Natural and anthropogenic sources of lead, zinc, and nickel in sediments of Lake Izabal, Guatemala

Hernández, Elisandra; Obrist‐Farner, Jonathan; Brenner, Mark; Kenney, William F.; Curtis, Jason H.; Duarte, Edward

doi:10.1016/j.jes.2020.04.020

Cited by 26 publications

(9 citation statements)

References 32 publications

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“…For both the LPI and LI cores, the ages of the terrestrial wood fragments are in stratigraphic order. The 515 cm‐long LPI core covers the last ∼7,000 years (Obrist‐Farner & Rice, 2019; Figure S3 in Supporting Information , Table ), while the 455 cm‐long LI core is much shorter, covering the last ∼1,400 years (Hernández et al., 2020; Figure S4 in Supporting Information , Table ). Our results utilize the weighted mean modeled ages for both cores and are focused on the uppermost 50–115 cm (800–1585 CE) from the LPI core and between 55 and 435 cm (800–1926 CE) for the LI core.…”

Section: Results and Interpretationsmentioning

confidence: 99%

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Incoherency in Central American Hydroclimate Proxy Records Spanning the Last Millennium

Obrist‐Farner

Steinman

Stansell

et al. 2023

Paleoceanog and Paleoclimatol

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Continued global warming is expected to result in reduced precipitation and a drier climate in Central America. Projections of future changes are highly uncertain, however, due to the spatial resolution limitations of models and insufficient observational data coverage across space and time. Paleoclimate proxy data are therefore critical for understanding regional climate responses during times of global climate reorganization. Here we present two lake‐sediment based records of precipitation variability in Guatemala along with a synthesis of Central American hydroclimate records spanning the last millennium (800–2000 CE). The synthesis reveals that regional climate changes have been strikingly heterogeneous, even over relatively short distances. Our analysis further suggests that shifts in the mean position of the Intertropical Convergence Zone, which have been invoked by numerous studies to explain variability in Central American and circum‐Caribbean proxy records, cannot alone explain the observed pattern of hydroclimate variability. Instead, interactions between several ocean‐atmosphere processes and their disparate influences across variable topography appear to have resulted in complex precipitation responses. These complexities highlight the difficulty of reconstructing past precipitation changes across Central America and point to the need for additional paleo‐record development and analysis before the relationships between external forcing and hydroclimate change can be robustly determined. Such efforts should help anchor model‐based predictions of future responses to continued global warming.

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Section: Results and Interpretationsmentioning

confidence: 99%

“…The LI core segment of interest is characterized by homogeneous olive gray silty mud that is faintly laminated and very thinly bedded with minimal organic debris (Hernández et al, 2020). The PCA results show that PC1 (59.2% of variance) mainly captures variability in Ti, Al, Si, Fe, and K (Figure 4, Figure S6 in Supporting Information S1).…”

Section: Lake Izabalmentioning

confidence: 99%

Incoherency in Central American Hydroclimate Proxy Records Spanning the Last Millennium

Obrist‐Farner

Steinman

Stansell

et al. 2023

Paleoceanog and Paleoclimatol

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“…Lead causes oxidative stress and hurts the organs like the brain, kidneys, cells, and nerves, particularly in pregnant women and children. It also has other chronic effects like abdominal pain, headache, lung and stomach cancers, and blood pressure (Hernández et al 2020 ; Muhammad et al 2011 ).…”

Section: Introductionmentioning

confidence: 99%

The concentration of potentially toxic elements (PTEs) in drinking water from Shiraz, Iran: a health risk assessment of samples

Mohammadpour

Emadi

Samaei

et al. 2022

Environ Sci Pollut Res

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The existence of potentially toxic elements (PTEs) in water bodies has posed a menace to human health. Thus, water resources should be protected from PTEs, and their effect on the exposed population should be investigated. In the present investigation, the concentrations of PTEs such as lead (Pb), mercury (Hg), manganese (Mn), and iron(Fe) in the drinking water of Shiraz, Iran, were determined for the first time. In addition, hazard quotient, hazard index, cancer risk, and sensitivity analysis were applied to estimate the noncarcinogenic and carcinogenic impacts of Pb, Hg, Mn, and Fe on exposed children and adults through ingestion. The mean concentrations (µg/L) of Pb, Hg, Mn, and Fe were 0.36, 0.32, 2.28, and 8.72, respectively, in winter and 0.50, 0.20, 0.55, and 10.36, respectively, in summer. The results displayed that Fe concentration was more than the other PTEs. PTE concentrations were lower than the standard values of the Environment Protection Agency and World Health Organization. Values of the degree of contamination and heavy metal pollution index for lead, mercury, manganese, and iron were significantly low (< 1) and excellent (< 50), respectively. Based on the Spearman rank correlation analysis, positive and negative relationships were observed in the present study. The observations of the health risk assessment demonstrated that mercury, lead, iron, and manganese had an acceptable level of noncarcinogenic harmful health risk in exposed children and adults (hazard quotients < 1 and hazard index < 1). The carcinogenic risk of lead was low (< E − 06), which can be neglected. Monte Carlo simulation showed that water intake rate and mercury concentration were the most critical parameters in the hazard index for children and adults. Lead concentration was also the most crucial factor in the cancer risk analysis. The results of the present study proved that the drinking water of Shiraz is safe and healthy and can be confidently consumed by people.

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“…Frequent exposure to Cr has been shown to cause diseases such as bronchitis, diarrhea, and tuberculosis, and a high dose of Zn has been shown to damage islets,disrupt protein metabolism, and cause arteriosclerosis ( Wei et al, 2020). Also Ni poisoning can result in nausea, dizziness, headaches, weakness, and rashes (Hernández et al, 2020). Cu can also cause health problems for humans when exposed to it in quantities through its effect on the liver and kidneys (Yang et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

Evaluation of bioaccessibility of metals and health risk in agriculture soil in Al-Qadisiyah governorate, Iraq

Kazim¹,

Kadhum

2022

ijhs

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The agricultural lands in Al-Qadisiyah Governorate are among the most economical sources in which various agricultural crops are grown, such as rice, wheat, and others. Samples were taken from seven agricultural areas in Al-Qadisiyah Governorate, and the heavy elements, including lead, zinc, cadmium, nickel, copper and chromium, were examined by atomic spectrometry. In order to know the extent of the danger of these elements in the soil and their impact on human health, pollution indices and SBET were used for this purpose. The results showed the highest value of relative bioaccessibility of lead (76.14%) in Ghamas, while the lowest value was (32.5%) in Afak. The largest value of the relative bioaccessibility of cadmium was found in Afak (82.22%), and the lowest value (30.24%) in the city of Shamiya. The pollution load indices revealed agricultural soils of Al-Qadisiyah Governorate ranged from light pollution to high pollution so that the lowest pollution values were for Zn to all agricultural soils, and the highest pollution values were for cadmium, especially in three sites (Afak, Albdair and Ghamas).

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Natural and anthropogenic sources of lead, zinc, and nickel in sediments of Lake Izabal, Guatemala

Cited by 26 publications

References 32 publications

Incoherency in Central American Hydroclimate Proxy Records Spanning the Last Millennium

Incoherency in Central American Hydroclimate Proxy Records Spanning the Last Millennium

The concentration of potentially toxic elements (PTEs) in drinking water from Shiraz, Iran: a health risk assessment of samples

Evaluation of bioaccessibility of metals and health risk in agriculture soil in Al-Qadisiyah governorate, Iraq

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