Kinetic Study of the Speciation of Copper (II) Bound to Humic Acid

Bonifazi, M.; Pant, Bhuvan C.; Langford, Cooper H.

doi:10.1080/09593331708616457

Cited by 19 publications

(16 citation statements)

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“…1a. The results show that xyloglucan adsorbed on cellulose while no sorption was observed for pectin, although the experiment was conducted for 72 h. Moreover, equilibrium was reached for xyloglucan after approximately 3-4 h. A brief analysis of the kinetics may give some insights into the mechanism of the process, as has been shown in numerous papers (Bonifazi et al 1996;Marczewski 2007Marczewski , 2010Marczewski , 2011Deryło-Marczewska et al 2010;Marczewski et al 2013). The commonly applied procedure concerning adsorption kinetics data analysis is an application of the first order (FO) and second order (SO) kinetic equation in linear forms as it was depicted in Fig.…”

Section: Adsorption Kineticsmentioning

confidence: 83%

“…Therefore, the equilibrium adsorption value was calculated using this model. Further analysis of the kinetics of the process involved a multiexponential equation, which allowed representing the whole adsorption kinetics as a linear combination of several first order processes (Deryło-Marczewska et al 2010;Bonifazi et al 1996;Marczewski 2011):…”

Section: Adsorption Kineticsmentioning

confidence: 99%

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Revision of adsorption models of xyloglucan on microcrystalline cellulose

et al. 2016

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Interactions among cellulose, hemicellulose and pectins are important for plant cell wall assembly and properties and also for industrial applications of these polysaccharides. Therefore, binding of pectin and xyloglucan on microcrystalline cellulose was investigated in this experiment by adsorption isotherms, zeta potential and scanning electron microscopy (SEM). Analysis of three isotherm models (Langmuir, Freundlich and Fowler-Guggenheim isotherms) showed that the experimental adsorption isotherm was well described via the Fowler-Guggenheim model, which includes lateral interaction between the adsorbate. The adsorption isotherm and zeta potential measurement showed that at temperature 25°C only xyloglucan adsorbed on the microcrystalline cellulose. In case of xyloglucan on cellulose, the equilibrium was reached in about 3-4 h, and the kinetics of adsorption were well described by the multiexponential equation. Analysis of the model suggests that two steps can be distinguished: diffusion and reconformation in an adsorbed layer. No adsorption of pectin was observed in this study. SEM study showed that xyloglucan may prevent cellulose from aggregation.

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Section: Adsorption Kineticsmentioning

confidence: 83%

Section: Adsorption Kineticsmentioning

confidence: 99%

Revision of adsorption models of xyloglucan on microcrystalline cellulose

et al. 2016

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“…However, this approach is generally used with water samples (Cabaniss, 1990;Chakrabarti et al, 1994;Lu et al, 1994) and sometimes with model compounds such as fulvic acids (Langford and Gutzman, 1992;Lavigne et al, 1987), humic acids (Bonifazi et al, 1996;Rate et al, 1992) or iron or manganese oxides (Backes et al, 1995;Gutzman and Langford, 1993). In these cases, most of the authors were more interested in the determination of the global constants of complex dissociation.…”

Section: Introductionmentioning

confidence: 98%

A kinetic approach to predict soil trace metal bioavailability: preliminary results

Bermond¹,

Varrault²,

Sappin‐Didier

et al. 2005

Plant Soil

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The presence of large amounts of trace metals creates a hazard in some soils that is strongly related to the speciation of these metals. The aim of this work was to apply an operationally defined fractionation based on kinetics, which could distinguish ''labile'' (quickly extracted) and ''non-labile'' (or slowly labile i.e. slowly extracted) cations by using the extraction kinetics of trace metals by EDTA. This kinetic fractionation was applied to 10 unpolluted soil samples from Burgundy (France) in order to determine their labile concentrations of lead and cadmium. According to this method, cadmium was found to be more mobile than lead, with respect to both labile concentration and the kinetic constants. Moreover, it was also found that the labile concentration of cadmium was related (R 2 = 0.6) to its concentration in wheat shoots; however, no such correlation was found for lead.

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“…Cu 2+ is a heavy metal ion occurring widely in soils and water, the content of which always exceeds its environmental quality standard. The sorption behavior of Cu 2+ on HA from various sources has been widely investigated [10][11][12][13]. It is very important to study the sorption behavior and mechanism of complex pollutants combining heavy metal ions and toxic organic pollutants on HA, which may help to uphold environmental standards for complex pollutants.…”

Section: Introductionmentioning

confidence: 99%

Competitive sorption behavior of copper(II) and herbicide propisochlor on humic acids

Huang

et al. 2005

Journal of Colloid and Interface Science

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Kinetic Study of the Speciation of Copper (II) Bound to Humic Acid

Cited by 19 publications

References 0 publications

Revision of adsorption models of xyloglucan on microcrystalline cellulose

Revision of adsorption models of xyloglucan on microcrystalline cellulose

A kinetic approach to predict soil trace metal bioavailability: preliminary results

Competitive sorption behavior of copper(II) and herbicide propisochlor on humic acids

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