The Use Of Volcanic Soil As Mineral Landfill Liner - I. Physicochemical Characterization And Comparison With Zeolites  

Oleh:

Navia, Rodrigo ; Hafner, Georg ; Raber, Georg ; Lorber, Karl E. ; Schöffmann, Elke ; Vortisch, Walter

Jenis: Article from Journal - ilmiah internasional
Dalam koleksi: Waste Management & Research vol. 23 no. 3 (Jun. 2005), page 249-259.
Topik: Allophane; volcanic soil; zeolite; physicochemical characterization; mineral landfill liner; wmr 822–9
Fulltext: 249.pdf (246.08KB)

Isi artikel

The main physicochemical characteristics of the volcanic soil of Southern Chile, with allophane as the main pedogenic mineral phase were analysed and compared with common zeolites (clinoptilolite) of the European market. The ultimate goal of this study was to test volcanic soil for the use as mineral landfill liner. The main results indicated that the clay and silt fractions together of the volcanic soil were between 38 and 54%. The buffering capacity of the volcanic soil was higher compared with the studied zeolites, whereas the cationic exchange capacity of the volcanic soil (between 5.2 and 6.5 cmol+ kg–1) is of the same order of magnitude of the studied zeolites (between 9.7 and 11.4 cmol+ kg–1). Moreover, the anionic exchange capacity of the volcanic soil was higher compared to the zeolites analysed. The hydraulic conductivity of the volcanic soil, measured in the laboratory at maximum proctor density, ranges between 5.16 × 10–9 and 6.48 × 10–9 m s–1, a range that is comparable to the value of 4.51 × 10–9 m s–1 of the studied zeolite. The Proctor densities of the volcanic soil are in a lower range (between 1.11 and 1.15 g ml–1) compared with zeolites (between 1.19 and 1.34 g ml–1). The volcanic soil physicochemical characteristics are comparable to all the requirements established in the Austrian landfill directive (DVO, 2000). Therefore, the use as mineral landfill basal sealing of the analysed volcanic soil appears reasonable, having a pollutant adsorption capacity comparable to zeolites. It is of special interest for Southern Chile, because there are no alternative mineral raw materials for basal liners of landfills.

Opini Anda

Klik untuk menuliskan opini Anda tentang koleksi ini!

Kembali