Potentially toxic elements in some fresh water bodies in Ethiopia

Mekonnen, Kebede Nigussie; Ambushe, Abayneh A.; Chandravanshi, Bhagwan Singh; Abshiro, M. R.; McCrindle, Robert

doi:10.1080/02772248.2012.744024

Cited by 12 publications

(2 citation statements)

References 21 publications

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“…Although a gradual decline in water quality has been observed in the Central Rift Valley Lakes Basin of Ethiopia (CRVLBE) due to the recent increase in anthropogenic activities, stringent measures are required by the concerned agencies to control the levels of potentially toxic elements in various water bodies. 12 Consumption of onions in CRVLBE contributes to the daily dietary requirement of many important metals, including major (Na, K, Ca, and Mg) and trace (Cu, Co, Cr, Mn, and Zn). The absence of lead (Pb) in the contaminated irrigation water and onion bulbs indicates that Ethiopian onions from Meki Town, which is part of the CRVLBE, either have very low levels of Pb (less than 0.5 mg/kg) or may be completely free of this element.…”

Section: Introductionmentioning

confidence: 99%

Waste Water Management in Wet Coffee Processing Mills and their Impact on the Water quality status of Gidabo River and its Tributaries, Southern Ethiopia

Ulsido,

Geleto,

Berego

2024

Environ�Health�Insights

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The Gidabo River and its tributaries are the main sources of water for more than 1,584,646 inhabitants. It is an important source of water for the surrounding rural communities for various uses such as domestic, irrigation, livestock watering, fishing, and recreation. The river is the main tributary of Lake Abaya. The present study was designed to investigate the water quality status of the Gidabo River and its tributaries for domestic and aquatic life. To assess the water quality status, water samples were collected in monthly intervals for a period of 3 months from September to November (coffee processing time), 2022. Arc GIS 9.3, 3 DEM, and spreadsheet were used to analyze the data collected from SRTM (Shuttle Radar Thematic Mapper, 90 m) and field observation. Of all the water quality parameters analyzed; turbidity, BOD5, DO, COD, pH, Ni, Fe, NO3−, and PO43− were higher than the recommended limits of national and international standards for aquatic life. Based on the Weighted Arithmetic Mean (WAM), Water Quality Index (WQI) calculations of the River, WQI value of the river ranges between 34.83 and 54.31 in different reaches of the watershed which is classified under bad category. The wet coffee processing industry which is the main sources of contamination in the watershed uses 63 L of processing water to produce 1 kg of green coffee beans. Traditional lagoons, with an average hydraulic retention time (HRT) of 1.99 days, are the most common methods of treating wastewater. The river is at higher risk from harmful anthropogenic activities in the watershed and requires urgent monitoring and mitigation to prevent further degradation.

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Section: Introductionmentioning

confidence: 99%

Waste Water Management in Wet Coffee Processing Mills and their Impact on the Water quality status of Gidabo River and its Tributaries, Southern Ethiopia

Ulsido,

Geleto,

Berego

2024

Environ�Health�Insights

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“…Studies have also been carried out on the status of selected metals in Rift Valley soil [11] and environmental problems and water resources utilization of the area [12]. Recently studies have also been conducted on fluoride exposure through food and beverages [13,14] and khat chewing leaves [15] and on the levels of metals in irrigation waters in Ethiopia [16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Correlation among fluoride and metals in irrigation water and soils of Ethiopian Rift Valley

Gizaw¹,

Chandravanshi²,

Zewge³

2014

Bull. Chem. Soc. Eth.

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ABSTRACT. The levels of fluoride and selected metals in Ethiopian Rift Valley soils and irrigation water in the nearby sources were determined by fluoride ion selective electrode and flame atomic absorption spectrophotometer, respectively. The pH, conductivity, salinity and total dissolved solids in water and soil samples were also determined. Accuracy of the optimized procedure was evaluated using standard addition (spiking) method and an acceptable percentage recovery was obtained. The fluoride concentrations in water samples were found in the range of 0.14-8.0 mg/L which is below the WHO limit of fluoride concentration for irrigation (less than 10 mg/L). The water soluble and total fluorides in soil were 2.3-16 µg/g and 209-1210 µg/g, respectively and are within the ranges recommended by FAO and WHO. The range of metal concentration in soil samples (µg/g dry weight basis) and in water samples (mg/L) respectively were: Na (684-6703, 8.6-67), Mg (1608-11229, 23-67), K (1776-4394, 1.1-20), Ca (7547-22998, 17-267), Cr (9.8-79, 0.07-0.17), Mn (143-700, 0.05-37), Co (50-112, 0.35-1.5), Ni (446-1288, 0.27-41), Fe (12180-32681, 6.0-48), Cu (8.9-45, 0.09-0.25) and Zn (31-89, 0.14-0.56). Fluoride was found to have significant correlation with major trace metals (Fe, Cu and Cr), but the correlation with other trace metals was not significant.

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Organochlorine, organophosphorus, and carbamate pesticide residues in an Ethiopian Rift Valley Lake Hawassa: occurrences and possible ecological risks

WM-Bekele,

GirmaTilahun,

Dadebo

et al. 2024

Environ Sci Pollut Res

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Potentially toxic elements in some fresh water bodies in Ethiopia

Cited by 12 publications

References 21 publications

Waste Water Management in Wet Coffee Processing Mills and their Impact on the Water quality status of Gidabo River and its Tributaries, Southern Ethiopia

Waste Water Management in Wet Coffee Processing Mills and their Impact on the Water quality status of Gidabo River and its Tributaries, Southern Ethiopia

Correlation among fluoride and metals in irrigation water and soils of Ethiopian Rift Valley

Organochlorine, organophosphorus, and carbamate pesticide residues in an Ethiopian Rift Valley Lake Hawassa: occurrences and possible ecological risks

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