Heavy Metals Speciation and Human Health Risk Assessment at an Illegal Gold Mining Site in Igun, Osun State, Nigeria

Olujimi, Olanrewaju Olusoji; Oputu, Ogheneochuko; Fatoki, Olalekan S; Opatoyinbo, Oluwabamise Ester; Aroyewun, Oladokun Ali; Baruani, Judith

doi:10.5696/i2156-9614-5-8.19

Cited by 45 publications

(30 citation statements)

References 31 publications

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“…The study revealed significantly high concentration of Pb from classroom dusts. A report pointed out from a separate study conducted in Nigeria that Pb from most classrooms in their study were well above the limit of 140 g/g set by California Human Health Limits [21,22]. Sources of Pb in the classrooms may be a result of the influence of the winds which can cause quantities of Pb-bearing soil particles from the road sides to be deposited into the classrooms since the windows of the classrooms are usually opened and cleaning may not take place every school day [23].…”

Section: Resultsmentioning

confidence: 99%

Composition of Trace Metals in Dust Samples Collected from Selected High Schools in Pretoria, South Africa

Olowoyo

Mugivhisa

Magoloi

2016

Applied and Environmental Soil Science

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Potential health risks associated with trace metal pollution have necessitated the importance of monitoring their levels in the environment. The present study investigated the concentrations and compositions of trace metals in dust samples collected from classrooms and playing ground from the selected high schools In Pretoria. Schools were selected from Pretoria based on factors such as proximity to high traffic ways, industrial areas, and residential areas. Thirty-two dust samples were collected from inside and outside the classrooms, where learners often stay during recess period. The dust samples were analysed for trace metal concentrations using Inductively Coupled Plasma-Mass Spectrometry (ICP-MS). The composition of the elements showed that the concentrations of Zn were more than all other elements except from one of the schools. There were significant differences in the concentrations of trace metals from the schools ( < 0.05). Regular cleaning, proximity to busy road, and well maintained gardens seem to have positive effects on the concentrations of trace metals recorded from the classrooms dust. The result further revealed a positive correlation for elements such as Pb, Cu, Zn, Mn, and Sb, indicating that the dust might have a common source.

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Section: Resultsmentioning

confidence: 99%

Composition of Trace Metals in Dust Samples Collected from Selected High Schools in Pretoria, South Africa

Olowoyo

Mugivhisa

Magoloi

2016

Applied and Environmental Soil Science

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“…In urban atmospheres, ambient trace elements typically represent a small fraction of PM 2.5 on a mass basis, while elemental species like Cd, As, Co, Cr, Ni, Pb and Se are considered as human carcinogens even in trace amounts (Iyengar and Woittiez, 1988;Wang et al, 2006;Olujimi et al, 2015). It has been shown that Cu, Cr, Fe and V have several oxidation states that can participate in many atmospheric redox reactions (Litter, 1999;Brandt and van Eldik, 1995;Seigneur and Constantinou, 1995;Rubasinghege et al, 2010a), which can catalyze the generation of reactive oxygenated species (ROSs) that have been associated with direct molecular damage and with the induction of biochemical synthesis pathways (Charrier and Anastasio, 2012;Strak et al, 2012;Rubasinghege et al, 2010b;Saffari et al, 2014;Verma et al, 2010;Jomova and Valko, 2011).…”

Section: Introductionmentioning

confidence: 99%

First long-term and near real-time measurement of trace elements in China's urban atmosphere: temporal variability, source apportionment and precipitation effect

et al. 2018

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Abstract. Atmospheric trace elements, especially metal species, are an emerging environmental and health concern with insufficient understanding of their levels and sources in Shanghai, the most important industrial megacity in China.Here we continuously performed a 1 year (from March 2016 to February 2017) and hourly resolved measurement of 18 elements in fine particles (PM 2.5 ) at the Shanghai urban center with an Xact multi-metals monitor and several collocated instruments. Mass concentrations (mean ± 1σ ; ng m −3 ) determined by Xact ranged from detection limits (nominally 0.1 to 20 ng m −3 ) to 15 µg m −3 . Element-related oxidized species comprised an appreciable fraction of PM 2.5 during all seasons, accounting for 8.3 % on average. As a comparison, the atmospheric elements concentration level in Shanghai was comparable with that in other industrialized cities in East Asia but 1 or 2 orders of magnitude higher than at sites in North America and Europe. Positive matrix factorization (PMF) was applied to identify and apportion the sources of the elements in the PM 2.5 mass. Five different factors were resolved (notable elements and relative contribution in parentheses): traffic-related (Ca, Fe, Ba, Si; 46 %), shipping (V, Ni; 6 %), nonferrous metal smelting (Ag, Cd, Au; 15 %), coal combustion (As, Se, Hg, Pb; 18 %) and ferrous metal smelting (Cr, Mn, Zn; 15 %). The contribution from the exhaust and non-exhaust vehicle emissions, i.e., the traffic-related factor shows a strong bimodal diurnal profile with average concentration over 2 times higher during the rush hour than during nighttime. The shipping factor was firmly identified because V and Ni, two recognized tracers of shipping emissions, are almost exclusively transported from the East China Sea and their ratio (around 3.2) falls within the variation range of V / Ni ratios in particles emitted from heavy oil combustion. Interestingly, nearly half of the K was derived from coal combustion with high mineral affinity (elements associated with aluminosilicates, carbonates and other minerals in coal ash). The contributions of nonferrous metal smelting to the trace elements are consistent with a newly developed emission inventory. Although the precipitation scavenging effect on the mass concentration of the trace elements varied among different species and sources, precipiPublished by Copernicus Publications on behalf of the European Geosciences Union. 11794Y. Chang et al.: First long-term and near real-time measurement of trace elements tation could effectively lower the concentration of the trafficand coal combustion-related trace elements. Therefore, water spray to simulate natural types of precipitation could be one of the abatement strategies to facilitate the reduction of ambient PM 2.5 trace elements in the urban atmosphere. Collectively, our findings in this study provide baseline levels and sources of trace elements with high detail, which are needed for developing effective control strategies to reduce the high risk of acute exposure to atmospheri...

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“…Using Equations 2, 3, and 4, the chronic daily intake (CDI) mg/kg/day was used to evaluate exposure to heavy metals in the soil 18,20,21 where, …”

Section: Methodsmentioning

confidence: 99%

Analysis and Hazard Assessment of Potentially Toxic Metals in Petroleum Hydrocarbon-Contaminated Soils Around Transformer Installation Areas

Akhigbe

Adebiyi

Torimiro

2019

Journal of Health and Pollution

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Heavy Metals Speciation and Human Health Risk Assessment at an Illegal Gold Mining Site in Igun, Osun State, Nigeria

Cited by 45 publications

References 31 publications

Composition of Trace Metals in Dust Samples Collected from Selected High Schools in Pretoria, South Africa

Composition of Trace Metals in Dust Samples Collected from Selected High Schools in Pretoria, South Africa

First long-term and near real-time measurement of trace elements in China's urban atmosphere: temporal variability, source apportionment and precipitation effect

Analysis and Hazard Assessment of Potentially Toxic Metals in Petroleum Hydrocarbon-Contaminated Soils Around Transformer Installation Areas

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