scholarly journals Humic matter and contaminants. General aspects and modeling metal ion binding

2001 ◽  
Vol 73 (12) ◽  
pp. 2005-2016 ◽  
Author(s):  
Luuk K. Koopal ◽  
Willem H. van Riemsdijk ◽  
David G. Kinniburgh
Keyword(s):  
Heavy Metal ◽  
Humic Substances ◽  
Fresh Water ◽  
Metal Ion ◽  
Heavy Metal Ions ◽  
Ion Binding ◽  
Inorganic Contaminants ◽  
Metal Ion Binding ◽  
Mineral Particles ◽  
Donnan Model

Humic substances are soil and fresh-water components that play an important role in the binding and transport of both organic and inorganic contaminants. Transport of the contaminants due to ground- and fresh-water dynamics is directly related to the risks associated with contaminations. The mobility of soluble humic substances is related to their interaction with soil mineral particles. Some key references for the binding of organic and inorganic contaminants and for the binding of humics to mineral particles are presented. Humic substances also play a role in the analysis of the contaminants in natural waters and with remediation of water or soil polluted with pesticides, heavy metal ions, and radionuclides. These aspects are illustrated with some examples. The problems that are encountered with the modeling of the binding of contaminants to humics and of heavy metal ions in particular are illustrated by considering the nonideal competitive adsorption model (NICA) extended with electrostatic interactions. The NICA-Donnan model gives quite good results for the description of metal ion binding, as is illustrated for metal ion binding to purified peat humic acid (PPHA). Finally, some remarks are made with respect to the use of the NICA-Donnan model in general purpose speciation programs and of simplified versions of the model for predictions under restricted environmental conditions.

scholarly journals Rhodamine-Triazole Functionalized Fe3O4@SiO2 Nanoparticles as Fluorescent Sensors for Heavy Metal Ions

2019 ◽  
Vol 35 (3) ◽  
pp. 1054-1061 ◽  
Author(s):  
Kanokorn Wechakorn ◽  
Pairsunan Chanpanich ◽  
Pimfa Kamkalong ◽  
Suranan Anantachisilp
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Metal Ion ◽  
Heavy Metal Ions ◽  
Fluorescence Emission ◽  
Sio2 Nanoparticles ◽  
Fluorescent Sensors ◽  
Ion Binding ◽  
Metal Ion Binding ◽  
Color Changes

Rhodamine-triazole sensor functionalized Fe3O4@SiO2 nanoparticles were developed for the detection of heavy metal ions, namely Cu2+, Ni2+, Hg2+, Co2+, Fe3+, and Pb2+. Rhodamine conjugated with a triazole moiety (RBT) was utilized as the metal ion binding site. The RBT-Fe3O4@SiO2 nanoparticles were fully characterized by XRD, FTIR, TGA, SEM and TEM techniques. Additionally, RBT-functionalized Fe3O4@SiO2 nanoparticles can be separated from the aqueous phase by application of an external magnet, leading to clear naked-eye observation of the color changes and fluorescence enhancement. From UV-Vis absorption spectra, aqueous solutions of RBT-Fe3O4@SiO2 in the presence of heavy metal ions show an absorption peak at 554 nm. Fluorescence titration experiments reveal that the intensity of the fluorescence emission band at 574 nm is linearly dependent on Cu2+ concentration, over a 100-800 µM range. Furthermore, complexation of Cu2+ by RBT-Fe3O4@SiO2 nanoparticles can induce ring-opening of the rhodamine spirolactam ring followed by hydrolysis, confirmed by mass spectrometry.

Generic NICA−Donnan Model Parameters for Metal-Ion Binding by Humic Substances

2003 ◽  
Vol 37 (5) ◽  
pp. 958-971 ◽  
Author(s):  
Christopher J. Milne ◽  
David G. Kinniburgh ◽  
Willem H. van Riemsdijk ◽  
Edward Tipping
Keyword(s):  
Humic Substances ◽  
Metal Ion ◽  
Model Parameters ◽  
Ion Binding ◽  
Metal Ion Binding ◽  
Donnan Model

Metal Ion Binding to Humic Substances: Application of the Non-Ideal Competitive Adsorption Model

1995 ◽  
Vol 29 (2) ◽  
pp. 446-457 ◽  
Author(s):  
Marc F. Benedetti ◽  
Chris J. Milne ◽  
David G. Kinniburgh ◽  
Willem H. Van Riemsdijk ◽  
Luuk K. Koopal
Keyword(s):  
Humic Substances ◽  
Metal Ion ◽  
Competitive Adsorption ◽  
Ion Binding ◽  
Metal Ion Binding ◽  
Adsorption Model

scholarly journals Cover Feature: Sulfation Patterns of Saccharides and Heavy Metal Ion Binding (Chem. Eur. J. 52/2019)

2019 ◽  
Vol 25 (52) ◽  
pp. 12000-12000 ◽  
Author(s):  
Israel Alshanski ◽  
Joanna Blaszkiewicz ◽  
Evgeniy Mervinetsky ◽  
Jörg Rademann ◽  
Shlomo Yitzchaik ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Metal Ion ◽  
Heavy Metal Ion ◽  
Ion Binding ◽  
Metal Ion Binding

Metal Ion Binding by Humic Acid:  Application of the NICA-Donnan Model

1996 ◽  
Vol 30 (5) ◽  
pp. 1687-1698 ◽  
Author(s):  
David G. Kinniburgh ◽  
Christopher J. Milne ◽  
Marc F. Benedetti ◽  
Jose P. Pinheiro ◽  
Jeroen Filius ◽  
...  
Keyword(s):  
Humic Acid ◽  
Metal Ion ◽  
Ion Binding ◽  
Metal Ion Binding ◽  
Donnan Model

Modeling of heavy metal ion binding by phosphoric acid activated carbon

2004 ◽  
Vol 221 (1-4) ◽  
pp. 421-429 ◽  
Author(s):  
A.M Puziy ◽  
O.I Poddubnaya ◽  
V.N Zaitsev ◽  
O.P Konoplitska
Keyword(s):  
Heavy Metal ◽  
Activated Carbon ◽  
Phosphoric Acid ◽  
Metal Ion ◽  
Heavy Metal Ion ◽  
Ion Binding ◽  
Metal Ion Binding

The structure and heavy-metal-ion-binding sites of horse spleen apoferritin

1980 ◽  
Vol 8 (5) ◽  
pp. 654-655 ◽  
Author(s):  
GEORGE A. CLEGG ◽  
ROBERT F. D. STANSFIELD ◽  
PHILIP E. BOURNE ◽  
PAULINE M. HARRISON
Keyword(s):  
Heavy Metal ◽  
Binding Sites ◽  
Metal Ion ◽  
Heavy Metal Ion ◽  
Ion Binding ◽  
Metal Ion Binding ◽  
Ion Binding Sites ◽  
Metal Ion Binding Sites

Fluorescence Analysis of Cu(II), Pb(II) and Hg(II) Ion Binding to Humic and Fulvic Acids

2016 ◽  
Vol 851 ◽  
pp. 135-140 ◽  
Author(s):  
Vojtěch Enev ◽  
Irena Türkeová ◽  
Jana Szewieczková ◽  
Leos Doskocil ◽  
Martina Klučáková
Keyword(s):  
Humic Substances ◽  
Stability Constants ◽  
Metal Ion ◽  
Fluorescence Analysis ◽  
Fulvic Acids ◽  
Ion Binding ◽  
Conditional Stability ◽  
Metal Ion Binding ◽  
The Stability ◽  
Conditional Stability Constants

Abstract. The aim of this work was to study molecular and quantitative aspects of metal ion binding to humic substances (HS). The object of our study was characterization of two standards of humic substances (Elliott Soil standard HA 1S102H and Elliott Soil standard FA 2S102F). All samples of IHSS standards HS were characterized by elemental analysis (EA), ultraviolet-visible spectroscopy (UV/Vis), Fourier transform infrared spectroscopy (FTIR) and steady-state fluorescence spectroscopy. Chemical parameters on the complexation of Cu (II), Pb(II) and Hg(II), including the conditional stability constants and the percentage of fluorophores participating in the complexation, were estimated by the modified Stern–Volmer equation. The stability constants (log Ka) of Me(II)–ESHS complexes range from 3.70 to 5.15 in the order: Hg–ESHA>Cu–ESHA>Pb–ESHA>Cu–ESFA>Pb–ESFA. With respect to the ESHA, ESFA, which showed the smallest contents of O-containing functional groups (e.g. hydroxyl, carbonyl, ester, especially carboxyl groups on the aromatic ring) and the lowest humification degree, the ESFA was characterized by much smaller stability constants. Our findings suggest that soil HS belongs to class of important organic ligands for complexation with heavy metal ions and may significantly affect the chemical forms, mobility, bioavailability and ecotoxicity of heavy metals in the soil environment.

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