BROWSE

Related Researcher

Author's Photo

Cho, Jaeweon
도시환경 감각연구소/Sense Laboratory
Research Interests
  • Convergence of Science and Arts; Environment Ethics; Meta-modernism in Semantics Engineering

ITEM VIEW & DOWNLOAD

Application of nanofiltration pretreatment to remove divalent ions for economical seawater reverse osmosis desalination

Cited 0 times inthomson ciCited 0 times inthomson ci
Title
Application of nanofiltration pretreatment to remove divalent ions for economical seawater reverse osmosis desalination
Author
Park, MinhoPark, JongkwanLee, EunkyungKhim, JeehyeongCho, Jaeweon
Issue Date
2016-09
Publisher
DESALINATION PUBL
Citation
DESALINATION AND WATER TREATMENT, v.57, no.44, pp.20661 - 20670
Abstract
To minimize scale formation potential in the applications of reverse osmosis (RO) membranes as a pretreatment unit, relatively loose nanofiltration (NF) membrane systems coupled with ultrafiltration (UF) were used to remove divalent ions from seawater. However, the UF did not reject any ions because of pore size. The rejection of divalent ions by NF was in order of sulfate (>95%), magnesium (>60%), and calcium (>30%) in every rejection experiment based on water recovery rate (40, 50, 60, 70, and 80%). In the UF/NF/RO hybrid pilot system, most of the divalent (>99%) and the monovalent (>97%) ions were effectively rejected with slightly increased divalent ion rejection compared to the UF/RO system. Seawater temperature influenced rejection of ions with regards to either the diffusion- or convection-dominant transport of ions through the membrane pores. Electric power consumption was also compared between the UF/NF/RO process and the UF/RO process. For different salinity conditions (28,000 and 45,000mg/L of total dissolved solids), the lowest energy consumption by NF/RO was 3.3 and 6kWh/m(3) with recovery of 80% for NF and 40% for RO, respectively.
URI
https://scholarworks.unist.ac.kr/handle/201301/17955
URL
http://www.tandfonline.com/doi/full/10.1080/19443994.2015.1111807#.VmjoR9LhBpg
DOI
10.1080/19443994.2015.1111807
ISSN
1944-3994
Appears in Collections:
UEE_Journal Papers
Files in This Item:
There are no files associated with this item.

find_unist can give you direct access to the published full text of this article. (UNISTARs only)

Show full item record

qrcode

  • mendeley

    citeulike

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

MENU