Interaction between calcium and phosphate adsorption on goethite

Article Abstract:

The adsorption and precipitation of phosphate and calcium in relation to goethite is measured using the charge distribution of the surface complexes of the chemicals, and taking pH levels into account. Graphs show the interactions between phosphate and calcium in goethite systems.

Netherlands, Science & research, Calcium, Statistical Data Included, Brief Article

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Photochemical degradation of 4-chlorocatechol at TiO2 electrodes: comparison between sorption and photoreactivity

Article Abstract:

The degradation of the substrate 4-chlorocatechol occurs through the oxidation of the sorbed substrate. The rate of degradation 4-chlorocatechol appear to be dominated by the initial solution concentration of the substrate and pH. Results indicate that for a given pH value, 4-chlorocatechol degradation rate increases when its concentration in solution is increased. The rates at pH 3, 5, and 8 are more connected to the sorbed 4-chlorocatechol concentration s of 20, 50 and 200 micronM than to the aqueous phase concentration.

Industrial Organic Chemicals, Cyclic Crude and Intermediate Manufacturing, Silicon, Catechol, Biodegradation, Phenols (Class of compounds), Plant growing media

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Competitive interaction between phosphate and citrate on goethite

Article Abstract:

A ion adsoption model has been developed to describe the competitive interaction between phosphate and citrate on goethite. The presence of phosphate greatly reduced citrate adsorption over a wide pH range. Citrate affected phosphate adsorption at pH values below 7, with the largest interaction around pH 5. Competition for binding sites was the main reason for the competitive adsorption of phosphate and citrate.

All Other Basic Organic Chemical Manufacturing, Phosphatic Fertilizer Manufacturing, Industrial organic chemicals, not elsewhere classified, Phosphatic fertilizer industry, Citrates, Phosphate Materials NEC

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