, Peoples R China;;[Qu, Fangshu]Guangzhou Univ, Sch Civil Engn, Guangzhou 510006, Guangdong, Peoples R China

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Source :

CHEMOSPHERE

ISSN: 0045-6535

Year: 2020

Volume: 239

7 . 0 8 6

JCR@2020

8 . 1 0 0

JCR@2023

ESI Discipline: ENVIRONMENT/ECOLOGY;

ESI HC Threshold:159

JCR Journal Grade:1

CAS Journal Grade:2

Cited Count:

WoS CC Cited Count: 47

SCOPUS Cited Count: 48

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 4

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