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Title: Use of electrospun fiber mats for the remediation of hypersaline geothermal brine
Authors: Çelik, Aslı
Koç, Gonca
Erdoğan, Emre
Shahwan, Talal
Baba, Alper
Demir, Mustafa Muammer
Çelik, Aslı
Baba, Alper
Demir, Mustafa Muammer
Izmir Institute of Technology. Materials Science and Engineering
Keywords: Chitosan
Geothermal fluid
Issue Date: Feb-2017
Publisher: Desalination Publications
Source: Çelik, A., Koç, G., Erdoğan, E., Shahwan, T., Baba, A., and Demir, M. M. (2017). Use of electrospun fiber mats for the remediation of hypersaline geothermal brine. Desalination and Water Treatment, 62, 94-100. doi:10.5004/dwt.2017.20151
Abstract: Geothermal brines display high contents of various metal ions that can adversely affect surface and groundwater resources. Nevertheless, it is possible to sequestrate these metals and use some of them in certain engineering applications. The aim of this study was to fabricate electrospun chitosan fiber mats and remove heavy metal cations from geothermal brine of the Tuzla geothermal field (TGF) by employing these mats. TGF is located on the Biga Peninsula in the northwestern part of Turkey. The brine of TGF has high salinity (EC > 91 mS/cm) and high temperature (reservoir temperature is 173°C). The brine is rich in terms of metal cations. For instance, the concentration of lithium ion in geothermal fluid ranges from 17 to 35 mg/L, with little seasonal variations. A horizontal electrospinning setup was employed to obtain a non-woven mat comprising submicron diameter chitosan fibers at 2.0 kV∙cm−1. This material was then utilized as a stable membrane for the removal of metal ions present in the brine through sorption at 25°C overnight. The results showed that the chitosan fiber mats sequestrate various ions in the brine. Under the studied conditions, the material was capable of removing 46%, 44%, 50%, 44%, 40%, 67% and 48% of Li+, Mg2+, Ba2+, Sr2+, Mn2+, Ca2+ and K+ from the geothermal brine, respectively.
ISSN: 1944-3994
Appears in Collections:Civil Engineering / İnşaat Mühendisliği
Materials Science and Engineering / Malzeme Bilimi ve Mühendisliği
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

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