Leaching Behaviour Of Elements And Evaluation Of Pre-Treatment Methods For Municipal Solid Waste Incinerator Residues In Column Leaching Tests  

Oleh:

Kim, Sang-Yul ; Tanaka, Nobutoshi ; Matsuto, Toshihiko ; Tojo, Yasumasa

Jenis: Article from Journal - ilmiah internasional
Dalam koleksi: Waste Management & Research vol. 23 no. 3 (Jun. 2005), page 220-229.
Topik: Municipal solid waste incinerator residues; pre-treatment; water washing; carbonation; phosphate stabilization; heavy metals; column leaching tests; leaching behaviour; wmr 661–8
Fulltext: 220.pdf (491.17KB)

Isi artikel

Two new pre-treatment methods (water-washing/carbonation and carbonation/phosphate stabilization) of municipal solid waste (MSW) incinerator residues were evaluated by column leaching tests under aerobic conditions and anaerobic conditions (which were changed to aerobic conditions after 10 months). A mixture of bottom ash and fly ash (5 : 1 ratio) was pre-treated using each method. Shredded incombustible residues (SIR) were added to each ash preparation in proportions similar to the ratios present in landfills. For comparison, landfill wastes typical of Japan, namely, a mixture of bottom ash, chelating-pre-treated fly ash, and SIR, were also examined. Leachate samples were collected periodically and analysed over a 15-month period. When compared with chelating pretreatment, both water-washing/carbonation and carbonation/ phosphate stabilization reduced the leaching of Pb, Al, and Cu by about one to two orders of magnitude. Moreover, the initial concentrations of Ca and Pb in leachates from column of waterwashing/ carbonation were 56–57% and 84–96% less than those from the column of carbonation/phosphate stabilization. Therefore, water-washing/carbonation was considered to be a promising approach to obtain early waste stabilization and to reduce the release of heavy metals to near-negligible levels. The leaching behaviour of elements was also discussed.

Opini Anda

Klik untuk menuliskan opini Anda tentang koleksi ini!

Kembali