A cellulose acetate membrane, positioned in a passive sampler system, was coated with the perfluorinated polymer Nafion. Aqueous metal transport through the membrane and the Nafion film was investigated. The Nafion-coated membrane prevents the transport of metals bound to natural organic material to the receiving phase in the passive sampler, while copper associated with small synthetic ligands pass through the Nafion film. Increasing thickness of the Nafion film decreases the metal uptake rate to the receiving phase in the passive sampler and increases the response time. A decreased response time for the passive sampler would provide a better estimation of rapid changes in concentration, particularly for dynamic aquatic systems such as urban runoff. Limited biofouling protection with the Nafion coating was demonstrated by growth inhibition of natural periphyton communities on glass surfaces.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1039/b210905k | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Land-derived metals impact the survival and settlement of larval mussels.
Environ Pollut
January 2025
Cawthron Institute, 98 Halifax Street East, Nelson, 7010, New Zealand.
Global declines in wild mussel populations and production have been linked to the impacts of climate change and pollution. Summer die-offs of mussels (Perna canaliculus), spat retention issues, and a severe decline in mussel spat settlement have been reported in the Marlborough Sounds, an important area for mussel farming in New Zealand. Preliminary evidence suggests that naturally occurring contaminants and changing land use in the surrounding areas, could contribute to the decline of this species.
View Article and Find Full Text PDFA POCIS-based approach for the monitoring of pharmaceuticals in wastewater treatment plants: Calibration and deployment challenges.
Environ Pollut
January 2025
Department of Analytical and Applied Chemistry, School of Engineering, IQS-Universitat Ramon Llull, Via Augusta 390, 08017 Barcelona, Spain.
Article Synopsis
- The study investigates the use of Polar Organic Chemical Integrative Samplers (POCIS) as a more effective method for monitoring pharmaceutical residues in wastewater compared to traditional grab sampling.
- POCIS allows for continuous sampling over days or weeks, providing more representative data, though challenges remain in obtaining precise quantitative results due to calibration needs.
- The research successfully identifies and calibrates sampling rates for 49 pharmaceuticals in a wastewater treatment plant near Barcelona, yielding high concentrations of specific compounds, thus establishing a methodology for better environmental monitoring of pharmaceuticals.
An Azide-based Passive Sampler for Monitoring Abiotic Reduction of Chlorinated Solvent Contaminants in Groundwater.
Chemosphere
January 2025
Department of Civil and Environmental Engineering, University of Massachusetts Lowell, Massachusetts, United States. Electronic address:
There is significant interest in monitoring abiotic decomposition of chlorinated solvents at contaminated sites due to large uncertainties regarding the rates of abiotic attenuation of trichloroethylene (PCE) and perchloroethylene (PCE) under field conditions. In this study, an innovative passive sampling tool was developed to quantify acetylene, a characteristic product of abiotic reduction of TCE or PCE, in groundwater. The sampling mechanism is based on the highly specific and facile click reaction between acetylene and an azide compound to form a biologically and chemically stable triazole product.
View Article and Find Full Text PDFSystematic Evaluation of Sampling Rate Influences and Variability in POCIS Using Meta-Analysis and Quantitative Structure Property Relationship (QSPR).
Environ Pollut
January 2025
Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
Despite the significant benefits of aquatic passive sampling (low detection limits and time-weighted average concentrations), the use of passive samplers is impeded by uncertainties, particularly concerning the accuracy of sampling rates. This study employed a systematic evaluation approach based on the combination of meta-analysis and quantitative structure-property relationships (QSPR) models to address these issues. A comprehensive meta-analysis based on extensive data from 298 studies on the Polar Organic Chemical Integrative Sampler (POCIS) identified essential configuration parameters, including the receiving phase (type, mass) and the diffusion-limiting membrane (type, thickness, pore size), as key factors influencing uptake kinetic parameters.
View Article and Find Full Text PDFDouble-faced diffusive gradient in thin films sampler (df-DGT): Proposing an improved DGT sampler design for water deployments.
Anal Chim Acta
January 2025
Environmental Studies Center (CEA), São Paulo State University (UNESP), Avenida 24-A, 1515, Rio Claro, SP, 13506-900, Brazil.
Background: The Diffusive Gradients in Thin Films (DGT) technique has become the most widely used passive sampling method for inorganic compounds. This widespread adoption can be partly attributed to the development of new binding phases that facilitate the sampling of numerous analytes. In contrast, to date, the DGT sampler for inorganic compounds has not seen any significant design improvements.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!