Mobility of heavy metals as related to soil chemical and mineralogical characteristics of Brazilian soils

dc.creatorMatos, Antônio T.
dc.creatorFontes, Mauricio Paulo Ferreira
dc.creatorCosta, Liovando Marciano Da
dc.creatorMartínez, Mauro Aparecido
dc.date2018-05-09T11:23:45Z
dc.date2018-05-09T11:23:45Z
dc.date2000-10-26
dc.date.accessioned2023-09-27T20:51:16Z
dc.date.available2023-09-27T20:51:16Z
dc.identifier0269-7491
dc.identifierhttps://doi.org/10.1016/S0269-7491(00)00088-9
dc.identifierhttp://www.locus.ufv.br/handle/123456789/19403
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/8949444
dc.descriptionIn order to better understand the relationship between soil characteristics and mobility of some heavy metals, correlation studies were conducted in samples of unlimed and limed A, B and C horizons of three Brazilian soils, representative of the majority of the tropical soils. A number of chemical and mineralogical characteristics of one Oxisol and two Ultisols were related to the retardation factors (Rf) for zinc (Zn), cadmium (Cd), copper (Cu) and lead (Pb). The retardation factors, obtained in leaching column experiments, were used as an estimate of solute movement in the profile. Soil types and soil horizons were found to influence metal retardation factors which, in turn, correlated better with the chemical than the mineralogical soil characteristics. For the unlimed soil samples, the soil characteristics that significantly correlated with Zn-Rf and Cd-Rf were the sum of exchangeable bases (SB), and soil exchangeable (Ca-KCl) and non-exchangeable (Ca-HCl) calcium contents. These results showed the strong influence of the cation exchange phenomenon on the retention and mobility of these two metals. For Cu and Pb, not only SB, cation exchange capacity (CEC) and Ca-KCl and Ca-HCl but also the organic matter correlated well with the Rf, showing that complex or chelate formation may play an important role in the movement of these elements. The important soil chemical characteristics related to the retardation factors in the limed soil samples were SB for Cd, and Ca-HCl for Cu and Pb, suggesting that precipitation may also influence the mobility and retention of the latter two heavy metals in these soil samples. Soil pH influenced the heavy metals adsorption and movement as shown by the significant correlation with the retardation factors when the combined data for the unlimed and limed soil samples was considered.
dc.formatpdf
dc.formatapplication/pdf
dc.languageeng
dc.publisherEnvironmental Pollution
dc.relationVolume 111, Issue 3, Pages 429-435, 2001
dc.rightsElsevier Science Ltd.
dc.subjectHeavy metals
dc.subjectRetardation factors
dc.subjectSoil chemical characteristics
dc.subjectSoil pollution
dc.titleMobility of heavy metals as related to soil chemical and mineralogical characteristics of Brazilian soils
dc.typeArtigo


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