World Bank assisted National Agricultural Research Project (NARP) - University of Port Harcourt
Abstract
Dumpsites in Nigeria are generally open and significantly elevate the
pollution and contamination level of the total environment. Indoor
radon was measured with CR-39 detectors in some buildings in the
vicinity of dumpsites in Lagos, Nigeria. Eight (8) dumpsites (4 dormant
and 4 active dumpsites) were chosen for this study. Detectors were
exposed in 50 houses randomly selected within 0 and 100m away from the
dumpsites. The detectors were exposed for 3 months. They were then
retrieved and etched in a 6M NaOH solution in a water-bath at a
temperature of 90oC for 3 hours. Tracks were counted using a
semi-automatic system with a DCE camera mounted on a microscope and
connected to a PC. Radon concentration ranged from 24.00\ub14.86 to
656.00\ub1131.20 Bqm-3 in the active dumpsites. Mean concentrations
were 120.3\ub124.0, 257\ub151.4, 179.8\ub133.6, and
131.5\ub119.4, respectively in Oke-Odo, MRF, Olusosun, and Solus-3.
In the dormant sites, concentration ranged from 16\ub13.2 to
931\ub1186.3 Bqm-3 having means of 194.17\ub138.80,
206.75\ub141.33, 223.25\ub144.69, and 334\ub166.85Bqm-3,
respectively in Oke-Afa, Solus-1, Solus-2, and Solus-4. The annual
effective dose and cancer risk in the active and dormant dumpsites were
(3.60 mSv, 8.97 per million person-yearly) and (4.53 mSv, 12.47 per
million person-yearly), respectively. This study revealed some high
value of radon concentrations in some houses close to the dormant
dumpsites than in the active dumpsites. This is unsafe and can cause
severe health issues in the long term
Is data on this page outdated, violates copyrights or anything else? Report the problem now and we will take corresponding actions after reviewing your request.