Theodoros Giakoumis

Dr. Theodoros Giakoumis

orcid

Research Focus & Metrics

Academic Career Length

6Years (2021-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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16 November 2021 in Science of The Total Environment
Verified
Journal Article
Closed access
PSP.S. Seethalakshmi
P.S. Seethalakshmi
OCOliver J. Charity
Oliver J. Charity
TGTheodoros Giakoumis
Theodoros Giakoumis
GKGeorge Seghal Kiran
George Seghal Kiran
SSShiranee Sriskandan
Shiranee Sriskandan
JSJoseph Selvin
Joseph Selvin

15 April 2026 in Science of The Total Environment
Verified
Journal Article
Open access
AHAna García Herrera
Ana García Herrera
EIEleni Iacovidou
Eleni Iacovidou
TGTheodoros Giakoumis
Theodoros Giakoumis
Per- and polyfluoroalkyl substances (PFAS) contamination has emerged as a major international environmental and regulatory challenge, with PFAS increasingly detected across freshwater systems worldwide. However, in countries with limited PFAS manufacturing, such as England, it remains unclear whether surface waterbodies contamination reflects diffuse consumer-driven pollution, sectoral pressures, or dominant point-source pathways of PFAS pollution, such as Wastewater Treatment Works (WWTWs). In this study, we address this gap by providing the first surface-waterbody-level characterisation of PFAS contamination across England, drawing on the Environment Agency 's 2024 national dataset. Linking PFAS detections with sectoral pressure classifications, the study makes the following contributions: 1) quantifies the associations between individual compounds and human activities, 2) assesses WWTWs as pathways for PFAS release, and 3) maps detected PFAS to sector-specific product applications. Our analysis reveals that 92% of monitored waterbodies contain at least one of thirty-four detected PFAS, with multiple compounds co-occurring (mean ∼ 6.5) and PFOS frequently exceeding its Environmental Quality Standard. Water Industry/Domestic/General Public pressures showed strong positive associations with 11 PFAS compounds, with effect sizes of 2.9-9.9 (FDR < 0.05). After adjusting for overlapping sectoral influences, significant positive associations remained for PFHxS.L, PFBS, PFHpA, PFOS..B, PFOS..L and PFOS_combined, with odds ratios between 2.0 and 3.0 (FDR < 0.05). PFAS were also routinely present in WWTWs effluents, where removal efficiencies were often low or negative, indicating that WWTWs function as chronic point sources. Persistent PFOS detections in WWTWs effluents long after its restriction reflect that PFAS are now deeply embedded within the built environment, recirculating through the urban water cycle. These findings underscore the necessity for a comprehensive, system-level governance approach for PFAS that transcends single-compound restrictions and advocates for a fair allocation of mitigation responsibilities.

13 May 2026 in Science of The Total Environment
Verified
Journal Article
Open access
AHAna García Herrera
Ana García Herrera
EIEleni Iacovidou
Eleni Iacovidou
TGTheodoros Giakoumis
Theodoros Giakoumis