I= ION EXCHANGE AND ADSORPTION BEHAVIOUR OF NATURAL CLAYS AND HYDRATED METAL OXIDES
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Title of Thesis
ION EXCHANGE AND ADSORPTION BEHAVIOUR OF NATURAL CLAYS AND HYDRATED METAL OXIDES

Author(s)
Saad Alik Khan
Institute/University/Department Details
University of the Punjab, Lahore
Session
1992
Subject
Chemistry
Number of Pages
310
Keywords (Extracted from title, table of contents and abstract of thesis)
NATURAL CLAYS, HYDRATED METAL OXIDES, waste water, cesium, Strontium, cobalt, alumina, Nuclear waste management, Adsorption, Bentonite deposits, bentonite clay

Abstract
As a part of the program to evaluate the feasibility of local soil and clays for the disposal of waste water effluents containing low concentrations of radioactive nuclides and heavy metal pollutants, the sorption of cesium (I), Strontium(II). Cobalt(II), Chromium(III), chromium(VI) and silver(I) on bentonite from Shina Bagh, Kala Chita forest, Attock, has been studied under varying experimental conditions.

The sorption of cesium(I), Strontium(II) and cobalt(II) on alumina under optimum conditions for their sorption on bentonite has also been studied

The sorption experiments were performed by batch technique using radioactive nuclides of the elements as tracers, Distribution coefficients, Kd, and percent adsorption, P, were determined radiometrically as a function of all pertinent variables, i.e. shaking time, pH, adsorbent and adsorbate concentrations. The natural pH, i.e. 7.3 obtained by mixing the metal solution with bentonite in 20:1 ratio was used for the portion studies of Cs+,Sr+, and Co2+, where as the sorption f Ag+, Cr3+ and chromate ions was studies at pH. The optimum conditions for the sorption of these metal ions on bentonite and alumina have been established and reported

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2085.34 KB
S. No. Chapter Title of the Chapters Page Size (KB)
1 0 Contents
111.73 KB
2 1 Introduction 1
73.45 KB
  1.1 Industrial Development And Environmental Pollution In Pakistan 1
  1.2 Nuclear Waste Management 5
3 2 Theory And Literature Review 11
334.11 KB
  2.1 Adsorption
  2.2 Adsorption Principles 13
  2.3 Adsorption Parameters 17
  2.4 Adsorption Equilibrium 20
  2.5 Adsorption Isotherms 20
  2.6 Classification Of Isotherms 20
  2.7 Theories Of Adsorption 22
  2.8 Natural Clay Minerals 38
  2.9 Types Of Natural Clays 40
  2.10 Bentonite Deposits In Pakistan 48
  2.11 Hard-Soft Acid-Base Theory 49
  2.12 Ion-Exchange Selectivity And Softness 50
4 3 Procurement And Characterization Of Bentonite Clay 60
317.41 KB
  3.1 Procurement Of Bentonite Clay 60
  3.2 Preliminary Processing Of Clay Samples 60
  3.3 X-Ray Diffraction Analysis 61
  3.4 Characterization Of Bentonite From Shina Bagh 61
  3.5 Results And Discussion 72
5 4 Sorption Of Cesium On Bentonite 94
214.19 KB
  4.1 Introduction 94
  4.2 Experimental 96
  4.3 Results And Discussion 101
6 5 Sorption Of Strontium On Bentonite 132
207.24 KB
  5.1 Introduction 132
  5.2 Experimental 134
  5.3 Results And Discussion 136
7 6 Sorption Of Cobalt On Bentonite 166
202.84 KB
  6.1 Introduction 166
  6.2 Experimental 168
  6.3 Results And Discussion 169
8 7 Adsorption Of Cs(I), Sr(Ii) On Alumina 100
206.09 KB
  7.1 Introduction 200
  7.2 Experimental 202
  7.3 Results And Discussion 203
9 8 Adsorption Of Chromium(Iii), Chromium(Vi) And Silver(I) On Bentonite 235
374.03 KB
  8.1 Introduction 235
  8.2 Experimental 237
  8.3 Results And Discussion 240
  8.4 Summary 272
  8.5 References 278