Characterization of Leaching from Waste Incineration Air-

0,61

MB

Pollution-Control Residues

60

stron

5230

ID

Technical University of Denmark

2005

rok

Contents

Preface i

Summary v

1. Introduction 1

2. Waste Incineration Air-Pollution-Control Residues 5

2.1 Introduction 5

2.2 Types of APC residues 5

2.3 Main characteristics 6

2.4 Acid neutralizing capacity (ANC) 10

2.5 Potential environmental impacts 13

3. Leaching Characterization 15

3.1 Introduction 15

3.2 Short and long-term leaching 16

3.3 Leaching control 22

4. Leaching Prediction 27

4.1 Introduction 27

4.2 Relating L/S to actual leaching scenarios 27

4.3 Long-term leachate concentrations 28

4.4 Solid phase depletion 31

4.5 Effects of carbonation on long-term leaching 32

4.6 Implications for leaching characterization 33

5. Cr Leaching 35

5.1 Introduction 35

5.2 Al-O2-Cr interactions 36

5.3 Cr leaching conceptual model 37

5.4 Implications for leaching testing 38

6. Conclusions 41

7. Future Work 43

8. Bibliography 45

Appendices

I) Geochemical modeling of leaching from MSWI air-pollution-control residues by Astrup, T; Dijkstra,

J.J.; Comans, R.N.J.; van der Sloot, H.A.; Christensen, T.H. Submitted to Environ. Sci. Technol.

II) Characterization of MSWI residues with respect to long-term pH development by Astrup, T.;

Jakobsen, R.; Hansen, J.B.; Hjelmar, O.; Christensen, T.H. Submitted to Waste Manage. Res.

III) Estimation of long-term leaching from waste incineration air-pollutioncontrol residues by Astrup,

T.; Mosbæk, H.; Christensen, T.H. Submitted to Waste Manage.

IV) Chromium release from waste incineration air-pollution-control residues by Astrup, T.;

Rosenblad, C.; Trapp, S.; Christensen, T.H. Environ. Sci.Technol., 39, 3321-3329.