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<p>Thisvestigates the anthropogenic footprint on a coastal marine environment near the Istrian coast (Northern Adriatic Sea) through a scientific diving field campaign conducted in September 2025. The investigation aimed to evaluate local seawater quality by combining onsite hydrochemical measurements with targeted analyses of trace metal elements (TME) and linear alkylbenzene sulfonates (LAS) as indicators of maritime and touristic activities. Ambient hydrochemical parameters (pH: 8.06 ± 0.07, absolute salinity 39.3 ± 0.5&#xa0;g/kg, redox potential 441.5 ± 21.5&#xa0;mV) were found to be stable and typical for Adriatic seawater. Principal component analysis (PCA) of TME data revealed two distinct element groups: a geogenic/corrosive Fe–Mn–Ni cluster related to local lithology and an Al-Cd–Cu–Zn group related to maritime activities. LAS analyses revealed a severe localized hotspot at a submarine sewage effluent (≈1469.3&#xa0;ppb), alongside a consistent low-level background signal across all other sites (≈&#xa0;5&#xa0;ppb). A methodological evaluation highlighted the robustness of the overall sampling and analytical setup, with specific recommendations for future expeditions.</p>

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Assessment of anthropogenic trace metal and surfactant influence on a coastal area in the Northern Adriatic Sea using scientific diving

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年8月1日

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  • Eric Franke,
  • Nia Franke,
  • Christine Viehweger,
  • Carla Vogt

摘要

Thisvestigates the anthropogenic footprint on a coastal marine environment near the Istrian coast (Northern Adriatic Sea) through a scientific diving field campaign conducted in September 2025. The investigation aimed to evaluate local seawater quality by combining onsite hydrochemical measurements with targeted analyses of trace metal elements (TME) and linear alkylbenzene sulfonates (LAS) as indicators of maritime and touristic activities. Ambient hydrochemical parameters (pH: 8.06 ± 0.07, absolute salinity 39.3 ± 0.5 g/kg, redox potential 441.5 ± 21.5 mV) were found to be stable and typical for Adriatic seawater. Principal component analysis (PCA) of TME data revealed two distinct element groups: a geogenic/corrosive Fe–Mn–Ni cluster related to local lithology and an Al-Cd–Cu–Zn group related to maritime activities. LAS analyses revealed a severe localized hotspot at a submarine sewage effluent (≈1469.3 ppb), alongside a consistent low-level background signal across all other sites (≈ 5 ppb). A methodological evaluation highlighted the robustness of the overall sampling and analytical setup, with specific recommendations for future expeditions.