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Distribution, Chemical Speciation, and Risk Assessment of Potentially Toxic Elements in Surface Sediments of the Bohai Sea Oil–Gas Fields.

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Title: Distribution, Chemical Speciation, and Risk Assessment of Potentially Toxic Elements in Surface Sediments of the Bohai Sea Oil–Gas Fields.
Authors: Li, Jiaqing1 (AUTHOR), Yang, Wenchao2 (AUTHOR), Wang, Zhaowei1 (AUTHOR) wzw1128@dlmu.edu.cn, Liu, Weiqi1 (AUTHOR), Jia, Hongliang1 (AUTHOR), You, Zaijin1 (AUTHOR)
Source: Water, Air & Soil Pollution. May2026, Vol. 237 Issue 9, p1-15. 15p.
Subject Terms: *Chemical speciation, *Risk assessment, *Marine sediments, *Environmental risk, *Heavy metals, *Oil fields, *Ocean
Geographic Terms: Bo Hai (China)
Abstract: Comprehensive studies of potentially toxic elements in the sediments of marine oil–gas fields remain limited, hindering a full understanding of their environmental risks and sources. This study conducted an integrated investigation into the concentrations, chemical speciation, ecological risks, and sources of Zn, Pb, Ni, As, Cu, and Cd in surface sediments of the Bohai Sea oil–gas fields during 2019–2020. The results indicated an overall decrease in total concentrations by 2020. Critically, while the geo-accumulation index indicated only localized Cd pollution, BCR sequential extraction revealed its exceptionally high acid-soluble fraction (46.52%), signifying extreme bioavailability. The risk assessment code confirmed Cd as the highest-risk element. Principal component analysis identified three potential sources: petroleum-related activities (Cu, Ni, Zn), equipment corrosion (Cd, Pb), and an independent source (As). This grouping was strongly supported by the cluster patterns obtained from HCA. This work provides critical insights for ecological risk assessment and pollution source management in oil–gas fields, offering an important case for understanding elemental behavior in such industrial marine environments. [ABSTRACT FROM AUTHOR]
Database: Energy & Power Source
FullText Text:
  Availability: 0
Header DbId: enr
DbLabel: Energy & Power Source
An: 192431614
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
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  Label: Title
  Group: Ti
  Data: Distribution, Chemical Speciation, and Risk Assessment of Potentially Toxic Elements in Surface Sediments of the Bohai Sea Oil–Gas Fields.
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  Data: <searchLink fieldCode="JN" term="%22Water%2C+Air+%26+Soil+Pollution%22">Water, Air & Soil Pollution</searchLink>. May2026, Vol. 237 Issue 9, p1-15. 15p.
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  Data: *<searchLink fieldCode="DE" term="%22Chemical+speciation%22">Chemical speciation</searchLink><br />*<searchLink fieldCode="DE" term="%22Risk+assessment%22">Risk assessment</searchLink><br />*<searchLink fieldCode="DE" term="%22Marine+sediments%22">Marine sediments</searchLink><br />*<searchLink fieldCode="DE" term="%22Environmental+risk%22">Environmental risk</searchLink><br />*<searchLink fieldCode="DE" term="%22Heavy+metals%22">Heavy metals</searchLink><br />*<searchLink fieldCode="DE" term="%22Oil+fields%22">Oil fields</searchLink><br />*<searchLink fieldCode="DE" term="%22Ocean%22">Ocean</searchLink>
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  Data: <searchLink fieldCode="DE" term="%22Bo+Hai+%28China%29%22">Bo Hai (China)</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Comprehensive studies of potentially toxic elements in the sediments of marine oil–gas fields remain limited, hindering a full understanding of their environmental risks and sources. This study conducted an integrated investigation into the concentrations, chemical speciation, ecological risks, and sources of Zn, Pb, Ni, As, Cu, and Cd in surface sediments of the Bohai Sea oil–gas fields during 2019–2020. The results indicated an overall decrease in total concentrations by 2020. Critically, while the geo-accumulation index indicated only localized Cd pollution, BCR sequential extraction revealed its exceptionally high acid-soluble fraction (46.52%), signifying extreme bioavailability. The risk assessment code confirmed Cd as the highest-risk element. Principal component analysis identified three potential sources: petroleum-related activities (Cu, Ni, Zn), equipment corrosion (Cd, Pb), and an independent source (As). This grouping was strongly supported by the cluster patterns obtained from HCA. This work provides critical insights for ecological risk assessment and pollution source management in oil–gas fields, offering an important case for understanding elemental behavior in such industrial marine environments. [ABSTRACT FROM AUTHOR]
PLink https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=enr&AN=192431614
RecordInfo BibRecord:
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      – Type: doi
        Value: 10.1007/s11270-026-09256-z
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      – Code: eng
        Text: English
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        PageCount: 15
        StartPage: 1
    Subjects:
      – SubjectFull: Chemical speciation
        Type: general
      – SubjectFull: Risk assessment
        Type: general
      – SubjectFull: Marine sediments
        Type: general
      – SubjectFull: Environmental risk
        Type: general
      – SubjectFull: Heavy metals
        Type: general
      – SubjectFull: Oil fields
        Type: general
      – SubjectFull: Ocean
        Type: general
      – SubjectFull: Bo Hai (China)
        Type: general
    Titles:
      – TitleFull: Distribution, Chemical Speciation, and Risk Assessment of Potentially Toxic Elements in Surface Sediments of the Bohai Sea Oil–Gas Fields.
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          Name:
            NameFull: Li, Jiaqing
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            NameFull: Yang, Wenchao
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            NameFull: Wang, Zhaowei
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            NameFull: Liu, Weiqi
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            NameFull: Jia, Hongliang
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            – D: 01
              M: 05
              Text: May2026
              Type: published
              Y: 2026
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              Value: 237
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              Value: 9
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            – TitleFull: Water, Air & Soil Pollution
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