scholarly journals Geochemistry of Atmospheric Dust on the Territory of the City of Yerevan

2012 ◽  
Vol 7 (1) ◽  
pp. 74-77
Author(s):  
Armen Saghatelyan ◽  
Lilit Sahakyan ◽  
Olga Belyaeva
Keyword(s):  
Heavy Metal ◽  
Load Level ◽  
Ground Layer ◽  
Atmospheric Dust ◽  
Metal Contents ◽  
The City ◽  
Dust Load

This research is focused on the level of heavy metal contents in dust of a near-ground layer of atmosphere. The dust load level was evaluated as medial. Indicated was a quality composition of dominating dust pollutants. The level of summary load of metals was low.

Impact of Heavy Metals on Benthic Oligochaete Communities in the River Ill and Its Tributaries

1994 ◽  
Vol 29 (3) ◽  
pp. 241-248 ◽  
Author(s):  
A. Rosso ◽  
M. Lafont ◽  
A. Exinger
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Organic Matter ◽  
Reproductive Strategy ◽  
Organic Micropollutants ◽  
Rhine Basin ◽  
Metal Contents ◽  
The Impact ◽  
The City

The aim of this research is to describe the impact of heavy metals contaminating sediments on oligochaete communities. Sediments were collected three times (June, August, October 1991) for chemical and biological analyses in 15 sites situated in the river I11 and its tributaries (Rhine Basin, France). The sediments are characterized by high contents of heavy metals, mainly Hg, Cu, Cr, Pb, Zn from below the city of Mulhouse. The majority of sediments are heavily loaded with organic matter and organic micropollutants are also present. Oligochaete communities are rich in species. However five species only, considered as pollution-tolerant or opportunist, are significantly present and abundant. The percentages of Tubificidae without hair setae are positively related to heavy metal contents of the sediments, and the percentages of Tubificidae with hair setae are negatively related. Several species such as N. communis, N. barbata, D. digitata and Bothrioneurum sp. are considered as tolerant to heavy metals; on the contrary L. claparedeanus, L. udekemianus, Stylodrilus sp. and S. josinae are considered as intolerant. The reproductive strategy of oligochaetes in contaminated areas and the role of organic matter are discussed. Several recommendations are given for the rehabilitation of the investigated sites.

scholarly journals PHOSPHORUS AND HEAVY METAL CONTENTS IN SMALL-SCALE COMPOSTING AREAS

2020 ◽  
Vol 8 (8) ◽  
pp. 1-14
Author(s):  
Cleiton Junior Ribeiro Lazzari ◽  
Vilmar Müller Junior ◽  
Lucas Benedet ◽  
Rafael da Rosa Couto ◽  
Jucinei José Comin ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Organic Waste ◽  
Available P ◽  
Small Scale ◽  
Soil Layers ◽  
Soil Sealing ◽  
Metal Contents ◽  
Environmental Limits ◽  
The City ◽  
Proper Disposal

Composting is an important tool for recycling and proper disposal of organic waste. However, in small-scale composting, where total soil sealing and leachate collection is not carried out, elements such as P, Cu, Zn, Cd, Cr, Ni and Pb may accumulate in soil. This study aimed to assess phosphorus and heavy metal contents in soils of areas used for small-scale food waste composting. In order to do this, we sampled soil depths of 0-5, 5-10, 10-20, 20-30 and 30-40 cm of four areas with composting times of 16, 12, 7 and 1 year, in addition to four reference areas. All the study areas are located in the city of Florianópolis, Santa Catarina state, Brazil. We determined available P, Cu and Zn contents and total Cu, Zn, Cd, Cr, Ni and Pb contents in the soil samples. We found that the production of organic compost directly on the soil generally promoted increases in available P contents, which were above acceptable environmental limits, especially at the uppermost soil layers. Still, the presence of Cu, Zn, Cd, Cr, Ni and Pb was not an environmental liability in the composting areas, as the contents found were below those recommended by legislation.

scholarly journals Assessment of heavy metal pollution of topsoils and plants in the City of Belgrade

2016 ◽  
Vol 81 (4) ◽  
pp. 447-458
Author(s):  
Gordana Andrejic ◽  
Tamara Rakic ◽  
Jasmina Sinzar-Sekulic ◽  
Nevena Mihailovic ◽  
Jasmina Grubin ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Plant Species ◽  
Metal Pollution ◽  
Heavy Metal Pollution ◽  
Urban Parks ◽  
Buxus Sempervirens ◽  
Metal Contents ◽  
Mahonia Aquifolium ◽  
Almost All ◽  
The City

In order to assess heavy metal pollution in the city of Belgrade (Serbia) concentrations of V, Cr, Mn, Co, Ni, Cu, Zn, Cd and Pb were measured on 18 topsoil samples collected in the proximity to central urban boulevards and in urban parks. In addition, concentrations of specified elements were determined in leaves of three evergreen plant species Buxus sempervirens L., Mahonia aquifolium (Pursh) Nutt. and Prunus laurocerasus L. so as to estimate their sensitivity to heavy metal pollution. Even though various types of soils from different quarts of Belgrade were sampled, their heavy metal contents were very similar, with somewhat higher concentrations of almost all elements detected in the proximity to high traffic roads. Generally, concentrations of heavy metals in leaves of investigated plant species paralleled the heavy metal concentrations found in their respective soils and were higher in plants sampled from boulevards then from urban parks. Since investigated plant show no visible injuries induced by detected heavy metal pollution these species are suitable for the successful urban landscaping.

The River Rhine as a source of micropollutants in the canal sediments of the city of Delft (The Netherlands)

2003 ◽  
Vol 48 (10) ◽  
pp. 143-150 ◽  
Author(s):  
P. Kelderman ◽  
Y. Xuedong ◽  
Q. Wenchuan ◽  
W.M.E. Drossaert
Keyword(s):  
Heavy Metal ◽  
Statistical Analysis ◽  
Inner City ◽  
River Rhine ◽  
Organic Micropollutants ◽  
Pollution Levels ◽  
Local Pollution ◽  
Metal Contents ◽  
The City ◽  
Rhine Water

This paper presents a statistical analysis of the pollution levels for heavy metals and organic micropollutants at 182 sediment stations in the city canals of Delft. High pollution levels were especially observed in the inner city canal sediments, probably related to the import of polluted river Rhine water. In contrast, the more-or-less isolated outer city sites were generally much less polluted. Regression analysis on the database generally showed highly significant correlations between individual heavy metal contents. The heavy metal contents were usually significantly correlated with polycyclic aromatic hydrocarbons (PAHs) as well. This points to one or more common sources for these micropollutants. Factor analysis and the K-means cluster analysis technique were applied on the above database; it showed a large cluster of stations, nearly all located in the outer city of Delft, characterized by relatively low heavy metal and organic micropollutants’ contents. Another cluster of 18 stations, mostly located in the inner city of Delft, possessed intermediate pollution levels, directly related with the supply of river Rhine water. Finally, the stations of a third cluster, situated in the inner city as well, were highly polluted, especially by local pollution sources. The above hypotheses were further supported by a more detailed statistical analysis for a number of inner city stations, together with 10-year river Rhine pollution data.

Evaluation of Heavy Metal Contents in Mudflat Solar Salt, Salt Water, and Sea Water in the Nationwide Salt Pan

2012 ◽  
Vol 41 (7) ◽  
pp. 1014-1019 ◽  
Author(s):  
Hag-Lyeol Kim ◽  
Young-Joo Yoo ◽  
In-Sun Lee ◽  
Gang-Hee Ko ◽  
In-Cheol Kim
Keyword(s):  
Heavy Metal ◽  
Sea Water ◽  
Salt Water ◽  
Solar Salt ◽  
Metal Contents ◽  
Salt Pan

Heavy Metal Contents and Safety Evaluation of Commercial Salts in Seoul

2012 ◽  
Vol 41 (1) ◽  
pp. 129-135 ◽  
Author(s):  
Ae-Kyung Kim ◽  
Sung-Ja Cho ◽  
Jae-Eun Kwak ◽  
Jin-Young Kum ◽  
Il-Young Kim ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Safety Evaluation ◽  
Metal Contents

Effect of some Soil Properties on Heavy Metal Contents in Soil Qena Governorate.

2017 ◽  
Vol 8 (9) ◽  
pp. 401-409
Author(s):  
M. Ibrahim ◽  
A. Abd El-Galil ◽  
O. Negim ◽  
M. Nazir
Keyword(s):  
Heavy Metal ◽  
Soil Properties ◽  
Metal Contents

Metallic pollution in clogging materials of urban porous pavements

1995 ◽  
Vol 32 (1) ◽  
pp. 57-62 ◽  
Author(s):  
Valérie Colandini ◽  
Michel Legret ◽  
Yves Brosseaud ◽  
Jean-Daniel Baladès
Keyword(s):  
Heavy Metal ◽  
Particle Size ◽  
Road Traffic ◽  
Total Concentration ◽  
Extraction Procedure ◽  
Interaction Strength ◽  
Metal Mobility ◽  
Residual Fraction ◽  
Metal Contents ◽  
Copper Zinc

Porous pavements infiltrated with stormwater are faced with clogging problems: runoff particles seep and clog the pervious surface layer of these structures. Clogging material samples (in the form of sludge) have been collected in cleaning operations on the pervious asphalt. This study aims at characterizing these materials, particle size distribution, heavy metal contents by particle size, and studying interactions between metals and particles. A sequential extraction procedure proposed by the experts of the Community Bureau of Reference (B.C.R.) was applied to provide information about heavy metal distribution on particles and to evaluate interaction strength, and consequently potential metal mobility when chemical variations occurred in the environment. Mainly made up of sand, the materials are polluted with lead, copper, zinc and cadmium. The concentrations appeared to be linked with road traffic intensity. The heavy metal contents by particle size showed that the finer are the particles, the higher are the heavy metal concentrations. Heavy metals were found potentially labile; metals contents in the residual fraction (mineral fraction) represented less than 20 % of the total concentration. Cadmium and zinc were apparently more labile than lead and copper.

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