نتایج جستجو برای: petrogenic and pyrolitic source
تعداد نتایج: 16867566 فیلتر نتایج به سال:
Despite many shipwrecks containing oil there is a paucity of studies investigating their impact on surrounding environments. This study evaluates any potential effect the World War II shipwreck HMS Royal Oak having benthic sediments in Scapa Flow, Scotland. (Her Majesty’s Ship) sank 1939, subsequently leaked 1960s and 1990s, estimated to still hold 697 tonnes fuel oil. In this study, were analy...
Blue mussels (Mytilus edulis) were collected from coastal areas and voes in Shetland and Orkney during March and April 1998 and from various coastal locations around mainland Scotland and from the Islands during October and December 1999. The polycyclic aromatic hydrocarbon concentration and composition (2- to 6-ring parent and branched) were determined for all samples. Additional analysis, inc...
Background and purpose: The Caspian Sea is the largest lake in the world. Due to having a long coastal line, population areas, agricultural and industrial activity its have always been exposed to variety of pollutants. Due to variaty effects of pollutant on aquatic life and human, periodic invest...
The potential sources of 16 PAHs in surface sediments from highly tourism activities of Chalong bay, Phuket province, Thailand were apportioned. Twenty-eight of sediment samples were collected by using van Veen grab Sampler from Chalong bay, Phuket. Quantitative analysis of the 16 PAHs which categorized according to the USEPA was analyzed by Gas Chromatography-Mass Spectrometry (GC/MS). Moreove...
The discovery of a phase transition in Mg-silicate perovskite (Pv) to postperovskite (pPv) at lowermost mantle pressure-temperature (P - T) conditions may provide an explanation for the discontinuous increase in shear wave velocity found in some regions at a depth range of 200 to 400 km above the core-mantle boundary, hereafter the D('') discontinuity. However, recent studies on binary and tern...
in this project, 4,4?-methylenebis(3-chloro-2,6-diethyl trimellitimidobenzene) as a diacid, was prepared by the reaction of trimellitic anhydride (tma) with 4,4?-methylenebis(3-chloro-2,6-diethylaniline) (mcdea). the novel poly(amide-imide) (pai) was synthesized from the reaction of 4,4?-methylenebis(3-chloro-2,6-diethyl trimellitimidobenzene) as a diacid with mcdea under green condition using ...
Polycyclic aromatic hydrocarbons (PAHs) in surface microlayer (SML) and subsurface water (SSW) of Lagos Lagoon were investigated using gas chromatography-electron capture detector (GC-ECD) technique to ascertain their occurrence and spatial distribution, origin, enrichment, and carcinogenicity. Total PAH (ΣPAH) concentrations ranged from 9.10 to 16.20 μg L(-1) in the SML and 8.90 to 13.30 μg L(...
The investigation conducted was dialed to quantitative and qualitative evaluation of 15 priority polycyclic aromatic hydrocarbons (PAHs) Potentially Toxic Elements (Cu, Pb, Zn, Cd, Ni, Cr) is soils cryoconites on “St. Kliment Ohridski” Antarctic station territory its vicinities. Estimation benzo(a)pyrene (BaP)–equivalents, PAHs different isomer pair ratios were used for identification general t...
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