scholarly journals Innovative Ultrasound-Assisted Approaches towards Reduction of Heavy Metals and Iodine in Macroalgal Biomass

Foods ◽  
2021 ◽  
Vol 10 (3) ◽  
pp. 649
Author(s):  
Estefanía Noriega-Fernández ◽  
Izumi Sone ◽  
Leire Astráin-Redín ◽  
Leena Prabhu ◽  
Morten Sivertsvik ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Dry Weight ◽  
The Other ◽  
Laminaria Hyperborea ◽  
Other Hand ◽  
Macroalgal Biomass ◽  
Ultrasound Assisted ◽  
I 31

The aim of this work was to evaluate the potential of ultrasound (US), alone or in combination with mild heating and/or EDTA towards reduction of As, Cd, I, and Hg content of Laminaria hyperborea. Concentrations of As, Cd, I, and Hg of 56.29, 0.596, 7340, and <0.01 mg kg−1 of dry weight, respectively, were found in L. hyperborea blades. Treatment with US at 50 °C increased approx. 2-fold the amount of As released, although did not affect significantly the content of Cd or I, as compared to control (no US) samples. Reducing the temperature to 8 °C significantly decreased the effect of US, but heating at 80 °C did not cause a significant effect as compared to treatments at 50 °C. On the other hand, treatment with 0.1 N EDTA at 50 °C enhanced the percentage of Cd released by approximately 7-fold, regardless of sonication. In the present work, the combination of US and EDTA at 50 °C for 5 min led to a significant reduction of the As (32%), Cd (52%) and I (31%) content in L. hyperborea, thus improving the product’s safety for consumers.

Function of coprophagous beetles (Coleoptera: Scarabaeidae, Geotrupidae, Hydrophilidae) in cattle pastures inferred from pitfall trapping data

2010 ◽  
Vol 27 (2) ◽  
pp. 85-91 ◽  
Author(s):  
Martin Šlachta ◽  
Jan Frelich ◽  
Tomáš Tonka
Keyword(s):  
Seasonal Variation ◽  
Spatial Variation ◽  
Dry Weight ◽  
Seasonal Distribution ◽  
The Other ◽  
Pitfall Trapping ◽  
Other Hand ◽  
Nested Anova ◽  
Species Groups ◽  
Dung Decomposition

Function of coprophagous beetles (Coleoptera: Scarabaeidae, Geotrupidae, Hydrophilidae) in cattle pastures inferred from pitfall trapping dataAn analysis of data on the dry weight biomass of coprophagous beetles in standardized dung (4.5 l) was conducted in order to characterize the spatial and the seasonal distribution of the beetles' biomass in cattle pastures and to elucidate their function in dung decomposition. Nested Anova with factors of farm, site (nested in farm), seasonal period and year was used to evaluate the effect of these factors on the biomass of four functional species groups: the dung dwellers ofScarabaeidae(subfamilyAphodiinae), the dung dwellers ofHydrophilidae, the small tunnellers ofScarabaeidae(subfamilyCoprinae) and the large tunnellers ofGeotrupidae. The spatial variation of biomass (between the sites and the farms) was insignificant (P>0.05) in the two dung-dweller groups and in the large-tunnellers group. On the other hand, a significant (P<0.05) seasonal variation of biomass was found in all but the large tunneller group. In dung dwellers, the spring biomass was formed mainly by two species,Aphodius prodromusandA. sphacelatus. In summer, most of the biomass was accounted for bySphaeridium lunatum, S. scarabaeoidesandA. rufipes. In the two tunneller groups,Onthophagus fracticornis, Geotrupes stercorariusandG. spinigerformed a majority of the biomass in dung.

Regenerative studies on the detached leaves of Echeveria elegans. Regeneration and growth in leaves

1973 ◽  
Vol 51 (2) ◽  
pp. 451-456 ◽  
Author(s):  
M. V. S. Raju ◽  
James E. Hines
Keyword(s):  
Metabolic Activity ◽  
Dry Weight ◽  
The Other ◽  
Inhibitory Influence ◽  
Other Hand ◽  
Detached Leaves

Detached leaves of Echeveria elegans Bgr. produce both roots and shoots. However, when their bases are severed, they tend to produce only roots. It was observed that roots had to be present on detached leaves, bases removed or not, in order to have an increase in size and also in dry weight. The growth in size was found to be due mainly to enlargement of cells, and the increase in dry weight was presumably due to maintenance of normal metabolic activity in the detached leaves. Thus detached leaves of E. elegans have a greater potential for growth than is normally realized by the leaves that are mature and still attached to the parent axis. The vigorously growing shoots seem to have an inhibitory influence on growth in the detached leaves. Roots on detached leaves, on the other hand, seem to play an important role not only in the delaying of senescence but also in reducing the inhibitory influence of shoots. Roots alone appeared to bring about "uncontrolled" enlargement of cells and consequently lesions were formed on the leaves, which finally died off. Thus growth, regeneration, and senescence in the detached leaves appear to be correlative phenomena.

Incidence de l'aération sur le traitement par compostage des sous-produits du palmier dattier contaminés parFusarium oxysporumf.sp.albedinis

2005 ◽  
Vol 51 (1) ◽  
pp. 69-77 ◽  
Author(s):  
K Chakroune ◽  
M Bouakka ◽  
A Hakkou
Keyword(s):  
Total Nitrogen ◽  
Date Palm ◽  
Dry Weight ◽  
Initial Mixture ◽  
Phoenix Dactylifera ◽  
The Other ◽  
Mineral Matter ◽  
Other Hand ◽  
Phoenix Dactylifera L ◽  
Cooling Phase

Composting of date palm (Phoenix dactylifera L.) residues contaminated with Fusarium f.sp oxysporum albedinis, causal agent of the vascular wilt (Bayoud) of the date palm, has been achieved. The effect of the aeration of the piles by manual turning has been studied. The maintenance of an adequate humidity of 60%–70%, necessary to the good progress of the composting process, required the contribution of 11.4 L of water/kg of the dried residues. The evolution of the temperatures in the three piles presents the same phases. A latency phase, followed after 2–3 d of composting by a thermophilic phase, which lasts about 24 d, where the temperature remains elevated between 50 and 70 °C. Then a cooling phase that takes about 15 d, during which the temperatures fall to values between 25 and 35 °C, near room temperature. Fusarium f.sp oxysporum albedinis is eliminated completely during the thermophilic phase of composting, and increasing frequencies of turning accelerate its disappearance to a certain extent. On the other hand, pH remained steady and relatively basic oscillating between 8.2 and 8.7. Ninety percent (90%) of the the date palm residues are composed exclusively of organic matters. The total nitrogen represents only 0.4%. The contribution of manure decreases the ratio of carbon to nitrogen (C/N) from 115 to 48 in the initial mixture. After 80 d of composting and according to the frequency of return up, there is a reduction of the granulometry of the substratum, the C/N ratio (from 29% to 44%), the organic matter (from 15% to 23%), the total volume (from 25% to 35%), and of the dry weight of the swaths (from 16% to 24%). On the other hand there is an increase in total nitrogen rate (from 20% to 40%) and in the mineral matter (from 23% to 35%).Key words: composting, palm date, Fusarium oxysporum f.sp. albedinis.

scholarly journals Study of Heavy Metals Toxicity Level in Workplace Atmosphere by Alternative Methods

2021 ◽  
Vol 906 (1) ◽  
pp. 012034
Author(s):  
Lorand Toth ◽  
Călămar Angela ◽  
Simion Alexandru ◽  
Cristian Nicolescu ◽  
Izabella Kovacs
Keyword(s):  
Heavy Metals ◽  
Working Conditions ◽  
Well Being ◽  
The Body ◽  
The Other ◽  
Alternative Methods ◽  
Positive Contribution ◽  
Other Hand ◽  
Relative Standard ◽  
Toxicological Investigation

Abstract Promoting safety and health at work, as part of the overall improvement of working conditions, is an important strategy, not only to ensure well-being of workers, but also to make a positive contribution to productivity. Health, safety and well-being of workers are therefore prerequisites for improving quality and productivity and are important for equitable and sustainable socio-economic development. Toxicological investigation of an industrial objective involves both knowledge of working conditions and the dynamic establishment of occupational pollutants in the workplace atmosphere, as well as bio-toxicological evaluation, being a synthetic representation of the aggressiveness of pollutants entering the body by various paths (respiratory, cutaneous, digestive, etc.) with reference, at the same time, to the adaptability of respective employees. Evaluation of the toxicological investigation has a role in following the evolution of working conditions and health of employees in time, potential technological changes with possible impact on employees’ health, as well as if new conditions occur, requiring the completion of previous toxicological investigations. Use of heavy metals in different industries has increased the quality of products from different production sectors but on the other hand also led to an increase in the toxicity of workplace atmosphere, which requires an assessment of the negative impact produced. The current paper aims at an alternative analysis of the determination of heavy metals content (Cu, Cd, Pb, Ni, Cr) in workplace atmosphere, using, on one hand, the method of spectroscopy of atomic emissions with inductively coupled plasma and, on the other hand, fluorescence with X rays. Following statistical processing of data gathered by the two alternative methods, the accuracy, reproducibility, relative standard deviation as well as the fidelity of methods expressed by the coefficient of variation will be established.

scholarly journals Heavy Metal Concentrations in Free-Living Southern Caracaras (Caracara plancus) in the Northeast Region of Brazil

2017 ◽  
Vol 45 (1) ◽  
pp. 8 ◽  
Author(s):  
Luana Thamires Rapôso da Silva ◽  
Emanuel Felipe de Oliveira Filho ◽  
Taciana De Holanda Kunst ◽  
Vitor Pereira Matos Rolim ◽  
José Sérgio de Alcântara e Silva ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Significant Variation ◽  
Trophic Levels ◽  
The Other ◽  
Anthropogenic Sources ◽  
Emission Spectrometry ◽  
Free Living ◽  
Metal Concentrations ◽  
External Contamination ◽  
Other Hand

Background: With the continuously increasing release of heavy metals in the environment, mostly from anthropogenic sources, there is a need to find ways of evaluating and managing the issuance of these contaminants and correct its damages. The birds being at the top of some food chains reflect the presence of metals in the environment, keeping this in perspective, raptors have been successfully used for heavy metals biomonitoring studies in the past. The purpose of this study was to identify and quantify cadmium (Cd), mercury (Hg), lead (Pb), copper (Cu), and chromium (Cr) in the feathers and livers of free-living southern caracaras, live and dead, from Recife, Pernambuco state, Northeast of Brazil.Material, Methods & Results: Sixty-two feathers from live and dead southern caracaras and 21 livers from dead southern caracaras were analyzed by atomic absorption spectrometry for Hg and by inductively coupled plasma optical emission spectrometry for Cd, Cr, Pb, and Cu. Concentrations of Cr and Cu elements were detected in all feather and liver samples analyzed from live and dead caracaras. There was no difference in the concentration of metals between feathers of dead and live caracaras: Pb (P = 0.3576), Cd (P = 0.0792), Cr (P = 0.5475), and Cu (P = 0.3603), but significant variation was observed for Hg (P = 0.0459). The highest concentrations of Pb (P < 0.0001) and Cr (P < 0.0001) were found in the feathers than in the liver. On the other hand, the highest concentrations of Cu were found in liver samples (P = 0.0011). No significant variation in the concentrations of Cd (P = 0.7770) and Hg (P = 0.3669) was found between feathers and liver samples.Discussion: Chromium, as well as Hg, and Cu have a high affinity for keratin, which may explain the higher concentrations of Cr in caracaras feathers in this research. Lead was detected in all liver samples analyzed. Elevated levels were also found in the feathers of dead (95.2%) and live (75.6%) caracaras. The presence of Pb may be due to external contamination by pollutants, such as fossil fuels. Higher concentrations of Hg were observed in dead caracaras feathers, this concentrations change during molting but are not affected by external contamination. Metals, such as Hg, and Cd, accumulate in organisms from different trophic levels, which may indicate that this contamination comes mainly from feed. Pearson’s coefficient here showed no correlation between metals from dead caracaras feathers and livers, although a few previous studies have shown a correlation between metal concentrations from tissues and feathers. This pattern can be attributed to the different time of exposure of feathers to metals in relation to livers. The concentrations of metals in hepatic tissues reflect the levels of elements in the diet of these birds, characterizing acutely the contamination of the ecosystem. On the other hand, feathers represent the exposure in the time of molting, when the artery supplies metals, thus representing a chronic exposure. In feathers from live birds, the Pearson’s correlation analysis showed a high to moderate correlation between metals, which may suggest that they come from a similar source, but there is no way to specify the origin since the metals surveyed could be present in the soil, water, or in the prey eaten by these animals. For the purpose of environmental analyses, it is required to determine the exact source of contamination. Considering that it is possible to confirm the presence of these heavy metals in southern caracaras, these birds may be important environmental bioindicators. The development of systematic research on animals and the environment is essential for monitoring the levels of metal pollutants and evaluating their impact in order to guide measures to protect fauna and human health.

THE PHOSPHORUS FRACTIONS OF BACILLUS CEREUS AND BACILLUS MEGATERIUM: II. A CORRELATION OF THE CHEMICAL WITH THE CYTOLOGICAL CHANGES OCCURRING DURING SPORE GERMINATION

1955 ◽  
Vol 1 (7) ◽  
pp. 525-548 ◽  
Author(s):  
P. C. Fitz-James
Keyword(s):  
Bacillus Cereus ◽  
Rna Synthesis ◽  
Dry Weight ◽  
Acid Synthesis ◽  
Nuclear Material ◽  
The Other ◽  
Other Hand ◽  
Soluble P ◽  
Labile P ◽  
Time Required

The oxygen uptake, the changes in the concentrations of the phosphorus (P) fractions, and the dry weights of Bacillus cereus and B. megaterium germinating in thick suspension were followed from the spore to the young vegetative cell. Parallel cytological studies were made using standard procedures of bacterial cytology. During the initial minutes of germination the dry weight of the spores fell, respiratory activity began, the concentration of cold trichloroacetic acid (TCA)-soluble P rose, and the concentration of a residual P fraction insoluble in hot TCA fell. In complete media, nucleic acid synthesis began soon after this initial activation and was accompanied by an uptake of P, a further rise in the acid-soluble P, and in the rate of respiration. The cells began to recover weight. Ribosenucleic acid (RNA) synthesis was detectable by about 10 min. after inoculation and desoxyribosenucleic acid (DNA) synthesis by 15–20 min. Following its initial rise, the rate of RNA synthesis declined and continued parallel to that of DNA for some 10 min. During this period, the uptake of P from the medium appeared to be depressed and the spores (B. cereus) changed in shape from ovoids to short rods. After this period, the RNA synthesis was steady throughout germination. The rise of DNA, on the other hand, was continuous and steady throughout, even in cultures where growth was synchronous. The nuclear material of germinating spores grew and separated in step with the continuous rise of DNA P and the increase in cell volume was of the same order as the increase in RNA P. Under crowded conditions, or in inadequate media, germinating spores and young vegetative cells of B. cereus showed a decreased RNA/DNA ratio and accumulations of labile P. Crowded cultures of B. megaterium, on the other hand, accumulated Sudan positive (fatty) granules, but no labile P. The time required for the germinating spore to duplicate its chromatin varied in different media and could, in some instances, be shortened by subculturing. Nevertheless, the product of this time of germination and the increase in RNA during the germination period approximated to a fixed value that was independent of medium, species, or cell concentration.

scholarly journals Results of the study on measurements of heavy metals concentrations in organs and tissues of livestock grazing on pastures around mining industry in gobi zone

2019 ◽  
Vol 26 (01) ◽  
pp. 10-16
Author(s):  
Bayatogtokh B ◽  
Delgermoron D ◽  
Tsend-Ayush S ◽  
Lkhamjav G ◽  
Tserenchimed S ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Mining Industry ◽  
Uranium Mining ◽  
Soil Samples ◽  
Livestock Grazing ◽  
The Other ◽  
Blood Samples ◽  
Mining Areas ◽  
Other Hand ◽  
Addition Level

Level of the heavy metals was measured in tissue and blood samples from 19 cattle, 20 horse, 38 camel, 89 sheep and 102 goats in several mining areas such as Ulaanbadrakh soum (uranium mining) and Airag soum (spar mining) of Dornogovi province. In addition, level of the lead in the liver of sheep and goat samples from Zuunbayan soum of Dornogovi province was bit higher than same samples from other sampling areas. In the result, level of the copper was 814 ppm in the liver samples of sheep, 734 ppm in the liver samples of goat and they were and 2.5-4.0 fold higher than international permissible value. On the other hand, level of the cadmium was 352,789±122,64 mg/kg in kidney samples of horse, indicating that amount of these heavy metals were enough high to have toxicities in animals. Except for these results, level of heavy metals was not higher than international permissible value in plant and soil samples. Говийн бүсийн уул уурхайн хайгуул олборлолтын бүс орчимд бэлчээрлэж буй малын эд, эрхтэн дэх хүнд металлын агууламжийг тодорхойлсон судалгааны дүнгээс Хураангуй: Дорноговь аймгийн Улаанбадрах, Зүүнбаян сумын нутаг дэвсгэрт ураны хайгуул, туршилтын олборлолт явуулж буй бүс нутаг, Айраг сумын жоншны уурхайн олборлолтын бүс нутаг орчим бэлчээрлэж буй 89 хонь, 102 ямаа, 19 үхэр, 38 тэмээ, 20 адууны эд эрхтэн болон цусанд хүнд металлын (хар тугалга, зэс, кадми) агууламжийг тодорхойлов. Хар тугалга нь тархи болон бөөрийг маш хүндээр гэмтээдэг, ясыг зөөлрүүлдэг, төдийгүй хордолт нь үхэлд хүргэх аюултай бодис билээ. Маш удаан хугацаагаар энэ бодист өртөгдсөн хүүхэд төдийгүй томчуудын мэдрэлийн системийг гэмтээдэг, бага багаар хуримтлагдсаар хордлого үүсгэх, хүний мэдрэлийн эрхтэнд муугаар нөлөөлөх талтай. Хар тугалга нь хүний биед нөлөөлөх байдлаараа хортой бодисын ангилалд ордоггүй. Хөнөөлт бодист тооцогдоно. Иймд мал амьтны эд эрхтэнд агуулагдаж буй хар тугалга болон зэсийн агууламжийг дахин нарийнсудлах шаардлагатай байна. Түлхүүр үг: Хар тугалга, зэс, Индукцэн холбоост плазм масс спектрометр.

scholarly journals Diatoms and Their Capability for Heavy Metals Removal by Cationic Exchange

2017 ◽  
Author(s):  
Juan Hernández-Ávila ◽  
Eleazar Salinas-Rodríguez ◽  
Eduardo Cerecedo-Sáenz ◽  
Ma. Isabel Reyes-Valderrama ◽  
Alberto Arenas-Flores ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Chemical Composition ◽  
The Other ◽  
Mineralogical Characterization ◽  
Heavy Metals Removal ◽  
Chromium Vi ◽  
Other Hand ◽  
Metals Removal ◽  
Cationic Exchange

This work shows the physicochemical and mineralogical characterization of diatomites form the Hidalgo and Jalisco States, Mexico. In the case of the mineral from Hidalgo State, this has the following chemical composition; 70.0 % wt. SiO2, 11.63 wt. % Al2O3, 1.95 wt. % FeO, 1.79 wt. % MgO, 2.41 wt. % K2O, 0.85 wt. % CaO and 6.10 wt. % Na2O. On the other hand, the mineral from Jalisco has the following chemical composition; 93.58 wt. % SiO2, 3.03 wt. % Al2O3, 1.81 wt. % FeO, 0.40 wt. % MgO, 0.92 wt. % K2O, 0.11 wt. % CaO and 0.24 wt. % Na2O. For recovery of metals, both minerals got arsenic, silver, lead and nickel recoveries upper to 95 % and lower to 10 % for chromium. According to efficiency of interchange, the mineral from Hidalgo is slightly higher in the case of arsenic, lead and silver; while for nickel and particularly chromium (VI) the efficiency is higher for the mineral from Jalisco.

scholarly journals SPATIAL DISTRIBUTION OF TRACE METALS (Pb, Cr, Cu AND Zn) IN SEDIMENTS OF THE BERAU DELTA, EAST KALIMANTAN AND THEIR ACCUMULATION IN BENTHIC BIOTA

2018 ◽  
Vol 32 (2) ◽  
pp. 89-94 ◽  
Author(s):  
Z. Arifin ◽  
T. A. Koesmawati
Keyword(s):  
Spatial Distribution ◽  
Trace Metals ◽  
Dry Weight ◽  
Coastal Ecosystem ◽  
The Other ◽  
Metal Concentrations ◽  
East Kalimantan ◽  
Other Hand ◽  
Cu And Zn

Berau delta is a coastal ecosystem where man-made activities are relatively low. The present study has investigated spatial distribution of Pb, Cr, Cu and Zn in sediments and their implication to benthic biota. The result of our study showed that metal concentrations varied from undetected to 55.53 mg kg-1 for Pb and from 3.28 to 22.9 mg kg-1 for Cu, while for Cr and Zn vary from 9.65 to 64.67 mg kg-1 and 10.00 to 1,200 mg kg-1, respectively. The concentrations of Pb, Cu, Cr and Zn in Anadara sp were 7.53 ± 2.06, 4.92 ± 0.55, 1.44 ± 0.12 and 97.87 ± 9.12 mg kg-1 dry weight (dw), respectively. On the other hand, the Pb, Cr, Cu and Zn in Telescopium mauritsi were 4.49 ± 0.03, 0.87 ± 0.05, 259.0 ± 0.01 and 64.78 ± 0.01 mg kg-1 dw, respectively. In conclusion, spatial distribution of trace metals (Pb, Cu, Cr and Zn) in sediments showed that higher concentrations were found in the southern part of the delta, and the accumulation of the metals by mollusk might reflect natural concentrations in biota.

scholarly journals Al-kut Dam Sediments Content of Some Heavy Metals and Its Relationship with Pollution

2018 ◽  
Vol 7 (2) ◽  
pp. 23-35
Author(s):  
Bashar J.J. Al-Sabah ◽  
Hashim H. Kareem Aldhahi ◽  
Awad A.S. Al-Zergani
Keyword(s):  
Heavy Metals ◽  
Zinc Concentration ◽  
Total Concentration ◽  
Cadmium Concentration ◽  
Water Concentration ◽  
The Other ◽  
Nickel Concentration ◽  
The Third ◽  
Other Hand ◽  
Critical Limits

This study has been carried out in  Alkut city the center of Wasit province which is located about 180 km south of the capital Baghdad on one from the most important dams constructed on theriverTigris called Alkut Dam  .Four pedons have been selected in this study, two pedons (A,B) are located in  the lower part of dam and the other two pedons (C ,D) are located in the upper part of dam ,  sediments samples analysis for particle  size distribution  and  total  & available  heavy metals concentration (Ni ، Cd ، Zn ، Pb ،Fe) in the water and sediments. Results show that the total concentration of nickel ranges between(104.2 - 178.4) mg.kg-1and the higher value has been found in the second depth (156-126)cm for pedon A  and the lower value has been found in the second depth (50-30) for pedon D ,  while total cadmium concentration ranges between (6.1-2.2)mg.kg-1and the higher value has been found in the second depth (35-20) for pedon A at the lower part of dam  and the lower value has been found in the sixth depth (73-93cm)for the same pedon , the values for total Zinc concentration ranges between  (108-69) mg.kg-1 and the higher value has been found in the fifth depth (73-55)cm for pedon A at the lower part of dam  and the lower value has been found in the last depth (120-100cm) for  pedonD in the upper part of dam, the results of total lead concentration ranges between  (24.2-11.35) mg.kg-1 and the higher value has been found in the first depth (0-20cm)cm for pedon A at the lower part of dam  and the lower value has been found in the third depth (60-50cm) for  pedonD in the upper part of dam ,  while the total concentration for  iron (Fe) which  ranges between (4595-2988) mg.kg-1 the higher value has been found in the second depth (20-50cm) for pedon A at the lower part of dam  and the lower value has been found in the seventh depth (111-93cm) for  the same pedon .As compared with critical limits , results show that total concentration of heavy metals  for Cd, Pb, Zn and Ni in Sediments samples all has exceed the critical limits values  except in some depths. The results for the available heavy metal concentrations show that the available nickel concentration ranges between(33.2-107.4)mg.kg-1 and the higher value has been found in the second   depth (20-35)cm for pedon A at the lower part of dam  and the lower value has been found in the second  depth (30-50) for  pedonD in the upper part of dam,while total cadmium concentration ranges between (0.21-0.48)mg.kg-1and the higher value has been found in the first depth (0-20)cm for pedon B at the lower part of dam  and the lower value has been found in the sixth depth (73-93cm)for the pedon A at the lower part of dam ,  the values for the available Zinc concentration ranges between  (56-111) mg.kg-1 and the higher value has been found in the tenth depth (191-231)cm for pedon A at the lower part of dam  and the lower value has been found in the last depth (120-100cm) for  pedonD in the upper part of dam, the results of available  lead (pb) concentration ranges between  (6.7-20.2) mg.kg-1 and the higher value has been found in the first depth (0-20cm)cm for pedon A at the lower part of dam  and the lower value has been found in the third depth (60-50cm) for  pedonD in the upper part of dam ,  while the available concentration for  iron (Fe) which  ranges between (39-74)mg.kg-1 the higher value has been found in the second depth (20-50cm) for pedon A at the lower part of dam  and the lower value has been found in the eighth  depth(111-126) for  the same pedon,at the comparison of results for the available concentrations of the studied heavy metals it can be seenthat all values have exceeded the critical limits values  according to Nunes etal 2014. in the other hand the results show that there is significant correlation between the total and available concentration for same heavy metalspairs of the correlation  (r2) between the available and total  concentration  was 0.90 ,  0.74 , 0.99, 0.99 and 0.58 for Ni , Cd , Zn , Pb  and Fe respectively , in the other hand, the results show that the water concentration for heavy  metals are 1.7 , 0.03  ,15 , 0.07 and  27 mg.l-1for Ni , Cd , Zn , Pb  and Fe respectively , which indicate that all   values  have  exceeded the  critical limits according to  Iraqi standards and  FAW.

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