Status of Heavy Metal Contaminations of Lake Water of Dhaka Metropolitan City

2013 ◽  
Vol 5 (2) ◽  
pp. 345-348 ◽  
Author(s):  
MAA Mokaddes ◽  
BS Nahar ◽  
MA Baten
Keyword(s):  
Water Pollution ◽  
Heavy Metal ◽  
Chemical Analysis ◽  
Natural Resources ◽  
Lake Water ◽  
Water Samples ◽  
Ph Value ◽  
Central Laboratory ◽  
Metropolitan City

A study was conducted to evaluate level of water pollution and its influence on heavy metal contaminations of lake water of Dhaka metropolitan city. The water samples were collected from lakes of Dhaka metropolitan city during February to March, 2008. The chemical analysis of water samples included pH, EC, As, Cu, Mn, 'ln. Pb and Cd. Analysis of lake water samples was done at the Central Laboratory of Bangladesh Agricultural University, Mymensingh. The concentrations of heavy metal of lake water were recorded as: in case of pH = 6.95, in case of EC = 22.44 (?scm-1), in case of Cu = 0.018 ppm, in case of Zn = 0.274 ppm, in case of Mn = 0.084 ppm, in case of As = 0.002 ppb, in case of Pb = 0.002 ppm and in case of Cd = 0.044 ppm. The pH value of lakes water range from 5.34 to 7.68, an indication of slightly acidic to alkaline in nature. The average EC value for lakes water ranged from 17.61 to 34.61 ?Scm-1 where EC value varied from 14.24 to 33.48 ?Scm-1 in the lake water.DOI: http://dx.doi.org/10.3329/jesnr.v5i2.14841 J. Environ. Sci. & Natural Resources, 5(2): 345-348 2012

scholarly journals Status of Heavy Metal Contaminations of Drain Water of Dhaka Metropolitan City

2013 ◽  
Vol 5 (2) ◽  
pp. 11-14
Author(s):  
MAA Mokaddes ◽  
BS Nahar ◽  
MA Baten
Keyword(s):  
Heavy Metal ◽  
Water Samples ◽  
Potable Water ◽  
Ph Value ◽  
Living Organism ◽  
Drainage Water ◽  
Drain Water ◽  
Metropolitan City ◽  
The Status ◽  
The Mean

A study was conducted to evaluate the status of heavy metal contaminations of drainage water of Dhaka Metropolitan City. The water samples were collected from four major drains of Dhaka metropolitan city during February to March, 2008. The chemical analysis of water samples (pH, EC, As, Cu, Mn, 'ln. Pb and Cd) was conducted at the Central Laboratory of Bangladesh Agricultural University, Mymensingh. The chemical concentrations of drain water were: in case of pH = 5.13, in case of EC = 33.36 (?scm-1), in case of Cu = 0.129 ppm, in case of Zn = 1.276 ppm, in case of Mn = 0.109 ppm, in case of As = 0.036 ppb, in case of = Pb 0.004 ppm, and in case of Cd = 0.228 ppm. The average pH value of drain water ranged from 4.96 to 5.34 and the mean was 5.138, which was an indicating of strong acidic in nature. The mean EC value of drainage water was recorded 33.363 ?Scm-1, all the water samples indicated low to medium salinity. According to drinking water (Potable water) and public water standard, Mn, and Cd toxicity were detected in drain water. According to WHO for aquaculture standard Mn and Cd were harmful level for all living organism. Some water were found unsuitable due to higher concentration of Mn over the recommended limit but other ions like Zn, As, and Pb were within the safe limit.DOI: http://dx.doi.org/10.3329/jesnr.v5i2.14566 J. Environ. Sci. & Natural Resources, 5(2): 11-14 2012

Status of Heavy Metal Contaminations of River Water of Dhaka Metropolitan City

2013 ◽  
Vol 5 (2) ◽  
pp. 349-353 ◽  
Author(s):  
MAA Mokaddes ◽  
BS Nahar ◽  
MA Baten
Keyword(s):  
Heavy Metal ◽  
River Water ◽  
Water Samples ◽  
Potable Water ◽  
Chemical Properties ◽  
Living Organism ◽  
Low Salinity ◽  
Metropolitan City ◽  
Safe Limit ◽  
Major Chemical

A study was conducted to evaluate the level of water pollution and its influence on the chemical properties of river water of Dhaka metropolitan city. The water samples were collected from forty five locations of Dhaka metropolitan city during February to March, 2008. Analysis of the major chemical contaminations of river water samples containing Cu, Zn, Mn, As, Pb and Cd was conducted at the Central Laboratory of Bangladesh Agricultural University, Mymensingh. The heavy metal concentrations of river water were recorded as in case of Cu = 0.006 ppm, in case of Zn = 0.021 ppm, in case of Mn = 0.075 ppm, in case of As = 0.003 ppb, in case of Pb = 0.002 ppm and in case of Cd = 0.012 ppm, respectively. The pH of river ranged from 6.28 to 7.61. The EC values were 17.61 to 34.61 ?Scm-1, revealed that all the water samples were low salinity and also excellent for irrigation. According to drinking water (Potable water) and public water standard, Mn and Cd toxicity were detected in river water. For aquaculture standard Mn and Cd were found at harmful level for all living organism. Some water were found unsuitable due to higher concentration of Mn over the recommended limit but other ions like Zn, As, and Pb were within the 'safe limit'.DOI: http://dx.doi.org/10.3329/jesnr.v5i2.14842 J. Environ. Sci. & Natural Resources, 5(2): 349-353 2012

scholarly journals Assessment of aquatic genotoxicity of the Lake Sevan basin, Armenia using natural bioindicators

2021 ◽  
Vol 4 ◽  
Author(s):  
Anzhela Sargsyan ◽  
Anna Simonyan ◽  
Galina Hovhannisyan ◽  
Bardukh Gabrielyan ◽  
Rouben Aroutiounian
Keyword(s):  
Water Pollution ◽  
Dna Damage ◽  
Chemical Analysis ◽  
Water Samples ◽  
Primary Concern ◽  
Reference Sites ◽  
The South ◽  
Lake Sevan ◽  
The Republic ◽  
The Village

Water pollution can cause genomic instability, thereby threatening aquatic wildlife and human health․ For a correct assessment of the impact of the mixture of pollutants, chemical analysis of environmental contaminants should be simultaneously applied with genotoxicity assays. The сomet assay is a sensitive, versatile and extensively used method for genotoxicity assessment in a water environment and was successfully applied in aquatic wild species, including fish and crayfish. Earlier we investigated the genotoxicity of waters of the Lake Sevan basin (Simonyan et al. 2016, Simonyan et al. 2019)․ Lake Sevan is the largest lake of the Caucasus Region, situated in the Republic of Armenia, in the Gegharkunik Province. Water pollution in the lake is a result of both anthropogenic and natural pressures. A combination of comet assay (Tice et al. 2000) and chemical analysis was applied for evaluation of water genotoxicity using gibel carp Carassius auratus gibelio and crayfish Astacus leptodactylus as sentinel organisms. Fish and water samples were collected from the south–southwest of the village Shorzha (40028′33″N and 45014′22″E), Peninsula of Lake Sevan (40033′46″N and 45001′37″E), the estuaries of the Rivers Gavaraget (40025′12″N and 45009′53″E) and Dzknaget (40036′55″N and 44058′13″E). Сrayfish and water samples were collected from the estuary of the River Masrik (40013′25″N and 45038′21″E) and near the villages of Artanish (40027′19″N and 45025′12″E) and Tsapatakh (40024′34″N and 45028′22″E). According to the chemical analysis of waters, the south–southwest of the village Shorzha and the estuary of the River Masrik were chosen as reference sites․ The content of contaminants in water was analyzed according to the standard methods in the Environmental Impact Monitoring Center, Ministry of Environment of the Republic of Armenia. The obtained results showed that the levels of DNA damage were significantly higher in both species in polluted areas than in reference sites. A significant positive correlation between DNA damage in C. auratus gibelio and contents of Al, Fe, Cu and Mn in water was shown. DNA damage in A. leptodactylus correlated with Al, Fe, Cu and Mo. C. auratus gibelio and A. leptodactylus were found to be sensitive mostly to the same pollutants, which indicate that these metals may be of primary concern as contaminants of the studied aquatic environment. Thus, the current study indicates that C. auratus gibelio and A. leptodactylus are sensitive bioindicators for monitoring of water pollution in the Lake Sevan basin.

scholarly journals Groundwater Quality Determination from hand-dug wells in Ososo Town, Akoko-Edo North Local Government Area Edo State

2021 ◽  
Vol 40 (3) ◽  
pp. 540-549
Author(s):  
E.G. Maju-Oyovwikowhe ◽  
W.O. Emofurieta
Keyword(s):  
Heavy Metal ◽  
Local Government ◽  
Chemical Analysis ◽  
Ground Water ◽  
Water Samples ◽  
Local Government Area ◽  
Total Alkalinity ◽  
Well Water ◽  
Dug Wells ◽  
Edo State

Groundwater is water beneath the surface of the earth. The primary source is precipitation from rain, snow, and hail. Groundwater commonly occurs as water that fills pore spaces between mineral or rock grains in sediments and sedimentary rocks. This study is to evaluate the physiochemical characteristics and selected heavy metal levels of Water from Hand Dug Wells in Ososo in Akoko Edo Local Government Area of Edo State, Nigeria. A total of twenty (20) water samples were collected in very clean containers from twenty (20) hand dug wells in Ososo town, and taken to the laboratory immediately for physical, chemical and heavy metal analysis using standard laboratory techniques. The physical analysis results from the study show that depth to ground water is very shallow. Ph was below 7.5. Conductivity varies from 167.8-2120.00/cm. The temperatures were uniform. The ground water is odorless and tasteless. The amounts of total suspended soil (TSS) in all the samples vary from 10–20 ppm. The total dissolved solid content (TDS) concentration for all the samples varies from 132–1320.00 ppm. Total hardness is soft to moderately hard. Total alkalinity values vary between 3.0 to 18.0 ppm. The phenolphthalein value for the sample tested was zero. Chemical analysis results for the cations shows that Calcium (Ca) is one of the most abundant cations in the entire well water samples with concentration varying from 6.4 – 40.0 mg/L. Magnesium (Mg) concentration vary from 2.0 -9.5 ppm. Dissolved Sodium (Na) content values vary from 17.9- 92.5 mg/L. Chemical analysis results for the anions shows that the concentration of sulphate (SO4) ions varies from 93–125 mg/L. The bicarbonate (CO3) concentration in all samples varies from 25.7–90 mg/L. The dissolved nitrites and nitrates concentrations varies from 5.7 – 9.1. Heavy metals analysis shows the concentrations of copper (CU) in the samples range from 0.1 – 0.5 mg/l. The result of the analysis indicates high values of lead (Pb) in nine samples, but lead was not detected in wells 6 and 7. The values for other wells ranged between 0.1-0.2 mg/l. The values for the concentration of chromium (Cr)range from 0.4 -0.89 mg/l. The values of barium (Ba) range from 0.05- 0.3 mg/l. Result from the heavy mineral analysis for Cadmium (Cd) gave an approximate value of 0.2 and below detectable limit in the other wells. The values of Zinc (Zn) range from 0.8 – 11.4 mg/l. The values of Nickel (Ni) range from 0.1–0.5 mg/l.The hand-dug wells in the study area contain free Carbon IV Oxide and the alkalinity of the well water is entirely due to Bicarbonate ions. Sodium, chloride, bicarbonates, calcium, iron, potassium and magnesium are the most abundant. All the dissolved anions in the well water sample are generally below the recommended maximum limits by WHO. Samples also showed high bacteria load which primarily originated from effluent discharge from pit toilets and waste dumps and can constitute health risk on ingestion. Highly populated areas have groundwater with high concentration of dissolved ions and the converse for areas of low population. From the results of the analysis, conclusion is drawn to the fact that, the groundwater chemistry in the study area has been influenced greatly by human activities than the bedrock geology of the area. It is therefore recommended that well location should be at least, 30 m away from any source of contamination such as soak- ways, adequate treatment must be given to well water such as chlorination, boiling to destroy any bacteria and filtration to remove all unwanted/undesirable constituents that may be present, and a policy on land use planning and urban development to guard against indiscriminate setting of wells within the centre of the village should be established. This study has been able to enhance sustainable water development, since the health of inhabitants in a community depends to a large extent on the quality of groundwater supply.

scholarly journals Hydro Chemical Analysis and Suitability Determination for Irrigation for Ground Water near Solid Waste Dump Site at Pune

2020 ◽  
Author(s):  
S. A. Nihalani ◽  
S. N. Behede ◽  
A. R. Meeruty
Keyword(s):  
Water Pollution ◽  
Chemical Analysis ◽  
Ground Water ◽  
Solid Waste ◽  
Water Samples ◽  
Monsoon Season ◽  
Waste Dump ◽  
Dump Site ◽  
Piper Diagram ◽  
Post Monsoon Season

Abstract Over exploitation and pollution of groundwater resources is considered to one of the major pollution problems these days. Even pollution of air, surface water or land may have a significant effect on pollution and contamination of ground water. Industries, human activities, agriculture, etc generate waste in various forms like solid, liquid and gas. If all this waste is not treated properly, it shall result polluting the environment and further affecting the quality of ground water due to its hydraulic connectivity with the hydrological cycle. In addition, leachate resulting from municipal or industrial solid waste dump site as well agricultural run-off also leads to ground water pollution. It has been estimated that around 45 million people globally are affected by water pollution resulting from excess iron, fluoride, arsenic, or sea water intrusion. The current study deals with physico-chemical analysis of ground water samples and suitability determination of water by using water quality index and Piper diagram for solid waste dump site near Pune. Water samples were collected from open wells as well as bore wells for pre-monsoon and post monsoon season and results were evaluated using residual sodium carbonate, sodium hazard, sodium adsorption ratio, and piper diagram. It can be inferred that, Ca-Cl type of water predominates the study area for both pre-monsoon as well as post-monsoon season.

Species Density and Lead (Pb) Pollution in Mangrove Ecosystem, South Kalimantan

2020 ◽  
Vol 5 (1) ◽  
pp. 70-81
Author(s):  
Anang Kadarsah ◽  
Dafiuddin Salim ◽  
Sadang Husain ◽  
Marta Dinata
Keyword(s):  
Heavy Metal ◽  
Oil Palm ◽  
Ph Value ◽  
Coal Mines ◽  
Organic Matter Content ◽  
Mangrove Ecosystem ◽  
Organic Content ◽  
Species Density ◽  
Pb Pollution ◽  
Mangrove Ecosystems

Its crucial to get information about lead (Pb) heavy metal pollution from mining and oil palm plantation on species density in mangrove ecosystem, to anticipate its impacts. This study aimed is to compare the types and densities of vegetation in mangrove ecosystems allegedly due to mining in Setarap village, Tanah Bumbu Regency and oil palm plantations in Kuala Tambangan Village, Tanah Laut Regency. We also analysis the condition of waters (TDS, pH and DO) and organic content in sediments to acquire data from the South Kalimantan mangrove ecosystems. The results showed there were four species of true mangroves (Avicennia alba, Acanthus ebracteatus, Nypa fruticans and Rhizophora apiculate) could live well in the environment affected by mining or oil palm plantations. The species density for trees was low (933 ind/ha) for mangroves affected by coal mines, while those affected by oil palm plantations had higher densities (1,067 ind/ha). pH value of waters in affected area by coal mining showed more acidic value (pH 5.76) especially at the back, while those by palm oil plantations are more acidic (pH 6) in the estuary. Organic matter content in sediments affected by coal mines was in the range of 0.61-6.59%, while those affected by oil palm plantations showed higher values (0.12-2.19%). Lead heavy metal content (Pb) in waters affected by coal mines was 0.031-0.056 mg/L, while the area affected by oil palm plantations was of higher value (0.110-0.128 mg/L). Lead (Pb) levels in sediments indicate higher values than waters, which reach 3.512-6.046 mg/Kg (affected by coal mines), and in areas affected by oil palm plantations reaching 6.658-6.66 mg/Kg. The general conclusion is that vegetation densities in areas affected by coal mines are lower than oil palm plantations. The level of lead  (Pb) pollution in the sediments is higher than in the waters.

Nitrogen-doped carbon dots from Hutai-8 grape skin and their application in Hg2+ detection

2020 ◽  
Vol 16 ◽  
Author(s):  
Pan Zhang ◽  
Shun-Sheng Zhao ◽  
JiaJia Wang ◽  
Xiang Rong Liu
Keyword(s):  
Heavy Metal ◽  
Carbon Source ◽  
Fluorescence Quenching ◽  
Hydrothermal Method ◽  
Water Samples ◽  
Carbon Dots ◽  
Mercury Ions ◽  
Grape Skin ◽  
Fluorescent Carbon Dots ◽  
Fluorescent Carbon

Background: In recent years, environmental pollution and heavy metal pollution caused by rapid urbanization and industrialization have become increasingly serious. Among them, mercury (II) ion (Hg2+) is one of the highly toxic heavy metal ions, and its pollution comes from various natural resources and human activities. Therefore, people attach great importance to the development of analytical methods for effective analysis and sensitive detection of Hg2+ . Objective: Using grape skin as a green and environmental friendly carbon source, to synthesize fluorescent carbon dots, and try to apply them to the detect the concentration of Hg2+ in water. Method: Using "Hutai No. 8" grape skin as carbon source, fluorescent carbon dots were synthesized by one-step hydrothermal method. Structure and fluorescent properties of the carbon dots were tested using TEM, XPS, XRD and other characterization instruments, and their utilization on detection of mercury ions in the actual water samples was explored. Results: The CDs had a particle size of about 4.8 nm and a spherical shape. There are N-H, C-N, C=O and other functional groups on the surface. It was found that Hg2+ has obvious fluorescence quenching effect on CDs, and thus CDs fluorescence quenching method to detect the concentration Hg2+ was established, and the detection limit is 3.7 μM, which could be applied to test the concentration of Hg2+ in water samples. Conclusion: Using grape skin as carbon source, fluorescent carbon dots were successfully synthesized by hydrothermal method. Carbon dots were used to detect mercury ions in water, and a method for detecting mercury ions in actual water samples was established.

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