Recovering Zinc from electroplating wastewater by crystallization in a pellet reactor

Abstract A pellet reactor (PR) was used to investigate the ability for zinc recovery from electroplating wastewater. The pellet reactor is a fluidized bed reactor, in which the nucleated precipitation of heavy metals occurred on the surface of seeding material. The zinc removal efficiency was 75% at...

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Published inIOP conference series. Earth and environmental science Vol. 964; no. 1; pp. 12029 - 12038
Main Authors Hoang, Nhung Thi-Tuyet, Tran, Anh Thi-Kim
Format Journal Article
LanguageEnglish
Published Bristol IOP Publishing 01.01.2022
Subjects
Crystallization
Electroplating
electroplating wastewater
Flow rates
Fluidized bed reactors
Fluidized beds
Heavy metals
Industrial wastewater
Metal hydroxides
pellet reactor
Pellets
Plating
Reactors
Sand
Scanning electron microscopy
Sustainable development
Wastewater
Zinc carbonate
zinc recovery
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Summary:Abstract A pellet reactor (PR) was used to investigate the ability for zinc recovery from electroplating wastewater. The pellet reactor is a fluidized bed reactor, in which the nucleated precipitation of heavy metals occurred on the surface of seeding material. The zinc removal efficiency was 75% at molar ratio [CO 3 2- ]/[Zn 2+ ] of 2.5, the flowrate of 16 L/h, sand’s diameter of 0.25 – 0.5 mm, and sand’s mass of 50 g. The elemental analysis of zinc carbonate and zinc hydroxide crystallization was analyzed by X-ray energy dispersive spectrometer (EDS) and the surface was characterised by Scanning electron microscope (SEM) to get the morphological observation of the pellets after 38-day operation. This study demonstrated that the fluidized bed reactor can be considered a feasible method for zinc removal efficiency from electroplating wastewater to achieve sustainable development.
ISSN:1755-1307
1755-1315
DOI:10.1088/1755-1315/964/1/012029