Boron evaporation in thermally-driven seawater desalination: Effect of temperature and operating conditions

Handle URI:
http://hdl.handle.net/10754/627582
Title:
Boron evaporation in thermally-driven seawater desalination: Effect of temperature and operating conditions
Authors:
Alpatova, Alla; Alsaadi, Ahmad Salem ( 0000-0002-5334-8305 ) ; Ghaffour, Noreddine ( 0000-0003-2095-4736 )
Abstract:
The volatilization of boron in thermal desalination processes, namely multi-stage flash (MSF) and air-gap membrane distillation (AGMD) was investigated for the first time. This phenomenon was observed at feed temperatures above 55 °C in both studied processes. In simulated MSF process with two feeds, model boric acid and Red Sea water, boron concentration in distillate increased with feed temperature increase from 55 °C to 104 °C because of the increase in boric acid vapor pressure. Salinity and pH were the main factors controlling boron evaporation. The achieved boron concentrations in simulated MSF process were consistent with those measured in distillate samples collected from commercial MSF plants. The AGMD process also revealed a strong influence of operating temperature on boron removal. However, unlike MSF process, the boron concentration in AGMD permeate decreased with the feed temperature increase from 55 °C to 80 °C due probably to increase in vapor production and corresponding permeate dilution. When AGMD was operated in concentrating mode at a constant feed temperature of 80 °C, permeate boron concentration increased with process time due to concentration polarization and membrane fouling. A 10% flux decline observed after 21 h was attributed to CaCO scaling on the membrane surface.
KAUST Department:
Water Desalination and Reuse Research Center (WDRC); Biological and Environmental Sciences and Engineering (BESE) Division; Environmental Science and Engineering Program
Citation:
Alpatova A, Alsaadi A, Ghaffour N (2018) Boron evaporation in thermally-driven seawater desalination: Effect of temperature and operating conditions. Journal of Hazardous Materials 351: 224–231. Available: http://dx.doi.org/10.1016/j.jhazmat.2018.02.056.
Publisher:
Elsevier BV
Journal:
Journal of Hazardous Materials
Issue Date:
26-Mar-2018
DOI:
10.1016/j.jhazmat.2018.02.056
Type:
Article
ISSN:
0304-3894
Sponsors:
The research was supported by funding from King Abdullah University of Science and Technology (KAUST). The authors would like to thank Mr. Abdulrahman Aljadani and Dr. Abdelkader Meroufel and Dr. Mohammed Namazi for supplying water samples from commercial MSF plants. The authors appreciate Mrs. Tong Zhang for the ICP-MS training, Dr. Sheng Li for TOC/DOC analysis, and Mrs. Nini Wei for SEM imaging.
Additional Links:
https://www.sciencedirect.com/science/article/pii/S0304389418301444?via%3Dihub
Appears in Collections:
Articles; Environmental Science and Engineering Program; Water Desalination and Reuse Research Center (WDRC); Biological and Environmental Sciences and Engineering (BESE) Division

Full metadata record

DC FieldValue Language
dc.contributor.authorAlpatova, Allaen
dc.contributor.authorAlsaadi, Ahmad Salemen
dc.contributor.authorGhaffour, Noreddineen
dc.date.accessioned2018-04-22T11:41:28Z-
dc.date.available2018-04-22T11:41:28Z-
dc.date.issued2018-03-26en
dc.identifier.citationAlpatova A, Alsaadi A, Ghaffour N (2018) Boron evaporation in thermally-driven seawater desalination: Effect of temperature and operating conditions. Journal of Hazardous Materials 351: 224–231. Available: http://dx.doi.org/10.1016/j.jhazmat.2018.02.056.en
dc.identifier.issn0304-3894en
dc.identifier.doi10.1016/j.jhazmat.2018.02.056en
dc.identifier.urihttp://hdl.handle.net/10754/627582-
dc.description.abstractThe volatilization of boron in thermal desalination processes, namely multi-stage flash (MSF) and air-gap membrane distillation (AGMD) was investigated for the first time. This phenomenon was observed at feed temperatures above 55 °C in both studied processes. In simulated MSF process with two feeds, model boric acid and Red Sea water, boron concentration in distillate increased with feed temperature increase from 55 °C to 104 °C because of the increase in boric acid vapor pressure. Salinity and pH were the main factors controlling boron evaporation. The achieved boron concentrations in simulated MSF process were consistent with those measured in distillate samples collected from commercial MSF plants. The AGMD process also revealed a strong influence of operating temperature on boron removal. However, unlike MSF process, the boron concentration in AGMD permeate decreased with the feed temperature increase from 55 °C to 80 °C due probably to increase in vapor production and corresponding permeate dilution. When AGMD was operated in concentrating mode at a constant feed temperature of 80 °C, permeate boron concentration increased with process time due to concentration polarization and membrane fouling. A 10% flux decline observed after 21 h was attributed to CaCO scaling on the membrane surface.en
dc.description.sponsorshipThe research was supported by funding from King Abdullah University of Science and Technology (KAUST). The authors would like to thank Mr. Abdulrahman Aljadani and Dr. Abdelkader Meroufel and Dr. Mohammed Namazi for supplying water samples from commercial MSF plants. The authors appreciate Mrs. Tong Zhang for the ICP-MS training, Dr. Sheng Li for TOC/DOC analysis, and Mrs. Nini Wei for SEM imaging.en
dc.publisherElsevier BVen
dc.relation.urlhttps://www.sciencedirect.com/science/article/pii/S0304389418301444?via%3Dihuben
dc.rightsNOTICE: this is the author’s version of a work that was accepted for publication in Journal of Hazardous Materials. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Journal of Hazardous Materials, [351, , (2018-03-26)] DOI: 10.1016/j.jhazmat.2018.02.056 . © 2018. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/en
dc.subjectAir gap membrane distillation (AGMD)en
dc.subjectBoron rejectionen
dc.subjectBoron volatilizationen
dc.subjectMulti-stage flush (MSF)en
dc.subjectSeawater desalinationen
dc.titleBoron evaporation in thermally-driven seawater desalination: Effect of temperature and operating conditionsen
dc.typeArticleen
dc.contributor.departmentWater Desalination and Reuse Research Center (WDRC)en
dc.contributor.departmentBiological and Environmental Sciences and Engineering (BESE) Divisionen
dc.contributor.departmentEnvironmental Science and Engineering Programen
dc.identifier.journalJournal of Hazardous Materialsen
dc.eprint.versionPost-printen
kaust.authorAlpatova, Allaen
kaust.authorAlsaadi, Ahmad Salemen
kaust.authorGhaffour, Noreddineen
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