Sorption and distribution of adsorbed metals in three soils of India

Veeresh, H.; Tripathy, Snehasis; Chaudhuri, D.; Hart, Brian; Powell, M. A.

doi:10.1016/s0883-2927(03)00080-5

Cited by 54 publications

(33 citation statements)

References 27 publications

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“…Metal concentrations in the exchangeable fractions were lower than the detection limits of the analytical technique. Similar results were reported by other authors in uncontaminated soils [4,18]. The second most important fraction for Ni is the reducible fraction, suggesting an association with oxide phases of soils after its mobilization during rock mineral weathering.…”

Section: Fractionation Of Native Metals In the Soil Samplessupporting

confidence: 91%

Distribution and sorption of potentially toxic metals in four forest soils from Hungary

Sipos

2009

Open Geosciences

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Metals of natural and anthropogenic origin behave differently in soils mostly due to their different mobility. In this study, sequential extractions and batch sorption experiments were performed to relate the fractionation of native Ni, Cu, Zn and Pb to the sorption properties of added metals in four soils with contrasting physiochemical characteristics. A significant effect due to sample composition on both the mobility and sorption characteristics of these metals was found. The efficiency of soil components in metal immobilization was in the order of carbonate > organic matter > swelling clay minerals. The partitioning of native metals together with the information gained through the sorption isotherms allows a deeper insight on the fate and behavior of metals in soils with various compositions.

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Section: Fractionation Of Native Metals In the Soil Samplessupporting

confidence: 91%

Distribution and sorption of potentially toxic metals in four forest soils from Hungary

Sipos

2009

Open Geosciences

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“…In addition, this soil exhibited both the largest clay content (230 g kg -1) and proportion of phyllosilicates in the ≤ 2mm soil fraction which, along with the organic carbon content, justify its largest exchange capacity of the four soils. The presence of smectite as the dominant clay ensures high metal sorption capacity (Veeresh et al, 2003) as it provides the soil with high cation exchange capacity, an established factor regulating the sorption of heavy metals by soils (Kuo and Baker, 1980;Hooda and Alloway, 1998;Gomes et al, 2001;Appel and Ma, 2002).…”

Section: Soil Characteristicsmentioning

confidence: 99%

Competitive sorption of cadmium and lead in acid soils of Central Spain

Serrano¹,

Garrido²,

Campbell³

et al. 2005

Geoderma

195

104

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SummaryThe bioavailability and ultimate fate of heavy metals in the environment are controlled by chemical sorption. To assess competitive sorption of Pb and Cd, batch equilibrium experiments (generating sorption isotherms) and kinetics sorption studies were performed using single and binary metal solutions in surface samples of four soils from central Spain. For comparisons between soils, as well as, single and binary metal solutions, soil chemical processes were characterized using the Langmuir equation, ionic strength, and an empirical power function for kinetic sorption. In addition, soil pH and clay mineralogy were used to explain observed sorption processes. Sorption isotherms were well described by the Langmuir equation and the sorption kinetics were well described by an empirical power function within the reaction times in this study.Soils with higher pH and clay content (characterized by having smectite) had the greatest sorption capacity as estimated by the maximum sorption parameter (Q) of the Langmuir equation. All soils exhibited greater sorption capacity for Pb than Cd and the presence of both metals reduced the tendency for either to be sorbed although Cd sorption was affected to a greater extent than that of Pb. The Langmuir binding strength parameter (k) was always greater for Pb than for Cd. However, these k values tended to increase as a result of the simultaneous presence of both metals, that may indicate competition for sorption sites promoting the retention of both metals on more specific sorption sites. The kinetic experiments showed that Pb sorption is initially faster than Cd sorption from both single and binary solutions although the simultaneous presence of both metals affected the sorption of Cd at short times while only a minor effect was observed on Pb. The estimated exponents of the kinetic function were in all cases smaller for Pb than for Cd, likely due to diffusion processes into micropores or interlayer space of the clay minerals which occurs more readily for Cd than Pb. Finally, the overall sorption processes of Pb and Cd in the smectitic soil with the highest sorption capacity of the studied soils are slower than in the rest of the soils with a clay mineralogy dominated by kaolinite and illite, exhibiting these soils similar sorptionrates. These results demonstrate a significant interaction between Pb and Cd sorption when both metals are present that depends on important soil properties such as the clay mineralogy.

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“…Element mobility depends on a complex array of biotic and abiotic sorption and coprecipitation onto different solid phases, such as iron (oxy-) hydroxides, sulfates, and clays (e.g., Bhumbla & Keefer 1994, Hudson-Edwards et al 1999, Brown et al 1999, Nachtegaal & Sparks 2004, Serrano et al 2005. The stability of PTTE-hosting minerals depends on several geochemical parameters, such as pH, Eh, and ionic strength (e.g., Veeresh et al 2003, Nachtegaal & Sparks 2004, microbial activities (Lalonde et al 2007, Jones & Renaut 2007 and climatic conditions (wet-dry cycling, temperature) (Dold & Fontboté 2001, Moncur et al 2005. In order to understand (and ideally prevent) remobilization of trace elements, one needs additional knowledge of trace-element sources, reaction rates and mineralogical pathways.…”

Section: Introductionmentioning

confidence: 99%

The Weathering of a Sulfide Orebody: Speciation and Fate of Some Potential Contaminants

Courtin-Nomade¹,

Grosbois²,

Marcus³

et al. 2009

The Canadian Mineralogist

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Various potentially toxic trace elements such as As, Cu, Pb and Zn have been remobilized by the weathering of a sulfide orebody that was only partially mined at Leona Heights, California. As a result, this body has both natural and anthropogenically modified weathering profiles only 500 m apart. The orebody is located in a heavily urbanized area in suburban Oakland, and directly affects water quality in at least one stream by producing acidic conditions and relatively high concentrations of dissolved elements (e.g., ~500 mg/L Cu, ~3700 mg/L Zn). Micrometric-scale mineralogical investigations were performed on the authigenic metal-bearing phases (less than 10 mm in size) using electron-probe micro-analysis (EPMA), micro-Raman, micro X-ray absorption spectroscopy (mXAS), scanning X-ray diffraction (mSXRD) and scanning X-ray fluorescence (mSXRF) mapping techniques. Those measurements were coupled with classical mineralogical laboratory techniques, X-ray diffraction (XRD) and scanning electron microscopy (SEM). Authigenic metal-bearing phases identified are mainly sulfates (jarosite, epsomite, schwertmannite), Fe (oxy-)hydroxides (goethite, hematite and poorly crystalline Fe products) and poorly crystalline Mn (hydr-)oxides. Sulfates and Fe (oxy-)hydroxides are the two main secondary products at both sites, whereas Mn (hydr-) oxides were only observed in the samples from the non-mining site. In these samples, the various trace elements show different affinities for Fe or Mn compounds. Lead is preferentially associated with Mn (hydr-)oxides and As with Fe (oxy-)hydroxides or sulfates. Copper association with Mn and Fe phases is questionable, and the results obtained rather indicate that Cu is present as individual Cu-rich grains (Cu hydroxides). Some ochreous precipitates were found at both sites and correspond to a mixture of schwertmannite, goethite and jarosite containing some potentially toxic trace elements such as Cu, Pb and Zn. According to the trace element distribution and relative abundance of the unweathered sulfides, this orebody still represents a significant reservoir of potential contaminants for the watershed, especially in the non-mining site, as a much greater proportion of sulfides is left to react and because of the lower porosity in this site.

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Sorption and distribution of adsorbed metals in three soils of India

Cited by 54 publications

References 27 publications

Distribution and sorption of potentially toxic metals in four forest soils from Hungary

Distribution and sorption of potentially toxic metals in four forest soils from Hungary

Competitive sorption of cadmium and lead in acid soils of Central Spain

The Weathering of a Sulfide Orebody: Speciation and Fate of Some Potential Contaminants

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