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Article: Environmental magnetic responses of urbanization processes: Evidence from lake sediments in East Lake, Wuhan, China

TitleEnvironmental magnetic responses of urbanization processes: Evidence from lake sediments in East Lake, Wuhan, China
Authors
KeywordsEnvironmental magnetism
Rock and mineral magnetism
Issue Date2009
PublisherBlackwell Publishing Ltd. The Journal's web site is located at http://www.blackwellpublishing.com/journals/GJI
Citation
Geophysical Journal International, 2009, v. 179 n. 2, p. 873-886 How to Cite?
AbstractWe present a study on the environmental magnetic response to urbanization processes from nine sediment cores from East Lake in Wuhan, China. The concentration of magnetic particles, heavy metals and organic matter in the upper 2-18 cm of the sediment cores have been significantly elevated due to the input of coarse magnetite grains from industrial (e.g. power generation and steelmaking) and other anthropogenic activities (e.g. vehicle emissions). Concentration-related magnetic parameters, such as magnetic susceptibility (χ), saturation isothermal remanent magnetization and anhysteretic remanent magnetization, are significantly correlated with concentration of heavy metals and organic matter, for example, Pearson's correlation coefficients are 0.921 for χ-Cu, 0.660 for χ-Pb and 0.848 for χ-loss-on-ignition, respectively. The magnetic properties of the lake sediments document the pollution history caused by human impact on the lake catchment during urbanization. The environmental quality of the lake was fairly good before the 1960s. Magnetic, heavy metal and organic matter contents of the sediments were low and relatively constant, which indicates relatively stable natural inputs from the lake catchment. Pollution trends since the 1960s are reflected in downcore magnetic property variations of the lake sediment. The concentration of magnetic particles in the lake sediments started to increase since 1957, when the Wuhan Iron and Steel Company and the Qingshan Thermal Power Plant, which are located upwind of the lake, were built and put into production. Lake pollution was further aggravated since the acceleration of industrialization and urbanization in East Lake area in the 1980s, which is verified by the elevated concentration of heavy metals and organic matter in the sediments. The magnetic mineral concentration in the lake sediment increased continuously until it peaked in the 1990s and has remained a high level since then. These results suggest that magnetic properties respond sensitively to environmental status, and that the magnetic properties of sediments can provide an excellent record of the industrial and anthropogenic history in an urban lake catchment. © 2009 The Authors Journal compilation © 2009 RAS.
Persistent Identifierhttp://hdl.handle.net/10722/72895
ISSN
2015 Impact Factor: 2.484
2015 SCImago Journal Rankings: 1.839
ISI Accession Number ID
Funding AgencyGrant Number
National Natural Science Foundation of China
Funding Information:

This study was supported by the National Natural Science Foundation of China (No. 40474025). The authors thank Mr Weilan Xia at Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, for his generous help in the radionuclide analysis. We also thank Erwin Appel, Andrew Roberts and another anonymous reviewer for their thorough reviews and helpful suggestions that greatly improved the paper.

References

 

DC FieldValueLanguage
dc.contributor.authorYang, Ten_HK
dc.contributor.authorLiu, Qen_HK
dc.contributor.authorZeng, Qen_HK
dc.contributor.authorChan, Len_HK
dc.date.accessioned2010-09-06T06:46:07Z-
dc.date.available2010-09-06T06:46:07Z-
dc.date.issued2009en_HK
dc.identifier.citationGeophysical Journal International, 2009, v. 179 n. 2, p. 873-886en_HK
dc.identifier.issn0956-540Xen_HK
dc.identifier.urihttp://hdl.handle.net/10722/72895-
dc.description.abstractWe present a study on the environmental magnetic response to urbanization processes from nine sediment cores from East Lake in Wuhan, China. The concentration of magnetic particles, heavy metals and organic matter in the upper 2-18 cm of the sediment cores have been significantly elevated due to the input of coarse magnetite grains from industrial (e.g. power generation and steelmaking) and other anthropogenic activities (e.g. vehicle emissions). Concentration-related magnetic parameters, such as magnetic susceptibility (χ), saturation isothermal remanent magnetization and anhysteretic remanent magnetization, are significantly correlated with concentration of heavy metals and organic matter, for example, Pearson's correlation coefficients are 0.921 for χ-Cu, 0.660 for χ-Pb and 0.848 for χ-loss-on-ignition, respectively. The magnetic properties of the lake sediments document the pollution history caused by human impact on the lake catchment during urbanization. The environmental quality of the lake was fairly good before the 1960s. Magnetic, heavy metal and organic matter contents of the sediments were low and relatively constant, which indicates relatively stable natural inputs from the lake catchment. Pollution trends since the 1960s are reflected in downcore magnetic property variations of the lake sediment. The concentration of magnetic particles in the lake sediments started to increase since 1957, when the Wuhan Iron and Steel Company and the Qingshan Thermal Power Plant, which are located upwind of the lake, were built and put into production. Lake pollution was further aggravated since the acceleration of industrialization and urbanization in East Lake area in the 1980s, which is verified by the elevated concentration of heavy metals and organic matter in the sediments. The magnetic mineral concentration in the lake sediment increased continuously until it peaked in the 1990s and has remained a high level since then. These results suggest that magnetic properties respond sensitively to environmental status, and that the magnetic properties of sediments can provide an excellent record of the industrial and anthropogenic history in an urban lake catchment. © 2009 The Authors Journal compilation © 2009 RAS.en_HK
dc.languageengen_HK
dc.publisherBlackwell Publishing Ltd. The Journal's web site is located at http://www.blackwellpublishing.com/journals/GJIen_HK
dc.relation.ispartofGeophysical Journal Internationalen_HK
dc.rightsGeophysical Journal International. Copyright © Blackwell Publishing Ltd.en_HK
dc.subjectEnvironmental magnetismen_HK
dc.subjectRock and mineral magnetismen_HK
dc.titleEnvironmental magnetic responses of urbanization processes: Evidence from lake sediments in East Lake, Wuhan, Chinaen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0956-540X&volume=179&spage=873&epage=886&date=2009&atitle=Environmental+magnetic+responses+of+urbanization+processes:+evidence+from+lake+sediments+in+East+Lake,+Wuhan,+Chinaen_HK
dc.identifier.emailChan, L:chanls@hku.hken_HK
dc.identifier.authorityChan, L=rp00665en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1111/j.1365-246X.2009.04315.xen_HK
dc.identifier.scopuseid_2-s2.0-70350349577en_HK
dc.identifier.hkuros170137en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-70350349577&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume179en_HK
dc.identifier.issue2en_HK
dc.identifier.spage873en_HK
dc.identifier.epage886en_HK
dc.identifier.eissn1365-246X-
dc.identifier.isiWOS:000270652300014-
dc.publisher.placeUnited Kingdomen_HK
dc.identifier.scopusauthoridYang, T=9840350900en_HK
dc.identifier.scopusauthoridLiu, Q=35233767800en_HK
dc.identifier.scopusauthoridZeng, Q=35172377600en_HK
dc.identifier.scopusauthoridChan, L=7403540528en_HK
dc.identifier.citeulike5948752-

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