Kinetics of phosphate sorption to polygalacturonate-coated goethite

• Published in: Soil Science Society of America journal Vol. 70; no. 2; pp. 541 - 549
• Main Authors: Mikutta, C, Lang, F, Kaupenjohann, M
• Format: Journal Article
• Language: English
• Published: Madison Soil Science Society 01.03.2006; Soil Science Society of America; American Society of Agronomy
• Subjects: Agronomy. Soil science and plant productions; Biological and medical sciences; Carbon dioxide; Chemical, physicochemical, biochemical and biological properties; Coatings; desorption; diffusion; Earth sciences; Earth, ocean, space; electrophoresis; Exact sciences and technology; Fundamental and applied biological sciences. Psychology; galacturonic acid; Geochemistry; goethite; immobilization in soil; Kinetics; mathematical models; Mineral components. Ionic and exchange properties; Mineralogy; Minerals; Non silicates; Organic matter; Phosphates; Physics, chemistry, biochemistry and biology of agricultural and forest soils; polygalacturonates; Rhizosphere; Soil adsorption; Soil and rock geochemistry; Soil science; Soil sciences; Soils; Sorption; Zeta potential; oxides; Uronide polymer; Inorganic element; sorption; goethite; inorganic materials; Non silicate mineral; Soil science; porous materials; Chemical diffusion; Adsorbent; Soil chemistry; sugars; geochemistry; Polyanion; Oside; Earth science; Chemical reaction kinetics; Coated material; hydroxides; Organic anion; Inorganic anion; physicochemical properties; Pore; phosphates; Carboxylate; organic materials; Phosphorus compound; Iron III Hydroxides oxides; Polysaccharide

Biogenetic polysugars may affect the sorption characteristics of soil mineral particles in the rhizosphere. We hypothesized that polygalacturonate [PGA, (C6H7O6)n(-)] coatings on goethite reduce the diffusion of phosphate into the pores of the adsorbent. Goethite was preloaded with PGA (0-10 mg C g(...