Characterization of metals in indoor dusts from electronic workshops, cybercafés and offices in southern Nigeria: Implications for on-site human exposure

Iwegbue, Chukwujindu M. A.; Obi, Grace; Emoyan, Onoriode O.; Odali, Eze W.; Egobueze, Francis E.; Tesi, Godswill O.; Nwajei, Godwin E.; Martincigh, Bice S.

doi:10.1016/j.ecoenv.2018.04.070

Cited by 42 publications

(16 citation statements)

References 48 publications

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“…The crustal abundance values of the metals: Cu = 45, Fe = 4.7, Ni = 68, Zn = 95, Cr = 90, and Pb = 20 were adopted as their background concentrations [17], while the background constant for lithogenic correction is 1.5.…”

Section: Pollution Indices Of the Potential Toxic Metals In Dustmentioning

confidence: 99%

“…where Cs = concentration of the metal in the dust; Cb = concentration of the metal in the background sample [17] The pollution load index was calculated from the contamination factor of each metal by using Eq. 4 [19,20].…”

Section: Pollution Indices Of the Potential Toxic Metals In Dustmentioning

confidence: 99%

“…Equation ( 7) [5] was used to calculate the daily dose of metal absorbed through dermal contact ( ADD der ) (mg/kg/ day) for non-carcinogenic (nc) metals: Equation ( 8) [17] was used to calculate the daily dose of metal absorbed through ingestion ( ADD ing−c ) (mg/kg/ day) for carcinogenic metals: Equation ( 7) was also used to calculate the daily dose of metal absorbed through dermal contact ( ADD der−c ) (mg/ kg/day) for carcinogenic metals.…”

Section: Assessment Of Risk Of Exposure To Some Metals In Classroom Dmentioning

confidence: 99%

“…But permissible limits exist for metals in soil. Therefore, this study used the allowable limits for metals in soils in line with previous published studies on dust in Nigerian environment [13,17].…”

Section: Metal Concentrationsmentioning

confidence: 99%

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Concentration and risk assessment of toxic metals in indoor dust in selected schools in Southeast, Nigeria

Ugwu

Ofomatah

2021

SN Appl. Sci.

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The health risk of students’ exposure to some potentially toxic metals in classroom dusts in Southeast, Nigeria was assessed. Dust particles were collected from classrooms in some public high schools and digested with aqua regia before analysis for selected metals by atomic absorption spectrophotometry. The geoaccumulation index, contamination factor and the pollution load index were assessed from the metal concentrations of the dust. Hazard quotient and cancer risk index were used to estimate the potential health risk of students’ exposure to the metals in the dust. The metal concentrations (mg/kg) were in the ranges of 1.57–175.38 (Cr); 0.93–463.28 (Cu); 31.94.76–6623.41 (Fe); 4.96–143.98 (Ni); 2.64–375.27 (Zn); and 2.35–53.96 (Pb).The geo-accumulation index values showed that all the dust samples were polluted with Fe and Cr; and unpolluted with other metals with few exemptions. The contamination factor values showed that all the schools but one had a low contamination status due to Ni and Cu. There was moderate contamination by Pb at all the schools but two. All the schools had high contamination of Cr and Fe. The pollution load index indicated that the quality of all the classrooms was deteriorated. The calculated values of hazard quotient indicated that ingestion of dust at most of the classrooms would have no significant risk of non-carcinogenic effects on the health of the students. Dermal contact with the dust at all the classrooms would expose students to adverse effects of Fe. There will be adverse effect due to Pb for dermal contact with dust at most of the schools. Ingestion of dust particles at classrooms in all the schools would have carcinogenic effect due to Ni. Correlation analysis indicated that the sources of the metals varied. This study provided baseline data for relevant bodies to use in monitoring and controlling pollution so as to protect students from toxic metals.

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Section: Pollution Indices Of the Potential Toxic Metals In Dustmentioning

confidence: 99%

Section: Pollution Indices Of the Potential Toxic Metals In Dustmentioning

confidence: 99%

Section: Assessment Of Risk Of Exposure To Some Metals In Classroom Dmentioning

confidence: 99%

Section: Metal Concentrationsmentioning

confidence: 99%

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Concentration and risk assessment of toxic metals in indoor dust in selected schools in Southeast, Nigeria

Ugwu

Ofomatah

2021

SN Appl. Sci.

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“…Many of these studies were focussed on dust in homes, offices, cybercafés, laboratories, schools and e-waste recycling workshops. 1,8–14 There are limited published data on metals in dusts from SME workplace indoor environments in most African countries and especially Nigeria. This study sought to evaluate the concentrations and risk of human exposure to metals (Cd, Pb, Cr, Ni, Cu, Co, Mn, Zn and Fe) in dusts in indoor workplace environments of SMEs in southern Nigeria.…”

Section: Introductionmentioning

confidence: 99%

Risk assessment of human exposure to potentially toxic metals in indoor dust from some small and medium scale enterprise workplace environments in southern Nigeria

Iwegbue

Nwose

Egobueze³

et al. 2019

Indoor and Built Environment

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This study concerns an assessment of indoor dust from printing press, car spray painting and metal design workshops, with the aim of evaluating the occupational risk arising from exposure to metals present in the dust. The levels of Cd, Pb, Cr, Ni, Cu, Co, Mn, Zn and Fe in the dust samples were quantified by means of atomic absorption spectrometry. The concentrations of metals (mg kg−1) in the indoor dust from these workplace environments varied from <0.003–208 for Cd, 26.5–1530 for Pb, 7.80–346 for Cr, 10.5–490 for Ni, 32.0–1915 for Cu, 3.50–232 for Co, 169–20,300 for Zn, 87.5–7260 for Mn and 8900–661,000 for Fe. The hazard index values were above one for different age groups except for the exposure of teenagers and adults to metals in dusts in the printing press studios and car spray painting workshops. The carcinogenic risk for all age groups relating to human contact with metals (Cd, Pb, Cr and Ni) in dust from these workplace environments via three exposure pathways: oral ingestion, inhalation and dermal contact, were above the safe level of 1.0 × 10−6 but not up to the level (1.0 × 10−4) that requires remedial action.

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Concentration, sources, influencing factors and hazards of heavy metals in indoor and outdoor dust: A review

Chu

Liu

et al. 2022

Environ Chem Lett

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Characterization of metals in indoor dusts from electronic workshops, cybercafés and offices in southern Nigeria: Implications for on-site human exposure

Cited by 42 publications

References 48 publications

Concentration and risk assessment of toxic metals in indoor dust in selected schools in Southeast, Nigeria

Concentration and risk assessment of toxic metals in indoor dust in selected schools in Southeast, Nigeria

Risk assessment of human exposure to potentially toxic metals in indoor dust from some small and medium scale enterprise workplace environments in southern Nigeria

Concentration, sources, influencing factors and hazards of heavy metals in indoor and outdoor dust: A review

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