scholarly journals Assessment of the Current State of the Caspian Sea and the Caspian Seal Habitat Analysis

2019 ◽  
Vol 21 (2) ◽  
pp. 165
Author(s):  
A.I. Tasmagambetova ◽  
A.D. Tovassarov ◽  
A.-C. Bihan-Poudec ◽  
S.S. Bissariyeva ◽  
A.B. Akberliyev
Keyword(s):  
Heavy Metals ◽  
Water Samples ◽  
Sea Water ◽  
Organic Chemical ◽  
The Caspian Sea ◽  
Study Region ◽  
Habitat Analysis ◽  
Cadmium Lead ◽  
Different Origins ◽  
Caspian Seal

This article is devoted to the determination of heavy metals and harmful organic compounds in sea water – the habitat of the Caspian seal. The group of the most common heavy metals, according to many authors, includes manganese, nickel, zinc, iron, cadmium, lead, copper and their salts, characterized by long-term preservation and accumulation in water, sediments and hydrobionts. The studies were conducted from February 7–12, 2017 on the route from the Kalamkas (Kazakhstan) field through the islands of Kulaly to the village of Bautino. Water samples were taken 10‒20 cm below the sea ice and surface level, each sample was taken in 2 replicates: one for the Kazakhstan laboratory in Almaty and one for the French independent laboratory. Water samples were analyzed for the content of 13 heavy metals such as – Co, Cu, Ti, Bi, Ag, V, Al, Be, Sb, Sn, Fe, Cr, Mo. It was established that in all water samples the content of vanadium exceeds the maximum permissible concentration (MPC) level by 1.5–7.4 times, beryllium ‒ 140–445 times, antimony 13.2–17.2 times. The maximum concentrations of the V and Be contents were found in water samples taken at sampling points No. 1 and 2, and Sb ‒ at points No. 1.6, 7.8. Cobalt, copper, iron and chromium were not detected in the samples presented. The content of other metals (Ti, Bi, Ag, Al, Sn, Mo) was significantly below the permissible levels or below the detection limits of the method. All samples of sea water are contaminated by several organic chemical pollutants, to various degrees and from different origins. Data on the accumulation of petroleum hydrocarbons and heavy metals in the habitat of Caspian seals characterize the toxicological situation in the study region.

DETERMINATION OF HEAVY METALS IN WATER SAMPLES TAKEN FROM THE SHIKH AREA OF THE CASPIAN SEA USING ICP-MS (7500CX) DEVICE

Alchemist ◽  
2020 ◽  
Vol 1 (2) ◽  
pp. 19-24
Author(s):  
S.R. Hajiyeva ◽  
◽  
T.I. Aliyeva ◽  
N.M. Cafarova
Keyword(s):  
Heavy Metals ◽  
Environmental Monitoring ◽  
Water Samples ◽  
Caspian Sea ◽  
Research Laboratory ◽  
Marine Water ◽  
The Caspian Sea ◽  
Icp Ms ◽  
Analytical Research

Water samples were taken from the Shikh shore of the Caspian Sea to conduct the research. In the marine water samples taken from the area, heavy metals were identified using the Agilent 7500 Series ICP-MS device. The analyzes were performed in the Complex Analytical Research Laboratory of the National Department of Environmental Monitoring

Determination of toxic heavy metals in sea water by FAAS after preconcentration with a novel chelating resin

2011 ◽  
Vol 64 (4) ◽  
pp. 803-808 ◽  
Author(s):  
D. Manivannan ◽  
V. M. Biju
Keyword(s):  
Heavy Metals ◽  
Water Samples ◽  
Sea Water ◽  
Metal Chelates ◽  
Chelating Resin ◽  
Toxic Heavy Metals ◽  
Lead And Zinc ◽  
Copper Manganese ◽  
Cobalt Copper

A solid phase extraction procedure was developed for preconcentration of toxic heavy metals such as cadmium, cobalt, copper, manganese, lead and zinc in sea water samples. A microcolumn packed with 6-[(4-hydroxyphenyl)diazenyl]naphthalene-2,3-diol-formaldehyde (HPDN-F) resin acts as a sorbent to retain the analyte ions by forming metal chelates. The retained trace level metal was subsequently eluted with 1 mol/L HCl and the acid eluent was analysed by Flame Atomic Absorption Spectrophotometer (FAAS). The HPDN-F chelating resin and its metal chelates were characterized by spectral and thermal analysis. The chelating property of the HPDN-F resin towards divalent metal ions was studied as a function of pH and preconcentration flow rate. The recoveries of cadmium, cobalt, copper, manganese, lead and zinc under the optimum working conditions were above 95%. The relative standard deviations were <2%. The limits of detection were <0.1 μg/L. The method presented was applied for the determination of cadmium, cobalt, copper, manganese, lead and zinc in sea water samples.

scholarly journals Presencia de metales pesados Cadmio y Plomo en el estuario del río Chone Manabí, Ecuador.// Presence of cadmium and lead heavy metals in the estuary of Chone River - Manabí, Ecuador

Ciencia Unemi ◽  
2017 ◽  
Vol 10 (24) ◽  
pp. 123
Author(s):  
Francisco Pozo Miranda
Keyword(s):  
Heavy Metals ◽  
Water Column ◽  
Water Samples ◽  
Sea Water ◽  
River Estuary ◽  
Soil Samples ◽  
Water Currents ◽  
High Concentrations ◽  
Cadmium And Lead ◽  
Del Rio

El presente estudio busca determinar la presencia de metales pesados, Cadmio y Plomo, en el estuario del Río Chone, Ecuador, durante Junio a Septiembre de 2014; se obtuvieron seis muestras de agua y cinco de suelo en seis sitios, con dos réplicas por sitios, dando el total de 66 muestras. El análisis se realizó según el protocolo del Kit para Cadmio y Plomo de Merck-Millipore. En el agua las concentraciones de Cadmio fueron mayores en el sitio P4 (0,129 mg/L). En el sedimento, el nivel de Cadmio en el sitio P2 presentó mayor acumulación (0,0033 mg/g), para Plomo, los sitios con mayor nivel fueron P5 y P6 (0,18 – 0,21 mg/L respectivamente), lugares con mayor flujo de agua del estuario del Río Chone (8 UPS: Unidades Prácticas de Salinidad) y menor influencia con las corrientes del agua del Mar (30 UPS). Los resultados comparados con la legislación Ecuatoriana evidencian concentraciones  altas de Cadmio en el ecosistema del estuario en estudio, que podría afectar la salud de organismos que viven a nivel de la columna de agua, tales como peces, al igual que actividades de recreación de los bañistas locales, de los cantones Sucre y San Vicente Manabí.ABSTRACTThe present study aims to determine the presence of cadmium and lead heavy metals in the Chone River estuary; Ecuador, during June to September 2014, six water samples and five soil samples were obtained at six sites, with two replications per site giving a total of 66 samples. The analysis was performed according to the protocol of Merck-Millipore Kit for cadmium and lead. Cadmium concentrations in the water were higher at the P4 site (0.129 mg/L). The level of cadmium in the sediment showed greater accumulation (0.0033 mg/g) in the P2 site. The sites with higher level of lead were P5 and P6 (0.18 y 0.21 mg/L respectively), these were places with greater flow of water of the Chone River estuary (8 UPS: Practical Units of Salinity) and less influence of the sea water currents (30 UPS).The results compared with Ecuadorian legislation show high concentrations of cadmium in the ecosystem of Chone River estuary, which could affect the health of organisms living at the water column level, such as fish, as well as recreational activities for local bathers from Sucre and San Vicente cantons from Manabí province.

scholarly journals Monitoring heavy metal contamination levels and microbiological pollution in seawater of Agadir coastal zones

2020 ◽  
Vol 5 (3) ◽  
pp. 463-469
Author(s):  
Illyass Bazzi ◽  
Khadija El Mouaden ◽  
Aicha Chaouay ◽  
Abdelaziz Ait Addi ◽  
Mohamed Hamdani ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Physicochemical Parameters ◽  
Heavy Metal Contamination ◽  
Sea Water ◽  
Coastal Zones ◽  
Heavy Metal Concentrations ◽  
Cadmium Lead ◽  
Contamination Levels ◽  
Bacteriological Contamination

The objective of this study was to monitor the bacteriological contamination of the seawater of the marine fisheries of the coastal Agadir, Morocco. The study was focused on the diagnosis on the pollution in heavy metals, such as cadmium, lead, and mercury in five zones: the port of Imi Ouaddar fish boarding (zone Z1), the old port of Agadir (zones Z2 and Z3), the port of Agadir Marina (zone Z4), and the estuary of Oued Souss (zone Z5). The analyses were done by testing physicochemical parameters (such as pH, temperature, dissolved oxygen, salinity and conductivity) as well as microbiological and atomic adsorption analyses. The experimental results showed that the values of the physicochemical parameters were almost the same in all zones, while the microbial conditions were different, in which this is due to the existence of heavy metals. The more heavy metal concentrations affected the condition of microbes in the sea water, confirmed by the number of Escherichia coli. This study demonstrated the importance of controlling concentration of heavy metals for better sustainability of environment.

scholarly journals Assessment of Heavy Metals Contamination in Drinking Water of Garmian Region, Iraq

2018 ◽  
Vol 2 (2) ◽  
pp. 40
Author(s):  
Hayder Mohammed Issa ◽  
Azad Alshatteri
Keyword(s):  
Heavy Metals ◽  
Drinking Water ◽  
Statistical Analysis ◽  
Water Samples ◽  
Pollution Index ◽  
Critical Issue ◽  
Evaluation Index ◽  
Study Region ◽  
Metals Pollution ◽  
Heavy Metals Pollution

Drinking water of safe quality is a critical issue for human survival and health. Water pollution by heavy metals is very crucial because of their toxicity. This study assesses potential of heavy metals pollution in drinking water in Garmian Region, East Iraq. Water samples were investigated for 23 heavy metals and 6 chemical contaminants collected from 16 locations. The analysis was performed by using coupled plasma optical emission spectroscopy (ICPOES, Spectro Arcos). High levels of Al, Se, Sr, and Fe have been detected at certain locations in study area. Statistical analysis techniques of the correlation matrix (CM), and cluster hierarchical analysis (CA) were conducted. The heavy metals pollution index (HPI), heavy metals evaluation index (HEI), and contamination Index (Cd) were used applied. These indices linked with the statistical analysis to interpret relationships among the tested parameters in water samples and to investigate the pollution sources over the study region. Even with the significant correlations between the HPI, Cd, and HEI, they showed dissimilar impact of examined heavy metals on the water quality. The most reliable pollution evaluation index of HEI for drinking water showed that 44% of the water samples is critically polluted. Sources of the contamination are most likely coming from natural geological sources. Anthropogenic impact was only noticed at several sites in the study area.

scholarly journals High zinc contents of sea water in Kangerdluarssuk, the Ilímaussaq area, South Greenland

1978 ◽  
Vol 90 ◽  
pp. 79-81
Author(s):  
G Asmund ◽  
J Rose-Hansen
Keyword(s):  
Water Samples ◽  
Sea Water ◽  
Anodic Stripping Voltammetry ◽  
Stripping Voltammetry ◽  
Heavy Elements ◽  
Universal Series ◽  
High Zinc ◽  
Anodic Stripping ◽  
Zinc Cadmium ◽  
Cadmium Lead

Samples of sea water were collected in Kangerdluarssuk in the summers of 1974 and 1975 (fig. 28) as part of the geochemical-ecological Narssaq project (Bohse et al., 1975; Nielsen et al., 1976). These have been analysed for dissolved zinc, cadmium, lead and copper by anodic stripping voltammetry (Table 5). Water samples were collected with teflon-coated 5 litre Universal Series water sampIers with drop messengers (Hydro-bios, Kiel). In 1974 the water samples were taken from GGU motor cutter N. V. Ussing, in May 1975 from M/S Adolf Jensen and in September 1975 from a rubber boat. The samples were kept in plastic canisters previously analysed for heavy elements.

Concentration of some Heavy Elements in Water , Sediment and Plants in Al-Gharraf River in Thi-Qar Province –South of Iraq

2020 ◽  
pp. 69-72
Keyword(s):  
Heavy Metals ◽  
Phragmites Australis ◽  
Water Samples ◽  
Cadmium Concentration ◽  
Dry Weight ◽  
Oil Field ◽  
Heavy Elements ◽  
Cadmium Lead ◽  
South Of Iraq ◽  
Cadmium And Lead

The present study was included to estimate the Concentration and distribution of selected Heavy elements Cadmium, Lead, Nickel and Zinc from water, sediment and two species of plant ( Phragmites australis and Ceratophyllim demersum). Also same physical characteristic of this river in water , samples were collected of three stations in Al-Gharraf River in order to investigates the possibility of pollution in this area with these elements .three station (Al-Fajr districts , Qal'at Sukkar districts and Al-Rifa'I districts) were chosen to execute this study during the period from May 2018 until February 2019. And the high temperature was recorded (13 ٥C in winter to 30 ٥C in summer), pH (7.44 to 7.8) and Turbidity (2.41 to 10.2)NTU. and salinity (0.01 to 0.069) ppt. Also all the heavy metals recorded a significant increase in water and Ceratophyllin demersum plant samples in the winter higher than summer and in the sediments and Phragmites australis plant the rise in the winter was only in the elements nickel and zinc, but in cadmium and lead were concentration low or do not make a big difference in the winter compared to the summer , Where the highest percentage of nickel and zinc in the sediments in the second and third stations respectively reached 86.2 mg / kg dry weight . The lowest concentration of cadmium concentration in water samples at the first station for the summer was 0.0021 mg / L . Where there is a positive relationship between the increase in concentrations of heavy metals in the samples studied and increase in the amount of rain , speed of runoff and the rise in water level in the river in winter due to the volume of rising smoke as a result of pollution which descends during the rainfall and erosion of the edges of the river and lack of control over the domestic sewage that has been brought into the river . As well as probable cause to exist Al-Gharraf oil field that newly established and located north of Fajr city, was considered a control station and opposite to the Qal'at Sukkar city and south of Al-Rifai city we can be observed through the results which show a gradual rise in the second and third stations and third station was higher than stations 1 and 2.

Evaluation and Content of Various Heavy Metals in the Bohai Bay (China) during the Autumn

2014 ◽  
Vol 675-677 ◽  
pp. 295-298
Author(s):  
Hong Wei Wang ◽  
Duan Bo Cai ◽  
Zhong Fu ◽  
Chun Long Zhao ◽  
Na Zhu ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Surface Water ◽  
Water Samples ◽  
Metal Content ◽  
Bottom Water ◽  
Sea Water ◽  
Quality Standard ◽  
Bohai Bay ◽  
Seawater Quality

There were 48 sea water samples collected from Bohai Bay (China) in autumn, 2013. In surface water the heavy metal content from high to low was Cu, Zn, Cr, As, Pb, Cd, Hg, as Zn, Cu, Cr, As, Pb, Cd, Hg in bottom water. Cr and As were up to the first class value of the seawater quality standard except Zn and Cu.

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