Open AccessRecovering Zinc from electroplating wastewater by crystallization in a pellet reactor
Author(s) -
Nhung Thi–Tuyet Hoang,
Anh T.K. Tran
Publication year - 2022
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.179
H-Index - 26
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/964/1/012029
Subject(s) - zinc , electroplating , pellet , materials science , fluidized bed , scanning electron microscope , wastewater , crystallization , pellets , precipitation , metallurgy , chemical engineering , waste management , composite material , physics , layer (electronics) , meteorology , engineering
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.