NDLI: Application of neural-based modeling in an assessment of pollution with mercury in the middle part of the Warta River

Content Provider	Springer Nature Link
Author	Boszke, Leonard Astel, Aleksander
Copyright Year	2008
Abstract	The level of pollution with various mercury species (organomercury, water- and acid-soluble mercury, mercury bound to humic matter and to sulphides) of the floodplain soils and sediments from middle part of the Warta River has been assessed using self-organizing maps (SOM). Chemometric evaluation allowed identification of moderately (median 173−187 ng g−1, range 54–375 ng g−1 in soil and 130 ng g−1, range 47–310 ng g−1 in sediment) and heavily polluted samples (662 ng g−1, range 426–884 ng g−1). Heavily polluted were located mainly below and in the area of the Poznań city. Statistical comparison of mercury species distribution in floodplain soils of the Warta River shows different patterns for moderately and heavily polluted samples. In heavily polluted soils the contribution of mobile mercury (sum of organomercury species, water- and acid soluble species) is lower (4.2%) than in moderately polluted soils (6.1%). Higher contribution of mobile mercury was observed in sediments of the Warta River (12%). In case of moderately polluted samples, statistical differences in the contribution of mercury species are relatively low and thus the environmental risk from mercury deposited in aquatic system of the Warta River is relatively low. However, higher water levels and heavy floods may incite remobilisation of some organomercuries (2.2–2.9 ng g−1 in soil and 10 ng g−1 in sediment) and acid-soluble species of mercury (2.6–2.9 ng g−1 in soil and 0.5 ng g−1 in sediment).
Starting Page	133
Ending Page	147
Page Count	15
File Format	PDF
ISSN	01676369
Journal	Environmental Monitoring and Assessment
Volume Number	152
Issue Number	1-4
e-ISSN	15732959
Language	English
Publisher	Springer Netherlands
Publisher Date	2008-05-30
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Environmetrics Neural networks Self-organising maps Mercury Fractionation Sequential extraction Sediments Floodplain soils Poznań city Warta River Poland Environmental Monitoring/Analysis Environmental Management Ecotoxicology Atmospheric Protection/Air Quality Control/Air Pollution Ecology
Content Type	Text
Resource Type	Article
Subject	Pollution Medicine Management, Monitoring, Policy and Law

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
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