Journal of
Soil Science and Environmental Management

  • Abbreviation: J. Soil Sci. Environ. Manage.
  • Language: English
  • ISSN: 2141-2391
  • DOI: 10.5897/JSSEM
  • Start Year: 2010
  • Published Articles: 268

Full Length Research Paper

Spatial distribution of heavy metals in soil with distance from Tazama pipeline through the Mikumi National Park, Tanzania

Doreen Jeremiah Mrimi
  • Doreen Jeremiah Mrimi
  • Department of Conservation Biology Faculty of Biology, University of Dodoma (UDOM), Tanzania.
  • Google Scholar
Julius William Nyahongo
  • Julius William Nyahongo
  • Department of Conservation Biology Faculty of Biology, University of Dodoma (UDOM), Tanzania.
  • Google Scholar
Pål Olav Vedeld
  • Pål Olav Vedeld
  • Department of International Environment and Development studies, Faculty of Land and Society Norwegian University Life Sciences, (NMBU), Norway.
  • Google Scholar
Boniface Hussein Massawe
  • Boniface Hussein Massawe
  • Department of Soil and Geological Sciences, Faculty of Agriculture, Sokoine University of Agriculture (SUA), Tanzania.
  • Google Scholar
Charlotte Nakakaawa Jjunju
  • Charlotte Nakakaawa Jjunju
  • Department of Geography, Faculty of Social and Educational Sciences, Norwegian University of Science and Technology (NTNU), Norway.
  • Google Scholar


  •  Received: 16 May 2019
  •  Accepted: 12 July 2019
  •  Published: 31 July 2019

Abstract

A total concentration of six studied heavy metals Arsenic (As), Lead (Pb), Chromium(Cr), Mercury (Hg) Cadmium (Cd) and Copper (Cu) were measured in soil across distances from TAZAMA pipeline in transects which have incidences of oil spillage and those which have no history of oil spillage. All studied heavy metals were detected in the study area. As, Pb and Cr were detected in both transects, that is, with oils spills and those with no history of oil spillage to a distance of 0-35 m from the edge of the pipeline, with higher mean concentration in transects with oil spillage compared to those with none. From 50-200 m away from the pipeline these four metals were detected in transects with oil spillage only. Hg and Cd were detected in transects with history of oil spillage only.  Cu was detected in all transects and at all ranges of distance. Concentration of studied heavy metals decreased with increased distance from the edge of the pipeline in both transects to all directions. The decrease was statistically significant in transects with oil spillage and insignificant with transects of no history of oil spillage.

Key words: Soil contamination, pollution, oil spill effects, Mikumi National Park ecosystem, endangered species.