Abstract
Indiscriminate handling and disposal of industrial effluents into the environment represents one of the major sources of environmental pollution which invariably affect plants, animals and humans. This study assessed heavy metal concentration in soils and plants around industries in Agbara industrial estate, Ogun State, Nigeria. Soil and plant samples were collected from four industries and analyzed for lead (Pb), cadmium (Cd), copper (Cu), chromium (Cr) and nickel (Ni). The pH, organic matter content and cation exchange capacity of the soil samples, as well as bioaccumulation factor (BAF) and translocation factor (TF) of the plant samples were examined. The heavy metal concentration order of the soil and plant samples was Pb ?1, 50 mg kg?1, 10 mg kg?1 and 50 mg kg?1 respectively) while Cd was above WHO tolerance limit (3 mg kg?1). Also, Pb, Cd, Cu, and Cr in most plant samples were above WHO tolerance limits (10 mg kg?1, 0.30 mg kg?1, 10 mg kg?1 and 1.5 mg kg?1 respectively). Statistical differences (P Cyperus iria, Alternanthera sessilis, C. esculentus, A. brasiliana, and Megathyrsus maximus are probable accumulators of heavy metals.
Highlights
IntroductionUndesirable effects of poor environmental circumstances on human health are mostly manifested in the environment, predominantly in developing countries where urbanization, industrialization and rapid population growth are taking place on an unprecedented scale
This research aimed to evaluate heavy metal concentration of soils and plants around industries located at Agbara industrial estate, Agbara, Ogun State, Nigeria
bioaccumulation factor (BAF) and translocation factor (TF) values for Pb and Cr in almost all the plant samples could not be obtained because Pb and Cr were not detected either the soil or the plant root/shoot
Summary
Undesirable effects of poor environmental circumstances on human health are mostly manifested in the environment, predominantly in developing countries where urbanization, industrialization and rapid population growth are taking place on an unprecedented scale. Prolonged exposure of man to toxic heavy metals in the cities has been reported by many researchers. Heavy metals have become increasingly significant within the framework of environmental pollution investigation. They are of serious concern as a result of their persistence in the environment and their carcinogenicity to human beings (Hawkes, 1997). This research aimed to evaluate heavy metal concentration of soils and plants around industries located at Agbara industrial estate, Agbara, Ogun State, Nigeria
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