Accumulation of Heavy Metals by Individually Analyzed Bacterial Cells and Associated Nonliving Material in Polluted Lake Sediments

1999 ◽  
Vol 33 (21) ◽  
pp. 3795-3801 ◽  
Author(s):  
Togwell A. Jackson ◽  
M. Marcia West ◽  
Gary G. Leppard
Keyword(s):  
Heavy Metals ◽  
Lake Sediments ◽  
Bacterial Cells ◽  
Polluted Lake

scholarly journals SELECTIVE "STAINING" FOR ELECTRON MICROGRAPHY

1942 ◽  
Vol 76 (1) ◽  
pp. 103-108 ◽  
Author(s):  
Stuart Mudd ◽  
Thomas F. Anderson
Keyword(s):  
Heavy Metals ◽  
Cell Walls ◽  
Differential Staining ◽  
Bacterial Cells ◽  
Selective Staining ◽  
Electron Micrography ◽  
Chemical Effects ◽  
Microchemical Analysis ◽  
Cell Components ◽  
Selective Chemical

The physical basis of contrast and image formation in electron micrography is considered in relation to the possibility of recording selective chemical effects on cell components. A technology of selective microchemical analysis, equivalent to differential staining, is suggested as practicable in electron micrography. Electron pictures of bacteria after exposure to salts of heavy metals have shown the bacterial inner protoplasm, but not the cell walls, to be selectively darkened; shrinkage, coagulation, or escape of protoplasm from the injured cells may result and be recorded in the electron micrographs. Recording of the action of germicidal agents on individual bacterial cells is indicated as one promising field of application of microchemical analysis with the aid of the electron microscope.

Enhanced bioaccumulation of heavy metals by bacterial cells displaying synthetic phytochelatins

2000 ◽  
Vol 70 (5) ◽  
pp. 518-524 ◽  
Author(s):  
Weon Bae ◽  
Wilfred Chen ◽  
Ashok Mulchandani ◽  
Rajesh K. Mehra
Keyword(s):  
Heavy Metals ◽  
Bacterial Cells

Efficacy of dredging engineering as a means to remove heavy metals from lake sediments

2019 ◽  
Vol 665 ◽  
pp. 181-190 ◽  
Author(s):  
Musong Chen ◽  
Shiming Ding ◽  
Shuaishuai Gao ◽  
Zhen Fu ◽  
Wanying Tang ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Lake Sediments

Heavy Metals in Sediment Ecosystem of Bhavan’s College Lake of Andheri, Mumbai

2013 ◽  
Vol 13 ◽  
pp. 105-112 ◽  
Author(s):  
P.U. Singare ◽  
M.S. Talpade ◽  
D.V. Dagli ◽  
V.G. Bhawe
Keyword(s):  
Heavy Metals ◽  
Lake Sediments ◽  
Hydride Generation ◽  
Toxic Heavy Metals ◽  
Significant Information ◽  
Aquatic Life ◽  
Yearly Average ◽  
Cold Vapour ◽  
One Year

The present study was initiated to understand the accumulation of toxic heavy metals in sediments of Bhavan’s College Lake of Andheri, Mumbai. The study was performed for a period of one year starting from June 2011 to May 2012 to quantify the toxic heavy metals like Cu, Pb, Cr, Ni, Fe, Hg, As and Cd by atomic absorption spectroscopy technique coupled with cold vapour technique (for Hg analysis) and hydride generation technique(for As analysis). It was observed that the yearly average concentrations of these heavy metals in lake sediments were 0.53, 0.25, 0.42, 0.43, 4.6, 0.14, 0.12 and 0.11 ppm respectively which were above the WHO limits for aquatic life and CPCB limits for inland surface water. These heavy metals accumulated in lake sediments may enter the water thereby creating threat to aquatic life. They may enter the food chain through biomagnifications and may create adverse effect on human health. It is expected that in addition to the water analysis which is practiced for years, sediment analysis performed in the present investigation will help in evaluating quality of the total ecosystem of the lake. It will also provide environmentally significant information about natural and anthropogenic influence on the water body.

Precipitation Loading of Acid and Heavy Metals to a Small Acid Lake near Sudbury, Ontario

1977 ◽  
Vol 34 (5) ◽  
pp. 649-658 ◽  
Author(s):  
R. J. Beamish ◽  
J. C. Van Loon
Keyword(s):  
Heavy Metals ◽  
Lake Sediments ◽  
Lake Water ◽  
Atmospheric Fallout ◽  
Annual Change ◽  
Bulk Precipitation ◽  
Ph Change ◽  
Manganese Zinc ◽  
Measured Change ◽  
High Concentrations

The pH of Lumsden Lake was closely related to the measured amount of acid entering the lake from bulk precipitation. In 1972 it was estimated that an excess of 2135 kg of H2SO4 was added to the lake from the atmosphere. The predicted annual change in lake pH was from 5.2 to 4.8 and the actual measured change was from 5.2 to 4.7. In 1973 an estimated excess of 1271 kg of H2SO4 was added to the lake from the atmosphere. The predicted annual pH change was from 4.8 to 4.7 and there was no net change in the lake pH in 1973.Lumsden Lake also had high concentrations of sulfate, manganese, zinc, and nickel in comparison with remote or "unpolluted" lakes. High concentrations of manganese and possibly some zinc in the lake appeared to result from increased mobilization from the lake sediments or watershed or both as the pH decreased. Atmospheric fallout also contributed substantial quantities of nickel and copper to the watershed, some of which appeared to be retained in the lake water. The high concentrations of lead in the precipitation were not retained in the lake.

Geochemistry of Iron, Sulfur and Related Heavy Metals in Metal-Polluted Taihu Lake Sediments

Pedosphere ◽  
2008 ◽  
Vol 18 (5) ◽  
pp. 564-573 ◽  
Author(s):  
Hong-Bin YIN ◽  
Cheng-Xin FAN ◽  
Shi-Ming DING ◽  
Lu ZHANG ◽  
Ji-Cheng ZHONG
Keyword(s):  
Heavy Metals ◽  
Lake Sediments ◽  
Taihu Lake ◽  
Iron Sulfur

scholarly journals TENDENCIES IN THE CONTENT CHANGE OF HEAVY METALS IN LAKE SEDIMENTS IN NORTHERN FENNOSCANDIA OVER THE LAST CENTURIES

2015 ◽  
pp. 62
Author(s):  
Владимир Андреевич Даувальтер ◽  
Николай Александрович Кашулин ◽  
Дмитрий Борисович Денисов ◽  
Vladimir Dauvalter ◽  
Nikolai Kashulin ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Lake Sediments ◽  
Northern Fennoscandia ◽  
Content Change
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