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PubMed Publications| Keyword search (4,164 papers available) |  |
"SAM" Keyword-tagged Publications:
| Title: | Development of an evaporation-driven sampling system for the in situ long-term monitoring of heavy metals in surface water | ||||
| Authors: | Li X, Ma H, Shi S, Tian X, Nie L, Han X, Sun J, Chen Z, Li J, Chen K | ||||
| Link: | https://pubmed.ncbi.nlm.nih.gov/41886856/ | ||||
| DOI: | 10.1016/j.jhazmat.2026.141863 | ||||
| Publication: | Journal of hazardous materials | ||||
| Keywords: | Evaporation-Driven Sampler; Heavy Metals; Time-Weighted Average Concentration; Water Contaminants; | ||||
| PMID: | 41886856 | Category: | Date Added: | 2026-03-27 | |
| Dept Affiliation: |
ENCS
1 Key Laboratory of Resources Conversion and Pollution Control of the State Ethnic Affairs Commission, College of Resources and Environment, South-Central MinZu University, Wuhan 430074, PR China. 2 Key Laboratory of Catalysis and Energy Materials Chemistry of Ministry of Education & Hubei Key Laboratory of Catalysis and Materials Science, School of Chemistry and Materials Science, South-Central MinZu University, Wuhan 430074, PR China. 3 Department of Building, Civil, and Environmental Engineering, Concordia University, Montreal H3G1M8, Canada. 4 Shenzhen Key Laboratory of Environmental Chemistry and Ecological Remediation, College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen 518060, PR China. 5 Key Laboratory of Resources Conversion and Pollution Control of the State Ethnic Affairs Commission, College of Resources and Environment, South-Central MinZu University, Wuhan 430074, PR China; Department of Building, Civil, and Environmental Engineering, Concordia University, Montreal H3G1M8, Canada. Electronic address: kechen@mail.scuec.edu.cn. |
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Description: |
Non-electrically driven samplers, commonly known as passive samplers, are widely used in surface water monitoring to determine the Time-Weighted Average Concentration (CTWA) of contaminants. In this study, we developed an evaporation-driven sampling system and methodology, comprising an Evaporation-Driven Sampler (EDS) for sampling and its standard version (Std-EDS) for measuring the sampling rate (RS). The EDS consists of a filter, tubes, a SPE-like (Solid Phase Extraction) device, a central pipe, towels, and floats. Sampling in this system is driven by the continuous evaporation from the towels. The Std-EDS incorporates the same key structure as the EDS, enabling the RS to be measured through straightforward weight change. In a 14-day experiment, the device demonstrated an RS of 281 mL/d, which is about tenfold higher than that of the Diffusive Gradients in Thin films (DGT) method. RS can be easily adjusted, from tens to hundreds of mL per day by varying the area of towels, highlighting the system's versatility and broad applicability to environmental condition. Additionally, RS is dominantly controlled by ambient evaporation, as confirmed by a strong linear correlation (R2 = 0.98, n = 30). This establishes evaporation as the key environmental factor governing the sampling process. Field validation confirmed that the EDS/Std-EDS accurately tracked heavy metal concentrations in surface water, yielding an average recovery of 70.7%. Further study demonstrated stability and performance comparable to grab sampling and conventional passive methods like DGT. In summary, the EDS and Std-EDS is a flexible and reliable sampling system, showing potential for environmental monitoring. |
