الفهرس | Only 14 pages are availabe for public view |
Abstract This thesis consists of three chapters, chapter I is the introduction, chapter II represents the experimental techniques, and chapter III contains the experimental results and their discussion. Chapter I : introduction The introduction consists of the following topics: * General definition of pollution and its effect on the environment * The types of pollution ( Water pollution, pollution with metals) * Chromium metal (occurrence, sources) * Hexavalent chromium ion (its uses in industry , its toxic effect on the human body) * How hexavalent chromium enters the body * How hexavalent chromium affects the body * The toxicity of hexavalent chromium ion on saline and fresh water |