heavy metals

ABSTRACT: Heavy metal concentration and physicochemical changes of soil treated with spent engine oil (SEO) and poultry manure after 12 weeks of growing Cyperus compressus was this study’s aim. Poultry manure (PM) was 10 % of 4000g (400 g) while the soil was 3600 g.

This study was aimed at monitoring the quality of produced water from a flow station waste pit located in Ologbo in Edo State of Nigeria, in order to ascertain the levels of compliance to environmental standards. Samples were analyzed for physicochemical, polycyclic aromatic hydrocarbons and microbiological qualities adopting standard analytical procedures.

Groundwater consumption is increasing due to high susceptibility of contamination of other sources. In this study, the consumption, contamination and management of groundwater resource in Isiohor quarters in Edo State were evaluated. A total of 300 questionnaires were randomly administered and laboratory analysis was carried out to determine the physicochemical parameters of the water samples collected. The results obtained showed that 94.7% of the respondents depend on groundwater as against 5.3% that use harvested rainwater.

In Nigeria, the continuous discharge of industrial wastewater with non-complaint quality parameters as stipulated by the National Environmental Standards and Regulation Enforcement Agency (NESREA) is a daunting challenge. This precarious situation has led to the continuous decline in our freshwater quality, with adverse environmental and health implications. Consequently, monitoring of wastewater discharged from industries is of utmost importance in order to check them and raise awareness, where necessary.

Although there is increased global concern on sustainable environmental and human health management, the African countries are still unserious which should not be the case considering the potential consequences of harmful chemicals discharge into our environment from domestic and other anthropogenic activities. We are therefore reporting in this paper a spectroscopic assessment of heavy metals in wastewater generated from students’ halls of Usmanu Danfodiyo University Sokoto, Nigeria.

Comparative assessment of the soil and vegetation in a municipal dumpsite at Iguomo, Benin City, Nigeria at different distances from the dumpsite was carried out. An area of 30m2 was marked out and divided into three plots of 10 m2 each and these were designated as plots A, B and C. An area of 10 m2 was also taken at a distance of 100m away from the dumpsite, it served as the control plot or plot D. Population sampling was done to determine the species diversity across the plots. Soil samples were collected from each plot and microbial and physico-chemical analyses were carried out.

The content and risk of nine heavy metals (Cd, Pb, Ni, Cr, Cu, Co, Mn, Zn and Fe) were quantified and assessed in jams consumed in Nigeria. The heavy metal contents were quantified using atomic absorption spectrometry (AAS) after digesting jam samples with mixture of acids. The quantified content (mg/kg) of the heavy metals in the jams ranged from 1 suggesting health concern for individuals consuming these jams regularly.

The mangrove ecosystem is well known to be impacted by anthropogenic activities such as oil spillage, agricultural run-off, industrial effluents, and mining in coastal areas. These activities increase heavy metals accumulated by mangroves, which are eventually released back into the environment via decomposition. This study aimed to analyze the concentration of heavy metals including cadmium (Cd), Zinc (Zn), lead (Pb), and copper (Cu) in the roots and leaves of Rhizophora racemosa and mangrove sediments obtained from Egbokodo mangrove swamp in Delta State, Nigeria.

This study assessed heavy metals (HMs) contamination in road dust using geochemical indices and their potential risks from an urban environment in Delta State, Nigeria. Fifteen road dust samples were sampled, digested in aqua regia and their HMs concentrations determined using atomic absorption spectrometry.