TABLE OF CONTENTS
pages
Title Page – – – – – – – – – i
Certification – – – – – – – – ii
Dedication – – – – – – – – – iii
Acknowledgement – – – – – – – iv
Abstract – – – – – – – – – v
Table of Content – – – – – – – – vi
CHAPTER ONE
1.0 Introduction – – – – – – – 1
1.1 Background of the study – – – – – 1-3
1.2 Aim and Objectives – – – – – – 3
1.3 Scope and Limitation of the study – – – – 3-4
1.4 Definition of Related Terms – – – – – 4-5
CHAPTER TWO
2.0 Literature Review – – – – – – 6
2.1 Sediment – – – – – – – 6
2.2 Environment Issues of Sediment – – – – 7-8
2.3 Mangrove system and Heavy metal – – – 8-9
2.4   Arsenic and lead        –      –      –      –      –      –      –      9-10
2.4.1 Mercury and Calcium –      –      –      –      –      –      11
2.4.2 Iron and Aluminum    –      –      –      –      –      –      12
CHAPTER THREE
3.0 Materials and Methods – – – – – 13
3.1 Materials – – – – – – – 13
3.2 methods – – – – – – – – 13
3.2.1 Sample Collection and preparation – – – 14
3.2.2 Data collection and analyses – – – – – 14-15
3.2.3 Method of Sample collection – – – – – 15-16
3.2.4 Samples Presentation – – – – – – 16-17
CHAPTER FOUR
4.0 Results and Discussion – – – – – – 18
4.1 Results – – – – – – – – 18-20
4.2 Discussion – – – – – — – – 20-23
CHAPTER FIVE
5.0 Summary and Conclusion, Recommendation Reference – 24
5.1 Summary and Conclusion – – – – – 24
5.2 Recommendation – – – – – — – 25
References
CHAPTER ONE
INTRODUCTION
1.1 Background of the study Heavy metal production is known as to be the cause of various diseases globally, such s the minamata disease (Organic mercury poisoning ) utai-Itai disease (Cadmium poisoning), arsenous acid poisoning, and air pollution-released asthma (matsuo, 2003). Marine ecosystems are highly complex, dynamic and subject to many internal and external relationships that are subject to change over time. The pollutants that enter the inshore waters and estuaries create serious problems causing intensive damage to the life and activities of the living aquatic organisms and even to mass mortality. Among the pollutants, accumulation of heavy metals in marine ecosystem is of global importance. Significant contributions have been made with references to oceanic and coastal distribution of various heavy metals. The natural aquatic systems may extensively be contaminated with heavy metals released from demostic, industrial and other marine made activities (Velez and montoto, 1998; Conacher etal; 1993).
