scholarly journals Bioaccumulation of zinc, lead, cadmium in water hyacinth, hippo grass and papyrus reed as water quality indicator in River Kisat in Kisumu County, Kenya

2021 ◽  
Vol 2 (2) ◽  
pp. 100-107
Author(s):  
B Mareri ◽  
E Kitur ◽  
P Obade
Keyword(s):  
Water Quality ◽  
Heavy Metal ◽  
Quality Indicator ◽  
Water Hyacinth ◽  
Heavy Metal Contamination ◽  
Common Source ◽  
Mean Values ◽  
Water Quality Indicator ◽  
Standard Procedures ◽  
Poor Water Quality

River Kisat in Kenya is increasingly being polluted serving as a sink for waste receiving effluent from sewerage, industrial waste and agricultural pesticide residues leading to heavy metal contamination. This has led to the contamination of the aquatic ecosystem and water used by communities for consumption and farming. Little information is available on the bio-indicative aspects of water quality using bioaccumulation factor by macrophytes. This study aimed at determining concentrations of Zn, Pb and Cd in water, (Eichhornia crassipes (water hyacinth), Vossia cuspidata (hippo grass), Cyperus papyrus (papyrus reed) and bioaccumulation factors (BAF) in River Kisat, Kisumu County. This was determined following laboratory standard procedures using Atomic Absorption Spectrophotometer (AAS). Results showed mean concentrations (mg/L) of Cd (Below detectable limit), Zn (0.2 -0.15) and Pb (0.03-0.03) in water. Mean values were within allowable WHO drinking water limits except for Pb which was above acceptable limits. Zn recorded highest accumulated levels in E. crassipes (72.43mg/L), C. papyrus (70.13mg/L) and V. cuspidate (71.03mg/L). E. crassipes was observed to bioaccumulate the highest concentration of the heavy metals with C. papyrus bioaccumulating the lowest (E. crassipes > V. cuspidata> C. papyrus). Pearson matrix correlation analysis showed positive significant correlations (r = 0.621; p = 0.027) between Zn and Pb in water and the macrophytes which reflected a common source of pollution and indication of accumulation. BAF recorded for all macrophytes ranged from 2.45 to 6.85, above value of 1, indicating significant bioaccumulation for Zn and Pb. The findings from this study showed higher concentrations of Zn and Pb in the macrophytes in comparison to the water in River Kisat with BAF values >1 indicating bioaccumulation which represented poor water quality. The study recommends local authorities employ monitoring processes with incorporation of BAF as a water quality indicator where low metal concentrations in water are recorded, introduce penalties for polluters and sensitize local inhabitants on detrimental health effects of heavy metal and avoid use of River Kisat water for agricultural activities.

scholarly journals Pepper mild mottle virus as a water quality indicator

2018 ◽  
Vol 1 (1) ◽  
Author(s):  
Masaaki Kitajima ◽  
Hannah P. Sassi ◽  
Jason R. Torrey
Keyword(s):  
Water Quality ◽  
Quality Indicator ◽  
Mottle Virus ◽  
Pepper Mild Mottle Virus ◽  
Water Quality Indicator

Hybrid soft computing approach for determining water quality indicator: Euphrates River

2017 ◽  
Vol 31 (3) ◽  
pp. 827-837 ◽  
Author(s):  
Jing Li ◽  
Husam Ali Abdulmohsin ◽  
Samer Sami Hasan ◽  
Li Kaiming ◽  
Belal Al-Khateeb ◽  
...  
Keyword(s):  
Water Quality ◽  
Soft Computing ◽  
Quality Indicator ◽  
Euphrates River ◽  
Water Quality Indicator ◽  
Computing Approach

scholarly journals SOFTWARE FOR CALCULATING A WATER QUALITY INDICATOR SPECIFIC TO THE AMAZON REGION

2021 ◽  
Vol 9 (3) ◽  
pp. 248-261
Author(s):  
A. M. F. de Souza ◽  
S. F. P. Pereira ◽  
L. P. Santos ◽  
C. S. e Silva ◽  
R. M. Rocha ◽  
...  
Keyword(s):  
Water Quality ◽  
Quality Indicator ◽  
Quality Parameters ◽  
Web Interface ◽  
Natural Ecosystems ◽  
Water Quality Indicator ◽  
Oxidation Reduction ◽  
Oxidation Reduction Potential

The quality of the water in the Amazon's reservoirs is of fundamental importance for natural ecosystems, biota, and for the region's population. Maintaining the water quality involves long-term monitoring programs established by the requirements of Brazilian legislation. A web interface may facilitate the use of monitoring results routinely, which allows periodic insertion of previously selected water quality parameters results, to finally provide a simple and direct way to evaluate the water quality. The general objective of this study was to develop a software based on a water quality indicator (WQI) system considering chemical, physical-chemical, and biological parameters evaluated in four seasonal periods in Samuel dam. Multivariate analysis was used to select 10 significant variables (oxidation-reduction potential, dissolved oxygen, total dissolved solids, chlorophyll a, phosphate, Ba, Ca, Fe, Na, and Sn). The web software added innovation to the project, enabling to storage of data from analysis of field-collected samples in an organized and safe way in a database, in addition to speeding up the calculation of the WQI, making it possible to classify the water quality more quickly and accurately.

Perspectives of using the water hyacinth (Eichhornia heterosperma) for self-purification in a Colombian water reservoir

2020 ◽  
Vol 193 (4) ◽  
pp. 347-357
Author(s):  
Stephan Eckert ◽  
Heazel Grajales ◽  
Jaime B. Palacio ◽  
Luz Jimenez F. Segura ◽  
Elisabeth Pohlon
Keyword(s):  
Heavy Metal ◽  
Water Hyacinth ◽  
Heavy Metal Contamination ◽  
Plant Cover ◽  
High Capacity ◽  
Water Reservoir ◽  
Dry Weight ◽  
Degradation Process ◽  
Plant Parts ◽  
Nitrogen Concentrations

Eutrophication and heavy metal contamination of freshwater reservoirs cause serious problems world- wide. With increasing nutrient levels in lakes and reservoirs, invasive macrophytes like the perennial water hyacinth Eichhornia spp. can intensify the degradation process, but the plants can also be supporting because of their high capacity for heavy metal and nutrient accumulation. In this study, we assessed the potential of E. heterosperma for nutrient removal. Therefore, we measured nutrient and heavy metal concentrations in the water and the plant tissue of E. heterosperma plants harvested in a hypereutrophic reservoir (Porce II, Antioquia, Colombia). We found mean nitrogen concentrations between 21–45 g and phosphorus between 2.1–3.0 g kg –1 dry weight in the different plant parts (leaves, stems, roots). Regarding metals, we measured 3.1–2;37 mg chrome, 62 mg–7.4 g aluminium, 22–70 mg zinc, 12–95 mg copper, and 0.4–1.3 g manganese per kg of dry weight. This exceptional high ability for nutrient and heavy metal uptake makes Eichhornia heterospermaan appropriate candidate for bioremediation in reservoirs. Therefore, we assessed the potential of the plants as fertilizer for forests and agriculture regarding the heavy metal accumulations. We found that the harvest of 1.0 km² of plant cover in Porce II would result in a removal of 4.3 % phosphorus and 4.0 % nitrogen of the nutrients in the water column. This indicates that for hypereutrophic lakes with an annual input of about 43443 t N and 2490 t P, the remediation capacity of this plant is limited.

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