Phytoplankton Composition and Physico-Chemical Parameters Study in Water Bodies of Abijata-Shalla Lakes National Park (ASLNP), Ethiopia (original) (raw)
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chemistry and materials research, 2016
Samples were collected from Lake Hawassa, from six selected sampling sites. The measured physico-chemical parameters in lake water ranged pH(7.70-8.69), TDS(437-495 mg/L), EC(0.729-0.825 mS/cm), DO(6.2-14.6 mg/L), Temp.(20.7-23.4 0 C), Turb.(6.3-26.7 NTU), SO 4 2- (25-16), Cl - (42-23), F - (17.4-5.36), NO 3 -N (2.38-11.79), PO 4 3- (0.81-1.55), COD(219-1216), and BOD 5 (104-590) mg/L. The concentration of detected metals in water samples were in the range Cu(0.226-0.117), Mn(0.166-0.068), Zn(0.253-0.145), Mg(35.91–14.27), Ca(57.11-35.23), Na(87.49-87.49) and K(73.02-34.26) in mg/L. According to stream and potable waters standard recommendation, the maximum value of BOD 5 , COD, PO 4 3- and F - were above the acceptable range. The detectable metal concentration in water samples analyzed were Na>Ca>K>Mg>Zn>Cu>Mn. The concentration of Mn in the present study was above USEPA but below WHO guideline. The dendrogram figure shows that metal parameter of water samples at ...
Phytoplanktonic dominant algae determined in Beysehir Lake were Oscillatoria sp., Cladophora sp., Achnanthes sp., Gomphonema sp., Navicula sp., Cosmarium sp., Cymbella sp., Fragilaria sp., Oocystis sp., Spirogyra sp., Diatomae sp., Microcystis sp. and Staurastrum sp. While in Mogan Lake, Spirogyra sp., Zygnema sp., Euglena sp., Achnanthes sp., Cymbella sp., Fragilaria sp. Navicula sp., Scenedesmus sp., Oocystis sp., Synedra sp., Oscillatoria sp., Chlorella sp., Cosmarium sp. and Nitzshia sp. were determined. Zooplanktonic dominant organisms determined in Beysehir Lake were Eudiaptomus drieshi, Daphnia longispina and Brachionus calyciforus while Arctodiaptomus sp., Keratella quadrata, Filinia longiseta and Diaphanosoma lacustris were determined in Mogan Lake. Accumulation of heavy metals (Cd, Pb, Hg and Cr) in the water and plankton of Beysehir and Mogan Lakes was studied seasonally, from April 2000 to December 2004. Higher concentration with all heavy metals was recorded in plankton. Mercury (Hg) was found in lowest and lead (Pb) in the highest correlation; however, the concentration of each metal varied seasonally. In addition, the seasonal changes in phytoplankton and zooplankton populations and species abundance were also determined. Some physical-chemical parameters of water and their correlation with heavy metals were also examined.
DESALINATION AND WATER TREATMENT
In this study, the level of water pollution in Lake Terkos, one of the important drinking water resources of Istanbul Metropolitan, was examined by determining the phytoplankton distribution, some physicochemical parameters, nutrients and heavy metal concentrations. For this purpose, samples were collected from eight sampling stations in March and September from the surface water. 34 taxa, from 8 divisions were categorized as Bacillariophyta (17), Charophyta (2), Chlorophyta (5), Cryptophyta (1), Cyanobacteria (5), Euglenozoa (2), Miozoa (1) and Ochrophyta (1). The habitat of blue-green algae Anabaena spiroides (Klebahn), which was found to be dominant in Lake Terkos, was identified as eutrophic as well as stratified signifying shallow lakes with low nitrogen content. Recording high reproduction of Anabaena spiroides particularly in autumn demonstrated that the characteristics of the lake was altering from mesotrophic to eutrophic. The measured heavy metal concentrations denote that the Lake Terkos was extremely polluted by some metals/ metalloids. Particularly boron (B) and cadmium (Cd) concentrations show a class of 4 water quality. Since it fulfills the demand for drinking water in Istanbul to a large extent, it is crucial to take measures to improve the water quality of Lake Terkos urgently. Also it is considered that, limnological monitoring studies must be carried out continuously at the lake for controlling the water quality.
New York Science Journal , 2013
Bardawil Lake has a great economic and global reputation because of its production from high-quality fish which is exported to Europe. So it is important to follow-up water and soil properties and quality of the fish, so as not to suffer this lake like the rest of other Egyptian lakes from the deterioration of water quality and fish product quality. The lake has been divided into 12 terminal sites for periodic sampling (monthly) of water. Field analyses was done during the samples collection and then transported to the laboratory in plastic containers inside Ice Box for analyses. The most important results obtained are as follows: Differences in temperature between the studied sites were changed due to the time of sampling, only the differences between months were statistically significant. The differences among the sites in the pH values of the sampled water at the same month low either among months were significantly different. There are no significant differences (P>0.05) among seasons in the same locations. The obtained results showed an oncrease in dissolved oxygen due to the water exchange between the Mediterranean Sea and the lake which increase the oxygen concentration. Tulul (site 6) showed a significant decrease (P<0.05) in oxygen concentration due to the absence of water exchange between the site and the sea as well as the decomposition of organic compounds that consume oxygen. The highest values of dissolved oxygen concentration was recorded in winter season at all studied sites. The movement of water exchange between the Mediterranean Sea and the lake has an important role in improving the water quality in the lake water, especially pH, dissolved oxygen, salinity, the content of nutrients and chlorophyll ″a″. As for heavy elements in the water are regarded as Lake Bardawil best lakes in the world for free from contaminants in general, and especially of heavy elements. It was observed that the iron is the more focused elements, followed by zinc, manganese and copper, but it was less than lead and cadmium concentration. Concentrations of all the studied heavy elements were generally much less than the allowable limits globally. The most important problem facing the lake now is the need to create sufficient radial channels to connect the Mediterranean Sea to the last point in the lake and the need for follow-up clearing operations Boughaz of continuous sedimentation. The study showed that the waters of Bardawil Lake is poor nutritionally, but water is clean and free of contaminants, so we suggest the need to work on the development of natural food out and add safe fertilizer food to improve water quality and increase fish production and crustaceans and the organization of traffic exchanges waterway between the Mediterranean Sea and the lake to cover all bodies of water in the lake.
Water Air and Soil Pollution, 2008
The relationships between heavy metal concentrations and physico-chemical properties of natural lake waters and also with chemical fractions of these metals in lake sediments were investigated in seven natural lakes of Kumaun region of Uttarakhand Province of India during 2003–2004 and 2004–2005. The concentrations of Cr, Mn, Fe, Ni, Cu, Zn, Cd and Pb in waters of different lakes ranged from 0.29–2.39, 10.3–38.3, 431–1407, 1.0–6.6, 5.3–12.1, 12.6–166.3, 0.7–2.7 and 3.9–27.1 μg l−1 and in sediments 14.3–21.5, 90.1–197.5, 5,265–6,428, 17.7–45.9, 13.4–32.0, 40.0–149.2, 11.1–14.6 and 88.9–167.4 μg g−1, respectively. The concentrations of all metals except Fe in waters were found well below the notified toxic limits. The concentrations of Cr, Mn, Ni, Cu, Zn, Cd and Pb were positively correlated with pH, electrical conductivity, biological oxygen demand, chemical oxygen demand and alkalinity of waters, but negatively correlated with dissolved oxygen. The concentrations of Cr, Ni, Zn, Cd and Pb in waters were positively correlated with water soluble + exchangeable fraction of these metals in lake sediments. The concentrations of Zn, Cd and Pb in waters were positively correlated with carbonate bound fraction of these metals in lake sediments. Except for Ni, Zn and Cd, the concentrations of rest of the heavy metals in waters were positively correlated with organically bound fraction of these metals in lake sediments. The concentrations of Cr, Mn, Ni, Cu and Zn in waters were positively correlated with reducible fraction of these metals in lake sediments. Except for Cd, the concentrations of rest of the metals in waters were positively correlated with residual fraction and total content of these heavy metals in lake sediments.
Background: Pollution from a single, easily identifiable source, such as an industrial facility or sewage treatment plant, is referred to as point-source pollution. Nonpoint-Source pollution is contamination that originates from multiple sources rather than just one. Lake Ziway is one of the Ethiopian Rift Valley lakes that have been impacted by both anthropogenic and natural activities. Large-scale projects, domestic waste influents, pesticide use that wasn't foreseen, industrial and domestic wastes, etc. are a few of the factors contributing to the pollution. Objective: The goal of this study was to determine the current concentrations of a few specific heavy metals and physicochemical components in the water of Lake Ziway (Ethiopia) as a result of point and nonpoint influent discharges. Method: The physico-chemical parameters including electrical conductivity, total dissolved solids, pH, turbidity, ammonia, nitrites, nitrates, phosphates, sulfates, and total hardness were investigated using the Palin test photometer, while the Cr, Pb, and Ni concentrations in collected water samples were determined using the Flame Atomic Absorption Spectroscopy (FAAS). Result: Phosphorus, turbidity, chemical oxygen demand, biochemical oxygen demand, magnesium, calcium, chromium, lead, and nickel are just a few of the parameters that were over the standard limit values at location "A", and they are also revealed to be above the standard limit values at site "B" and site "C" chromium, nickel, and zinc requirements are higher than recommended by WHO standards. Conclusion: In this article we investigated the levels of some heavy metals, i.e. chromium, lead, nickel, Zinc and physicochemical paramters including BOD, COD, PH, total dissolved solids, turbidity, nitrates, phosphates, and total hardness. The expansion of large-scale investment projects, such as irrigation-based agricultural development activities, floriculture industries, unplanned use of agrochemicals, domestic waste influents from Ziway/Batu town, and rivers like the Meki Rivers in Meki town (about 30 km far from Ziway) that flow into Lake Ziway carry contaminated discharge from industrial and domestic sources, are currently putting pressure on Lake Ziway.
This study aims to quantify the pollution levels in the main Lakes of El Kala National Park; Mellah, Oubeira, and Tonga, which constitute an important source of water supply and a National Heritage according to Ramsar convention, by monitoring five heavy metals (Al, Cr, Zn, Cu, Pb) and the phosphates content. This park contains up to 33% of the population of El Kala district, which liquid wastes are discharged directly in the lakes ecosystem. Results revealed that the Aluminum is present in the three Lakes, Lead was detected in the lakes of Oubeira and Mellah, Zinc and Cr were inexistent in the three lakes, Copper was detected only in Oubeira Lake. Phosphates were present in three lakes with a maximal content of 6 mg/l. This value remains superior to the limit content of phosphates for a lake eutrophication (0.2 mg/l). This situation threatens seriously the Lakes water quality and then its ecosystem.
Biomonitoring of heavy metals pollution in Lake Burullus, Northern Delta, Egypt
African Journal of Environmental Science and Technology, 2015
Aquatic macrophytes and benthos are unchangeable biological filters and they carry out purification of the water bodies by accumulating dissolved metals and toxins in their tissues. In view of their potential to entrap several toxic heavy metals, 3 groups of benthos and 6 macrophytes (submerged species: Potamogeton pectinatus, Ceratophyllum demersum and Najas armata); (floating species: Lemna gibba and Eichhornia crassipes root and shoot) and (emergent species: Phragmites australis shoot) were collected from 15 different locations on Lake Burullus and analyzed for determination of 6 heavy metals (Fe, Zn, Ni, Cu, Pb and Cd) contenets. The study was aimed at understanding the importance of these benthos and macrophytes in accumulation of toxic metals and suggesting preservation and restoration of Lake Burullus ecosystem. The distribution of the investigated metals in water, sediments, benthos and aquatic plants of the lake showed that, the eastern and eastern southern parts of the lake have generally higher concentrations of heavy metals than the western and middle one. Potamogeton pectinatus showed high contents of Pb, Cd and Zn respectively. On the other hands Eichhornia crassipes showed high level of copper while in Ceratophyllum demersum high concentration of Iron was detected. The present study reveals that the aquatic macrophytes and benthos play a very significant role in removing of the different metals from the aquatic environments and they probably reduced the effect of high concentrations of these metals on the lake ecosystem. Bioaccumulation factor values showed that the trend of accumulation of most metals in the benthos was as follows: Mullusca > Arthropoda > Annelida > and in aquatic plants as: Lemna gibba> Potamogeton pectinatus > Ceratophyllum demersum > Eichhornia crassipes Root > Najas armata>phragmites australis shoot> Eichhornia crassipes shoot, which make them suitable candidates to be used in biomonitoring surveys as a good tools for heavy metal pollution markers, in the biological treatment of the polluted water and in sustainable development of Lake Burullus.
Assessment of heavy metals concentrations in water, plankton and fish of Lake Manzala, Egypt
Egyptian Journal of Aquatic Biology and Fisheries, 2009
he levels of some heavy metals (Cu, Zn, Cd, Pb) were determined in water, plankton and fish (Liza aurata) collected from five sites in Lake Manzala. Metals in water and fish exhibited a significant seasonal and regional variations in which all metals attained their maximum values during summer, while the lowest level was reported during winter. The accumulation of different metals in water, plankton and fish tissues followed the order Zn> Cu> Pb> Cd. The mean concentrations of the tested metals in water were: Cu (0.055), Zn (0.311), Cd (0.020) and Pb (0.022) mg/l. Cd level in water was found to be higher than the permissible limit recommended for drinking water. Metals in plankton were much higher than those in water and fish. Gills of the examined fish contained the highest concentrations of all the measured metals, while muscles retained the lowest levels. In spite of the contamination of Lake Manzala by such heavy metals, the levels of these metals in the edible fish muscle did not exceed the recommended permissible limits and thus are considered safe for human consumption.
DESALINATION AND WATER TREATMENT, 2021
In this work, the experiments related to seasonal variations of phytoplankton composition and heavy metal contamination along with some water quality parameters were carried out throughout the channel, serving as a waterway between Lake Küçükçekmece and the Sea of Marmara. Considered as a Class B wetland, the lake has been stayed within the metropolitan area of Istanbul overtime. The samples from the surface water were taken monthly by using Nansen bottles at 5 sampling sites through the period of March–November. After experimental procedures, a total of 46 taxa were recorded belonging to Bacillariophyta (20), Charophyta (4), Chlorophyta (6), Cryptophyta (1), Cyanobacteria (4), Euglenozoa (3), and Miozoa (8) divisions. The phytoplankton densities were found to be varied from 76 individual cm–3 to 3,283 individual cm–3 throughout the channel and the variation for chlorophyll-a contents was between 0.99–55.32 mg m–3. From our results, the heavy metal and nutrient concentrations were f...