Evaluation of redox-sensitive metals in marine surface sediments influenced by the oxygen minimum zone of the Humboldt Current System, Northern Chile-中国期刊网

摘要 Upwellingcoastalsystemscanbeusedtounderstandhowdissolvedoxygenandbiologicalproductivitycontroltheaccumulationofredox-sensitivemetalsinmarinesediments.Thealuminium(Al),cadmium(Cd),iron(Fe),nickel(Ni),molybdenum(Mo),vanadium(V),totalorganiccarbon(TOC),totalnitrogen(TN)andtotalsulfur(TS)contentsinsurficialsedimentcollectedfromdifferentwaterdepths(30,70,and120m)inthreenorthernChileanbaysinfluencedbycoastalupwellingandoxygenminimumzones(OMZs)weremeasured.Principalcomponentanalysis(PCA),clusteranalysis,andSpearman'srankcorrelationwereusedtoidentifythemechanismsresponsiblefortheredox-sensitivemetalaccumulation.Thecontentofredox-sensitivemetalsandorganiccomponentsinsedimentincreasedwithincreasingwatercolumndepth,whereaslithogenicmetalsdecreased.IntheMejillonesdelSurandCalderabays,theenrichmentfactorsoftheredox-sensitivemetalsshowedenrichmentforallmetalswithdepth.TheCdandVenrichmentsaremainlytheproductofbiogenicflowtotheseabed,andtheMoandNienrichmentsareduetopreservationunderlowsubsurfaceoxygenconditions.Sulfatereductionisnotanimportantmechanismintheaccumulationofredox-sensitivemetalsinthesedimentofthethreebays.ThePCAshowedthatthebehaviorsoftheredox-sensitivemetalsandorganiccomponentsreflectdifferencesintheeffectsoftheOMZinsedimentalongthecoastofnorthernChile,withamoreintenseOMZinMejillonesdelSurbayandweakerOMZsinCalderaandInglesabays.However,thehighdegreeofenrichmentinredox-sensitivemetalsinCalderaBaycanbeattributedtotheintenseactivityoftheminingindustrynearthebay,asituationthatproducesgeochemicalbehaviorsimilartothatobservedinMejillonesdelSurBay.

1Chengcong Liao;Dongsheng Jeng. Wave-current-induced soil response in marine sediments.力学,2013-01.
2陈正新;董架平;李绍全;袁红明;王保军. Distribution Pattern of Heavy Metals in the Surface Sediments of the Jiaozhou Bay.海洋科学,2005-02.
3Weihai Xu;Wen Yan;Zhong Chen;Han Chen;Weixia Huang;Tian Lin. Organic Matters and Lipid Biomarkers in Surface Sediments from the Northern South China Sea： Origins and Transport.地质学,2014-01.
4. Current Activity Characteristics of the Fault Zone Along the Northern Margin of West Qinling Range Revealed by GPS Measurementl.地震学,2000-02.
5. Distribution　of　dominant　species　and　abundance　of　nannofossils　in　surface　sediments　of　the　central　and　northern　partsof　the　South　China　Sea──Comparison　and　discussion.海洋科学,1995-04.
6Imen BEL HADJ ALI;Zoubeir LAFHAJ;Mounir BOUASSIDA;Imen SAID. Characterization of Tunisian marine sediments in Rades and Gabes harbors.地球物理学,2014-03.
7JunweiLi;KyunghuiOh;HyukYu. SURFACE REARRANGEMENTS OF OXYGEN PLASMA TREATED POLYSTYRENE： SURFACE DYNAMICS AND HUMIDITY EFFECT.高分子化学,2005-02.
8WUYongwen LIZhong XIHongxia XIAQibin. A REVIEW OF OXYGEN-CONTAINING SURFACE GROUPS AND SURFACE MODIFICATION OF ACTIVATED CARBON.高分子化学,2004-01.
9Jian ZHENG Masatoshi Yamada. Development of highly sensitive analytical methods for radionuclides in marine environmental studies.地球化学,2006-01.
10ZHANG Hui. The Factors for Transformation between the Fractions of Speciation of Trace Metals in Lake Sediments.地质学,2017-02.

Evaluation of redox-sensitive metals in marine surface sediments influenced by the oxygen minimum zone of the Humboldt Current System, Northern Chile

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Evaluation of redox-sensitive metals in marine surface sediments influenced by the oxygen minimum zone of the Humboldt Current System, Northern Chile

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