The impact of industrial wastewater on the physicochemical and microbiological characteristics of groundwater in Ajao- Estate Lagos, Nigeria

Abstract

In Ajao Estate, it is believed that poor quality of its groundwater is unconnected to the dislodging of wastewater into the environment by food- and wine-producing industries operating in the area. To ascertain this claim, the impact of this wastewater on microbiological and physicochemical quality of the groundwater was evaluated. Microbiological result of water samples revealed decrease in Staphylococcus aureus, Clostridium spp., Escherichia coli, etc. count from the industrial wastewater dislodging point. Groundwater samples collected from areas under the influence of industrial wastewater showed higher concentration of physicochemical elements than those outside the area of influence (control) except pH (5.96) and Cl (19.80 ppm), while in soil samples, reverse was the case. In groundwater samples, most of the physicochemical parameters were not within the permissible limit for drinking water except zinc (Zn) (0.214 to 1.660 ppm) which falls within World Health and Nigerian limit of 3.0 ppm. The degree of contamination/pollution of all the heavy metals in the soil samples were neither polluted nor contaminated, even though the contamination factor (CF) and geoaccumulation index (I-geo) of cadmium (Cd) was the highest in main soil samples and in control. Negative correlations exist between all the heavy metals in soil samples and those in groundwater except copper (Cu). Reasonable concentrations of all these heavy metals with the exception of manganese (Mn) were seen in the sample of industrial wastewater, suggesting that industrial wastewater may be one of the possible sources of their concentration in groundwater even though there might be other sources.

Assessment of the physicochemical qualities of groundwater and soils around oil-producing communities in Afam, area of Porthacourt, Niger Delta Nigeria

“…I-geo was calculated using the concentration of the following physicochemical parameters from the top layer of both soils pH, PAH, THC, TPHC, TOC, O&G, Cr, Fe, Ni, Pb and Cu using DPR ( 2002) permissible limit as the background value (Table 4). I-geo classification scheme adopted by Muller (1969) and Ukah et al (2018) showed pH, Cr, Fe, Ni, Pb and Cu in the active site to be unpolluted since I-geo values are less than 1 (Fig. 3).…”

Detection, Distribution and Health Risk Assessment of Toxic Heavy Metals/Metalloids, Arsenic, Cadmium, and Lead in Goat Carcasses Processed for Human Consumption in South-Eastern Nigeria

“…Notwithstanding, the increased THMs accumulation in (edible) organs owed to goat s feeding habit and anthropogenic activities, the chevon remains increasingly relished as a special delicacy in Nigeria. Thus, the indiscriminate anthropogenic activities that result in environmental contamination, and subsequent accumulation of THMs [37,38] makes the detection and quantification of toxic metals in goat carcasses processed for human consumption in Nigeria imperative. The work by Okoye and Ugwu [39], to our best knowledge, appears to be the only recent report on toxic metal contamination of goat muscles and edible offals, which was specific to the South-Eastern region of Nigeria, and this was conducted over a decade ago.…”

Influence of Soil Particle Size Distribution on Groundwater Quality around Industrial Areas of Oshodi-Lagos Nigeria

“…Lithologically, Oshodi is underlain by two different lithologicunit; the coastal plain sand and the alluvial river sand. Both sands are part of Dahomey Basin [13]. Coastal plain sand is the aquifer in the study area though very shallow in general [13].…”

“…Both sands are part of Dahomey Basin [13]. Coastal plain sand is the aquifer in the study area though very shallow in general [13].…”