Some Relationships Among the Stabilities of Metal Complexes.

Irving, H. M. N. H.; Rossotti, Hazel

doi:10.3891/acta.chem.scand.10-0072

Cited by 190 publications

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“…DiToro [65] who showed how the Irving-Rossotti [66] approach could be brought to bear to 97 regularise equilibrium constants. Each type A group is assigned an abundance of n A /4 mol g -1 humic matter, and each type B 132 group an abundance of n A /8 mol g -1 .…”

Section: Tipping Et Al Humic Ion-binding Model Vii_revisionmentioning

confidence: 99%

“…We applied the approach and findings of Carbonaro & Di Toro [65] to analyse the Model VII 259 results, by plotting log K MA against  O , the slope of the equation of Irving & Rossotti [66] respectively. Thus log K MA,HA for each metal is expected to be greater than K MA,FA by a factor 266 of 1.11.…”

Section: Data Fitting 215mentioning

confidence: 99%

“…We extended this approach, making use of the study of Carbonaro & 96 DiToro [65] who showed how the Irving-Rossotti [66] approach could be brought to bear to 97 regularise equilibrium constants. 98 99 100…”

Section: Introduction 54mentioning

confidence: 99%

“…Tipping [2] identified both the Humic Ion-Binding Models and NICA 62 as comprehensive models, meaning that they deal with competitive interactions involving all 63 cations (including H + ), and take account of ionic strength effects and metal-proton exchange 64 ratios. They seek to represent cation-binding by the complex mixtures that comprise natural 65 organic matter as efficiently as possible, with the minimum number of parameters, in order to 66 be useful in addressing chemical processes in the environment. A different approach to 67 these parameterised models, but also potentially comprehensive, is the "forward modelling" 68 developed by Cabaniss [6] in which binding is calculated a priori from the known or assumed 69 distributed chemistry of humic substances.…”

Section: Introduction 54mentioning

confidence: 99%

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Humic Ion-Binding Model VII: a revised parameterisation of cation-binding by humic substances

2011

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Article (refereed) -postprintTipping, E.; Lofts, S.; Sonke, J.E.. 2011. Humic Ion-Binding Model VII: a revised parameterisation of cation-binding by humic substances. Environmental Chemistry, 8 (3). 225-235. 10.1071/EN11016Contact CEH NORA team at noraceh@ceh.ac.ukThe NERC and CEH trademarks and logos ('the Trademarks') are registered trademarks of NERC in the UK and other countries, and may not be used without the prior written consent of the Trademark owner. [1,2] incorporating Humic Ion-Binding Model 55 V [3] or VI [4] permits the calculation of equilibrium chemical speciation for waters and soils in 56 which natural organic matter plays a significant role. The ion-binding models are based on 57 conventional chemical reactions involving O-containing weak acids, with empirical estimation 58 of the influence of soft ligand atoms (N, S) and electrostatic corrections, and are 59 parameterised from laboratory studies with isolated humic and fulvic acids. The NICA 60 model [5] is similarly parameterised and provides an alternative picture based on continuous 61 binding-site distributions. Tipping [2] identified both the Humic Ion-Binding Models and NICA 62 as comprehensive models, meaning that they deal with competitive interactions involving all 63 cations (including H + ), and take account of ionic strength effects and metal-proton exchange 64 ratios. They seek to represent cation-binding by the complex mixtures that comprise natural 65 organic matter as efficiently as possible, with the minimum number of parameters, in order to 66 be useful in addressing chemical processes in the environment. A different approach to 67 these parameterised models, but also potentially comprehensive, is the "forward modelling" 68 developed by Cabaniss [6] in which binding is calculated a priori from the known or assumed 69 distributed chemistry of humic substances. 70 Tipping et al. Humic Ion-Binding Model VII_REVISIONWHAM has been applied in a variety of research and regulatory areas. Examples include 71 the acidification of soils [7][8][9][10][11][12][13][14] and surface waters [15] , trace metal behaviour in soils [16][17][18][19][20][21][22] , surface 72 waters [23][24][25][26][27][28][29][30][31] and groundwaters [32] , lake sediment diagenesis [33,34] , rare earth geochemistry [35-73 37] , iron and manganese geochemistry [38][39][40][41] , radionclide geochemistry [42][43][44][45] , organic matter 74 solubility in soils [46,47] , catchment modelling [48,49] , interactions of metals with biota [50,51] , 75 ecotoxicology [52][53][54][55][56][57][58][59] and Critical Loads [60][61][62] . Given this evident utility, it is worthwhile to 76 continue to improve the humic ion-binding model and incorporate new data into its 77 parameterisation. Here we report on activities undertaken towards these goals, namely 78 modification of assumptions about multidentate binding, the fitting of new data, and the 79 introduction of a procedure to obtain more internally-consistent parameters. 80Changes in binding site formulation were prompte...

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Section: Tipping Et Al Humic Ion-binding Model Vii_revisionmentioning

confidence: 99%

Section: Data Fitting 215mentioning

confidence: 99%

Section: Introduction 54mentioning

confidence: 99%

Section: Introduction 54mentioning

confidence: 99%

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Humic Ion-Binding Model VII: a revised parameterisation of cation-binding by humic substances

2011

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“…Irving and Rossotti (21) were the first to seriously propose the use of graphical correlations of the nature of those under discussion for their prophetic value in Analytical Chemistry, and have discussed the thermodynamic equations underlying each of the correlations they propose. In this work, they attempt to show that the substituent effects for two closely related metals should approach a theoretical equality, and cite the data for nickel(II).…”

Section: Review Of Literaturementioning

confidence: 99%

The substituent effect in transition metal complexes of 1, 10-phenanthroline

Bystroff

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Kinetics and mechanism of hydrogen peroxide oxidation of chromone-3-carboxaldehydes in aqueous acid and micellar media

Matha¹,

Sundari²,

Rajanna³

et al. 1996

Int. J. Chem. Kinet.

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Oxidation of chromone-3-carboxaldehyde (CCA) and substituted analogues by H,O, has been carried out in aqueous acid (HCI and H,SO, 1 and micellar media. Reaction kinetics indicated order in ICCAl as well as [H,O,I to be unity while it is a fraction ( I > n > 0) in [acid]. Reaction rates were found to be faster in the solvents of low-dielectric constant I D ) Added salt (KCI or ( N H , ), SO,) increased the rate of oxidation marginally On the basis of observed linearity of Amis plot and marginal positive salt effect, protonated CCA (en01 form of CCA, a cation) and H,O, [neutral molecule] were considered as reactive species in the rate limiting step Reaction rates were found to be enhanced significantly in anionic and nonionic micellar isodium dodecylsulfate (SDSI and Triton X-100 (Tx]

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Some Relationships Among the Stabilities of Metal Complexes.

Cited by 190 publications

References 0 publications

Humic Ion-Binding Model VII: a revised parameterisation of cation-binding by humic substances

Humic Ion-Binding Model VII: a revised parameterisation of cation-binding by humic substances

The substituent effect in transition metal complexes of 1, 10-phenanthroline

Kinetics and mechanism of hydrogen peroxide oxidation of chromone-3-carboxaldehydes in aqueous acid and micellar media

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