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UNIVERSITY OF MENTOURI (2009)

USE OF POLYMERS AND BIOPOLYMERS FOR WATTER RETENTION AND SOIL STABILIZATION AT ALGERIAN ARID AND SEMI-ARID SOILS

MAGHCHICHE ABDELHAK

Titre : USE OF POLYMERS AND BIOPOLYMERS FOR WATTER RETENTION AND SOIL STABILIZATION AT ALGERIAN ARID AND SEMI-ARID SOILS

Auteur : MAGHCHICHE ABDELHAK

Université de soutenance : UNIVERSITY OF MENTOURI CONSTANTINE

Grade : Doctor in Analytical and physics Chemistry 2009

Présentation
The general objective of this study was to produce a series of low costs polymers and biopolymers to alleviate some poor physical properties of sandy soils such as low water retention and inefficient water use, especially in arid and semiarid regions such as in Algeria Conditions. Polystyrene used as impermeable subsurface layer barrier for water movement during irrigation or rainfall avoid also deep percolation of water.

This thesis is organized as follows : Chapter I : introduces the most important general review of arid and semiarid regions with soil physical and chemical proprieties. In Chapter II : focuses general concepts of soil conditioners especially polymers, biopolymers and cellulose fiber. Chapter III : The concepts of a wide variety of analysis techniques used to characterize polymers synthesized such as Thermal Analysis, Infra-Red Spectroscopy, Viscosity, X-ray diffraction (XRD) and Scanning Electron Microscopy (SEM) are explained. Other techniques used to characterize metals and compounds of soils and fiber are presented Like atomic absorption and flame emission spectroscopy. In Chapter 4:In this experimental part before the preparation of polymer blend from Polyacrylamide and cellulose fibre we characterized soils , polymers and cellulose fibre from Alfa grass then the blend were sprayed at arid and semi arid soil surface , finally we do experiments the effectiveness of blend prepared to retain humidity and water at the soil Chapter 5 : discusses the study of synthesis, characterisation of polymer blend in soil Finally, the Thesis is summarized

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