Trace Metals in the Waters of the Gulf of St. Lawrence

1974 ◽  
Vol 11 (7) ◽  
pp. 939-950 ◽  
Author(s):  
J. Michael Bewers ◽  
Ian D. Macaulay ◽  
Bjørn Sundby
Keyword(s):  
Colloidal Iron ◽  
Local Conditions ◽  
Cobalt Nickel ◽  
Nickel Copper ◽  
Circulation Patterns ◽  
Zinc Cadmium ◽  
Particulate Iron ◽  
Copper Zinc ◽  
The Mean ◽  
Cadmium And Lead

Concentrations of the trace elements iron, cobalt, nickel, copper, zinc, cadmium, and lead were measured in samples collected from the waters of the Gulf of St. Lawrence. Cobalt, cadmium, and lead occurred at or below the detection limits of the analytical method. The mean concentrations of nickel, copper, and zinc were 0.4 μgl−1. 0.6 μgl−1 and 1.8 μgl−1 respectively, and there was no evidence that local conditions influence their distribution. The distribution of dissolved and colloidal iron is related to dilution and precipitation processes which occur as fresh and saline waters are mixed. The particulate iron distribution is largely governed by water circulation patterns and settling.

Graphene oxide/cellulose membranes in adsorption of divalent metal ions

RSC Advances ◽  
2016 ◽  
Vol 6 (99) ◽  
pp. 96595-96605 ◽  
Author(s):  
Rafal Sitko ◽  
Marcin Musielak ◽  
Beata Zawisza ◽  
Ewa Talik ◽  
Anna Gagor
Keyword(s):  
Graphene Oxide ◽  
Metal Ions ◽  
Divalent Metal ◽  
Divalent Metal Ions ◽  
Cobalt Nickel ◽  
Nickel Copper ◽  
Zinc Cadmium ◽  
Copper Zinc ◽  
Cellulose Membranes ◽  
Cadmium And Lead

In this paper, graphene oxide/cellulose membranes were prepared in order to perform effective adsorption of heavy metal ions: cobalt, nickel, copper, zinc, cadmium and lead.

Direct electrochemical synthesis of cobalt, nickel, copper, zinc, cadmium, tin and lead zincon complexes

1992 ◽  
Vol 17 (1) ◽  
pp. 1-4 ◽  
Author(s):  
Hassan E. Mabrouk ◽  
Mohamed Gaber ◽  
A. Z. El-Sonbati ◽  
Gad B. El-Hefnawey
Keyword(s):  
Electrochemical Synthesis ◽  
Cobalt Nickel ◽  
Nickel Copper ◽  
Zinc Cadmium ◽  
Copper Zinc

scholarly journals Pollution Problem in River Kabul: Accumulation Estimates of Heavy Metals in Native Fish Species

2015 ◽  
Vol 2015 ◽  
pp. 1-7 ◽  
Author(s):  
Habib Ahmad ◽  
Ali Muhammad Yousafzai ◽  
Muhammad Siraj ◽  
Rashid Ahmad ◽  
Israr Ahmad ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Fish Species ◽  
Fish Population ◽  
Native Fish ◽  
Nickel Copper ◽  
Wallago Attu ◽  
Zinc Cadmium ◽  
Copper Zinc ◽  
Cadmium And Lead ◽  
River Kabul

The contamination of aquatic systems with heavy metals is affecting the fish population and hence results in a decline of productivity rate. River Kabul is a transcountry river originating at Paghman province in Afghanistan and inters in Khyber Pakhtunkhwa province of Pakistan and it is the major source of irrigation and more than 54 fish species have been reported in the river. Present study aimed at the estimation of heavy metals load in the fish living in River Kabul. Heavy metals including chromium, nickel, copper, zinc, cadmium, and lead were determined through atomic absorption spectrophotometer after tissue digestion by adopting standard procedures. Concentrations of these metals were recorded in muscles and liver of five native fish species, namely,Wallago attu,Aorichthys seenghala,Cyprinus carpio,Labeo dyocheilus, andOmpok bimaculatus. The concentrations of chromium, nickel, copper, zinc, and lead were higher in both of the tissues, whereas the concentration of cadmium was comparatively low. However, the concentration of metals was exceeding the RDA (Recommended Dietary Allowance of USA) limits. Hence, continuous fish consumption may create health problems for the consumers. The results of the present study are alarming and suggest implementing environmental laws and initiation of a biomonitoring program of the river.

scholarly journals Mushrooms as Biomonitors of Heavy Metals Contamination in Forest Areas

2018 ◽  
Vol 25 (4) ◽  
pp. 557-568 ◽  
Author(s):  
Paweł Świsłowski ◽  
Małgorzata Rajfur
Keyword(s):  
Heavy Metals ◽  
Absorption Spectrometry ◽  
Degree Of Contamination ◽  
Passive Biomonitoring ◽  
Nickel Copper ◽  
Zinc Cadmium ◽  
Forest Division ◽  
Iron Nickel ◽  
Copper Zinc ◽  
Cadmium And Lead

Abstract The aim of the research was to assess the level of contamination with heavy metals (manganese, iron, nickel, copper, zinc, cadmium and lead) in two forest areas selected in different places in Poland: the first one in the Swietokrzyskie Province (forests of the Staporkow Forest Division) and the second one in the Opolskie Province (forests of the Kup Forest Division). The degree of contamination of these forest areas with analytes was found using edible large-fruited mushrooms naturally occurring there - the research was carried out using passive biomonitoring method. Heavy metals in mushrooms (separately in stems and hats) as well as in soil samples were determined by atomic absorption spectrometry with excitation in flame (F-AAS). The obtained results were interpreted by assessing the degree of contamination of forest areas on the basis of concentrations of heavy metals in mushrooms. The obtained results indicate an increased accumulation of heavy metals in hats than in mushrooms stems. On the basis of the obtained data, significant contamination of forest areas with selected heavy metals was also found. This is confirmed by the possibility of using mushrooms as biomonitors in passive biomonitoring of forest areas, which are heavy metal accumulators. In the interpretation of the test results, the phytocumuling factor (PF) was also used. The degree of accumulation of heavy metals, from given forest areas - from soil to mushrooms - was assessed on the basis of determined PF coefficients. In addition, good bioavailability of the analysed analytes by mushrooms was found. Additionally, on the basis of the conducted studies, the possibility of mushroom consumption was assessed - they are not suitable for consumption due to the fact that the permissible concentration standards of heavy metals contained in mushrooms were exceeded.

scholarly journals Environmental Impacts of an Old Mine Tailings Deposit – Metal Concentrations and Water Pathways

1987 ◽  
Vol 18 (4-5) ◽  
pp. 301-312 ◽  
Author(s):  
P. Sandén ◽  
S. Karlsson ◽  
U. Lohm
Keyword(s):  
Environmental Impacts ◽  
Mine Tailings ◽  
Water Bodies ◽  
Contaminated Water ◽  
Surrounding Area ◽  
Metal Concentrations ◽  
Principal Source ◽  
Zinc Cadmium ◽  
Copper Zinc ◽  
Cadmium And Lead

Variations in metal concentrations in a heavily polluted stream receiving acidic leachates from an old mine tailings deposit are analysed from a hydrological perspective. From an extensive data material, collected during three years, the variations in concentrations of four metals (copper, zinc, cadmium and lead) are discussed. The deposit is the principal source for these metals in the watershed. The variation in metal concentrations in the vicinity of the deposit can to a large extent be explained by simple dilution of contaminated water with uncontaminated water from the surrounding area. Further downstream the deposit, other processes become increasingly important for the metal concentrations in the water bodies.

Influence of Nitrilotriacetate on the Elimination of Metal Ions by Coprecipitation with Ferric Hydroxide

1987 ◽  
Vol 19 (5-6) ◽  
pp. 1013-1019 ◽  
Author(s):  
F. H. Frimmel ◽  
J. Geywitz
Keyword(s):  
Conditional Distribution ◽  
Ferric Hydroxide ◽  
Distribution Coefficients ◽  
Metal Species ◽  
Batch Experiments ◽  
Reaction Conditions ◽  
Low Concentrations ◽  
Zinc Cadmium ◽  
Copper Zinc ◽  
Cadmium And Lead

The elimination of dissolved copper, zinc, cadmium and lead by coprecipitation with iron(III) hydroxide was investigated. The reaction conditions of the batch experiments were adopted from water treatment. Conditional distribution coefficients show the order Cd < Zn < Cu < Pb for increasing interaction of the metals with the ferric hydroxide. The presence of nitrilotriacetate (NTA) decreases the efficiency of the metal elimination. NTA is also able to remobilize metals from the metal enriched precipitation. There is a significant effect, even at low concentrations of a few µmol/l. Remobilization of Cu, Zn and Cd increases, remobilization of Pb decreases with reaction time. The “ageing” of the precipitation plays an important role for the yield of the reactions. From a broad application of NTA in detergents an increase of the concentration of dissolved metal species has to be expected.

Copper, Zinc, Cadmium, and Lead in Sheep Grazing in North Greece

1999 ◽  
Vol 62 (6) ◽  
pp. 691-699 ◽  
Author(s):  
N. Zantopoulos ◽  
V. Antoniou ◽  
E. Nikolaidis
Keyword(s):  
Sheep Grazing ◽  
Zinc Cadmium ◽  
Copper Zinc ◽  
Cadmium And Lead
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