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3 Polish Journal of Environmental Studies

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Investigating the concentrations of different elements in soil and plant composition from a mining area

100%

Olowoyo J. O. , Odiwe A. I. , Mkolo N. M. , Macheka L.

Polish Journal of Environmental Studies

2013

tom 22

nr 4

Contamination of soils around mines by heavy metals has not yet received the serious attention that it deserves in South Africa. The current study evaluated the concentrations and levels of pollution by trace metals in soils around a Ferro-chromium mine in South Africa. Soil samples were collected from 20 locations in four different directions, namely southwest, southeast, northwest, and northeast of the mine. The soils were analyzed for trace metals concentrations using ICP-MS. The result revealed that soil pH was in the acidic medium with a very low level of soil organic matter. The concentrations of elements from the soil followed the order Al > Fe > Ca > Mg > Cr > Na > Mn > Ni > Zn > V > Cu > Pb > As > Cd. Higher concentrations for all the elements were recorded from the topsoil and also from the southwestern direction, and the differences in the concentrations were significant (p> 0.05). A highly significant positive correlation of Fe and Cr with Ni and with each other (0.42 ≤ r ≥ 0.82) were recorded. The Pi (pollution index) and I-geo (geoaccumulation index) indicated that the soils around the mine were severely contaminated with Cr and Ni. The concentrations of Fe, Cr, and Ni from the soil samples were high enough to cause serious health problems for people living in the area.

Trace metals in soil and plants around a cement factory in Pretoria, South Africa

100%

Olowoyo J. O. , Mugivhisa L. L. , Busa N. G.

Polish Journal of Environmental Studies

2015

tom 24

nr 5

Influence of wind direction on the level of trace metals in plants collected around a quarry site in South Africa

88%

Raimi I. O. , Komolafe B. F. , Akboola O. O. , Mugivhisa L. L. , Olowoyo J. O.

Polish Journal of Environmental Studies

2019

tom 28

nr 5

Industrialization has resulted in the release of pollutants, especially trace metals, to the environment, which adversely affects the ecosystem. The present study investigated the influence of wind direction on the level of trace metals deposited on vegetation around the quarry site. Three plants common to the four cardinals of the quarry site, precisely 10 meters away, were collected and transported to a laboratory, where further analyses were carried out to determine the trace metal contents in the air-dried unwashed plants. The plants collected from the southwest direction, which represents the position of the stack that emits smoke from the quarry site, recording the highest trace metal concentration. The result of the plant analysis for trace metal concentration showed that Lantana camara among the three plants bio-accumulated most of the trace metals from the quarry site and other adjoining environment. The levels of trace metals from the plants exceeded the acceptable limits for human and livestock consumption. The study therefore concluded that wind direction and the position of the stack played a significant role in the amount of trace metals around the quarry site.