Anthropogenic impacts on mineral weathering: A statistical perspective

dc.contributorUniversidade Estadual Paulista (UNESP)
dc.creatorPacheco, Fernando A.L.
dc.creatorLandim, Paulo M.B.
dc.creatorSzocs, Teodora
dc.date2014-05-27T11:30:31Z
dc.date2016-10-25T18:53:07Z
dc.date2014-05-27T11:30:31Z
dc.date2016-10-25T18:53:07Z
dc.date2013-09-01
dc.date.accessioned2017-04-06T02:36:41Z
dc.date.available2017-04-06T02:36:41Z
dc.identifierApplied Geochemistry, v. 36, p. 34-48.
dc.identifier0883-2927
dc.identifierhttp://hdl.handle.net/11449/76391
dc.identifierhttp://acervodigital.unesp.br/handle/11449/76391
dc.identifier10.1016/j.apgeochem.2013.06.012
dc.identifierWOS:000323939600003
dc.identifier2-s2.0-84880629039
dc.identifierhttp://dx.doi.org/10.1016/j.apgeochem.2013.06.012
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/897091
dc.descriptionCorrespondence Analysis was adopted as tool for investigating the statistical structure of hydrochemical and weathering datasets of groundwater samples, with the main purpose of identifying impacts on mineral weathering caused by anthropogenic activities, namely fertilizing of farmlands. The hydrochemical dataset comprised measured concentrations of major inorganic compounds dissolved in groundwater, namely bicarbonate, silica (usually by-products of chemical weathering), chloride, sulphate and nitrate (typically atmospheric plus anthropogenic inputs). The weathering dataset consisted of calculated mass transfers of minerals being dissolved in loess sediments of a region located in SW Hungary (Szigetvár area), namely Na-plagioclase, calcite and dolomite, and of pollution-related concentrations of sodium, magnesium and calcium. A first run of Correspondence Analysis described groundwater composition in the study area as a system of triple influence, where spots of domestic effluents-dominated chemistries are surrounded by areas with agriculture-dominated chemistries, both imprinted over large regions of weathering dominated chemistries. A second run revealed that nitrification of N-fertilizers is promoting mineral weathering by the nitric acid reaction (anthropogenic pathway), in concurrence with the retreating of weathering by carbonic acid (natural pathway). It also indicated that dolomite and calcite are being players in a dedolomitization process driven by dissolution of gypsum fertilizers and nitrification of N-fertilizers. © 2013 Elsevier Ltd.
dc.languageeng
dc.relationApplied Geochemistry
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.subjectAnthropogenic activity
dc.subjectAnthropogenic impacts
dc.subjectAnthropogenic inputs
dc.subjectChemical weathering
dc.subjectCorrespondence analysis
dc.subjectGroundwater composition
dc.subjectMineral weathering
dc.subjectStatistical structures
dc.subjectCalcite
dc.subjectCarbon dioxide
dc.subjectChlorine compounds
dc.subjectFertilizers
dc.subjectGroundwater
dc.subjectHydrochemistry
dc.subjectInorganic compounds
dc.subjectMinerals
dc.subjectNitrification
dc.subjectSodium
dc.subjectWeathering
dc.subjectagricultural land
dc.subjectanthropogenic effect
dc.subjectcalcite
dc.subjectcorrespondence analysis
dc.subjectdissolution
dc.subjectdolomite
dc.subjectdolomitization
dc.subjecteffluent
dc.subjectfertilizer
dc.subjecthydrochemistry
dc.subjectloess
dc.subjectnitrification
dc.subjectplagioclase
dc.subjectsilica
dc.subjectsodium
dc.subjectweathering
dc.subjectHungary
dc.titleAnthropogenic impacts on mineral weathering: A statistical perspective
dc.typeOtro


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