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xii GENERAL INTRODUCTION 1 LITERATURE REVIEW 4 Lead sources and Species in Soil 4 Toxicity of Lead to Human Being 6 Heavy Metals Retention in Soil 8 Lead Solubility in Aqueous System 13 Remediation Technologies for Heavy Metal-Contaminated Soils 20 Lead Solubility with EDTA 22 PART 1. FACTORS AFFECTING LEAD EXTRACTION WITH EDTA FROM LEAD-CONTAMINATED SOILS 29 INTRODUCTION 30 Fate of Lead in Soil 32 EDTA Complexation with Metals in Soil 35 Lead Extraction with EDTA 38 MATERIALS AND METHODS 41 Sample Characterization and Preparation 41 Extraction Procedures 44 RESULTS AND DISCUSSIONS 46 |
