학위논문 (석사)-- 서울대학교 대학원 : 건설환경공학부, 2017. 2. 박준범.In industrial complexes, gas stations and railbeds, soil and groundwater contamination have occurred frequently and at a high concentration. Especially, zinc, which is one of the most common contaminants in the industrial areas, is needed to be controlled properly. A concept of fill layer construction using adsorptive soil materials is introduced in this study to minimize spreading of contamination.
The purpose of this study is to evaluate shear strength characteristics and adsorption capacity of candidate materials for adsorptive fill materials. The candidate materials consist of weathered granite soil as a base material and natural zeolite for adsorptive materials. The composition methods were amendment and partial substitution. Amendment was the composition method that zeolite similar to particle size distribution of weathered granite soils was amended to weathered granite soils. Partial substitution was the method that fine parts of weathered granite soils were substituted with fine particles of natural zeolite. Shear stength characteristics and adsorption capacities of zeolite-amended soils and partially substituted materials through compaction test, direct shear test and sorption isotherm equilibrium test.
In case of amendment, test results showed that internal friction angle was decreased with increasing zeolite content while adsorption capacity was increased linearly. In case of partial substitution, shear strength parameters and adsorption capacities were higher than those of zeolite-amended soils. That is, partially substituted materials could be developed as adsorptive fill materials with maximizing adsorption capacity of materials and maintaining the shear strength of materials at weathered granite soils level.Chapter 1 Introduction 1
1.1 Background 1
1.2 Research Concept 4
1.3 Objective 5
Chapter 2 Literature Review 6
2.1 Previous Research 6
2.1.1 Zn Removal Efficiency of Zeolite 7
2.1.2 Zeolite-amended Materials 8
2.1.3 Researches on Development of Fill Materials 10
2.2 Data Analysis of Adsorption Isotherm Equilibrium Test 11
2.2.1 Langmuir Adsorption Isotherm Model 11
2.2.2 Freundlich Adsorption Isotherm Model 12
Chapter 3 Materials and Methods 14
3.1 Materials 14
3.2 Methods 15
3.2.1 Amendement 15
3.2.2 Adsorption Isotherm Equilibrium Tests in Different Particle Size of Zeolite Weathered Granite Soils 16
3.2.3 Partial Substitution 17
3.2.4 Tests of Evaluating Properties for Adsorptive Fill Materials 19
Chapter 4 Experimental Results and Discussion 20
4.1 Amendment 20
4.1.1 Compaction Test 20
4.1.2 Direct Shear Test 21
4.1.3 Adsorption Isotherm Equilibrium Test 23
4.1.4 Comparison with Different Zeolite Content 25
4.2 Adsorption Isotherm Equilibrium Tests in Different Particle Size of Zeolite Weathered Granite Soils 26
4.3 Partial Substitution 30
4.3.1 Compaction Test 30
4.3.2 Direct Shear Test 31
4.3.3 Adsorption Isotherm Equilibrium Test 33
Chapter 5 Conclusions 35
Bibliography 37Maste
