排序方式： 共有70条查询结果，搜索用时 15 毫秒
51.
I. A. Nemirovskaya 《Oceanology》2006,46(3):348-357
The data on the content and composition of lipids and aliphatic hydrocarbons (HC) in aerosols and surface waters obtained during the spring-summer periods of 2001 and 2003 along the vessel route from the North Sea to the Antarctic and backwards are presented. It was shown that the distribution of organic compounds is caused by the influence of the zonal supply of eolian matter from land, anthropogenic, and marine autochtonous sources. The concentrations of organic compounds in the aerosols varied from 0.22 to 13.04 ng/m3 for the lipids and from 0.04 to 7.03 ng/m3 for the aliphatic HC; in the surface waters, it from 9 to 84 and from 1 to 53 μg/l, respectively. There is a correlation between the fluxes of the lithogenic fraction of the aerosols, HC, and lipids. The growth of the aquatic area productivity increases the levels of the HC in the surface waters but to a lower degree than the HC supply with oil contamination. 相似文献
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I. A. Nemirovskaya 《Geochemistry International》2008,46(4):378-385
Aliphatic and polycyclic aromatic hydrocarbons were examined in the surface layer of bottom sediments from the eastern part of the Sakhalin shelf (the materials were sampled in the summer of 2002). The concentrations of hydrocarbons were determined to have changed since the beginning of the development of oil fields (compared with earlier years). According to the distribution of markers in the hydrocarbon compositions, the bottom sediments are dominated by allochthonous (terrigenous) hydrocarbons, which are the most stable compounds. The presence of transformed anthropogenic oil alkanes, which have never been found before, may be indicative of the increasing pollution of the region. 相似文献
53.
I. A. Nemirovskaya 《Geochemistry International》2007,45(7):638-651
The abundances and compositions of aliphatic hydrocarbons (AHC) and polyaromatic hydrocarbons (PAH) were investigated in the water and bottom sediments of the southwestern Amur Bay in the Sea of Japan. The water contained from 0 to 129 μg/1AHC (averaging 42.2 μg/l) and from 5 to 85 ng/l PAH (averaging 18 ng/l). The bottom sediments contained 168–2098 μg/g AHC and 7.2–1100 ng/g dry mass PAH. It was shown that the input of anthropogenic HC is better recorded by molecular markers than the distribution of AHC and PAH concentrations. The discovery of elevated HC concentrations in the bottom water layer suggests that the bottom sediments induced secondary contamination of the water body. 相似文献
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55.
I. A. Nemirovskaya 《Water Resources》2012,39(5):533-545
Studies of water, suspension, and sediments of the Volga R. (from Konakovo Town to the delta) showed that at the confluence with tributaries, diffusion and dilution play the major role. Changes in conductivity, Biochemical oxygen demand (BOD5), pH, suspension, chlorophyll a, dissolved and organic carbon, lipids, and hydrocarbons take place mostly under the effect of natural processes. Typical features in the case of summer low-water period are low chlorophyll a, suspension, and BOD5. The accumulation of pollutants takes place in bottom sediments because of an increase in the share of Corg, and hydrocarbons have a petroleum and pyrogenic composition. 相似文献
56.
A study of two classes of hydrocarbons (HCs)—aliphatic and polycyclic aromatic—in suspended matter of the surface waters and bottom sediments of the Northern and Middle Caspian Sea (R/V Nikifor Shurekov, October 2015) is described. It has been determined that oil pollution transported by river runoff and fluid streams flowing from sedimentary formations in the northeastern part are the main sources of hydrocarbons in the river–sea boundaries of the Volga, Terek, and Sulak rivers. 相似文献
57.
Water Resources - High concentrations of hydrocarbons in suspension in surface water were recorded in the mouth area of the Ural River during spring flood, where they averaged 198 (in 2016) and 270... 相似文献
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Klyuvitkin A. A. Kravchishina M. D. Nemirovskaya I. A. Baranov B. V. Kochenkova A. I. Lisitzin A. P. 《Oceanology》2020,60(3):421-423
Oceanology - Abstract—The paper presents the results of systemic oceanological studies of the European part of the Arctic during cruise 75 of the R/V Akademik Mstislav Keldysh. The expedition... 相似文献
59.
Distribution of hydrocarbons in the estuarine area of the Northern Dvina River during seasonal flood
I. A. Nemirovskaya 《Geochemistry International》2011,49(8):815-826
Heavy contaminant load released into the Northern Dvina River during flooding increased the concentrations of aliphatic (AHC)
and polcyclic aromatic (PAH) hydrocarbons in water and bottom sediments. The composition of hydrocarbons was different from
that of the summer low flow season. The concentrations of dissolved and particulate AHC ranged from 12 to 106 and from 192
to 599 μg/l, respectively, and bottom sediments contained from 26.2 to 329 μg/g AHC and 4 to 1785 ng/g PAH. As the transformation
of AHC occurred at low spring temperatures, the alkane composition was shown to be dominated by terrigenous compounds, whereas
more stable PAH showed elevated contents of petrogenic and pyrogenic compounds. It was also shown that the Northern Dvina-Dvina
Bay geochemical barrier prevents contaminant input into the White Sea, i.e., acts as a marginal filter. 相似文献
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Dangerous influence of all kinds of surface pollution on marine environment especially on fishery basins is a part of an ecological
problem. Oil forms are actively spread by intensive navigation and wind-wave activity.
Research into ocean pollution allowed to work out a conception of how to combat it. The essence of this conception consists
in controlling migratory oil forms in water and changing pollution into such forms which can be easily removed from the marine
environment or which are subject to intensive natural biochemical degradation.
For this purpose a number of ecological experiments were carried out. The data received are shown in tables. 相似文献