000			03044 a2200181 4500
999			_c46973 _d46973
020			_a9788179933831
082			_a333.91 _bDE
100			_aDe, Sirshendu _961727
245			_aArsenic removal from contaminated groundwater
260			_aNew Delhi _bTERI Press _c2012
300			_axiii,288p.
505			_aCONTENTS Foreword v Preface vii Acknowledgements \ ix 1.Arsenic in Groundwater and its Health Effects 1 Introduction 1 Health Hazards of Arsenic 2 Social Impact of Arsenicosis 4 Summary 5 References 5 2.Hydrogeochemistry of Arsenic-contaminated Water 9 Introduction 9 Arsenic Chemistry 10 Sources of Arsenic and Environmental Impacts 12 Physico-chemical Processes Involved in Arsenic Mobilization 14 World Scenario of Arsenic Pollution in Water 16 Groundwater Hydrochemistry 25 Scenario of Arsenic in Deep Groundwater (>150m) and its Hydrogeochemistry 60 Summary 66 References 67 Bibliography 86 3. Arsenic Removal Processes and Advantages of the Adsorption Process 89 Introduction 89 Oxidation 91 Chemical Coagulation-Precipitation and Electrocoagulation 91 Ion Exchange 92 Membrane Technology 92 Adsorption 93 Literature Review on Various Adsorbents used for Arsenic Removal Studies 94 Prospect of Raw Laterite as an Arsenic Adsorbent 100 Treated/Modified Laterite as a Potential Arsenic Adsorbent 102 Organization of Experimental Work for Arsenic-Laterite System 104 Summary 106 References 106 Bibliography 115 4.Application of Raw Laterite as an Arsenic Adsorbent 117 Introduction 117 Experiment 119 Results and Discussion 126 Summary 126 186 5.Application of Acid-treated Laterite as an Arsenic Adsorbent 193 Introduction 193 Experiment and Methodology 194 Results and Discussion 197 Summary 216 References 217 Bibliography 219 6. Application of Acid-Base Treated Laterite as an Arsenic Adsorbent 221 Introduction 221 Materials and Analysis 222 Preparation of Acid-Base Treated Laterite and the Optimization of Treatment Process 224 Characterization of Treated Laterite 227 Chemical Reactions Involved during the Preparation of Treated Laterite 238 Batch Mode Arsenic Adsorption on Treated Laterite 240 Batch Kinetic Modelling of the Treated Laterite/Arsenic System 251 Adsorption of Arsenic Species in a Binary System 252 Effect of other Ions on As(III) and As(V) Adsorption F 255 Fixed-bed Column Study 256 Comparison of Adsorption Capacity of Treated Laterite with other Adsorbents 264 Scale up for Preparation of Treated Laterite and Performance of Household Filter using Contaminated Groundwater 269 Leaching Study of Fresh Treated Laterite and Arsenic Adsorbed Treated Laterite 272 Summary 274 References 275 Bibliography 279 7. Conclusions and Future Work 281 Index 285 About the Authors 289
600			_940054
700			_aMaiti, Abhijit _961728
890			_aIndia
891			_aFT
942			_2ddc