Seasonal assessment of the physico-chemical properties of surface water and sediments in the vicinity of a scrap metal recycling industry in Southwestern Nigeria

Abstract

The study assessed the seasonal variations in the physico-chemical properties of surface water and sediments in some villages located around a scrap metal recycling industry in Ile-Ife. This is with a view to monitor the impact of the industry on the quality of surrounding water. The three water bodies (one river, one stream and one pond) identified in the area were sampled every other month for ten months. Water and sediment were sampled from the water bodies and their physico-chemical properties were determined using standard methods. Highest and least pH values: 7.15 ± 0.29 and 6.27 ± 0.26 were recorded in river and pond water sample, respectively during dry season, while the least pH values: 5.64 ± 0.09 were recorded in sediment samples from the river during wet season. Fe in water was highest in pond during dry season with (0.10 ± 0.01) mg/L. Stream sediment recorded higher values of Fe (1.02 ± 0.05) mg/kg, Zn (0.48 ± 0.01) mg/kg and Pb (0.09 ± 0.01) mg/kg than in stream water samples, while the values of pH, Mn, Cd and Cr (6.95 ± 0.03, 0.67 ± 0.11, 0.11 ± 0.02, 0.17 ± 0.03)mg/L respectively in stream water were higher than in stream sediment samples. In River, Fe and Zn values were higher in sediment (0.63 ± 0.04 and 0.52 ± 0.01)mg/kg respectively than in water samples, while in the pond pH, Mn, Cd and Cr were higher in water (6.51 ± 0.12, 0.71 ± 0.07, 0.09 ± 0.01 and 0.22 ± 0.03)mg/L respectively than in sediment samples. The study concluded that the scrap metal recycling industry has impact on the surrounding water bodies as the values of cadmium, lead and iron significantly exceeded the national and international standards.

Natural radionuclides and ions concentrations in water and sediments around iron-smelting industry in Ikirun, Osun-State, Nigeria

“…The mean concentration of Ca 2+ is highest in pond 1 (0.112±0.032) mgkg -1 and lowest in pond 3 (0.065±0.018) mgkg -1 while the mean concentration of K + is highest in pond 3 (0.781±0.296) mgkg -1 and lowest in pond 2 (0.411±0.142) mgkg -1 within the sampling locations. The values of the ions obtained in the study are generally high in the pond which is in accordance with the report of Okoya et al (2020b) in a similar study but different locations.…”

Physicochemical, Heavy Metals and Hydrocarbons Studyof Surface Water and Sediment From Alape River and Its Watershed in Igbokoda, South-West Nigeria.

“…It is fascinating to observe that these values align with the recommended limit of 200 mg/L and 600 mg/L as CaCO3 set by regulatory bodies[50,51,53]. These results are consistent with other studies conducted in the south-western region of Nigeria, which reported acidity values ranging from 5.0 mg/L to 12.0 mg/L as CaCO3 and alkalinity values ranging from 33.3 mg/L to 78.60 mg/L as CaCO3[60]. Further emphasizing the reliability of these findings, the control point exhibited an acidity value of 47.63 mg/L as CaCO3 and an alkalinity value of 44.69 mg/L as CaCO3, both falling well below the limits recommended by the regulatory bodies (see Table2).…”

Adsorptive Properties of Sawdust Activated Carbon for the 2,2-Dichlorovinyl-Dimethyl-Phosphate Removal from Agrochemical Industrial Wastewater

“…Preparation and sampling of wastewater: The water sampling bottles (2.5 L) were pre-cleaned according to standard methods for organic contamination sampling 13,14 . To prevent further contamination, the bottles were allowed to air dry for 24 hrs and the mouthparts were wrapped in aluminium foil until sampling.…”