Metal Ions Binding to Natural Organic Matter Extracted from Wheat Bran: Application of the Surface Complexation Model

Ravat, Corinne; Monteil-Rivera, Fanny; Dumonceau, Jean‐Marc

doi:10.1006/jcis.2000.6782

Cited by 42 publications

(29 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The sequence obtained is similar to the one obtained by Ravat et al for these five metal ions binding to lignocellulosic substrate [41,42].…”

Section: Metal Adsorption Modelingsupporting

confidence: 86%

“…In order to Table 3. simplify the numbers of the adjusting parameters, the proton binding behavior of the lignin can be described using a nonelectrostatic surface complexation model. Lignin contains two major types of functional groups that have strong interactions with metal ions: carboxylic and phenolic groups [41][42][43]. These two types of sites have often been used to describe the metal ion binding to humic substances, which contain carboxylic and phenolic groups as the main surface functional groups [44][45][46].…”

Section: Surface Site Concentrations and Surface Aciditymentioning

confidence: 99%

See 1 more Smart Citation

Adsorption of metal ions on lignin

Guo

Zhang

Shan

2008

Journal of Hazardous Materials

656

242

View full text Add to dashboard Cite

This study investigated the adsorption of the heavy metal ions Pb(II), Cu(II), Cd(II), Zn(II), and Ni(II) on a lignin isolated from black liquor, a waste product of the paper industry. Lignin has affinity with metal ions in the following order: Pb(II) > Cu(II) > Cd(II) > Zn(II) > Ni(II). The adsorption kinetic data can be described well with a pseudosecond-order model and the equilibrium data can be fitted well to the Langmuir isotherm. Metal ion adsorption was strongly dependent on pH and ionic strength. Surface complexation modelling was performed to elucidate the adsorption mechanism involved. This shows that lignin surfaces contain two main types of acid sites attributed to carboxylic-and phenolic-type surface groups and the phenolic sites have a higher affinity for metal ions than the carboxylic sites.

show abstract

“…The sequence obtained is similar to the one obtained by Ravat et al for these five metal ions binding to lignocellulosic substrate [41,42].…”

Section: Metal Adsorption Modelingsupporting

confidence: 86%

Section: Surface Site Concentrations and Surface Aciditymentioning

confidence: 99%

Adsorption of metal ions on lignin

Guo

Zhang

Shan

2008

Journal of Hazardous Materials

656

242

View full text Add to dashboard Cite

show abstract

“…We used the NICA-Donnan approach to model our experimental data and determine proton-binding constants with natural organic matter. We compare our interpretation with those of Ravat et al who first investigated the acid-base properties of the lignocellulosic substrate and its interaction with heavy metals [14,15]. Ravat et al identified functional groups as carboxylic and phenolic functions.…”

Section: Introductionsupporting

confidence: 64%

“…It has been pointed out by several authors [6,14] that for organic matter it is difficult in all experimental procedures to distinguish between carboxyl and phenolic sites merely on the basis on their acidity. It is common to determine the carboxyl acidity by the Ca-acetate method and total acidity by the baryt method [17].…”

Section: Quantification Of Acidic Functional Groupsmentioning

confidence: 99%

Use of a NICA–Donnan approach for analysis of proton binding to a lignocellulosic substrate extracted from wheat bran

et al. 2002

View full text Add to dashboard Cite

The acid-base properties of a lignocellulosic substrate extracted from wheat bran have been investigated. The lignocellulosic substrate was first studied by use of FTIR, XPS, and solid-state 13C NMR to characterize the surface-active groups. Major contributions arise from the presence of carboxylic and phenolic sites. The former are associated with long-chain fatty acids and the latter are constituent units of lignin. All ionizable sites were quantified by use of the Ca-acetate method and by potentiometric titrations in non-aqueous media. Results were compared with those from conductimetric titrations in water and in the presence of barium ions. Protometric titration curves for the lignocellulosic substrate were obtained at several ionic strengths. Data were also treated with the NICA-Donnan model to determine the intrinsic ionization parameters.

show abstract

“…Copper(II) cation, which is one of the most abundant transition metals in soil, exhibits many advantageous features for the application of EPR spectroscopy. With its d 9 -configuration (S = 1/2), it shows a strong deviation from a regular electrondensity distribution. Thus, one can get information about the type of complex formed by an adsorbed species.…”

Section: Introductionmentioning

confidence: 97%