Evaluating the spatial distribution of soil physicochemical characteristics and heavy metal toxicity potential in sediments of Nworie river micro-watershed Imo state, southeastern Nigeria

Environmental Pollution loads on surface Water Chemistry and Potentially Ecological Risks of Inland Aquatic Ecosystem In South-eastern State, Nigeria

“…Ubuoh et al, 2021). Similar ranges were reported for same river(5.70-7.20) byEkhator et al (2011) and elsewhere within Edo State(Imoobe and Koye, 2011;Anyanwu, 2012).…”

“…MR had the lowest value (0.139) while LR (0.169) had the highest value at P ≤ 0.05 signi cant difference, with a mean of 0.140 NTU lower than the WHO limit of 1.00 NTU (WHO, 2011). The mean turbidity of this study is at variant with result ofAyobahan et al (2014) in Benin River, Nartey et al (2012) in Accra and Chima et al (2009) in Asata-Enugu whose ndings were 4.33-6.11, 6.4-16.3 and 32.0-43.4NTU respectively.The turbidity levels in the middle and lower rivers may be attributed to the presence of household municipal wastes and medical wastes dumped in the river(Ubuoh et al, 2012;Ubuoh et al, 2021).Hardness as CaCO 3 recorded 226.7 mgL − 1 in the LR, while the lowest value of 123.3 mgL − 1 was observed in MR and were statistically different at P ≥ 0.05 across the courses of the river, with a mean of 172.8mg/l above the WHO standard of 100.0 mgL − 1 (WHO, 2011). Water hardness leads to rapid exhaustion of washing soap, and chie y in uenced by the presence of calcium and magnesium salts (Ca 2+ and Mg 2+ ) (DWAF, 1993).The value of the mean hardness in the present study exceeds that of the ndings ofDuru and Nwannekwu (2012) whose values were between 18.6 to 36.01mg/l.…”

“…The sources of iron pollution in the river are suspected to come from refuse dumps, runoff from metal scrape and medical wastes dumpsites.Nickel statistically varied at P ≤ 0.05 among the river courses, and ranging from 0.003-0.037 mg/L with a mean of 0.024mgl slightly above the 0.02mg/l WHO permissible limit of potable water (WHO, 2011), and less than Ni concentrations that ranged from 17 to 455 mg/L on surface water chemistry of Werii catchment, Tigray, Ethiopia(Haftu and Estifanos, 2020). Nickel comes from discharges of industrial and municipal wastes into the river(Ubuoh et al, 2010;Zaigham et al, 2012; EFSA, 2015;Ubuoh et al, 2021). High dose of Nickel in drinking water has been reported to cause liver, lung and kidney diseases in…”

Niveles de concentración de metales pesados en sedimentos de zona alta del río Locumba, Perú

“…Por lo tanto, es una amenaza inmediata para el ecosistema y la vida humana la bioacumulación de metales pesados. En los ecosistemas acuáticos el ingreso de los metales pesados es muy dañino y llegan a un punto en el que no son biodegradables, pudiendo contaminar aguas subterráneas y superficiales (Attah et al, 2021). La gran demanda del recurso hídrico y la escasez de suministros de agua -sumadas a las actividades humanas que contaminan el ambiente-nos indica la importancia de monitorear la calidad de agua mediante sedimentos del río, particularmente para gestionar el uso de agua (Priti and Biswajit, 2016).…”