A review on the occurrences of persistent organic pollutants in corals, sediments, fish and waters of the Western Indian Ocean

Miraji, Hossein; Ripanda, Asha; Moto, Edward Angelo

doi:10.1016/j.ejar.2021.08.003

Cited by 26 publications

(6 citation statements)

References 38 publications

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“…PCBs in the waterbody can have an impact on ecosystems, human health, and water quality [52]. Thus, it is crucial to assess the possible ecological impact of PCBs in this region because of their toxicity and bioaccumulation properties, as well as the broad ecological value of the Beiluo River Basin [53]. Since China has not yet set environmental quality guidelines for PCBs, we contrast our results with those suggested by other countries and/or international organizations.…”

Section: Ecological Risk Assessmentmentioning

confidence: 84%

Occurrence, Potential Risk Assessment, and Source Apportionment of Polychlorinated Biphenyls in Water from Beiluo River

Wang

Yan

Chang

et al. 2023

Water

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Polychlorinated biphenyls (PCBs) are highly hazardous, persistent, and bioaccumulative substances that pose a threat to water quality in a number of locations, including the Beiluo River in Shaanxi Province, China. However, little is known about the contribution of PCBs to the Beiluo River. In this study, in order to look into the impact of sources on the water of the Beiluo River, the discovered PCB congeners in water were examined on a regional scale. The concentration of PCBs in water across Beiluo River was in the range from 0.065 to 1.92 ng L−1, and the average concentration was 0.37 ng L−1. The main PCB sources in the Beiluo River waterbody were found using positive matrix factorization (PMF). Source apportionment results indicated that the PCB pollution of the Beiluo River was mostly caused by industrial emissions, technical PCB mixtures, and coal and wood combustion. According to current ecological risk assessment guidelines, the PCB concentrations found in this study may have a negative impact on biological systems. Overall, the new information about the presence of several PCBs in the water of the Beiluo River justifies the need for urgent management actions, as well as long-term monitoring efforts, to protect ecosystems. Future investigations of these chemicals in China may use the conclusions of this first ecological risk level assessment on the PCB contamination in the waterbody of the Beiluo River as a guide.

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Section: Ecological Risk Assessmentmentioning

confidence: 84%

Occurrence, Potential Risk Assessment, and Source Apportionment of Polychlorinated Biphenyls in Water from Beiluo River

Wang

Yan

Chang

et al. 2023

Water

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“…The first step is to assign the unit weights of each parameter in the water sample and assign Equation (1): (1) where Si = the standard permissible value of i th water quality parameter; K = constant of proportionality which is 1.645. WQI was calculated using the expression in Equation ( 2): (2) where Qi = the quality rating of i th water quality parameter; Wi = the unit weight of the water quality parameter.…”

Section: Water Quality Index (Wqi)mentioning

confidence: 99%

“…Their population can be affected by human activities, environmental pressures, fishing activities, climatic fluctuations, and pollution which may be from zone or non-zone sources [1]. Water is the medium in which fishes live and their sustenance is based on the appropriate quantity and quality which is crucial for their survival [2]  [3]. Fishes are very sensitive to changes in the aquatic medium and the quality of such waters dictates the physiological responses of the fishes [4].…”

Section: Introductionmentioning

confidence: 99%

Owalla Reservoir in South-western Nigeria: Assessment of Fish Distribution, Biological Diversity, and Water Quality Index

Iyiola,

Izah,

Morya

et al. 2023

Indonesian J. Agric. Res

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The Water Quality Index (WQI) was used to evaluate the ecological health and status of Owalla Reservoir and the implications on fish species distribution and biological diversity of the reservoir. Water quality and fish species were collected from three sampling zones (A, B, and C) from September 2019 to August 2020 and biological diversity indices such as dominance, Shannon-Weiner, Evenness, Brillouin, Menhinick, Margalef, Equitability, and Fishers index were calculated. The mean values measured for the temperature (25.9 ± 0.48 oC), dissolved oxygen (4.14 ± 0.10 mg/L), pH (7.0 ± 0.01), and nitrate (0.68 ± 0.25 mg/L) of Owalla Reservoir were within the recommended range; while ammonia (0.13 ± 0.20 mg/L), nitrite (0.14 ± 0.21 mg/L) were high and above the recommended limits. The WQI was highest in zone A (155.97) with an overall index value of 152.73 for the reservoir. Zone A recorded the highest relative fish abundance (49.95%) and was more diversified than other sampling zones. In terms of fish biodiversity indices, zone A had the highest richness (9), number of individuals (136), Shannon (1.84), and Brillouin (1.62) index values. Zones B and C were highest in terms of Dominance (1.0), and Evenness (1.0). Zones A and C were highest in terms of Simpson (0.83); zone B was highest in terms of Menhinick (1.58), and Fisher_alpha index (3.98) while zone C was highest in terms of Margalef (2.0), and Equitability (0.99) indices. The elevated levels of WQI, ammonia, and nitrite pose a danger to fish species and watershed systems. It is important to maintain the quality of water within Owalla Reservoir by ensuring best human practices and averting inappropriate human wastes as well as sewage disposal and agricultural activities. These should be checked for the sustainability of fish species.

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“…It was observed that contamination increased over the 16 years, reaching alarming levels-perhaps due to increased population and anthropogenic activities [76]. Reports of the presence of quantifiable levels of persistent halogenated compounds-such as pentabromotoluene and hexachlorobenzene-are available [77,78], indicating pollution.…”

Section: Madagascarmentioning

confidence: 99%

A Review on Contaminants of Emerging Concern in the Environment: A Focus on Active Chemicals in Sub-Saharan Africa

et al. 2021

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Active chemicals are among the contaminants of emerging concern that are rarely covered in regulatory documents in sub-Saharan Africa. These substances are neither in the list of routinely monitored substances nor in the guidelines for routine environmental monitoring activities. This has been of concern to public health officials, toxicologists, communities, and governments, hence the need for risk assessment and regulation of these substances. In this review article, the presence of active chemicals in the sub-Saharan African environment was investigated. The results indicate the availability of few studies in some countries, while in other countries no reports of active chemicals were found, hence the need for further research targeting such countries. It was further observed that mixtures of active chemicals from different therapeutic categories—such as antibiotics and analgesics—were reported. The natural environment is increasingly at risk due to the presence of these substances, their metabolites, and their transformation byproducts. These substances are characterized by persistence as a result of their non-biodegradable nature; hence, they circulate from one environmental compartment to another through the food chain, causing harm along the way. Most studies that evaluated the toxicity of these substances considered the effects of a single drug, but observations indicated the presence of drug mixtures, hence the need for further evaluation of the effects of drug–drug interactions—including synergistic and additive effects—for environmental sustainability. The presence of ACs in several environmental compartments at quantifiable quantities was discovered in this investigation, indicating the potential for ecosystem injury as a result of bioaccumulation, bioconcentration, and biomagnification through the food chain. This necessitates further research on the subject in order to ensure a healthier environment.

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A review on the occurrences of persistent organic pollutants in corals, sediments, fish and waters of the Western Indian Ocean

Cited by 26 publications

References 38 publications

Occurrence, Potential Risk Assessment, and Source Apportionment of Polychlorinated Biphenyls in Water from Beiluo River

Occurrence, Potential Risk Assessment, and Source Apportionment of Polychlorinated Biphenyls in Water from Beiluo River

Owalla Reservoir in South-western Nigeria: Assessment of Fish Distribution, Biological Diversity, and Water Quality Index

A Review on Contaminants of Emerging Concern in the Environment: A Focus on Active Chemicals in Sub-Saharan Africa

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