Open AccessHeavy Metals Distribution in Soil at Different Depths and Radiuses around Landfills in Districts of Nyékonakpoè, Akodesséwa and Amoutivé in Lomé City
Author(s) -
Goliyendou Yandi,
Gbéchi Mawussi,
Amen Yawo Nééné,
Komla Sanda
Publication year - 2021
Publication title -
asian journal of applied sciences
Language(s) - English
Resource type - Journals
ISSN - 2321-0893
DOI - 10.24203/ajas.v9i5.6740
Subject(s) - topsoil , environmental science , heavy metals , groundwater , contamination , mercury (programming language) , arsenic , cadmium , soil test , environmental chemistry , atomic absorption spectroscopy , soil contamination , environmental engineering , soil water , soil science , chemistry , geology , ecology , physics , geotechnical engineering , organic chemistry , quantum mechanics , biology , computer science , programming language
This study aims to provide baseline data about soil contamination by some heavy metals at different depths around landfills in areas at high risk of groundwater contamination. Soil samples were taken in three replicates at depth of 0 – 20 cm, 20 – 40 cm and 40 - 60 cm in the radiuses of 0 to 10 m, 10 to 20 m and 20 to 30 m around landfills. In all, 81 homogenized composite soil samples were collected. The heavy metals were measured in soil samples by atomic absorption spectrophotometer. The results show that the concentration of mercury (0.03 – 0.29 mg kg-1), cadmium (0.04 – 0.69 mg kg-1), arsenic (0.05 – 2.30 mg kg-1) and nickel (0.05 – 2.35 mg kg-1) in analyzed soil samples were lower than the limit values set by WHO, Finland and Dutch environment ministries. However, lead concentrations (90.15 – 129.14 mg kg-1) in topsoil in vicinity of landfills in Amoutivé and Akodesséwa were above reference values set by WHO, Finland and Dutch environment ministries. As the heavy metals may be leached to reach groundwater, the landfills management must be great concern to municipal authorities. The frequent monitoring of the quality of soil and groundwater will be necessary to follow the level environmental contamination by heavy metals around landfills and the possible initiate remedial measures.