الفهرس 
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Abstract
The work presented in this dissertation started by displaying the main aim of the subject, which describes the chemical treatment of some organic and inorganic wastes resulted from plants of power stations and consider very serious pollutants. The thesis comprises three chapters, the first represents a literature survey of the collectors complexes under study and the recommended methods used for the separation and determination of the analytes with special focusing on flotationatomic absorption and spectrophotometric procedures. The second chapter deals with experimental techniques and the procedures used for the separation by flotation and spectrophotometric and atomic absorption determination. Also contains the reagents, stock solutions and instruments used in the investigation. The third chapter is concerned with the results and discussion. It is divided into four sections: the first dealing with separationflotation of V(IV) and the selective separation of V(IV) from V(V) in which V(IV) can be floated with oleic acid where V(V) still in the mother liquor. The determination of V(IV) was carried out in waste samples resulted from power stations. The procedure depends on using 1x104 molL1 1(2hydroxy4methoxy) benzophenone)4phenylthiosemicarbazone for complexation of 2x105 molL1 V(IV) by using flotation technique and 3x103 molL1 oleic acid [HOL] surfactant. Several factors affecting the flotation process have been studied as hydrogen ion, complexing agent, analyte concentration, surfactant concentration, temperature and volume. The maximum separation of V(IV) (100%) is achieved at pH range 12. Interferences of various foreign ions can be overcame using excess HMBPT and 0.1 molL1 Na2S2O3 at the recommend conditions. The second section deals with the separation flotation and microdetermination of Fe(III) using aluminon as a collector. A sensitive, selective flotation separation of Fe(III) from Fe(II) and the maximum separation of Fe(III) (100%) is achieved at pH range 12 for 2x105 molL1 Fe(III) using 2x103 molL1 oleic acid and 2x104 molL1 aluminon. The scum layer can be determined by using atomic absorption spectrometer. All interferences of foreign ions are avoided using excess aluminon and 0.5 ppm NaBH4. The third section deals with the separation of copper by using malonyl bis (thiosemicarbazide) as a collector. 5x105 molL1 Cu(II) can be completely separated at pH range 3.56.5 Excess Mal (5x104 molL1) is used to avoid interferences without any effect on the separation efficiency. The fourth section deals with the use of copper (5x105 molL1) as a good reagent for complexation with aniline (2x104 molL1) using 2x103 molL1 HOL at pH range 67. All interferences can be controlled obtaining. The work applied on natural water from different sources, synthetic mixtures, simulated and real samples which indicate that the procedure is simple, accurate and free from interferences.