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SUMMARY:Spatial Distribution and Assessment of Background Ionizing Radiati
 on around Waste Dumpsites in Gombe Metropolis\, Nigeria
DTSTART;VALUE=DATE-TIME:20260325T095000Z
DTEND;VALUE=DATE-TIME:20260325T101000Z
DTSTAMP;VALUE=DATE-TIME:20260426T030140Z
UID:indico-contribution-10344@events.saip.org.za
DESCRIPTION:Speakers: Muhammad Nuruddeen Abdulkareem (Department of Physic
 s\, Federal University of Kashere\, Gombe State. Nigeria )\nWaste dumpsite
 s are potential sources of environmental radiation\, yet baseline data for
  many urban centers in northeastern Nigeria remain sparse. This study asse
 ssed the background ionizing radiation levels at ten (10) selected waste d
 umpsites across different land-use categories in Gombe Metropolis\, Nigeri
 a. In situ measurements were conducted using a calibrated Medicom CRM-100 
 Digital Radiation Monitor at a height of 1.0 m above ground level\, with g
 eographic coordinates recorded via GPS. The results indicate that the outd
 oor absorbed dose rates (ADR) ranged from 10.0 ± 1.0 to 23.3 ± 2.3 nGy·
 h⁻¹\, with a mean of 16.7 ± 4.0 nGy·h⁻¹. A spatial variation of 13
 3% was identified between the highest exposure site (Dukku Motor Park) and
  the lowest (Madaki Quarters)\, reflecting a correlation between commercia
 l land-use and elevated radiation levels. The estimated annual effective d
 ose rates (AEDR) varied from 0.018–0.041 mSv·y⁻¹\, while the excess 
 lifetime cancer risk (ELCR) ranged from (0.70 ± 0.07) × 10⁻⁴ to (1.6
 3 ± 0.16) × 10⁻⁴. The maximum ELCR value corresponds to approximatel
 y 16 additional cancer cases per 100\,000 persons\, which is significantly
  lower than the WHO global baseline cancer risk and the ICRP public exposu
 re limit of 1 mSv·y⁻¹. The study concluded that current waste disposal
  practices in the metropolis do not pose an immediate radiological health 
 threat\; however\, routine monitoring is recommended to detect future devi
 ations in the radiological profile.\n\nhttps://events.saip.org.za/event/27
 2/contributions/10344/
LOCATION:
URL:https://events.saip.org.za/event/272/contributions/10344/
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