A global meta-analysis of toxic metals in continental surface water bodies

Kumar, Amit; Kumar, Vinod; Pandita, Shevita; Singh, Sumit; Bhardwaj, Renu; Varol, Memet; Rodrigo‐Comino, Jesús

doi:10.1016/j.jece.2023.109964

Cited by 36 publications

(8 citation statements)

References 96 publications

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“…The concentrations of Hg on all continents often exceed the limits allowed by the WHO. It has been already found that a great part of water bodies in the world are highly polluted by toxic metals with a remarkable impact on the health of people [40]. Indeed, in recent studies, in Asia and South America Hg concentrations were above WHO guidelines in drinking water [40].…”

Section: Vulnerability Factorsmentioning

confidence: 99%

“…It has been already found that a great part of water bodies in the world are highly polluted by toxic metals with a remarkable impact on the health of people [40]. Indeed, in recent studies, in Asia and South America Hg concentrations were above WHO guidelines in drinking water [40]. Furthermore, the surface waters of many African basins are heavily polluted due to the exploitation of mineral resources.…”

Section: Vulnerability Factorsmentioning

confidence: 99%

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ASGM Mercury Discharges in Tropical Basins: Assessment of the Criticality of Their Geographical Distribution

Bruno,

De Simone

2024

Sustainability

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The global-scale impacts of mercury discharged from Artisanal Small-scale Gold Mining (ASGM) on soils have been poorly studied, unlike atmospheric emissions. This is a key point to understand the potential exposure to mercury pollution of ecosystems and populations living in the river basins where ASGM is practiced, since the largest fraction of the pollutant is poured into soil, independently of the amalgamation technique employed. ASGM activities emit into the atmosphere mercury in its elemental form, which reacts very slowly with the major oxidants. Therefore, the exact location of the ASGM sites has a limited impact on the atmospheric mercury fate. Conversely, this cannot be applied to the mercury discharged on top of the soil. Two ASGM inventories and the related distributions available in the literature along with two novel distributions based on the intersection of zones characterized by low population density and rural areas were compared using a newly introduced Vulnerability Index. The results from this comparison showed that a precise distribution of ASGM is crucial to effectively evaluate the fate of mercury, and therefore the resulting effects on the local ecosystems.

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Section: Vulnerability Factorsmentioning

confidence: 99%

Section: Vulnerability Factorsmentioning

confidence: 99%

ASGM Mercury Discharges in Tropical Basins: Assessment of the Criticality of Their Geographical Distribution

Bruno,

De Simone

2024

Sustainability

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“…Conventionally, the accumulation of heavy metals in tap water can be attributed to the atmospheric deposition, wastewater discharge, or even seepage of external groundwater into the water supply system [53,54]. In addition, significant levels of contaminants may also be extracted from materials in water supply pipelines due to water bodies coming into contact with them.…”

Section: Potential Contamination Of Heavy Metals From Water Supply Pi...mentioning

confidence: 99%

Determination of Heavy Metals and Health Risk Assessment in Tap Water from Wuhan, China, a City with Multiple Drinking Water Sources

Liu,

Tao,

Sun

et al. 2023

Water

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The health issues of urban tap water are of great concern in the context of sustainability challenges to the environmental quality of water and the security of the water supply. In this work, tap water from the main urban areas in Wuhan and surface water from the Yangtze River and the Hanjiang River were collected during summer (June) and winter (December), 2022. The concentrations of 10 heavy metals including Fe, Al, Mn, Co, Ni, Cu, Se, Cd, Cr and Pb were determined for water quality evaluation and health risk assessment. The results demonstrated that almost all of the tap water samples contained metal concentrations below the Chinese national standard limits for drinking water (GB 5749-2022). The risk of heavy metals in tap water to human health was evaluated, and the results showed that the total carcinogenic risk (TCR) was in the range of 10−6 and 10−4 and the hazard index (HI) was much lower than one in both summer and winter. The current tap water in Wuhan is generally in a relatively safe state and will not cause acute hazards or chronic diseases in the short term, but the long-term cancer risk is still noteworthy. The heavy metal pollution index (HPI) showed that the overall water quality of urban drinking water sources in Wuhan has been satisfactory, despite its slightly polluted state in winter. Pipeline corrosion was considered as one of the important sources of heavy metals in Wuhan tap water, which can explain, to a certain extent, the increase in the heavy metal concentrations of tap water outlets relative to the finished water reported by waterworks, such as Fe, Ni, Cd and Pb. This study has implications for the formulation of better urban water supply security management strategies and associated sustainability challenges.

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“…This is associated with sedimentation and sorption processes. As a result, water quality is improved, but at the same time, the content of heavy metals in bottom sediments increases [4,[25][26][27][28]. Environmental conditions, such as pH, electrical conductivity, and oxidation reduction potential change, result in heavy metals re-entering the water, resulting in secondary water pollution.…”

Section: Introductionmentioning

confidence: 99%

Pollution Assessment and Spatial Distribution of Heavy Metals in Surface Waters and Bottom Sediments of the Krzna River (Poland)

Kluska,

Jabłońska

2024

Water

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Due to their toxicity, lack of bioaccumulation and biodegradability, and ease of binding to sediments, heavy metals are considered the main pollutants of rivers. It is, therefore, necessary to control and monitor these pollutants. The present study analyzed the Krzna River, which flows in southeastern Poland and has an outlet to the Bug River. Over much of its length, the Bug River forms Poland’s border with Belarus, while its origin is in Ukraine. The main purpose of the conducted research was a qualitative and quantitative analysis of selected heavy metals, i.e., Ni, Pb, Zn, Cd, and Cu, in bottom sediments and surface waters of the Krzna River. The secondary objectives were to evaluate the level of contamination of the studied matrices and identify the sources of pollution. Eighty samples of water and bottom sediments from the Krzna River were collected for the analysis. Due to the varying distribution of metals under the influence of changes in temperature, precipitation, and humidity, the samples were collected in May and August 2023. The average cadmium content in the sediments studied was the same in both May and August, at 0.6 mg/kg. In contrast, the nickel content of the sediments ranged from 4.6 to 6.1 mg/kg in May and from 4.8 to 6.8 in August. Only nickel and cadmium of the five heavy metals tested were present in amounts exceeding the geochemical background value. Analysis of the results indicates that only a minimal amount of heavy metals remain dissolved in the surface waters, and the remainder contaminates the sediments. The average concentrations of metals in the studied bottom sediments and surface waters were as follows: zinc > lead > nickel > copper > cadmium. The content of metals in the studied sediments was not high, but at the same time, their presence above the geochemical background indicates anthropogenic human activity. Any changes in hydrodynamic conditions and various environmental factors may result in the re-release of heavy metals contained in sediments into surface waters.

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A global meta-analysis of toxic metals in continental surface water bodies

Cited by 36 publications

References 96 publications

ASGM Mercury Discharges in Tropical Basins: Assessment of the Criticality of Their Geographical Distribution

ASGM Mercury Discharges in Tropical Basins: Assessment of the Criticality of Their Geographical Distribution

Determination of Heavy Metals and Health Risk Assessment in Tap Water from Wuhan, China, a City with Multiple Drinking Water Sources

Pollution Assessment and Spatial Distribution of Heavy Metals in Surface Waters and Bottom Sediments of the Krzna River (Poland)

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