ABSTRACT
The study for the analysis of heavy metals in air in Nsukka Local Government Area, Enugu State was carried out using Atomic Absorption Spectrophotometer. The result of the analysis were as follows: Mercury 0.03235±0.0062, Arsenic 0.0037±0.030, Cadmium 0.004±0, Chromium 0.036±0.00141, Lead 0.0115±0.00071. Comparing the result with WHO standard, it reveals that Arsenic, Chromium were above and Cadmium, Lead, Mercury were below the permissible limit. Hence, activities leading to pollution of the environment should be limited in the environment.
TABLE OF CONTENT
CONTENTS PAGE
Title Page – – – – – – – – i
Certification – – – – – – – ii
Dedication – – – – – – – – iii
Acknowledgements – – – – – – iv
Abstract – – – – – – – – vi
Table of Contents – – – – – – –
CHAPTER ONE
- INTRODUCTION – – – – – 1
- Background of the Study – – – – – 1
- Aim and Objectives – – – – – 4
- Scope and Limitation – – – – – 5
- Definition of terms – – – – – – 5
CHAPTER TWO
- LITERATURE REVIEW – – – – 7
- Air Pollution – – – – – – 7
- Sources of Air Pollution – – – – – 9
- Natural Sources – – – – – – 9
- Anthropogenic Sources (Human – Made) – – 11
- Heavy Metals – – – – – – 12
- Arsenic – – – – – – – 14
- Cadmium – – – – – – – 15
- Chromium – – – – – – – 17
- Lead – – – – – – – – 19
- Mercury – – – – – – – 21
- Mechanism of Toxicity of Heavy Metals – – 22
- Mechanisms of Toxicity of Arsenic – – – 22
- Mechanisms of Toxicity of Cadmium – – – 24
- Mechanisms of Toxicity of Chromium – – – 27
- Mechanisms of Toxicity of Lead – – – 29
- Mechanisms of Toxicity of Mercury – – – 32
CHAPTER THREE
- MATERIALS AND METHOD – – – 34
- Materials – – – – – – – 34
- Method – – – – – – – 35
- Sample Collection/Preparation – – – – 35
- Digestion of the Sample – – – – – 35
CHAPTER FOUR
- RESULTS AND DISCUSSION – – – 37
- Results – – – – – – – 37
- Discussion – – – – – – – 38
CHAPTER FIVE
- SUMMARY, CONCLUSION AND
RECOMMENDATIONS – – – – 38
- Summary and Conclusion – – – – 41
- Recommendations – – – – – – 42
References