Total petroleum hydrocarbons and trace heavy metals in roadside soils along the Lagos–Badagry expressway, Nigeria

Abstract

This study reports the level of total petroleum hydrocarbons (TPH) and trace heavy metals (lead, copper, and cadmium) in soil samples collected randomly from Iyana-Iba garage, Lagos State University bus stop, Adeniran Ogunsanya College of Education bus stop, and a control site off Lusada-Atan road, near Crawford University, Igbesa, Ogun state. TPH was estimated gravimetrically after Soxhlet extraction and column clean up, while soil metals were determined by atomic absorption spectrometry using mineral acid digestion. For TPH, the sites have mean values of 19.43+/-1.27, 16.11+/-1.85, and 11.43+/-4.33 mg/g with a control mean value of 0.33+/-0.16 mg/g. For trace heavy metals, cadmium was not detected. However, the mean levels of lead are 4.24+/-3.10, 3.72+/-0.60, and 3.70+/-1.32 microg/g, respectively, whereas mean copper concentrations are 20.63+/-9.02, 19.35+/-3.61, and 16.76+/-3.02 microg/g in all sites, respectively, compared to the control mean of 0.25+/-0.13 and 5.99+/-1.23 microg/g for lead and copper, respectively. Sites studied have higher levels of TPH and metals compared to the control soil samples. This is indicated by a statistically significant difference found between the concentration of analyzed elements in soils collected along Lagos-Badagry expressway and the control site.

Assessment of heavy metal toxicants in the roadside soil along the N-5, National Highway, Pakistan

“…Lead level found at N-5 is much higher than those detected by other workers (Bakirdere and Yaman 2008;Swaileh et al 2004;Herngren et al 2006;Adeniyi and Owoade 2009). But it is still lower than some previous studies (Abdul-Wahab 2004;Kakulu 2003).…”

Determination of total petroleum hydrocarbons (TPH) in agricultural soils near a petrochemical complex in Guangzhou, China

“…And the TPH levels were higher compared to other petrochemical areas (Adeniyi and Afolabi 2002;Adeniyi and Owoade 2009;Iturbe et al 2004;Soukup et al 2007). Results also indicated that the soil TPH concentrations varied among three land-use types ( Table 1).…”

A method for the integration of satellite vegetation activities observations and magnetic susceptibility measurements for monitoring heavy metals in soil

“…In particular, soil contamination by heavy metals has become a serious problem in many parts of the world [11][12][13][14][15][16][17]. Heavy metals released into biosphere are not subject to degradation processes and, therefore, they remain in the environment almost indefinitely causing accumulation phenomena.…”