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Samuel Obiri   Mr.  Research Director 
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Samuel Obiri published an article in September 2016.
Top co-authors See all
Hing Man Chan

189 shared publications

University of Ottawa, 6363, Department of Biology, Ottawa, Ontario, Canada

Niladri Basu

158 shared publications

Faculty of Agricultural and Environmental Sciences; McGill University; Montreal Quebec Canada

Richard Neitzel

96 shared publications

The University of Michigan

Frederick Armah

77 shared publications

Department of Environmental Science, School of Biological Sciences, College of Agriculture and Natural Sciences, University of Cape Coast, Ghana

Mark L Wilson

51 shared publications

Department of Epidemiology, School of Public Health, University of Michigan, Ann Arbor, USA

Publication Record
Distribution of Articles published per year 
(2010 - 2016)
Total number of journals
published in
Publications See all
Article 0 Reads 1 Citation Exposure to toxicants in soil and bottom ash deposits in Agbogbloshie, Ghana: human health risk assessment O. D. Ansa-Asare, S. Mohammed, H. F. Darko, A. G. Dartey, S.... Published: 23 September 2016
Environmental Monitoring and Assessment, doi: 10.1007/s10661-016-5575-x
DOI See at publisher website
Article 0 Reads 4 Citations Levels of arsenic, mercury, cadmium, copper, lead, zinc and manganese in serum and whole blood of resident adults from m... Samuel Obiri, Philip O Yeboah, Shiloh Osae, Sam Adu-Kumi Published: 14 May 2016
Environmental Science and Pollution Research, doi: 10.1007/s11356-016-6537-0
DOI See at publisher website PubMed View at PubMed
Article 0 Reads 3 Citations Working conditions of male and female artisanal and small-scale goldminers in Ghana: Examining existing disparities Frederick Ato Armah, Sheila A. Boamah, Reginald Quansah, Sam... Published: 01 April 2016
The Extractive Industries and Society, doi: 10.1016/j.exis.2015.12.010
DOI See at publisher website
Article 0 Reads 1 Citation Assessing the Environmental and Socio-Economic Impacts of Artisanal Gold Mining on the Livelihoods of Communities in the... Samuel Obiri, Precious A. D. Mattah, Memuna M. Mattah, Frede... Published: 26 January 2016
International Journal of Environmental Research and Public Health, doi: 10.3390/ijerph13020160
DOI See at publisher website PubMed View at PubMed ABS Show/hide abstract
Gold mining has played an important role in Ghana’s economy, however the negative environmental and socio-economic effects on the host communities associated with gold mining have overshadowed these economic gains. It is within this context that this paper assessed in an integrated manner the environmental and socio-economic impacts of artisanal gold mining in the Tarkwa Nsuaem Municipality from a natural and social science perspective. The natural science group collected 200 random samples on bi-weekly basis between January to October 2013 from water bodies in the study area for analysis in line with methods outlined by the American Water Works Association, while the social science team interviewed 250 residents randomly selected for interviews on socio-economic issues associated with mining. Data from the socio-economic survey was analyzed using logistic regression with SPSS version 17. The results of the natural science investigation revealed that the levels of heavy metals in water samples from the study area in most cases exceeded GS 175-1/WHO permissible guideline values, which are in tandem with the results of inhabitants’ perceptions of water quality survey (as 83% of the respondents are of the view that water bodies in the study area are polluted). This calls for cost-benefits analysis of mining before new mining leases are granted by the relevant authorities.
Article 0 Reads 6 Citations Human Health Risk Assessment of Artisanal Miners Exposed to Toxic Chemicals in Water and Sediments in the PresteaHuni Va... Samuel Obiri, Philip O. Yeboah, Shiloh Osae, Sam Adu-Kumi, S... Published: 18 January 2016
International Journal of Environmental Research and Public Health, doi: 10.3390/ijerph13010139
DOI See at publisher website PubMed View at PubMed ABS Show/hide abstract
A human health risk assessment of artisanal miners exposed to toxic metals in water bodies and sediments in the PresteaHuni Valley District of Ghana was carried out in this study, in line with US EPA risk assessment guidelines. A total of 70 water and 30 sediment samples were collected from surface water bodies in areas impacted by the operations of artisanal small-scale gold mines in the study area and analyzed for physico-chemical parameters such as pH, TDS, conductivity, turbidity as well as metals and metalloids such as As, Cd, Hg and Pb at CSIR—Water Research Institute using standard methods for the examination of wastewater as outlined by American Water Works Association (AWWA). The mean concentrations of As, Cd, Hg and Pb in water samples ranged from 15 μg/L to 325 μg/L (As), 0.17 μg/L to 340 μg/L (Cd), 0.17 μg/L to 122 μg/L (Pb) and 132 μg/L to 866 μg/L (Hg), respectively. These measured concentrations of arsenic (As), mercury (Hg), cadmium (Cd) and lead (Pb) were used as input parameters to calculate the cancer and non-cancer health risks from exposure to these metals in surface water bodies and sediments based on an occupational exposure scenario using central tendency exposure (CTE) and reasonable maximum exposure (RME) parameters. The results of the non-cancer human health risk assessment for small-scale miners working around river Anikoko expressed in terms of hazard quotients based on CTE parameters are as follows: 0.04 (Cd), 1.45 (Pb), 4.60 (Hg) and 1.98 (As); while cancer health risk faced by ASGM miners in Dumase exposed to As in River Mansi via oral ingestion of water is 3.1 × 10−3. The hazard quotient results obtained from this study in most cases were above the HQ guidance value of 1.0, furthermore the cancer health risk results were found to be higher than the USEPA guidance value of 1 × 10−4 to 1 × 10−6. These findings call for case-control epidemiological studies to establish the relationship between exposure to the aforementioned toxic chemicals and diseases associated with them as identified in other studies conducted in different countries as basis for developing policy interventions to address the issue of ASGM mine workers safety in Ghana.
Article 0 Reads 14 Citations Comparative Assessment of Heavy Metals in Drinking Water Sources in Two Small-Scale Mining Communities in Northern Ghana Samuel Cobbina, Abudu Duwiejuah, Reginald Quansah, Samuel Ob... Published: 28 August 2015
International Journal of Environmental Research and Public Health, doi: 10.3390/ijerph120910620
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The study assessed levels of heavy metals in drinking water sources in two small-scale mining communities (Nangodi and Tinga) in northern Ghana. Seventy-two (72) water samples were collected from boreholes, hand dug wells, dug-out, and a stream in the two mining communities. The levels of mercury (Hg), arsenic (As), lead (Pb), zinc (Zn), and cadmium (Cd) were determined using an atomic absorption spectrophotometer (AAS). Mean levels (mg/l) of heavy metals in water samples from Nangodi and Tinga communities were 0.038 and 0.064 (Hg), 0.031 and 0.002 (As), 0.250 and 0.031 (Pb), 0.034 and 0.002 (Zn), and 0.534 and 0.023 (Cd), respectively, for each community. Generally, levels of Hg, As, Pb, Zn, and Cd in water from Nangodi exceeded the World Health Organisation (WHO) stipulated limits of 0.010 for Hg, As, and Pb, 3.0 for Zn and 0.003 for Cd for drinking water, and levels of Hg, Pb, and Cd recorded in Tinga, exceeded the stipulated WHO limits. Ingestion of water, containing elevated levels of Hg, As, and Cd by residents in these mining communities may pose significant health risks. Continuous monitoring of the quality of drinking water sources in these two communities is recommended.