In situ selective measurement based on Diffusive Gradients in Thin-Films technique with mercapto-functionalized mesoporous silica for high-resolution imaging of SbIII in soil

Wen Fang, Xinyao Shi, Danxing Yang, Xuan Hu, Paul N. Williams, Bingqing Shi, Zhaodong Liu, Jun Luo *

*Corresponding author for this work

Research output: Contribution to journalArticle

Abstract

In situ monitoring of Sb speciation improves the understanding of Sb biogeochemistry and toxicity in ecosystems. Precise measurement of Sb is a challenge due to its instability of oxidation and ultra-trace concentration. The development of simple and reliable methods specific to SbIII measurement is not only appealing but essential for implementing regulations. Here, we present an in situ speciation analysis method for SbIII, using the diffusive gradients in thin films (DGT) technique, combined with mercapto functionalized SBA-15 mesoporous silica nanoparticles (MSBA). Laboratory performance tests confirmed MSBA–DGT uptake was independent of pH (4–9) and ionic strength (0.1–200 mmol L–1). DGT devices equipped with MSBA-based binding gels showed a theoretically linear accumulation of SbIII and exhibited high capacity for SbIII at 65 μg per gel disc, with negligible accumulation of SbV over a 72 h deployment. Compared with commercial 3-Mercaptopropyl functionalized silica (MFS), the nano-sized MSBA facilitate its even distribution in the binding gels. Furthermore, the good selectivity and high homogeneity of the MSBA gel enabled it to be applied in a rice rhizosphere in conjunction with AgI gel to investigate the effects of sulfur application on the SbIII solubility. In summary, the newly developed MSBA–DGT provides a selective measurement of SbIII, showing potential for environmental monitoring and further application in understanding biogeochemical process of Sb.
Original languageEnglish
JournalAnalytical Chemistry
Early online date09 Jan 2020
DOIs
Publication statusEarly online date - 09 Jan 2020

Fingerprint

Silicon Dioxide
Gels
Soils
Imaging techniques
Thin films
Biogeochemistry
Thin film devices
Monitoring
Ionic strength
Sulfur
Ecosystems
Toxicity
Solubility
Nanoparticles
Oxidation

Cite this

@article{3f3de91578f54294ba1a8a09d755535b,
title = "In situ selective measurement based on Diffusive Gradients in Thin-Films technique with mercapto-functionalized mesoporous silica for high-resolution imaging of SbIII in soil",
abstract = "In situ monitoring of Sb speciation improves the understanding of Sb biogeochemistry and toxicity in ecosystems. Precise measurement of Sb is a challenge due to its instability of oxidation and ultra-trace concentration. The development of simple and reliable methods specific to SbIII measurement is not only appealing but essential for implementing regulations. Here, we present an in situ speciation analysis method for SbIII, using the diffusive gradients in thin films (DGT) technique, combined with mercapto functionalized SBA-15 mesoporous silica nanoparticles (MSBA). Laboratory performance tests confirmed MSBA–DGT uptake was independent of pH (4–9) and ionic strength (0.1–200 mmol L–1). DGT devices equipped with MSBA-based binding gels showed a theoretically linear accumulation of SbIII and exhibited high capacity for SbIII at 65 μg per gel disc, with negligible accumulation of SbV over a 72 h deployment. Compared with commercial 3-Mercaptopropyl functionalized silica (MFS), the nano-sized MSBA facilitate its even distribution in the binding gels. Furthermore, the good selectivity and high homogeneity of the MSBA gel enabled it to be applied in a rice rhizosphere in conjunction with AgI gel to investigate the effects of sulfur application on the SbIII solubility. In summary, the newly developed MSBA–DGT provides a selective measurement of SbIII, showing potential for environmental monitoring and further application in understanding biogeochemical process of Sb.",
author = "Wen Fang and Xinyao Shi and Danxing Yang and Xuan Hu and Williams, {Paul N.} and Bingqing Shi and Zhaodong Liu and Jun Luo",
year = "2020",
month = "1",
day = "9",
doi = "10.1021/acs.analchem.9b04225",
language = "English",
journal = "Analytical Chemistry",
issn = "0003-2700",
publisher = "American Chemical Society",

}

In situ selective measurement based on Diffusive Gradients in Thin-Films technique with mercapto-functionalized mesoporous silica for high-resolution imaging of SbIII in soil. / Fang, Wen; Shi, Xinyao; Yang, Danxing ; Hu, Xuan ; Williams, Paul N.; Shi, Bingqing ; Liu, Zhaodong; Luo , Jun .

In: Analytical Chemistry, 09.01.2020.

Research output: Contribution to journalArticle

TY - JOUR

T1 - In situ selective measurement based on Diffusive Gradients in Thin-Films technique with mercapto-functionalized mesoporous silica for high-resolution imaging of SbIII in soil

AU - Fang, Wen

AU - Shi, Xinyao

AU - Yang, Danxing

AU - Hu, Xuan

AU - Williams, Paul N.

AU - Shi, Bingqing

AU - Liu, Zhaodong

AU - Luo , Jun

PY - 2020/1/9

Y1 - 2020/1/9

N2 - In situ monitoring of Sb speciation improves the understanding of Sb biogeochemistry and toxicity in ecosystems. Precise measurement of Sb is a challenge due to its instability of oxidation and ultra-trace concentration. The development of simple and reliable methods specific to SbIII measurement is not only appealing but essential for implementing regulations. Here, we present an in situ speciation analysis method for SbIII, using the diffusive gradients in thin films (DGT) technique, combined with mercapto functionalized SBA-15 mesoporous silica nanoparticles (MSBA). Laboratory performance tests confirmed MSBA–DGT uptake was independent of pH (4–9) and ionic strength (0.1–200 mmol L–1). DGT devices equipped with MSBA-based binding gels showed a theoretically linear accumulation of SbIII and exhibited high capacity for SbIII at 65 μg per gel disc, with negligible accumulation of SbV over a 72 h deployment. Compared with commercial 3-Mercaptopropyl functionalized silica (MFS), the nano-sized MSBA facilitate its even distribution in the binding gels. Furthermore, the good selectivity and high homogeneity of the MSBA gel enabled it to be applied in a rice rhizosphere in conjunction with AgI gel to investigate the effects of sulfur application on the SbIII solubility. In summary, the newly developed MSBA–DGT provides a selective measurement of SbIII, showing potential for environmental monitoring and further application in understanding biogeochemical process of Sb.

AB - In situ monitoring of Sb speciation improves the understanding of Sb biogeochemistry and toxicity in ecosystems. Precise measurement of Sb is a challenge due to its instability of oxidation and ultra-trace concentration. The development of simple and reliable methods specific to SbIII measurement is not only appealing but essential for implementing regulations. Here, we present an in situ speciation analysis method for SbIII, using the diffusive gradients in thin films (DGT) technique, combined with mercapto functionalized SBA-15 mesoporous silica nanoparticles (MSBA). Laboratory performance tests confirmed MSBA–DGT uptake was independent of pH (4–9) and ionic strength (0.1–200 mmol L–1). DGT devices equipped with MSBA-based binding gels showed a theoretically linear accumulation of SbIII and exhibited high capacity for SbIII at 65 μg per gel disc, with negligible accumulation of SbV over a 72 h deployment. Compared with commercial 3-Mercaptopropyl functionalized silica (MFS), the nano-sized MSBA facilitate its even distribution in the binding gels. Furthermore, the good selectivity and high homogeneity of the MSBA gel enabled it to be applied in a rice rhizosphere in conjunction with AgI gel to investigate the effects of sulfur application on the SbIII solubility. In summary, the newly developed MSBA–DGT provides a selective measurement of SbIII, showing potential for environmental monitoring and further application in understanding biogeochemical process of Sb.

U2 - 10.1021/acs.analchem.9b04225

DO - 10.1021/acs.analchem.9b04225

M3 - Article

JO - Analytical Chemistry

JF - Analytical Chemistry

SN - 0003-2700

ER -