Mechanisms of removal of heavy metal ions by ZnO particles

Effluent discharges from industry and domestic waste containing unknown inorganic pollutants. In this work, different mechanisms of heavy metal ions removal using ZnO particles were studied. ZnO particles were synthesized using solid precipitation technique. The morphology of ZnO particles was rod-l...

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Bibliographic Details
Published in:Heliyon Vol. 5; no. 4; p. e01440
Main Authors: Le, Anh Thi, Pung, Swee-Yong, Sreekantan, Srimala, Matsuda, Atsunori, Huynh, Dai Phu
Format: Journal Article
Language:English
Published: England Elsevier Ltd 01.04.2019
Elsevier BV
Elsevier
Subjects:
adsorption
H1-99
heavy metals
industry
Materials science
Nanotechnology
oxidation
Q1-390
Science (General)
Social sciences (General)
ultraviolet radiation
wastes
Materials science
Nanotechnology
ISSN:2405-8440, 2405-8440
Online Access:Get full text
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Summary:Effluent discharges from industry and domestic waste containing unknown inorganic pollutants. In this work, different mechanisms of heavy metal ions removal using ZnO particles were studied. ZnO particles were synthesized using solid precipitation technique. The morphology of ZnO particles was rod-like shape. The average length and diameter of ZnO particle were 497.34 ± 15.55 and 75.78 ± 10.39nm, respectively. These particles removed effectively heavy metal ions such as Cu(II), Ag(I) and Pb(II) ions with efficiency >85% under exposure of 1 hour of UV light. However, poor removal efficiency, i.e. <15% was observed for Cr(VI), Mn(II), Cd(II) and Ni(II) ions. The removal of these heavy metal ions was in the forms of metals or metal oxide via reduction/oxidation or adsorption mechanism.
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ISSN:2405-8440
2405-8440
DOI:10.1016/j.heliyon.2019.e01440