Description
Book SynopsisWater pollution is topic of immense and common concern throughout the world. This book presents the results and data from research and adsorption experiments carried out on the removal of nickel and chromium (as well as other metals) from aqueous solutions using modified silica sand. .
Table of ContentsPreface ix
1. Introduction 1
1.1 Environment 1
1.2 World Water Distribution 2
1.3 Environmental Pollution 5
1.4 Chromium 11
1.5 Nickel 16
1.6 Objectives 20
1.7 Literature Review 20
1.8 Adsorption 31
1.9 Adsorption Forces 35
1.10 Adsorption Theories 36
2. Material and Methods 39
2.1 Adsorbent Collection and Storage 39
2.2 Adsorbent Modification 39
2.3 Preparation of Adsorbate Cr (VI) and Ni (II) Solution 40
2.4 Instrumentation 40
2.5 Batch Adsorption Experiment 41
3. Results and Discussions 45
3.1 Characterization of Silica Sand 45
3.2 Effect of Contact Time and Initial Concentration of Cr (VI) and Ni (II) 52
3.3 Effect of pH on the Removal of Cr (VI) and Ni (II) 56
3.4 Effect of Temperature on the Removal of Cr (VI) and Ni (II) 60
3.5 Effect of Adsorbent Dosage on the Removal of Cr (VI) and Ni (II) 66
3.6 Adsorption Isotherm 73
3.7 Adsorption Kinetics 79
3.8 Thermodynamic Studies 86
4. Conclusions 91
References 94
