Ionic adsorption on variable charge mineral surfaces. Theoretical charge development and titration curves

Soil Research ◽  
1977 ◽  
Vol 15 (2) ◽  
pp. 121
Author(s):  
JW Bowden ◽  
AM Posner ◽  
JP Quirk
Keyword(s):  
General Theory ◽  
Tropical Soils ◽  
Oxide Surfaces ◽  
Mineral Surfaces ◽  
Variable Charge ◽  
Titration Curves ◽  
Ionic Adsorption ◽  
Ph Dependent ◽  
Cation Adsorption

A completely general theory is presented which can be used to describe both anion and cation adsorption on amphoteric oxide surfaces. It takes account of the fact that both the surfaces and adsorbing species are charged and that the surfaces change their charge when ionic adsorption takes place. The theory is applicable to both specific and non-specifically adsorbed ions. It is shown to account for the pH dependent charge curves of goethite, silica and two tropical soils.

Corrigenda - Ionic adsorption on variable charge mineral surfaces. Theoretical charge development and titration curves

Soil Research ◽  
1977 ◽  
Vol 15 (2) ◽  
pp. 121 ◽  
Author(s):  
JW Bowden ◽  
AM Posner ◽  
JP Quirk
Keyword(s):  
General Theory ◽  
Tropical Soils ◽  
Oxide Surfaces ◽  
Mineral Surfaces ◽  
Variable Charge ◽  
Titration Curves ◽  
Ionic Adsorption ◽  
Ph Dependent ◽  
Cation Adsorption

A completely general theory is presented which can be used to describe both anion and cation adsorption on amphoteric oxide surfaces. It takes account of the fact that both the surfaces and adsorbing species are charged and that the surfaces change their charge when ionic adsorption takes place. The theory is applicable to both specific and non-specifically adsorbed ions. It is shown to account for the pH dependent charge curves of goethite, silica and two tropical soils.

Generalized Model for Anion and Cation Adsorption at Oxide Surfaces

1973 ◽  
Vol 245 (145) ◽  
pp. 81-83 ◽  
Author(s):  
J. W. BOWDEN ◽  
M. D. A. BOLLAND ◽  
A. M. POSNER ◽  
J. P. QUIRK
Keyword(s):  
Oxide Surfaces ◽  
Generalized Model ◽  
Cation Adsorption

Nitrate Mobility in Variable-Charge Tropical Soils

2020 ◽  
Vol 51 (16) ◽  
pp. 2163-2173
Author(s):  
Ronaldo Batista Pinheiro ◽  
Reinaldo Bertola Cantarutti ◽  
Ecila Mercês de Albuquerque Villani ◽  
Valéria Santos Cavalcante ◽  
Maurício Paulo Ferreira Fontes
Keyword(s):  
Tropical Soils ◽  
Variable Charge

The Mineralogy, Chemistry, and Physics of Tropical Soils With Variable Charge Clays

Eos ◽  
1983 ◽  
Vol 64 (10) ◽  
pp. 99
Author(s):  
D. K. Cassel ◽  
D. R. Nielsen
Keyword(s):  
Tropical Soils ◽  
Variable Charge

pH-Dependent Adsorption and Conformational Change of Ferritin Studied on Metal Oxide Surfaces by a Combination of QCM-D and AFM

2008 ◽  
Vol 112 (11) ◽  
pp. 4180-4186 ◽  
Author(s):  
Anne Gry Hemmersam ◽  
Kristian Rechendorff ◽  
Flemming Besenbacher ◽  
Bengt Kasemo ◽  
Duncan S. Sutherland
Keyword(s):  
Metal Oxide ◽  
Conformational Change ◽  
Oxide Surfaces ◽  
Metal Oxide Surfaces ◽  
Ph Dependent

Sorption of glyphosate and phosphate by variable-charge tropical soils from Tanzania

Geoderma ◽  
2007 ◽  
Vol 138 (1-2) ◽  
pp. 127-132 ◽  
Author(s):  
A.L. Gimsing ◽  
C. Szilas ◽  
O.K. Borggaard
Keyword(s):  
Tropical Soils ◽  
Variable Charge

scholarly journals Charge Characteristics and Cation Exchanges Properties of Hilly Dryland Soils Aceh Besar, Indonesia

2020 ◽  
Vol 9 (2) ◽  
pp. 90-101
Author(s):  
Sufardi Sufardi ◽  
Teti Arabia ◽  
Khairullah Khairullah ◽  
Karnilawati Karnilawati ◽  
Sahbudin Sahbudin ◽  
...  
Keyword(s):  
Cation Exchange ◽  
Surface Charge ◽  
Organic Amendments ◽  
Chemical Properties ◽  
Soil Surface ◽  
Tropical Soils ◽  
Exchange Capacity ◽  
Surface Charges ◽  
Variable Charge ◽  
Negative Surface

Soil surface charge and cation exchange are important parameters of soil fertility in tropical soils. This study was conducted to investigate characteristics of surface charges and cation exchanges on four soil orders of the dryland in  Aceh Besar district. The soil order includes Entisols Jantho (05o16’58.41” N; 95o37’51.82” E), Andisols Saree (05o27'15.6" N; 95o44'09,1" E), Inceptisols Cucum (05º18’18,37” N; 95º32’48,04” E), dan Oxisols Lembah Seulawah (05o27’19,4” N; 95o46’19,2” E). The charge characteristics of surface charge are evaluated from the parameter of DpH (pHH2O-pHKCl), variable charge (Vc), permanent charge (Pc), and point of zero charges (PZC). In contrast, cation exchange properties are evaluated from several soil chemical properties, such as soil organic matter (SOM), base saturation (BS), cation exchange capacity (CEC), and effective CEC (ECEC). The results show that the four pedons of soil in the hilly dryland of Aceh Besar include a variable charge because it has a PZC, which is characterized by a negative surface charge with a PZC of pHH2O and has CEC dependent soil pH. PZC value varies from 3.21 – 5.26 and sequentially PZC Andisols Oxisols Entisols Inceptisols. The total CEC value differs considerably from ECEC and the sum of cations. CEC total of the soils varies from 12.8 – 34.4 cmol kg-1, whereas the ECEC values vary from 2.72 – 8.66 cmol kg-1. The highest variable charge percentage is found in Andisols Saree. In contrast, the highest permanent charge is found in Inceptisols Cucum and is positively correlated with pHH20, PZC, CEC, and sums of cations or ECEC. Improving soil quality in hilly dryland soils in Aceh Besar District can be done by decreasing the PZC status of soils with organic amendments and fertilizers or increasing the pH by using liming.

Cadmium sorption and extractability in tropical soils with variable charge

2018 ◽  
Vol 190 (6) ◽  
Author(s):  
Marina Colzato ◽  
Luís Reynaldo Ferracciú Alleoni ◽  
Marcos Yassuo Kamogawa
Keyword(s):  
Tropical Soils ◽  
Variable Charge
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