Distribution and ecological risk assessment of trace metals in surface sediments from Akaki River catchment and Aba Samuel reservoir, Central Ethiopia
Alemnew Berhanu Kassegne,Alemnew Berhanu Kassegne,Tarekegn Berhanu Esho,Jonathan O. Okonkwo,Seyoum Leta Asfaw +4 more
TL;DR: In this paper, the authors investigated spatial distribution, seasonal variations and ecological risk assessment of selected trace metals (Cd, Cr, Cu, Fe, Mn, Pb, Ni and Zn) in the surface sediments from Akaki River catchment and Aba Samuel reservoir, Central Ethiopia.
read more
Abstract: Due to fast urban expansion and increased industrial activities, large quantities of solid and liquid wastes contaminated by trace metals are released into the environment of the Addis Ababa city, most often untreated. This study was conducted to investigate spatial distribution, seasonal variations and ecological risk assessment of selected trace metals (Cd, Cr, Cu, Fe, Mn, Pb, Ni and Zn) in the surface sediments from Akaki River catchment and Aba Samuel reservoir, Central Ethiopia. Twenty-two surface sediment samples were collected, digested using the Mehlich-3 procedure and analyzed quantitatively using inductively coupled plasma optical emission spectrometer. The trace metals occurred in varying concentrations along the course of the sampling stations. The decreasing order of trace metal concentrations in the dry season was: Mn > Fe > Pb > Cr > Zn > Ni > Cu > Cd and in the rainy season was Mn > Fe > Pb > Cr > Ni > Zn > Cu > Cd. Little Akaki River contained a higher load of trace metals than the other regions, which is due to the existence of most of the industrial establishments and commercial activities. Relatively lower levels of trace metals were recorded at Aba Samuel reservoir due to the lower residence time of the sediment (reservoir rehabilitated recently). Ecological risk assessment using USEPA sediment guidelines, geo-accumulation index, contamination factor and pollution load index revealed the widespread pollution by Cd and Pb. These were followed by Mn, Ni and Zn. The concentrations of Pb, Cd, Mn, Ni and Zn in sediments were relatively greater and at levels that may have adverse biological effects to the surrounding biota. Therefore, regular monitoring of these pollutants in water, sediment and biota would be required.
read more
Chat with Paper
AI Agents for this Paper
Find similar papers on Google Scholar, PubMed and Arxiv
Write a critical review of this paper
Analyze citations of this paper to find unaddressed research gaps
Citations
Assessing pollution profiles along Little Akaki River receiving municipal and industrial wastewaters, Central Ethiopia: implications for environmental and public health safety.
TL;DR: In this paper, the authors identify sources, evaluate the levels of river water pollution, and its implications for environmental and public health in the Little Akaki River in Addis Ababa, Ethiopia.
55
Evaluating ecological risks and tracking potential factors influencing heavy metals in sediments in an urban river
TL;DR: In this paper, the average concentrations of As, Cd, Cr, Cu, Hg, and Zn were significantly higher than their background values in soils in the region, and mainly gathered at 0-120 cm in depth in the upstream, 0-60 cm in the midstream, and 0-20 cm downstream.
Impacts of Surface Water Quality in the Awash River Basin, Ethiopia: A Systematic Review
TL;DR: In this paper , the authors systematically summarized current research on water quality issues in the Awash River Basin to generate comprehensive information that captures the water quality status of the river and impacts of water contamination, and identify information and management gaps.
30
A Synthesis of Surface Water Quality in Awash Basin, Ethiopia
TL;DR: In this article , the Awash river and its tributaries are used for domestic, irrigation, industrial, and recreational purposes, and the surface water quality impairment is severe in the upper Awash basin where more than 90% of Addis Ababa's industries discharge their waste into nearby waterways without treatment.
15
Assessment of trace metals in water samples and tissues of African catfish (Clarias gariepinus) from the Akaki River Catchment and the Aba Samuel Reservoir, central Ethiopia
TL;DR: Concentrations of Cd, Cr, Cu, Fe, Mn, Ni, Pb and Zn were determined in water and muscle of Clarias gariepinus from the Akaki River Catchment and the Aba Samuel Reservoir in Ethiopia during 2016 and 2017 as discussed by the authors.
14
References
An ecological risk index for aquatic pollution control.a sedimentological approach
TL;DR: In this article, a sedimentological risk index for toxic substances in limnic systems should at least, account for the following four requirements: the following: the quality of the sediment, the water quality, the sediment quality, and the sediment diversity.
8.2K
Distribution of the Elements in Some Major Units of the Earth's Crust
Karl K. Turekian,K. H. Wedepohl +1 more
TL;DR: A table of abundances of the elements in the various major units of the Earth's lithic crust with a documentation of the sources and a discussion of the choice of units and data is presented in this article.
5.4K
Incidence of adverse biological effects within ranges of chemical concentrations in marine and estuarine sediments
TL;DR: In this article, matching biological and chemical data were compiled from numerous modeling, laboratory, and field studies performed in marine and estuarine sediments, and two guideline values (an effects range low and an effects range median) were determined for nine trace metals, total PCBs, two pesticides, 13 polynuclear aromatic hydrocarbons (PAHs), and three classes of PAHs.
4.2K
Development and evaluation of sediment quality guidelines for Florida coastal waters.
TL;DR: The weight-of-evidence approach to the development of sediment quality guidelines (SQGs) was modified to support the derivation of biological effects-based SQGs for Florida coastal waters, which were demonstrated to provide practical, reliable and predictive tools for assessing sediment quality.
Metal contamination of farming soils affected by industry
TL;DR: Tests revealed elevated contents of cadmium, lead, arsenic, antimony and mercury in farming soils of Suszec commune, which pointed to metal depletion in the soil.
920