scholarly journals Metal Contents in Water, Sediment, and Oligochaeta-Chironomidae of Lake Uluabat, a Ramsar Site of Turkey*

2010 ◽  
Vol 10 ◽  
pp. 1269-1281 ◽  
Author(s):  
Naime Arslan ◽  
Burcu Koç ◽  
Arzu Çiçek
Keyword(s):  
Lake Water ◽  
Point Of View ◽  
Metal Level ◽  
Ramsar Site ◽  
Copper Nickel ◽  
Water And Sediment ◽  
Metal Contents ◽  
Potamothrix Hammoniensis

Samples of lake water and sediment, and sediment and two dominant zoobenthic taxa (Oligochaeta:Potamothrix hammoniensisand Chironomidae:Chironomus[Camptochironomus] tentans larvae), were collected from 12 stations in Lake Uluabat and examined from the metal level point of view (cadmium, chromium, lead, copper, nickel, and zinc). Our results showed that the occurence of metals in water, sediment, and the two zoobenthic taxa are relatively high. The opinion that supports the results of Lake Uluabat shows that certain species of oligochaetes and chironomids accumulate examined metals several times over compared to their surroundings. Therefore, it is concluded that the oligochaetes and the chironomids are suitable candidates to be used in biomonitoring surveys of Lake Uluabat.

Seasonal Variations of 2,4-D in Buckhorn Lake

1985 ◽  
Vol 20 (1) ◽  
pp. 106-117 ◽  
Author(s):  
E. Nagy ◽  
D.S. Painter
Keyword(s):  
Lake Water ◽  
Seasonal Variations ◽  
Water And Sediment ◽  
Streamflow Data ◽  
Land Runoff

Abstract A five month survey of 2,4-D in Buckhorn Lake water and sediment, combined with streamflow data, produced estimates of the chemical in the lake. The peak concentrations in the water alone were significantly higher than the documented uses would permit. Two distinct concentration peaks were shown by the chemical: one during the June milfoil control season, and one in late August, indicating a release of 2,4-D from the collapsed and decaying milfoil beds. The observed rates of disappearance of the chemical agreed with reported values, showing a limited persistence in the lake. The presence of 2,4-D in the spring sediments was attributed to land runoff.

scholarly journals Evaluation of mineral and heavy metal contents in Croatian blackberry wines

2011 ◽  
Vol 29 (No. 3) ◽  
pp. 260-267 ◽  
Author(s):  
D. Amidžić Klarić ◽  
I. Klarić ◽  
D. Velić ◽  
I. Vedrina Dragojević
Keyword(s):  
Heavy Metal ◽  
Point Of View ◽  
Anthropogenic Source ◽  
Cobalt Chromium ◽  
Manganese Zinc ◽  
Metal Contents ◽  
Copper Manganese ◽  
Calcium Magnesium ◽  
Positive Correlations ◽  
Manganese Magnesium

The mineral and heavy metal contents in 17 commercially available Croatian blackberry wines were determined by FAAS/FAES and GFAAS. The concentrations of potassium, sodium, calcium, magnesium, iron, copper, manganese, zinc, cobalt, chromium, and cadmium were between (in mg/l) 924–1507, 11.81–120.10, 86.4–457.1, 183.4–381.2, 0.082–6.273, 0.058–0.767, 1.47–11.53, 0.247–6.645, and (in µg/l) 3.21–11.89, 10.08–15.88, and 0.55–9.9, respectively. A negative correlation was found between the concentrations of macro (Mg) and micro (Fe) minerals. Furthermore, positive correlations were observed between the concentrations of manganese, cadmium, and cobalt that indicated the origin of these elements in the anthropogenic source. Multivariate analyses (PCA/LDA) showed that the distinct patterns of the metal contents in blackberry wines could be identified with quite satisfactory accuracy (sensitivity and specificity) with the subregion of the origin. In regard to the results obtained, Croatian blackberry wines could be considered as safe from the health risk point of view and as a good additional source of the essential nutrients investigated such as manganese, magnesium, and potassium.

Tidal Movement Characteristics Outside the Pearl River Estuary and Its Influence on the Mouths

2009 ◽  
Author(s):  
Jun Kong ◽  
Xiaoxiao Xue ◽  
Ronghui Ye
Keyword(s):  
River Estuary ◽  
Tidal Energy ◽  
Pearl River Estuary ◽  
Point Of View ◽  
Pearl River ◽  
The Pearl River Estuary ◽  
Water And Sediment ◽  
Amphidromic Point ◽  
Tidal Movement ◽  
The Pearl River

The hydrology of the Pearl River Estuary is controlled both by river discharge and tide, where water and sediment move through eight outlets (mouths) into the sea. Using numerical modeling, this paper examines the characteristics of tidal movement in Pearl River Estuary. Results showed an amphidromic point near Modaomen mouth, and river runoff flows down. From marine dynamics point of view, Modaomen mouth is the main channel for water and sediment transportation of Pearl River. Using the tidal energy, we discuss the change of the sediment near the several entrances during the flood and dry seasons.

Periodicity of Coliform Bacteria in an Aquatic Environment

1999 ◽  
Vol 40 (7) ◽  
pp. 151-157 ◽  
Author(s):  
U. S. Bagde ◽  
A. K. Rangari
Keyword(s):  
Lake Water ◽  
Water Body ◽  
Seasonal Variations ◽  
Bacterial Population ◽  
Winter Season ◽  
Total Coliform ◽  
Seasonal Distribution ◽  
Point Of View ◽  
Coliform Bacteria ◽  
Drinking Purposes

The present study deals with enumeration and seasonal distribution of total and faecal coliform bacteria, the indicators of microorganisms causing faecal pollution of the aquatic ecosystem by a multiple tube technique. A lake called Upvan lake of Thane city, India was investigated during 1996-97 for the purpose. Bacterial population varied with seasonal variations in the water body. Bacterial counts increased during summer months and lowered during winter months. Highest coliform counts were reported in monsoon and lowest in winter season. Samples collected from different sites of the lake showed wide variations in the counts of bacteria. Positive correlation was established between faecal and total coliform. Bacteriological analysis of lake water indicated that water was polluted by faecal contaminants to the extent that it was unportable for drinking purposes and unsuitable from the recreation point of view and hence needed thorough impoundment.

Lake Water and Sediment

1958 ◽  
Vol 3 (4) ◽  
pp. 459-475 ◽  
Author(s):  
F. R. HAYES ◽  
J. E. PHILLIPS
Keyword(s):  
Lake Water ◽  
Water And Sediment
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