Heavy Metal Contamination and Ecological Risk Assessments in Urban Mangrove Sediments in Zhanjiang Bay, South China

Zhou, Xun; Wang, Yao-Ping; Song, Zhiguang

doi:10.1021/acsomega.2c02516

Cited by 13 publications

(2 citation statements)

References 48 publications

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“…The heavy-metal concentrations in sediment samples can be evaluated using various pollution assessment indicators (Hahladakis et al, 2013;Liu et al, 2018;Zhou et al, 2022). These include the geo-accumulation index (Igeo), which measures the degree of contamination compared with pre-industrial levels; the contamination factor (CF), which quantifies the relative enrichment of metals; the enrichment factor (EF), which assesses the potential harm to living organisms.…”

Section: Pollutions Levelsmentioning

confidence: 99%

“…Furthermore, heavy metals present in sediments and seawater are assimilated by aquatic organisms and subsequently bioaccumulate through the food chain, posing a potential threat to marine ecosystems and human health (Zhou et al, 2022). Heavy metal concentrations in fish and other marine species are indicators of environmental contamination.…”

Section: Introductionmentioning

confidence: 99%

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Impact of heavy metals on aquatic life and human health: a case study of River Ravi Pakistan

Ahamad,

Yao,

Ren

et al. 2024

Front. Mar. Sci.

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Heavy-metal contamination in river and ocean is a critical environmental issue that endangers marine ecosystems and human health. Therefore, conducting extensive research to devise effective mitigation measures is imperative. Sediment samples were taken randomly throughout the study area. Analysis was done to determine the presence of different metals, including arsenic, cadmium, chromium, nickel, copper, zinc, lead, and manganese. The assessment of different pollution levels was done by using various pollution indicators including “geo-accumulation index (Igeo), contamination factor (CF), enrichment factor (EF)” for accuracy. The Igeo measurement for Cd indicated varying pollution, ranging from moderate to significantly polluted, while Mn revealed no contamination. Elements such as Ni, Cr, Cu, and Zn showed a moderate level of contamination. The contamination factor values exhibited a range of 0.436 (Pb) to 7.637 (Cd), with average values spanning from 0.9176 (Mn) to 4.9714 (Cd), suggesting significant regional variation. EF exhibits a pattern of contamination comparable to that of Igeo. The noncarcinogenic risk associated with exposure to Cd and As exceeded the higher limit (HI > 1) for children and adults. Furthermore, the carcinogenic risk presented by pollutants such as copper (Cu), arsenic (As), nickel (Ni), cadmium (Cd), and chromium (Cr) was found to exceed the limits in children. In adults, only arsenic (As) and copper (Cu) were shown to represent a higher risk of cancer than the limit of 10−4. The PCA analysis revealed that two (PCs) accounted for more than 65% of the total variance in the River Ravi, as determined by eigenvalues greater than 1. This study underscores the importance of the ongoing monitoring and management of heavy-metal pollution to ensure sustainable marine ecosystem development and public health protection.

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Section: Pollutions Levelsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Impact of heavy metals on aquatic life and human health: a case study of River Ravi Pakistan

Ahamad,

Yao,

Ren

et al. 2024

Front. Mar. Sci.

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Examining temporal trends in heavy metal levels to analyze sediment pollution dynamics in the Saida urban watershed (N‐W Algeria)

Fatmi,

Hazzab,

Rahmani

et al. 2024

Water Environment Research

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The study focuses on current pollution in the Saïda basin, a semi‐arid region in north‐western Algeria. By analyzing sediments, the study provides interesting results on urban pollution and its environmental impact. The research consists of two main phases, each addressing different aspects of pollution. In the first phase, different pollution indicators are used to analyze heavy metals and organic pollutants in urban drainage sediments. The results are compared with sediment quality guidelines, regulatory thresholds, and local and international references. Most of the metallic contaminants exceed the toxicity levels established by the continental crust and sediment quality guidelines, suggesting an anthropogenic origin. In addition, contamination indices show significant accumulation. In this context, the results highlight the importance of accumulation and transport processes in urban sediments. Hydrological parameters significantly influence heavy metal distribution mechanisms. Remarkable variations between copper (Cu) and lead (Pb) suggest a combined or singular source during transport. Conversely, chromium (Cr), nickel (Ni), and iron (Fe) are mainly derived from natural lithological sources. Cadmium (Cd) is associated with anthropogenic sources related to the agricultural use of phosphate fertilizers, whereas zinc (Zn) is mainly derived from physical corrosion processes. In the second phase, a combined descriptive and multivariate statistical analysis examines the mobility and distribution of heavy metals and their relationships with organic matter (OM) over time. Pronounced temporal variations in Cd, Zn, and Cu concentrations are attributed to human activities. Strong correlations exist between OM and cobalt (Co), Cu and Pb, confirming the ability of OM to adsorb these metals under specific geochemical conditions associated with waste disposal. Conversely, Zn, Cd, Cr, and Ni show weak or negative correlations with OM, suggesting diverse sources, including potential agricultural, industrial, and natural origins. The dendrogram confirms the existence of previously identified contaminant groups, suggesting common sources and potential co‐occurrence patterns. This analysis highlights the role of the drainage network as a physico‐chemical reactor in the mobilization of contaminants. It underlines the importance of sediment interactions in urban pollution processes. Finally, recommendations are proposed to ensure effective pollution control and remediation.Practitioner Points Useful information on pollution and its environmental impact is provided by the analysis of sediments in the urban basin of Saida (NW‐Algeria). The results of this study indicate high levels of heavy metals in the sediments, in excess of toxicity limits, and evidence of anthropogenic sources. Temporal variations in metal concentrations indicate the influence of human activities. The study has made it possible to identify the sources, to understand the mobility and distribution, and to control the contamination by heavy metals in the urban sediments. Drainage system serves as a pathway for dispersing contaminants.

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Cadmium-induced oxidative stress, histopathology, and transcriptomic changes in the hepatopancreas of Fenneropenaeus merguiensis

Ju,

Ndandala,

Lei

et al. 2024

Aquaculture Reports

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Heavy Metal Contamination and Ecological Risk Assessments in Urban Mangrove Sediments in Zhanjiang Bay, South China

Cited by 13 publications

References 48 publications

Impact of heavy metals on aquatic life and human health: a case study of River Ravi Pakistan

Impact of heavy metals on aquatic life and human health: a case study of River Ravi Pakistan

Examining temporal trends in heavy metal levels to analyze sediment pollution dynamics in the Saida urban watershed (N‐W Algeria)

Cadmium-induced oxidative stress, histopathology, and transcriptomic changes in the hepatopancreas of Fenneropenaeus merguiensis

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