Adsorption of Cu and Pb on Goethite in the Presence of Low-Molecular Mass Aliphatic Acids

Perelomov, Leonid; Cozzolino, Vincenza; Pigna, Massimo; Violante, A.

doi:10.1080/01490451.2011.559303

Cited by 14 publications

(6 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The adsorption of DOM also makes colloidal minerals more resistant to coagulation at higher ionic strengths and limits dissolution from mineral surfaces, but DOM adsorption itself is strongly mineraland pH-dependent (Smith 1999;Tombácz et al 2013;Philippe and Schaumann 2014). Moreover, adsorbed DOM will also alter the adsorption of TE at mineral surfaces (i.e., "ternary complexes"), which may be enhanced or diminished depending on mineral type, the concentration of DOM, pH, ionic strength, and the order of contact (i.e., TE introduced to mineral before organic ligand, vice-versa, or at the same time) (Turner 1995;Schmitt et al 2002;Sharma et al 2010;Perelomov et al 2011;Violante et al 2003Violante et al , 2010Refaey et al 2017;Zhou et al 2017). These latter interdependencies between the variables governing the dynamics of TE-bearing materials underscore the complexity of interactions and behaviour in the colloidal phase.…”

Section: Dom Concentrationmentioning

confidence: 99%

“…It is, however, necessary to again emphasize that the impact of DOM from any particular source also depends on its concentration, and the ambient pH and ionic strength (Buffle et al 1998;Wilkinson and Reinhart 2005;Baalousha et al 2008;Tercier-Waeber et al 2012;Philippe and Schaumann 2014). Similarly, DOM composition impacts its affinity for reactive sites on the surface of colloidal mineral particles, in turn affecting adsorption and its proclivity for stabilization, flocculation, and TE-binding behaviour in ternary complexes (Schmitt et al 2002;Violante et al 2010;Perelomov et al 2011;Philippe and Schaumann 2014). The composition of adsorbed DOM also impacts TE transformations on the surface of mineral particles, for example through DOM-mediated redox processes (Poublesova and Chefetz 2014).…”

Section: Dom Typementioning

confidence: 99%

See 1 more Smart Citation

Geochemical and biological controls on the ecological relevance of total, dissolved, and colloidal forms of trace elements in large boreal rivers: review and case studies

et al. 2020

View full text Add to dashboard Cite

The concentrations of trace elements (TEs) in large boreal rivers can fluctuate markedly due to changing water levels and flow rates associated with spring melt and variable contributions from tributaries and groundwaters, themselves having different compositions. These fluctuating and frequently high concentrations create regulatory challenges for protecting aquatic life. For example, water quality criteria do not account for changes in flow regimes that can result in TE levels that may exceed regulatory limits, and neither do they account for the markedly different lability and bioaccessibility of suspended solids. This review addresses the geochemical and biological processes that govern the lability and bioaccessibility of TEs in boreal rivers, with an emphasis on the challenges posed by the colloidal behaviour of many TEs, and their relationship to the dissolved fraction (i.e., <0.45 μm in size). After reviewing the processes and dynamics that give rise to the forms and behaviour of TEs in large boreal rivers, their relevance for aquatic organisms and the associated relationships between size and lability and bioaccessibility are discussed. The importance of biological variables and different forms of TEs for limiting lability and bioaccessibility are also addressed. Two case studies emphasize seasonal fluctuations and accompanying changes in the distribution of TE amongst different size fractions and associated colloidal species in large boreal rivers: the Northern Dvina and one of its tributaries, the Pinega River, both in Russia, and the Athabasca River in Alberta, Canada. Water quality in the Athabasca River is briefly discussed with respect to Canadian guidelines.

show abstract

Section: Dom Concentrationmentioning

confidence: 99%

Section: Dom Typementioning

confidence: 99%

Geochemical and biological controls on the ecological relevance of total, dissolved, and colloidal forms of trace elements in large boreal rivers: review and case studies

et al. 2020

View full text Add to dashboard Cite

show abstract

“…However, partition of available surfaces among soil components may affect the selectivity of metals. For example, Perelomov et al (2011) showed that Pb inhibits Cu sorption in soils strongly, but this effect decreases with increasing ratio of available organic surfaces. In the alkaline soil, however, competition resulted in significant differences among the ratios between the sorbed amounts in single element and competitive situations calculated for the studied particle types (Figure 5b).…”

Section: Effect Of Competition On Metal Partition Among Mineral Partimentioning

confidence: 99%

Partition of Cd, Cu, Pb and Zn among mineral particles during their sorption in soils

et al. 2018

View full text Add to dashboard Cite

Purpose. Heterogeneity of soil mineral particles may lead to the misinterpretation of bulk sorption data on their role in metal sorption, which may be resolved through the direct observation of metal distribution among the soil particles after the sorption. Materials and methods. Analytical transmission electron microscopy was used to study metal (Cd, Cu, Pb, Zn) sorption characteristics of clay minerals, Fe-oxyhydroxides and their natural assemblages in soils with contrasting pH under single element and competitive situations. Results and discussion. Iron-oxyhydroxides sorbed higher metal amounts than clay mineral particles mostly, and the sorption capacity of the latter phases were more affected by competition. Iron-oxyhydroxide particles acted as effective metal sorbents in soils not only as individual particles but also as coatings on other mineral particles, and the structural Fe in clay minerals may also resulted in higher metal sorption in some cases. Besides the direct observation of metal sorption onto soil mineral particles, metal precipitates could be identified directly, and the role of organic surfaces in metal sorption could be inferred indirectly in certain cases. Conclusions. Comparison of metal affinity sequences and their partition characteristics between the bulk soil and different mineral particles were found to be an effective tool to specify the most active mineral components in metal sorption at given soil and sorption condition.

show abstract

“…The effect of increasing concentrations of organic ligands on the sorption of metals on soil sorbents has been studied [2,10,14,43,44]. By increasing the initial organic ligand/metal molar ratio, the sorption of the metal on a variable charge mineral initially increases and then decreases as compared to its sorption when added alone.…”

Section: Effect Of Anions and Cations On The Sorption/desorption Of Mmentioning

confidence: 99%

“…Competition in sorption between two or more metals in the presence of organic or inorganic ligands has received scant attention. Perelomov et al [44] studied the effect of increasing concentration of Pb on the sorption of Cu (initial Pb/Cu molar ratio ranging from 0 to 10) at pH 5.0 on goethite, in both the absence and presence of oxalate (OX). The OX was added as a mixture with the heavy metals or 1 h before Cu + Pb addition.…”

Section: Effect Of Anions and Cations On The Sorption/desorption Of Mmentioning

confidence: 99%

Chemical Processes Affecting the Mobility of Heavy Metals and Metalloids in Soil Environments

2015

Self Cite

View full text Add to dashboard Cite

The mobility, bioavailability, and toxicity of metal (-loid)s are influenced by their interactions with phyllosilicates, organic matter, variable charge minerals, and microorganisms. Physicochemical processes influencing the chemistry of metal(-loid)s in soil environments include sorption/desorption, solution complexation, oxidation-reduction, and precipitationdissolution reactions. In particular, the sorption/desorption reactions of metal(loid)s on/from soil sorbents are influenced by pH, nature of soil components, and presence and concentrations of cations and inorganic anions. In recent years, many extraction tests have been used for assessing trace elements mobility and phytoavailability. Chemical speciation of toxic elements may be achieved by spectroscopic analyses (XAS), which provide information about oxidation state, symmetry, and identity of the coordinating ligand environment, and possible solid phases.

show abstract

Adsorption of Cu and Pb on Goethite in the Presence of Low-Molecular Mass Aliphatic Acids

Cited by 14 publications

References 26 publications

Geochemical and biological controls on the ecological relevance of total, dissolved, and colloidal forms of trace elements in large boreal rivers: review and case studies

Geochemical and biological controls on the ecological relevance of total, dissolved, and colloidal forms of trace elements in large boreal rivers: review and case studies

Partition of Cd, Cu, Pb and Zn among mineral particles during their sorption in soils

Chemical Processes Affecting the Mobility of Heavy Metals and Metalloids in Soil Environments

Contact Info

Product

Resources

About