Colloids coagulation

The described enhancement of carbamazepine photodegradation by Fe(III) oxide colloids could take place in deltas and estuaries, and our laboratory data suggest that the photochemical consequences of the chloride build-up could more than compensate the decrease of iron, due to colloid coagulation and sedimentation, which is usually observed in these environments. Interestingly, carbamazepine photodegradation on interaction between Fe(III) oxide colloids and chloride was more important than DOM-sensitized photolysis or direct photolysis, which are usually major photodegradation pathways for organic pollutants in surface waters [93]. 

There are good reasons for these disagreements, as it will be noted in what follows. According to the traditional Derjaguin-Landau Verwey Overbeek (DLVO) theory [13], most colloids coagulate when the electrolyte concentration... 

We know that manganese nodules near the continent have a lower manganese and higher iron content than deep-sea manganese nodules. Iron hydroxide colloids coagulate, as already described, earlier than those of man nese hydroxides. Therefore the first precipitation from the river impact near the continental border should Iw enriched in iron, and the precipitates more distant from the continental border should have lower iron and higher manganese contents. 

PARTICLE-PARTICLE INTERACTION COLLOIDS, COAGULATION, AND FILTRATION... 

Collector of other particles (aggregation of colloids, coagulation)... 

Particle-Particle Interaction Colloids, Coagulation, and Filtration... 

Molecular Recombination Colloid Coagulation Aerosol Agglomeration... 

Aggregate Flotation. The investigations of the flotation process considered the same colloid-coagulant system as did the sedimentation studies (see List I). Likewise, the geometry of the reactors employed for (electro)flotation was kept as similar as possible to the geometry of the sedimentation tanks. And the evaluation of separation efficiency proceeded along the same steps of calculation as in the case of sedimentation. 

Fig. 6.14. Interaction energy versus distance, (a) Surfaces repel strongly small colloidal particles remain stable, (b) Surfaces come into stable equilibrium at secondary minimum if it is deep enough colloids remain stable, (c) Surfaces come into secondary minimum colloids coagulate slowly, (d) Surfaces may remain in secondary minimum coUoids coagulate rapidly, (e) Surfaces and colloids coalesce rapidly. (After Isradachvili [26].)...

TSS, colloids Coagulation-flocculation process assistance, pulp and paper and agrofood effluents Deconvolution [10-13]... 

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