Sponsored by the Hazardous Waste Committee of the Environmental Council of the Environmental and Water Resources Institute of ASCE Chelating Agents for Land Decontamination Technologies examines the application of chelating agents for the treatment of soil contaminated with metals. Contaminated land remediation is a widespread and costly problem, and the traditional excavation-and-disposal treatment method is not a sustainable solution. Chelating agents (organic compounds that can bind metal ions) are an attractive new technology for land decontamination, because chelating agents enhance metal extraction from contaminated soil or sediment and facilitate metal mobility in subsurface soils. Chapters in this book cover the process fundamentals as well as engineering applications and recent advances for the use of chelating agents in soil washing, soil flushing, phytoremediation, and electrokinetic remediation. They address the application of chelating agents for both ex situ and in situ soil remediation technologies. The extensive use of illustrations and summary tables is combined with up-to-date references. This compilation of engineering applications and research findings for different chelating agent

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PDF Pages	PDF Title
1	Cover
4	Contents
8	Preface
10	Contributing Authors
12	Chapter 1 Design, Implementation, and Economic/Societal Considerations of Chelant-Enhanced Soil Washing 1.1 Introduction
15	1.2 Soil Washing Technology
22	1.3 Chelant-Enhanced Soil Washing
29	1.4 Economic and Societal Considerations
31	1.5 Conclusions
32	1.6 References
38	Chapter 2 Remediation of Metal-Contaminated Sediments by Means of Chelant-Assisted Washing 2.1 Background on Contaminated Sediments
41	2.2 Management and Treatment of Contaminated Sediments
45	2.3 Sediment Washing Using Chelating Agents
50	2.4 Recovery of Chelating Agents from Waste Washing Solutions
52	2.5 Experimental Results of Chelant-Assisted Washing for Metal Removal from Sediments
65	2.6 Conclusions 2.7 References
70	Chapter 3 Operational Conditions of Chelant-Enhanced Soil Washing for Remediation of Metal-Contaminated Soil 3.1 Principle of Soil Washing 3.2 General Procedure and Application of Soil Washing
72	3.3 Chelant-Enhanced Soil Washing
73	3.4 Factors Influencing Chelant-Enhanced Soil Washing
81	3.5 Risk Assessment and Control of Chelant-Enhanced Soil Washing
87	3.6 A Case Study of EDTA-Enhanced Soil Washing for Remediation of a Demolished Electroplating Site
95	3.7 Conclusions 3.8 Acknowledgments 3.9 References
103	Chapter 4 Electrochemical Treatment and Recovery of Chelating Agents 4.1 Remediation of Metal Contaminated Soils
105	4.2 Chemical Treatments of Waste EDTA Soil Washing Solution
107	4.3 Electrochemical Oxidation
110	4.4 Electro-coagulation
111	4.5 Electrochemical EDTA Recycling
115	4.6 Conclusions
116	4.7 References
120	Chapter 5 Extraction of Metals from Spent Catalyst Using Fresh and Recovered Chelating Agents 5.1 Introduction
122	5.2 Methods to Extract Metals from Spent Catalyst
127	5.3 Advantages of Chelating Agents
128	5.4 Mechanism of Complex Formation of Metal-Chelating Agent
130	5.5 Extraction of Metals from Spent Catalyst with Fresh Chelating Agents
131	5.6 Recycle or Regeneration Methods of Chelating Agents
135	5.7 Characterization of Recycled EDTA
141	5.8 Reusability of Spent Catalyst after Metal Extraction
142	5.9 Extraction Kinetic Models for Chelating Agents
145	5.10 Conclusions
146	5.11 References
152	Chapter 6 Enhanced Soil Flushing and Washing of Contaminated Soil and Sediments 6.1 Introduction
154	6.2 Soil Flushing
156	6.3 Soil Washing
158	6.4 Use of Acids and Chelating Agents
160	6.5 Surfactant Washing and Flushing
175	6.6 Conclusions
176	6.7 References
182	Chapter 7 Heavy Metal Leaching from Contaminated Soils during the Percolation of EDTA: Observations and Modeling 7.1 Introduction and Outline
187	7.2 Observations: Solubilization of Heavy Metals from a Soil Contaminated by Long-Term Spreading of Sewage Sludge/Wastewater—Reactivity and Kinetics
193	7.3 Observations and Modeling: Solubilization of Heavy Metals from a Soil Polluted by Long-Term Smelting Activities—A Finite Difference Model, including a Kinetic Leaching Term
203	7.4 Potential for Actual Use of Complexing Agents for Soil Decontamination
204	7.5 Conclusions 7.6 Acknowledgments 7.7 References
209	Chapter 8 Roles of Metal-(Hydr)oxides in Chelant-Enhanced (Phyto)extraction 8.1 Introduction 8.2 Interactions of Soil (Hydr)oxides with Chelating Agents
220	8.3 Conclusions 8.4 Acknowledgments 8.5 References
223	Chapter 9 Use of Chelating Agents in Electrochemical Remediation of Contaminated Soil 9.1 Introduction
225	9.2 Electrokinetic Remediation of Contaminated Soils
231	9.3 Enhancement Agents in Electrochemical Remediation
239	9.4 Use of Chelating Agents in Electrochemical Remediation
262	9.5 Selection of Chelating Agents in Electrochemical Remediation
264	9.6 Effects of Electrochemical Reactions during Electrochemical Remediation on Performance of Chelating Agents
267	9.7 Limitations of the Use of Chelating Agents in Enhancing Electrochemical Remediation
268	9.8 Future Research Directions
272	9.9 Summary
273	9.10 Acknowledgments 9.11 References
290	9.12 Acronyms
292	Editor Biographies
294	Index A C E
295	H K O P R S W

Published By	Publication Date	Number of Pages
ASCE	2012	295


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Standard Title	Chelating Agents for Land Decontamination Technologies
Published Code	ASCE
Publication Date	2012
Pages Count	295

ASCE 9780784476833 2012

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