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Novel DGT method with tri-metal oxide adsorbent for in situ spatiotemporal flux measurement of fluoride in waters and sediments

To access, purchase, authenticate, or subscribe to the full-text of this article, please visit this link: http://dx.doi.org/10.1016/j.watres.2016.04.062 Byline: Chun-Yang Zhou (a), Dong-Xing Guan (a), Paul N. Williams (b), Jun Luo [esluojun@nju.edu.cn] (a,*), Lena Q. Ma (a,c) Keywords Fluoride; Diff... Full description

Journal Title: Water Research 01 August 2016, Vol.99, pp.200-208
Main Author: Zhou, Chun-Yang
Other Authors: Guan, Dong-Xing , Williams, Paul N , Luo, Jun , Ma, Lena Q
Format: Electronic Article Electronic Article
Language: English
Subjects:
ID: ISSN: 0043-1354 ; E-ISSN: 1879-2448 ; DOI: 10.1016/j.watres.2016.04.062
Link: https://www.sciencedirect.com/science/article/pii/S0043135416302974
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recordid: elsevier_sdoi_10_1016_j_watres_2016_04_062
title: Novel DGT method with tri-metal oxide adsorbent for in situ spatiotemporal flux measurement of fluoride in waters and sediments
format: Article
creator:
  • Zhou, Chun-Yang
  • Guan, Dong-Xing
  • Williams, Paul N
  • Luo, Jun
  • Ma, Lena Q
subjects:
  • Fluoride
  • Diffusive Gradients in Thin-Films
  • Sediment
  • Surface Water
  • Engineering
ispartof: Water Research, 01 August 2016, Vol.99, pp.200-208
description: To access, purchase, authenticate, or subscribe to the full-text of this article, please visit this link: http://dx.doi.org/10.1016/j.watres.2016.04.062 Byline: Chun-Yang Zhou (a), Dong-Xing Guan (a), Paul N. Williams (b), Jun Luo [esluojun@nju.edu.cn] (a,*), Lena Q. Ma (a,c) Keywords Fluoride; Diffusive gradients in thin-films; Sediment; Surface water Highlights * The low detection limit of DGT method assured application in low F.sup.- environment. * The high sorption capacity assured long-term deployment in high F.sup.- environment. * The DGT method functioned across a wide range of ionic strength and pH. * Apparent flux changes of F.sup.- were monitored across sediment-water interface. * In situ DGT measurement could substitute for active sampling. Abstract Natural mineral-water interface reactions drive ecosystem/global fluoride (F.sup.-) cycling. These small-scale processes prove challenging to monitoring due to mobilization being highly localized and variable; influenced by changing climate, hydrology, dissolution chemistries and pedogenosis. These release events could be captured in situ by the passive sampling technique, diffusive gradients in thin-films (DGT), providing a cost-effective and time-integrated measurement of F.sup.- mobilization. However, attempts to develop the method for F.sup.- have been unsuccessful due to the very restrictive operational ranges that most F.sup.--absorbents function within. A new hybrid-DGT technique for F.sup.- quantification containing a three-phase fine particle composite (Fe-Al-Ce, FAC) adsorbent was developed and evaluated. Sampler response was validated in laboratory and field deployments, passing solution chemistry QC within ionic strength and pH ranges of 0--200 mmol L.sup.-1 and 4.3--9.1, respectively, and exhibiting high sorption capacities (98 [plus or minus] 8 [mu]g cm.sup.-2). FAC-DGT measurements adequately predicted up to weeklong averaged in situ F.sup.- fluvial fluxes in a freshwater river and F.sup.- concentrations in a wastewater treatment flume determined by high frequency active sampling. While, millimetre-scale diffusive fluxes across the sediment-water interface were modeled for three contrasting lake bed sediments from a F.sup.--enriched lake using the new FAC-DGT platform. Author Affiliation: (a) State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing, 210023, People's Republic of China (b) Institute for Global Food Security, Sch
language: eng
source:
identifier: ISSN: 0043-1354 ; E-ISSN: 1879-2448 ; DOI: 10.1016/j.watres.2016.04.062
fulltext: no_fulltext
issn:
  • 0043-1354
  • 00431354
  • 1879-2448
  • 18792448
url: Link


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titleNovel DGT method with tri-metal oxide adsorbent for in situ spatiotemporal flux measurement of fluoride in waters and sediments
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subjectFluoride ; Diffusive Gradients in Thin-Films ; Sediment ; Surface Water ; Engineering
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descriptionTo access, purchase, authenticate, or subscribe to the full-text of this article, please visit this link: http://dx.doi.org/10.1016/j.watres.2016.04.062 Byline: Chun-Yang Zhou (a), Dong-Xing Guan (a), Paul N. Williams (b), Jun Luo [esluojun@nju.edu.cn] (a,*), Lena Q. Ma (a,c) Keywords Fluoride; Diffusive gradients in thin-films; Sediment; Surface water Highlights * The low detection limit of DGT method assured application in low F.sup.- environment. * The high sorption capacity assured long-term deployment in high F.sup.- environment. * The DGT method functioned across a wide range of ionic strength and pH. * Apparent flux changes of F.sup.- were monitored across sediment-water interface. * In situ DGT measurement could substitute for active sampling. Abstract Natural mineral-water interface reactions drive ecosystem/global fluoride (F.sup.-) cycling. These small-scale processes prove challenging to monitoring due to mobilization being highly localized and variable; influenced by changing climate, hydrology, dissolution chemistries and pedogenosis. These release events could be captured in situ by the passive sampling technique, diffusive gradients in thin-films (DGT), providing a cost-effective and time-integrated measurement of F.sup.- mobilization. However, attempts to develop the method for F.sup.- have been unsuccessful due to the very restrictive operational ranges that most F.sup.--absorbents function within. A new hybrid-DGT technique for F.sup.- quantification containing a three-phase fine particle composite (Fe-Al-Ce, FAC) adsorbent was developed and evaluated. Sampler response was validated in laboratory and field deployments, passing solution chemistry QC within ionic strength and pH ranges of 0--200 mmol L.sup.-1 and 4.3--9.1, respectively, and exhibiting high sorption capacities (98 [plus or minus] 8 [mu]g cm.sup.-2). FAC-DGT measurements adequately predicted up to weeklong averaged in situ F.sup.- fluvial fluxes in a freshwater river and F.sup.- concentrations in a wastewater treatment flume determined by high frequency active sampling. While, millimetre-scale diffusive fluxes across the sediment-water interface were modeled for three contrasting lake bed sediments from a F.sup.--enriched lake using the new FAC-DGT platform. Author Affiliation: (a) State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing, 210023, People's Republic of China (b) Institute for Global Food Security, School of Biological Sciences, Queen's University Belfast, Belfast, BT9 7BL, United Kingdom (c) Soil and Water Science Department, University of Florida, Gainesville, FL, 32611, USA * Corresponding author. Article History: Received 9 March 2016; Revised 6 April 2016; Accepted 27 April 2016
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