Competitive sorption and desorption of heavy metals by individual soil components

Covelo, Emma F.; Vega, F.A.; Andrade, Liliana María

doi:10.1016/j.jhazmat.2006.09.018

Cited by 255 publications

(128 citation statements)

References 32 publications

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“…The quantities of trace elements in sediments calculated in this study corroborate the results described by Covelo et al (2007), who studied the sorption of heavy metals, and claim that chromium is preferred for adsorbtion by kaolinite and mica, while iron oxides and manganese adsorb lead. Also, the study from Gunawardana et al (2012) states that the granulometric composition of urban sediments and their pollutants varies with a range of factors, such as geographical location (soil characteristics), soil use, and traffic conditions.…”

Section: Resultssupporting

confidence: 89%

Mineralogical and Chemical Characterization of Sediments From Impervious Urban Streets

Juchen¹,

Poleto²,

Boas³

et al. 2017

J. Urb. and Environ. Engng

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Abstract:This study aimed to determine the granulometric and mineralogical composition and the Cr, Ni and Pb trace element content in sediments collected from impermeable streets located in the urban perimeter of Toledo, PR, Brazil. The mineralogical analyses were performed by a diffractometer, the granulometric analyses by integrated sieving methods and laser diffraction, and the analyses of the trace elements in quartered fractions of the sediments were carried out by optical emission spectrometry with inductively coupled plasma (ICP-OES). It was concluded that the sediments had an average granulometry greater than 0.09 mm, with finer fractions represented by clay. The mineralogy identified ferruginous substances characteristic of Distroferric Red Latosol DRL, with a high presence of quartz and diopside. Statistically, it was shown that the sediment samples were significantly enriched with the trace elements Chromium and Nickel in the central area streets and with Lead in lower concentrations in the streets in the peripheral areas. The sediments have an average particle diameter greater than 0.09 mm, represented by sand, with fine sediments representing 2 to 6% of the samples. The software indicated that the sediments are from different anthropogenic sources. The diffractograms show peaks for quartz and diopside. Enrichment by trace elements was significant for chromium and nickel in the downtown area streets.

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Section: Resultssupporting

confidence: 89%

Mineralogical and Chemical Characterization of Sediments From Impervious Urban Streets

Juchen¹,

Poleto²,

Boas³

et al. 2017

J. Urb. and Environ. Engng

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“…A high K d value indicates high metal retention by the solid phase through chemical reactions, leading to low metal bioavailability. Similarly, a low K d value indicates that a high metal amount remains in the solution [20], [21], [24]- [27]. Therefore, a further analysis of the obtained data based on the distribution coefficients was done.…”

Section: B Sorption Of CD Cu Ni Pb and Zn Metals On Natural Zeolitementioning

confidence: 99%

Removal of Heavy Metals from Aqueous Solution by Zeolite in Competitive Sorption System

Shaheen¹,

Derbalah²,

Moghanm³

2012

IJESD

111

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Abstract-In this study, the sorption behaviour of natural (clinoptilolite) zeolites with respect to cadmium (Cd), copper (Cu), nickel (Ni), lead (Pb) and zinc (Zn) has been studied in order to consider its application to purity metal finishing wastewaters. The batch method has been employed, using competitive sorption system with metal concentrations in solution ranging from 50 to 300 mg/l. The percentage sorption and distribution coefficients (K d ) were determined for the sorption system as a function of metal concentration. In addition lability of the sorbed metals was estimated by DTPA extraction following their sorption. The results showed that Freundlich model described satisfactorily sorption of all metals. Zeolite sorbed around 32, 75, 28, 99, and 59 % of the added Cd, Cu, Ni, Pb and Zn metal concentrations respectively. According to the percentage sorption and distribution coefficients values, the selectivity sequence of studied metals by zeolite can be given as Pb > Cu > Zn > Cd > Ni. About 57, 47, 78, 22, and 29 % from the total sorbed Cd, Cu, Ni, Pb and Zn recovered by DTPA indicating that lability of the adsorbed Ni was higher than, Cd, Cu, Zn, and Pb respectively. These results show that natural zeolites hold great potential to remove cationic heavy metal species from industrial wastewater.

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“…adsorption and surface precipitation) onto soil colloids, a mechanism strongly related to their peculiarities, such as the clay-oxideshydroxides quality and content, inorganic carbon, cation exchange capacity and pH conditions (Covelo et al, 2007;Flogeac et al, 2007;James and Bartlett, 1983;Palmer and Puls, 1994;Stewart et al, 2003).…”

Section: Introductionmentioning

confidence: 99%

Soil humic acids may favour the persistence of hexavalent chromium in soil

Leita

Margon

Pastrello

et al. 2009

Environmental Pollution

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The interaction between hexavalent chromium Cr(VI), as K 2 CrO 4 , and standard humic acids (HAs) in bulk solution was studied using three complementary analytical methods: UV-Visible spectroscopy, X-ray absorption spectroscopy and differential pulse stripping voltammetry. The observed UV-Vis and X-ray absorption spectra showed that, under our experimental conditions, HAs did not induce reduction of Cr(VI) to its trivalent chemical form. The interaction between Cr(VI) and HAs has rather led to the formation of Cr(VI)-HAs micelles via supramolecular chemical processes. The reported results could contribute towards explaining the relative persistence of ecotoxic hexavalent chromium in soils.

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Competitive sorption and desorption of heavy metals by individual soil components

Cited by 255 publications

References 32 publications

Mineralogical and Chemical Characterization of Sediments From Impervious Urban Streets

Mineralogical and Chemical Characterization of Sediments From Impervious Urban Streets

Removal of Heavy Metals from Aqueous Solution by Zeolite in Competitive Sorption System

Soil humic acids may favour the persistence of hexavalent chromium in soil

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