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<p>This study presents a&#xa0;tube passive sampler (TPS) for integrative monitoring at various stages of the urban water cycle. The device enables the determination of time-integrated average concentrations in pressurized systems. To achieve this, the sampler is operated via a&#xa0;bypass of the water stream, allowing for a&#xa0;load-based <i>in situ</i> calibration through a&#xa0;mass flow controller. In monitoring campaigns downstream of a&#xa0;wastewater treatment plant, it was possible to quantify not only substances with constant concentrations such as metoprolol and diclofenac, but also highly fluctuating industrial chemicals such as benzotriazole and tolyltriazole. In particular, the tube passive sampler allowed us to retroactively detect sporadic and isolated occurrences of dichlorprop in the wastewater effluent. Using weak anion exchange disks in the tube passive sampler, substance-specific <i>in situ</i> calibrations for 13&#xa0;perfluoroalkyl and polyfluoroalkyl substances (PFAS) were carried out in five consecutive experiments at a&#xa0;drinking water treatment plant (not operated by Berliner Wasserbetriebe). Subsequently, time-weighted average values in a&#xa0;concentration range of 0.5&#xa0;to 439 ng/l could be determined, which were comparable to parallel mixed water samples over the same period. Due to the accumulation of material on the passive sampler, it was also possible to determine a&#xa0;semi-quantitative average concentration of PFNA, even though the concentration in individual water samples was below the limit of quantification.</p>

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Rohrpassivsammler – Eine innovative Messeinrichtung zur zeitintegrativen Überwachung anthropogener Wasserinhaltsstoffe im teilgeschlossenen Wasserkreislauf

  • 期刊论文

  • 发表日期：

    2025年12月12日

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  • Jörg-Helge Hein,
  • Tobias Hensel,
  • Frederik Zietzschmann

摘要

This study presents a tube passive sampler (TPS) for integrative monitoring at various stages of the urban water cycle. The device enables the determination of time-integrated average concentrations in pressurized systems. To achieve this, the sampler is operated via a bypass of the water stream, allowing for a load-based in situ calibration through a mass flow controller. In monitoring campaigns downstream of a wastewater treatment plant, it was possible to quantify not only substances with constant concentrations such as metoprolol and diclofenac, but also highly fluctuating industrial chemicals such as benzotriazole and tolyltriazole. In particular, the tube passive sampler allowed us to retroactively detect sporadic and isolated occurrences of dichlorprop in the wastewater effluent. Using weak anion exchange disks in the tube passive sampler, substance-specific in situ calibrations for 13 perfluoroalkyl and polyfluoroalkyl substances (PFAS) were carried out in five consecutive experiments at a drinking water treatment plant (not operated by Berliner Wasserbetriebe). Subsequently, time-weighted average values in a concentration range of 0.5 to 439 ng/l could be determined, which were comparable to parallel mixed water samples over the same period. Due to the accumulation of material on the passive sampler, it was also possible to determine a semi-quantitative average concentration of PFNA, even though the concentration in individual water samples was below the limit of quantification.