Assessment of Heavy Metals Pollution in Soils and Vegetation around Selected Industries in Lagos State, Nigeria

Abstract

In this study, eleven soil samples and twenty-twoplants samples were collected in the vicinity of eleven industries and a thermal station was analyzed for zinc, copper, iron, lead and cadmium. Soil sample from Egbin thermal station had the highest concentration of Zn (141.06 mg/kg) and Cu (131.70 mg/kg). Soil from international textile had the highest level of Fe and the soil from Nichemtex had the highest concentration Pb and Cd was the highest in soil from Guinness (28.91 mg/kg, 59.80 mg/kg and 1.72 mg/kg respectively). The highest concentrations of the heavy metals were observed from different plants species. Analyses of variance (p < 0.05) showed that heavy metal variation in plant and soil samples were not significant (p > 0.5). There were positive correlations between the heavy metals in the soils and the plant samples indicated that the plants obtained the heavy metals from the soil. Plants having BCF values less than one had limited ability to accumulate, translocate and phytoextract heavy metals. These plants in this study with higher Bioconcentration Factor value especially those greater than one (Croton lobatus, Borreria sp., Cyathula prostrata, Lantana camara, Ficus sp., Mimosa pudica, Eclipta prostrata, Commelina sp. etc.) were suggested for further research and assessment on their bioaccumulation abilities and phytoremediation potential.

Potential human health risk assessment of heavy metals intake via consumption of some leafy vegetables obtained from four market in Lagos Metropolis, Nigeria

“…Statistical analysis showed that Cd concentration in A. viridis and T. occidentalis in Sura market were significantly different (p<0.05) from other markets. Cadmium is a heavy metal with high toxicity and it is a non-essential element in foods and natural waters and it accumulates principally in the kidneys and liver (Divrikli et al, 2006;Adesuyi et al, 2015). Higher values have been previously reported for leafy vegetables cultivated along road sides (0.27 mg/kg) by Oluwole et al (2013 (Adesuyi et al, 2015).…”

“…Cadmium is a heavy metal with high toxicity and it is a non-essential element in foods and natural waters and it accumulates principally in the kidneys and liver (Divrikli et al, 2006;Adesuyi et al, 2015). Higher values have been previously reported for leafy vegetables cultivated along road sides (0.27 mg/kg) by Oluwole et al (2013 (Adesuyi et al, 2015). Cadmium accumulates especially in the kidneys leading to dysfunction of the kidney with increased secretion of e.g.…”

“…Waste water irrigation, air deposition, spillage are major pathway to heavy metals bioaccumulation in vegetables and plants (Singh et al, 2010;Oluwole et al, 2013;Adesuyi et al, 2015). Vegetable is a major part of Nigerian diet and is very susceptible to environmental pollution due to the activities and …”

“…Anthropogenic activities such as; transportation, burning of fossil fuel, construction and manufacturing increase the concentrations of heavy metals in the soils and in some plants (Adesuyi et al, 2015;Adesuyi et al, 2016). Other sources of anthropogenic contamination include the addition of manures, sewage sludge, fertilizers and pesticides to soils, with a number of studies identifying the risks in relation to increased soil metal concentration and consequent crop uptake (Kachenko and Singh, 2006).…”

Mycoremediation of petroleum hydrocarbon polluted soil by <i>Pleurotus pulmonarius</i>

“…Also, most heavy metals such as vanadium, lead, aluminium, nickel and iron, which are usually below detection in unused lubricating oil, have been reported to give high values (ppm) in used oil (Whisman et al, 1974;Adongbede and Sanni, 2014). These heavy metals may be retained in soils in the form of oxides, hydroxides, carbonates, exchangeable cations, and/or bound to organic matter in the soil (Yong et al, 1992;Adesuyi et al, 2015). Nevertheless, this is dependent on the local environmental conditions and on the kind of soil constituents present in the soilwater system.…”