Potentially harmful elements contamination in water and sediment: Evaluation for risk assessment and provenance in the northern Sulaiman fold belt, Baluchistan, Pakistan

Ullah, Rahim; Muhammad, Said; Jadoon, Ishtiaq A. K.

doi:10.1016/j.microc.2019.04.053

Cited by 47 publications

(12 citation statements)

References 24 publications

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“…However, the classification of potential ecological risk index is based on 8 pollutants (As, Cd, Cr, Cu, Hg, Pb, PCB (Polychlorinated Biphenyl), Zn). The amount and type of PTEs may affect the assessment standards; thus, the grading criteria of ecological risk are improved ( Table 1 ) [ 40 , 41 ].…”

Section: Methodsmentioning

confidence: 99%

Pollution Distribution of Potentially Toxic Elements in a Karstic River Affected by Manganese Mining in Changyang, Western Hubei, Central China

Liu

Kuang

Lan

et al. 2021

IJERPH

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This study investigated the distribution, pollution level and potential ecological risk of potentially toxic elements (PTEs) from manganese mining in a karstic Danshui River, in Changyang, Western Hubei, Central China. River water and sediments were collected for seven PTEs measurement (As, Cd, Cr, Cu, Mn, Pb and Zn), as well as pH and Eh of the river water were measured. Results showed that the major pollutant was Mn, the river water environment was mainly acidic and oxidizing (288 < Eh, pH < 6.3), and the pollution distribution of Mn in the study area was dominated by the combination of natural processes and anthropogenic activities. In the river water, according to the contamination factor (CF) and pollution load index (IPL) results, Mn was considered the main pollutant. There was low As and Pb pollution downstream as well as Cu pollution upstream. Upstream and downstream areas were the main polluted river sections of the river water samples collected. In river sediments, based on the results of the geo-accumulation index (Igeo) and potential ecological risk index (IPER), it was determined that there was only considerable Mn pollution. The IPER of the PTEs from the river sediments was at acceptable levels, only Mn upstream performed at a moderate ecological risk level. According to Pearson correlation and principal component analysis, Mn originated from manganese mining activities, Cd, Cr and Zn were of natural origin, and Cu may have come from both mining and natural origin, whereas Pb and As were mainly related to the daily activities. Consequently, elemental speciation, mining activities and the distribution of water conservancy facilities were the main impacts of PET pollution distribution in this river.

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Section: Methodsmentioning

confidence: 99%

Pollution Distribution of Potentially Toxic Elements in a Karstic River Affected by Manganese Mining in Changyang, Western Hubei, Central China

Liu

Kuang

Lan

et al. 2021

IJERPH

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“…Iron is considered a potentially harmful element (PHE), which may be indicative of human-mediated contamination. For instance, high Fe concentrations in surficial sediments could be related to inputs of clastic sediments, and often reflect agricultural activities 77 . We determined 13 plant genera, five belonging to the family Poaceae (58%), including the genus Zea (corn), known to have been cultivated and consumed by early settlers 78 , and Oryza , a fast-growing weed that is indicative of human-mediated habitat disturbance.…”

Section: Resultsmentioning

confidence: 99%

Holocene life and microbiome profiling in ancient tropical Lake Chalco, Mexico

Moguel

Pérez

Alcaraz

et al. 2021

Sci Rep

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Metagenomic and traditional paleolimnological approaches are suitable to infer past biological and environmental changes, however, they are often applied independently, especially in tropical regions. We combined both approaches to investigate Holocene Prokaryote and Eukaryote diversity and microbial metabolic pathways in ancient Lake Chalco, Mexico. Here, we report on diversity among a large number of lineages (36,722 OTUs) and functional diversity (27,636,243 non-clustered predicted proteins, and 6,144 annotated protein-family genes). The most abundant domain is Bacteria (81%), followed by Archaea (15%) and Eukarya (3%). We also determined the diversity of protein families and their relationship to metabolic pathways. The early Holocene (> 11,000 cal years BP) lake was characterized by cool, freshwater conditions, which later became warmer and hyposaline (11,000–6,000 cal years BP). We found high abundances of cyanobacteria, and fungi groups associated with mature forests in these sediments. Bacteria and Archaea include mainly anaerobes and extremophiles that are involved in the sulfur, nitrogen, and carbon cycles. We found evidence for early human impacts, including landscape modifications and lake eutrophication, which began ~ 6,000 cal years BP. Subsaline, temperate conditions were inferred for the past 5,000 years. Finally, we found nitrogen-fixing bacteria and protein-family genes that are linked to contaminated environments, as well as several fungal pathogens of crops in near-surface sediments.

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“…Water samples were acidified with HNO3 to pH <2 to minimize microbial growth, precipitation and solubility of PTEs in container walls. While sampling, every bottle was labelled and then were immediately transported to the laboratory and stored at 4 °C for further analyses (Ullah et al 2019).…”

Section: Samples Collectionmentioning

confidence: 99%

“…Oral absorption and dermal contact are known to be the main pathway (over 90%) of human exposure to PTEs (Ullah et al 2019). The chronic and cancer risks associated with the ingestion of PTEs in drinking water sources were analyzed.…”

Section: Health Risk Assessmentmentioning

confidence: 99%

Contamination Level, Source Identification And Health Risk Assessment of Potentially Toxic Elements In Drinking Water Sources of Mining And Non-Mining Areas of Khyber Pakhtunkhwa, Pakistan

Bhatti

Ishtiaq

Khan

et al. 2021

Preprint

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Accelerated mining activities have increased water contamination with potentially toxic elements (PTEs) and their associated human health risk in developing countries. The current study investigated the distribution of PTEs, their potential sources and health risk assessment in both ground and surface water sources in mining and non–mining areas of Khyber Pakhtunkhwa, Pakistan. Water samples (n=150) were taken from selected sites and were analyzed for six PTEs (Ni, Cr, Zn, Cu, Pb and Mn). Among PTEs, Cr showed high mean concentration (497) μg L–1, followed by Zn (414) μg L–1 in mining area, while Zn showed lowest mean value (4.44) μg L–1 in non-mining areas. Elevated concentrations of Ni, Cr and moderate level of Pb in ground and surface water of Mohmand District exceeded the permissible limits set by WHO (2017). Multivariate statistical analyses showed that pollution sources of PTEs were mainly from mafic-ultramafic rocks, acid mine drainage, open dumping of mine-wastes and mine tailings. The hazard quotient (HQ) was highest for children relatively to adults, but not higher than the US-EPA limits. The hazard index (HI) for ingestions of all selected PTEs were lower than the threshold value (HIing <1), except Mohmand District which showed (HI >1) in mining areas through ingestion. Moreover, the carcinogenic risk (CR) values exceeded the threshold limits for Ni and Cr set by the US-EPA (1.0E−04 to 1.0E−06). In order to protect the drinking water sources of the study areas from more contamination, the management techniques and policy for mining operations need to be implemented.

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Potentially harmful elements contamination in water and sediment: Evaluation for risk assessment and provenance in the northern Sulaiman fold belt, Baluchistan, Pakistan

Cited by 47 publications

References 24 publications

Pollution Distribution of Potentially Toxic Elements in a Karstic River Affected by Manganese Mining in Changyang, Western Hubei, Central China

Pollution Distribution of Potentially Toxic Elements in a Karstic River Affected by Manganese Mining in Changyang, Western Hubei, Central China

Holocene life and microbiome profiling in ancient tropical Lake Chalco, Mexico

Contamination Level, Source Identification And Health Risk Assessment of Potentially Toxic Elements In Drinking Water Sources of Mining And Non-Mining Areas of Khyber Pakhtunkhwa, Pakistan

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