Assessment of the impacts of municipal solid waste dumps on soils and plants
2017
Nwaogu, Chukwudi | Ogbuagu, Henry D. | Abrakasa, Selegha | Olawoyin, Modupeola A. | Pavlů, Vilém
The study aimed at evaluating the impacts of open municipal solid wastes dumps on soil and vegetation near the main roads linking major cities in Nigeria. We hypothesised that the metals from the wastes exerted substantial impacts at the dump sites which affect the soil and plants. Data were analysed from five dump sites and five control sites. The result revealed that the effects of the heavy metals (HM) were significant and higher at the dump sites where their concentrations were far above the EU, and Canadian environmental quality permissible limits for agricultural soils and vegetation. In contrast with dump sites, a significant relationship (R ² = 0.70; p < .001) was found between the number of plant species and area at control sites. Shrubs and herbs were more tolerance with higher contents of HM compared with grasses. Plants leaves showed more HM contents compared to the shoots or roots. The soil and plants contents of the HM were relatively in the order of Zn > Cr > Pb at both dump sites and control sites. Further study on the effects of more HM on soil and plant is recommended in the area. Recycling and bio-phytoremediation processes should also be introduced.
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