Removal of ions in nickel electroplating rinse water using low-pressure nanofiltration

Title
Removal of ions in nickel electroplating rinse water using low-pressure nanofiltration
Authors
안규홍송경근차호영염익태
Keywords
Nanofiltration; Wastewater reuse; Nickel electroplating; Rinse water; Ion rejection
Issue Date
1999-01
Publisher
Desalination
Citation
VOL 122, 77-84
Abstract
This study investigated the performance ofnanofiltration (NF), which is more economic than reverse osmosis (RO) and requires lower pressure for the removal of cations and anions in simulated nickel electroplating rinse water environments. Removal rates according to changes in basic parameters such as pressure, crossflow velocity, pH, ion types and ion concentrations were observed. In single-salt system experiments NF removed more Ni 2÷ in NiSO 4 solution than in NiC12 solution. As concentration increased in single-salt systems, removal rate of sulfate salts and some chloride salts (in the system with cations of+l valency) decreased, whereas chloride salts with cations of+2 valency increased. In the experiment with multi-salt systems, the removal rate of ions showed a logarithmic increase with pressure until 3 kgf/cm 2 (0.294MPa), and beyond this value the removal rate stabilized. Change in crossflow velocity did not affect the ion removal, but change in pH was a significant factor for C1- removal rate. Furthermore, the removal rate of Clwas heavily dependent on the amount of SO 2- present in the same system. In experiments using simulated nickel electroplating rinse water below a pressure of 3 kgf/cm 2, the removal efficiencies of ions increased greatly with increased influent salt concentration and pressure, whereas beyond 3 kgf/cm 2, the removal efficiency stabilized. This result indicated that 3 kgf/cm 2 is the optimum pressure for NF application against nickel electroplating rinse water.
URI
http://pubs.kist.re.kr/handle/201004/18466
ISSN
0011-9164
Appears in Collections:
KIST Publication > Article
Files in This Item:
There are no files associated with this item.
Export
RIS (EndNote)
XLS (Excel)
XML


qrcode

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

BROWSE