Charanjeet Kaur Mangat has completed her PhD from Guru Nanak Dev University. She is the HOD of School of Applied & Basic Sciences, RIMT University. She has published 7 papers in reputed journals.

Reactive dyes are hazardous due to their property of forming covalent bond with –NH2 and –SH group of proteins in living organisms. Hence their removal is mandatory from the effluent before discharging into main stream. Different methods have been employed for the satisfactory removal of dyes. Current methods for their removal largely rely on adsorption techniques which are costly and produce another waste to be disposed off, whereas the concept of reverse micelles acting to encapsulate the dye in aqueous micro pool in solvent environment provides a useful chemistry. The removal of the reactive red RB from aqueous phase in amyl alcohol solvent using cationic surfactant 1,1\'-(1,1\'-(ethane-1,2-diylbis-(sulfanediyl))bis(octadecane-2,1-diyl))dipyridinium bromide (CMC=0.02mM and Molecular weight=915.15) was successful giving 100% removal. The effect of dye and surfactant concentration, solvent, temperature, salts like NaCl, KCl, NH4Cl and MgCl2 were studied. The percentage removal of dye depends upon the size of the reverse micelle of the surfactant. The solvent used for the dye removal can be recovered by distillation method and can be reused.

V S Rimkevich has completed his PhD from Moscow State University and received the rank of Professor from Russian Academy of Natural History. He is Head of the Laboratory of Scientific Technologies of Mineral Raw Ores Processing of Institute of Geology and Nature Management FEB RAS. He is an author of more than 60 papers in reputed journals and has 14 patents.

Silicates and aluminosilicates, including kaolin concentrates, are inexhaustible source of alumina, silica, aluminum and silicon. Experiments were carried out on samples of kaolin concentrates produced at enrichment of raw quartz-feldspar-kaolin from the Chalgany deposit (Amur region). Leaching of kaolin concentrates was carried out in aqueous solutions of ammonium bifluoride and fluoride to produce ammonium hexafluorosilicate and hexafluoroaluminate. In the following steps, separated from the reaction mixture ammonium hexafluorosilicate and hexafluoroaluminate were dissolved and hydrolyzed in aqueous solutions under the influence of ammonium hydroxide to form nanometer-sized amorphous silica and aluminum hydroxide. Conditioned metallurgical alumina is extracted from aluminum hydroxide using calcination. The reaction of ammonia fluoride and ammonia water regeneration, those are entered on the stage closed technological processes after reduction was studied. Impurity compounds are separated on the different stages of hydrochemical processing. Thermodynamic parameters, rate constants and activation energy of hydrochemical reaction of processing of kaolin concentrates are determined. Low-waste material flow diagram is composed and the expenditure coefficients for every chemical compounds participating in technological processes are installed. These investigations are resulted in hydrochemical method of processing of kaolin concentrates with complex extraction of various useful components. The developed method could be applicated for complex processing of kyanite and nepheline concentrates and industrial wastes-ash from coal burning of thermal electro-centrals.