Adsorption applications of unmodified geothermal silica

Halldor G. Svavarsson; Sigurbjorn Einarsson; Asa Brynjolfsdottir

doi:10.1016/j.geothermics.2013.08.001

Adsorption applications of unmodified geothermal silica

Halldor G. Svavarsson^*, Sigurbjorn Einarsson, Asa Brynjolfsdottir

^*Corresponding author for this work

Department of Engineering

Research output: Contribution to journal › Article › peer-review

3 Citations (Scopus)

Abstract

Silica, precipitated out of geothermal fluid discharged from a geothermal powerplant in Svartsengi on the Reykjanes peninsula in Iceland, was used as a chromatographic adsorbent to extract blue colored protein, C-phycocyanin, from coccoid blue-green algae. The only supplement used was salt obtained by evaporating the geothermal fluid. Analysis of the silica, using scanning electron microscopy, X-ray diffractometry and Brunauer-Emmett-Teller (BET) adsorption confirmed it has a high specific surface area and is amorphous. Upon adsorption and subsequent elution the purity of the extracted protein, measured as the ratio of the light absorbance of 620 and 280. nm, increased from 0.5 to above 2.0. Our results could facilitate utilization of a mostly unused byproduct of geothermal powerplants as chromatographic material.

Original language	English
Pages (from-to)	30-34
Number of pages	5
Journal	Geothermics
Volume	50
DOIs	https://doi.org/10.1016/j.geothermics.2013.08.001
Publication status	Published - Apr 2014

Bibliographical note

Funding Information:
This research was supported in part by the Icelandic Technology Development Fund and the Energy Fund of the National Energy Authority .

Other keywords

Adsorption
Chromatographic
Geothermal silica
Phycocyanin
Protein separation

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10.1016/j.geothermics.2013.08.001

Cite this

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title = "Adsorption applications of unmodified geothermal silica",

abstract = "Silica, precipitated out of geothermal fluid discharged from a geothermal powerplant in Svartsengi on the Reykjanes peninsula in Iceland, was used as a chromatographic adsorbent to extract blue colored protein, C-phycocyanin, from coccoid blue-green algae. The only supplement used was salt obtained by evaporating the geothermal fluid. Analysis of the silica, using scanning electron microscopy, X-ray diffractometry and Brunauer-Emmett-Teller (BET) adsorption confirmed it has a high specific surface area and is amorphous. Upon adsorption and subsequent elution the purity of the extracted protein, measured as the ratio of the light absorbance of 620 and 280. nm, increased from 0.5 to above 2.0. Our results could facilitate utilization of a mostly unused byproduct of geothermal powerplants as chromatographic material.",

keywords = "Adsorption, Chromatographic, Geothermal silica, Phycocyanin, Protein separation",

author = "Svavarsson, {Halldor G.} and Sigurbjorn Einarsson and Asa Brynjolfsdottir",

note = "Funding Information: This research was supported in part by the Icelandic Technology Development Fund and the Energy Fund of the National Energy Authority . ",

year = "2014",

month = apr,

doi = "10.1016/j.geothermics.2013.08.001",

language = "English",

volume = "50",

pages = "30--34",

journal = "Geothermics",

issn = "0375-6505",

publisher = "Elsevier Ltd.",

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TY - JOUR

T1 - Adsorption applications of unmodified geothermal silica

AU - Svavarsson, Halldor G.

AU - Einarsson, Sigurbjorn

AU - Brynjolfsdottir, Asa

N1 - Funding Information: This research was supported in part by the Icelandic Technology Development Fund and the Energy Fund of the National Energy Authority .

PY - 2014/4

Y1 - 2014/4

N2 - Silica, precipitated out of geothermal fluid discharged from a geothermal powerplant in Svartsengi on the Reykjanes peninsula in Iceland, was used as a chromatographic adsorbent to extract blue colored protein, C-phycocyanin, from coccoid blue-green algae. The only supplement used was salt obtained by evaporating the geothermal fluid. Analysis of the silica, using scanning electron microscopy, X-ray diffractometry and Brunauer-Emmett-Teller (BET) adsorption confirmed it has a high specific surface area and is amorphous. Upon adsorption and subsequent elution the purity of the extracted protein, measured as the ratio of the light absorbance of 620 and 280. nm, increased from 0.5 to above 2.0. Our results could facilitate utilization of a mostly unused byproduct of geothermal powerplants as chromatographic material.

AB - Silica, precipitated out of geothermal fluid discharged from a geothermal powerplant in Svartsengi on the Reykjanes peninsula in Iceland, was used as a chromatographic adsorbent to extract blue colored protein, C-phycocyanin, from coccoid blue-green algae. The only supplement used was salt obtained by evaporating the geothermal fluid. Analysis of the silica, using scanning electron microscopy, X-ray diffractometry and Brunauer-Emmett-Teller (BET) adsorption confirmed it has a high specific surface area and is amorphous. Upon adsorption and subsequent elution the purity of the extracted protein, measured as the ratio of the light absorbance of 620 and 280. nm, increased from 0.5 to above 2.0. Our results could facilitate utilization of a mostly unused byproduct of geothermal powerplants as chromatographic material.

KW - Adsorption

KW - Chromatographic

KW - Geothermal silica

KW - Phycocyanin

KW - Protein separation

UR - http://www.scopus.com/inward/record.url?scp=84883526877&partnerID=8YFLogxK

U2 - 10.1016/j.geothermics.2013.08.001

DO - 10.1016/j.geothermics.2013.08.001

M3 - Article

AN - SCOPUS:84883526877

SN - 0375-6505

VL - 50

SP - 30

EP - 34

JO - Geothermics

JF - Geothermics

ER -

Adsorption applications of unmodified geothermal silica

Abstract

Bibliographical note

Other keywords

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