Analysis of Boron Removal for Reverse Osmosis, Ion Exchange, and Capacitive Deionization

Objectives:This article provides a comparative analysis of boron removal for brackish water reverse osmosis (BWRO), boron selective ion exchange (IX), or capacitive deionization (CDI) processes. Permeate of 1st-Pass RO process has to be post-treated for additional boron removal. Hence, we experiment...

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Autores principales:	Yu Chang Kim, Sungil Lim, Bangwoo Han, Sang Bok Kim, Inyong Park, Gunhee Lee, Dae Hoon Park, Keejung Hong
Formato:	article
Lenguaje:	EN KO
Publicado:	Korean Society of Environmental Engineers 2021
Materias:	boron removal desalination reverse osmosis ion exchange capacitive deionization Environmental engineering TA170-171
Acceso en línea:	https://doi.org/10.4491/KSEE.2021.43.10.654 https://doaj.org/article/8d5ee155ca43416b94b948eeb4a2dec7
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spelling	oai:doaj.org-article:8d5ee155ca43416b94b948eeb4a2dec72021-11-12T00:43:02ZAnalysis of Boron Removal for Reverse Osmosis, Ion Exchange, and Capacitive Deionizationhttps://doi.org/10.4491/KSEE.2021.43.10.6541225-50252383-7810https://doaj.org/article/8d5ee155ca43416b94b948eeb4a2dec72021-10-01T00:00:00Zhttps://www.jksee.or.kr/journal/view.php?number=4362https://doaj.org/toc/1225-5025https://doaj.org/toc/2383-7810Objectives:This article provides a comparative analysis of boron removal for brackish water reverse osmosis (BWRO), boron selective ion exchange (IX), or capacitive deionization (CDI) processes. Permeate of 1st-Pass RO process has to be post-treated for additional boron removal. Hence, we experimentally analyzed the performance of boron removal and specific energy consumption (SEC) of three aforementioned processes and investigated whether the processes are suitable for 2nd pass process of RO desalination. Methods:Raw feed water was prepared using NaCl and B(OH)3. Semi-pilot scale RO and IX systems (over 1 m3/hr capacity) and bench scale CDI system (over 2.5 L/min) were tested for performance comparison. Boron concentration was measured using Azomethine-H method for feed and product water. Energy consumption was monitored by using power quality analyzer. Results and Discussion:Each process has its own operating conditions. The RO process required high pH of feed water for high boron removal rate, the IX process was operated below breakthrough point considering adsorption capacity of boron selective resin, and the CDI process didn’t remove boron because chloride ion has higher ion selectivity for carbon electrode than boron. In terms of SEC, the pressure-driven RO process showed the highest SEC among three processes. The CDI process based on electrical adsorption of carbon electrode showed a considerable energy consumption as well. On the other hand, the IX process was operated at low energy consumption because its removal is just based on adsorption-desorption mechanism. Conclusions:The RO and CDI processes have received a lot of attention as leading and emerging technology while the IX process was regarded as a stubborn process because of regeneration of resin and its several segmentalized steps. However, we found that the IX process has a better performance for boron removal and energy consumption.Yu Chang KimSungil LimBangwoo HanSang Bok KimInyong ParkGunhee LeeDae Hoon ParkKeejung HongKorean Society of Environmental Engineersarticleboron removaldesalinationreverse osmosision exchangecapacitive deionizationEnvironmental engineeringTA170-171ENKO대한환경공학회지, Vol 43, Iss 10, Pp 654-663 (2021)
institution	DOAJ
collection	DOAJ
language	EN KO
topic	boron removal desalination reverse osmosis ion exchange capacitive deionization Environmental engineering TA170-171
spellingShingle	boron removal desalination reverse osmosis ion exchange capacitive deionization Environmental engineering TA170-171 Yu Chang Kim Sungil Lim Bangwoo Han Sang Bok Kim Inyong Park Gunhee Lee Dae Hoon Park Keejung Hong Analysis of Boron Removal for Reverse Osmosis, Ion Exchange, and Capacitive Deionization
description	Objectives:This article provides a comparative analysis of boron removal for brackish water reverse osmosis (BWRO), boron selective ion exchange (IX), or capacitive deionization (CDI) processes. Permeate of 1st-Pass RO process has to be post-treated for additional boron removal. Hence, we experimentally analyzed the performance of boron removal and specific energy consumption (SEC) of three aforementioned processes and investigated whether the processes are suitable for 2nd pass process of RO desalination. Methods:Raw feed water was prepared using NaCl and B(OH)3. Semi-pilot scale RO and IX systems (over 1 m3/hr capacity) and bench scale CDI system (over 2.5 L/min) were tested for performance comparison. Boron concentration was measured using Azomethine-H method for feed and product water. Energy consumption was monitored by using power quality analyzer. Results and Discussion:Each process has its own operating conditions. The RO process required high pH of feed water for high boron removal rate, the IX process was operated below breakthrough point considering adsorption capacity of boron selective resin, and the CDI process didn’t remove boron because chloride ion has higher ion selectivity for carbon electrode than boron. In terms of SEC, the pressure-driven RO process showed the highest SEC among three processes. The CDI process based on electrical adsorption of carbon electrode showed a considerable energy consumption as well. On the other hand, the IX process was operated at low energy consumption because its removal is just based on adsorption-desorption mechanism. Conclusions:The RO and CDI processes have received a lot of attention as leading and emerging technology while the IX process was regarded as a stubborn process because of regeneration of resin and its several segmentalized steps. However, we found that the IX process has a better performance for boron removal and energy consumption.
format	article
author	Yu Chang Kim Sungil Lim Bangwoo Han Sang Bok Kim Inyong Park Gunhee Lee Dae Hoon Park Keejung Hong
author_facet	Yu Chang Kim Sungil Lim Bangwoo Han Sang Bok Kim Inyong Park Gunhee Lee Dae Hoon Park Keejung Hong
author_sort	Yu Chang Kim
title	Analysis of Boron Removal for Reverse Osmosis, Ion Exchange, and Capacitive Deionization
title_short	Analysis of Boron Removal for Reverse Osmosis, Ion Exchange, and Capacitive Deionization
title_full	Analysis of Boron Removal for Reverse Osmosis, Ion Exchange, and Capacitive Deionization
title_fullStr	Analysis of Boron Removal for Reverse Osmosis, Ion Exchange, and Capacitive Deionization
title_full_unstemmed	Analysis of Boron Removal for Reverse Osmosis, Ion Exchange, and Capacitive Deionization
title_sort	analysis of boron removal for reverse osmosis, ion exchange, and capacitive deionization
publisher	Korean Society of Environmental Engineers
publishDate	2021
url	https://doi.org/10.4491/KSEE.2021.43.10.654 https://doaj.org/article/8d5ee155ca43416b94b948eeb4a2dec7
work_keys_str_mv	AT yuchangkim analysisofboronremovalforreverseosmosisionexchangeandcapacitivedeionization AT sungillim analysisofboronremovalforreverseosmosisionexchangeandcapacitivedeionization AT bangwoohan analysisofboronremovalforreverseosmosisionexchangeandcapacitivedeionization AT sangbokkim analysisofboronremovalforreverseosmosisionexchangeandcapacitivedeionization AT inyongpark analysisofboronremovalforreverseosmosisionexchangeandcapacitivedeionization AT gunheelee analysisofboronremovalforreverseosmosisionexchangeandcapacitivedeionization AT daehoonpark analysisofboronremovalforreverseosmosisionexchangeandcapacitivedeionization AT keejunghong analysisofboronremovalforreverseosmosisionexchangeandcapacitivedeionization
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Analysis of Boron Removal for Reverse Osmosis, Ion Exchange, and Capacitive Deionization

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