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581.
Musa Bandowe BA Sobocka J Wilcke W 《Environmental pollution (Barking, Essex : 1987)》2011,159(2):539-549
We determined concentrations, sources, and vertical distribution of OPAHs and PAHs in soils of Bratislava. The ∑14 OPAHs concentrations in surface soil horizons ranged 88-2692 ng g−1 and those of ∑34 PAHs 842-244,870 ng g−1. The concentrations of the ∑9 carbonyl-OPAHs (r = 0.92, p = 0.0001) and the ∑5 hydroxyl-OPAHs (r = 0.73, p = 0.01) correlated significantly with ∑34 PAHs concentrations indicating the close association of OPAHs with parent-PAHs. OPAHs were quantitatively dominated by 9-fluorenone, 9,10-anthraquinone, 1-indanone and benzo[a]anthracene-7,12-dione. At several sites, individual carbonyl-OPAHs had higher concentrations than parent PAHs. The concentration ratios of several OPAHs to their parent-PAHs and contribution of the more soluble OPAHs (1-indanone and 9-fluorenone) to ∑14 OPAHs concentrations increased with soil depth suggesting that OPAHs were faster vertically transported in the study soils by leaching than PAHs which was supported by the correlation of subsoil:surface soil ratios of OPAH concentrations at several sites with KOW. 相似文献
582.
Schiller H Schönfeld W Krasemann HL Schiller K 《Environmental monitoring and assessment》2007,132(1-3):339-350
The aim of environmental surveillance is to monitor known phenomena as well as to detect exceptional situations. Synoptic
monitoring of large areas in coastal waters can be performed by remote sensing using multispectral sensors onboard satellites.
Many methods are in use which enable the detection and quantification of ‘standard algae’ or specific algae blooms using their
known spectral response. The present study focusses on the detection of spectra outside the known range and which are referred
to as exceptional spectra. In a first step observations from a one-year period were used to establish the parameterisation
of what is defined as ‘normal.’ In a second step observations from a different period were used to test the novelty detection
application, i.e. to look for features not occurring in the first period.
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