the traditional measurement methods of 3 kinds of aluminum species and the total aluminum content in polyaluminum solutions are al-ferron timed complex spectrophotometry and edta chelatometry respectively. but eachof these methods has different deficiencies. in this paper, microwave digesting technical had be coupled with the radiate ferron spectrophotometry to rapid mensurate the concentration...

A new concept of critical point is expounded by analysing the potentiometric titration curves of aluminium salt solutions under the moderate slow rate of base injection. The critical point is defined as the characteristic spot of the Al salt solutions potentiometric titration curve, which is related to the experiment conditions. In addition, the changes of critical points reflect the influence ...

Aluminum is a major rock-forming element, but its low solubility in H2O at upper crustal conditions has led to the assumption that it is effectively immobile during fluid–rock interaction in the deep crust and upper mantle. However, new experimental results on Al solubility in H2O–SiO2–NaCl fluids at high pressure and temperature challenge this view. The combined effects of temperature, pressur...

The traditional measurement methods of 3 kinds of aluminum species and the total aluminum content in polyaluminum solutions are Al-Ferron timed complex spectrophotometry and EDTA chelatometry respectively. But eachof these methods has different deficiencies. In this paper, microwave digesting technical had be coupled with the radiate Ferron spectrophotometry to rapid mensurate the concentration...

The influence of pH and aging upon the phosphate binding capacity of iron(II1) or aluminum hydroxides has been investigated. The formation of reactive polynuclear hydroxo complexes by the hydrolyzing cations and the subsequent oxolation process are starting points of a discussion of the observed influence of the experimental conditions upon the rate and extent of phosphate adsorption. The ratio...

Dissolved aluminum (III) in acidic soils or culture media is often rhizotoxic (inhibitory to root elongation). Alkaline solutions of Al are also sometimes rhizotoxic, and for that reason toxicity has been attributed to the aluminate ion, Al(OH)(4) (-). In the present study, seedlings of wheat (Triticum aestivum L. cv Tyler) and red clover (Trifolium pratense L. cv Kenland) were cultured in aera...

Hydrolysis and precipitation are the key processes that determine coagulation performance of inorganic metal salts. The valence concentration salts, ligands, solution pH all influence performance. In order to get a full picture on pros cons various salts as coagulants, this paper conducted thermodynamic equilibrium calculations experiments analyze verify hydrolysis-precipitation a...

Three-dimensional bulk alumina and its two-dimensional thin films show great structural diversity, posing considerable challenges to their experimental structural characterization and computational modeling. Recently, structural diversity has also been demonstrated for zero-dimensional gas phase aluminum oxide clusters. 4] Mass-selected clusters not only make systematic studies of the structura...