Source Analysis of Heavy metals and Polycyclic Aromatic Hydrocarbons from a popular dumpsite, Lagos State, Nigeria

Abstract

In this study, landfill leachates and plants from Olusosun landfill in Ojota area of Lagos State, Nigeria were investigated. Physicochemical parameters, concentrations of heavy metals (HMs -Pb, Cd, Cr, Ni, Mn and Zn) and polycyclic aromatic hydrocarbons (PAHs) were determined in leachates while HMs and PAHs were determined in plants. Nitric and Perchloric acid mixtures were used for digesting both leachates and plant samples before quantification by atomic absorption spectrometry. Cold extraction was used for extracting PAHs and was quantified using gas chromatography-mass spectrometry. The range of results on HMs analysis were:

Concentration of Polycyclic Aromatic Hydrocarbons in Water from Hand-dug Wells in Some Communities in Ekpeyeland, Rivers State, Nigeria

“…The highest PAHs total value was observed at Okoma I and Okoma II. The values of PAHs obtained from well water in the present research are lower than the values of Mohammed et al [26] in borehole water from central Parts of Nigeria where asphalt generation activities are predominant. The values were equally lower than those of Montuori et al [27] in groundwater from Camplania plain, Italy.…”

“…When PAHs are generated from in industrial activities occasioned by massive incineration and burning, vehicular source releases, and burning of fuel such as wood, petroleum and grasses, it passes through the atmosphere and are deposited on land surface, surface runoff and then penetrate the water ecosystem by downward percolation and transfer deep into the aquifer formation [29,30]. Numerous studies [26,27,28,31,32] have displayed that PAHs formation and destruction are associated occurrences that is capable of leading to a net escalation of these unsafe combinations in the output of burning schemes.…”

Pollution investigation and risk assessment of polycyclic aromatic hydrocarbons in soil and water from selected dumpsite locations in rivers and Bayelsa State, Nigeria

“…The dominance of the low molecular weight PAHs in this study suggests a recent release of PAHs to the environment from different sources due to the LMW PAHs are more biodegradable, less lipophilic and are not to be sorbed as strongly as the HMW PAHs [35]. The presence of low molecular weight PAHs in the environment usually results from the emission of oil spills, domestic coal burning and noncombustible matter, while high molecular weight PAHs results from emission of incomplete combustion of organic matter and solid wastes and industrial plants emission [36].The results were similar to study carried out by Ekpete et al [37] and Mohammed et al [34] to determine the concentration of PAHs from selected dumpsites within Port Harcourt metropolis, where they attributed the dominance of 2-3 membered rings in majority of the dumpsites and concentrations of leachates from a popular dumpsite in Lagos state respectively, but was not in agreement to the result of Adedosu et al [36] in Balogun-Biro dumpsite, Nigeria where high molecular weight PAHs dominants to the low molecular weight PAHs.…”

“…The high concentration of PAHs observed at Eleme dumpsite in this study could be as a result of open burning and oil /petrochemical industries located in Eleme which discharge their wastes at these dumpsites. According to Mohammed et al [34], municipal waste and waste discharge from industrial sites are part of the factors causing a high concentration of PAHs in dumpsites soil. The lowest concentration (0.1060) mg/kg was detected in the control sample located far away from the dumpsites and industrial activities.…”

Mobile Phase Selection by Optimization for the Determination of Multiple Pesticides Using Liquid Chromatography-Tandem Mass Spectrometry

“…At long run, the contaminants pollute the foods through their respective circulatory movements in the environment [5]. The contaminants include inorganic matters such as heavy metals [6][7][8], as well as organic chemicals such as heat generated compounds [polycyclic aromatic hydrocarbons (PAHs) and acrylamide)] [9], organic polymers (bromodiphenyl ethers, chlorobiphenyls, chlorodibenzodioxins, chlorodibenzofurans etc), mycotoxins (aflatoxins), perfluoroalkyl acids [10][11][12]. Other contaminants with emerge-concerns include phthalates, bisphenol A, alkylphenols [13], phytosterols, estrogens, phytoestrogens [14], pharmaceuticals/veterinary drugs, synthetic dyes and pesticides [15][16][17][18].…”