Calibration of ceramic passive samplers for the analysis of chlorophenoxy pesticides and their metabolites in landfill leachate water
Ceramic passive samplers (CPS) are a novel tool for up-concentrating pollutants from water. They are diffusion-controlled samplers consisting of ceramic cylinder filled with a sorbent of choice. We wanted to test these CPS for analysis of chlorophenoxy compounds (pesticides and metabolites) from gro...
| Autores: | , , , , |
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| Formato: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2025 |
| País: | España |
| Recursos: | Consejo Superior de Investigaciones Científicas (CSIC) |
| Repositorio: | DIGITAL.CSIC. Repositorio Institucional del CSIC |
| OAI Identifier: | oai:digital.csic.es:10261/411327 |
| Acesso em linha: | http://hdl.handle.net/10261/411327 https://api.elsevier.com/content/abstract/scopus_id/105024736377 |
| Access Level: | acceso abierto |
| Palavra-chave: | Sorbent Dichlorprop Groundwater Mecoprop Monitoring http://metadata.un.org/sdg/3 http://metadata.un.org/sdg/12 http://metadata.un.org/sdg/9 http://metadata.un.org/sdg/11 http://metadata.un.org/sdg/6 Ensure healthy lives and promote well-being for all at all ages Ensure availability and sustainable management of water and sanitation for all Build resilient infrastructure, promote inclusive and sustainable industrialization and foster innovation Make cities and human settlements inclusive, safe, resilient and sustainable Ensure sustainable consumption and production patterns |
| Resumo: | Ceramic passive samplers (CPS) are a novel tool for up-concentrating pollutants from water. They are diffusion-controlled samplers consisting of ceramic cylinder filled with a sorbent of choice. We wanted to test these CPS for analysis of chlorophenoxy compounds (pesticides and metabolites) from groundwater contaminated by a landfill. To enable this, CPS have to be validated to determine the uptake of contaminants, the diffusivity and sampling rates. As expected, the calibration experiments yielded compound-specific diffusivity rates, which ranged from 0.48 to 4.2 × 10^-6 cm2/s and the sampling rates from 1.17 to 2.47 mL/day. This method showed strong linearity (deployment time vs concentration) with R2 ranging from 0.92 to 0.98 at an accumulation period of 19 days resulting in a considerable up-concentration. Thus, the limits of quantification decreased from 0.030 μg/L to 3.0 μg/L (50 μL direct injection with liquid-chromatography coupled to mass spectrometry) to 0.001 μg/L to 0.113 μg/L for the CPS based method. However, an industry standard method with a newer HPLC-MS/MS instrument provided LOQs of 0.00025-0.006 μg/L based on direct injections. A comparative field study was conducted at a water treatment facility and demonstrated comparable performance between CPS and conventional grab sampling. Cost assessment of direct injection and CPS show economic advantages and disadvantages of each procedure. |
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