Study on pre-concentration of trace heavy metal ions in water quality detection using FO-electroosmotic integrated chip

Cui, Z; Zhang, M; Yuan, Y; Jia, H; Hao Ngo, H; Wang, J

Study on pre-concentration of trace heavy metal ions in water quality detection using FO-electroosmotic integrated chip

Cui, Z Zhang, M Yuan, Y Jia, H Hao Ngo, H Wang, J

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Publisher:: Elsevier
Publication Type:: Journal Article
Citation:: Chemical Engineering Journal, 2023, 472, pp. 144968
Issue Date:: 2023-09-15

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Field	Value	Language
dc.contributor.author	Cui, Z
dc.contributor.author	Zhang, M
dc.contributor.author	Yuan, Y
dc.contributor.author	Jia, H
dc.contributor.author	Hao Ngo, H
dc.contributor.author	Wang, J
dc.date.accessioned	2024-03-11T02:00:21Z
dc.date.available	2024-03-11T02:00:21Z
dc.date.issued	2023-09-15
dc.identifier.citation	Chemical Engineering Journal, 2023, 472, pp. 144968
dc.identifier.issn	1385-8947
dc.identifier.uri	http://hdl.handle.net/10453/176443
dc.description.abstract	The focus of this study is on the enhanced concentration effect of the pump effect in forward osmosis (FO) and electroosmotic integrated chip. The study investigates the strengthening effect of the FO process, driven by the pump effect, on the electroosmotic flow process under the same energy consumption, using low-concentration heavy metal ions (Cr3+) as the target enrichment. In the chip system, the pump effect, caused by capillary pressure difference, successfully replaces the osmotic pressure of the draw solution as a new driving force for the FO process. By adjusting the size and number of channels and avoiding errors, the study achieves the highest efficiency of the FO process in the chip, concentrating Cr3+ from 1.26 × 10−4 mol/L to 8.01 × 10−4 mol/L (6.4 times) within 32 min. Excluding the influence of the electrokinetic (EK) limit of low-concentration samples, the concentration efficiency of an individual electroosmotic chip in this study is positively correlated with cross-nanochannel voltage (Vcn). The integrated FO and electroosmosis chip reduce the duration required to concentrate 50 mL Cr3+ sample to the limit from 90 min to 16 min (5.6 times) compared to the single electroosmotic process. Furthermore, a series of Cr3+ samples with concentrations below the detection limit of the UV–vis spectrophotometer were concentrated and detected by the integrated chip. The results indicate that the concentration limit of the FO-electroosmotic integrated chip for samples can increase the detection limit of Cr3+ from 1.37 × 10−4 mol/L to 3.67 × 10−6 mol/L.
dc.language	en
dc.publisher	Elsevier
dc.relation.ispartof	Chemical Engineering Journal
dc.relation.isbasedon	10.1016/j.cej.2023.144968
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject	0904 Chemical Engineering, 0905 Civil Engineering, 0907 Environmental Engineering
dc.subject.classification	Chemical Engineering
dc.subject.classification	4004 Chemical engineering
dc.subject.classification	4011 Environmental engineering
dc.subject.classification	4016 Materials engineering
dc.title	Study on pre-concentration of trace heavy metal ions in water quality detection using FO-electroosmotic integrated chip
dc.type	Journal Article
utslib.citation.volume	472
utslib.for	0904 Chemical Engineering
utslib.for	0905 Civil Engineering
utslib.for	0907 Environmental Engineering
pubs.organisational-group	University of Technology Sydney
pubs.organisational-group	University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	University of Technology Sydney/Faculty of Engineering and Information Technology/School of Civil and Environmental Engineering
pubs.organisational-group	University of Technology Sydney/Strength - CTWW - Centre for Technology in Water and Wastewater Treatment
utslib.copyright.status	closed_access	*
dc.date.updated	2024-03-11T02:00:20Z
pubs.publication-status	Published
pubs.volume	472

Abstract:

The focus of this study is on the enhanced concentration effect of the pump effect in forward osmosis (FO) and electroosmotic integrated chip. The study investigates the strengthening effect of the FO process, driven by the pump effect, on the electroosmotic flow process under the same energy consumption, using low-concentration heavy metal ions (Cr3+) as the target enrichment. In the chip system, the pump effect, caused by capillary pressure difference, successfully replaces the osmotic pressure of the draw solution as a new driving force for the FO process. By adjusting the size and number of channels and avoiding errors, the study achieves the highest efficiency of the FO process in the chip, concentrating Cr3+ from 1.26 × 10−4 mol/L to 8.01 × 10−4 mol/L (6.4 times) within 32 min. Excluding the influence of the electrokinetic (EK) limit of low-concentration samples, the concentration efficiency of an individual electroosmotic chip in this study is positively correlated with cross-nanochannel voltage (Vcn). The integrated FO and electroosmosis chip reduce the duration required to concentrate 50 mL Cr3+ sample to the limit from 90 min to 16 min (5.6 times) compared to the single electroosmotic process. Furthermore, a series of Cr3+ samples with concentrations below the detection limit of the UV–vis spectrophotometer were concentrated and detected by the integrated chip. The results indicate that the concentration limit of the FO-electroosmotic integrated chip for samples can increase the detection limit of Cr3+ from 1.37 × 10−4 mol/L to 3.67 × 10−6 mol/L.

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http://hdl.handle.net/10453/176443