Soil contamination by risk elements in Awotan dumpsite, Ibadan Nigeria

B.Sc. Noheem Tijani

Diplomová práce

Abstract:

The disposition of solid wastes has become a crucial problem in most developing countries. Solid waste disposal sites are often turned into arable fields without detail chemical analysis of their soils. This research aimed to determine the content of risk elements in soils from the dumpsite with deposition of wastes over the last 200 years, Awotan in Nigeria. The content of risk elements was compared with regulatory values as proposed by different institutions. The total content of elements in the soils from the dumpsite was determined using Aqua regia extraction followed by Atomic Absorption Spectrophotometry analysis. The contents of Ti, As, Pb, Ni, and Cd were substantially higher than the regulatory values for agricultural soils. As the soils of dumpsite were highly alkaline, many metals were present in an insoluble form and accumulated because of the long-term deposition of industrial and domestic wastes. The content of risk elements in he soil increased gradually from the surface up the depth 75 cm indicating that some elements were able to migrate in the soil profile. Although the total content of P, Ca, S, Mn, and Na was relatively high in the soil, the dumpsite was not suitable for the agricultural production because the content of risk elements was above regulatory values. Although dumpsites can be potentially interesting areas for agricultural production, their soils must be first of all analysed for the content of risk elements.

Keywords

Atomic Absorption Spectrophotometer, Dumpsite, Industrial waste, Risk element, Total elements

Jazyk práce: angličtina

Datum vytvoření / odevzdání či podání práce: 29. 6. 2020

Obhajoba závěrečné práce

• Vedoucí: prof. RNDr. Michal Hejcman, Ph.D. Ph.D.

Česká zemědělská univerzita v Praze

Fakulta životního prostředí

Magisterský studijní program / obor:
Inženýrská ekologie / Nature Conservation