Leaching behaviour of elements and evaluation of pre-treatment methods for municipal solid waste incinerator residues in column leaching tests
Leaching behaviour of elements and evaluation of pre-treatment methods for municipal solid waste incinerator residues in column leaching tests
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城市生活垃圾焚烧炉残渣柱浸试验中元素浸出行为及预处理方法评价
DOI：
10.1177/0734242x05055322
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发表时间：
2005
影响因子：
3.9
通讯作者：
Y. Tojo
中科院分区：
文献类型：
--
作者：
Sang;Nobutoshi Tanaka;T. Matsuto;Y. Tojo
通过好氧条件和厌氧条件（10个月后改为好氧条件）的柱淋试验，对城市固体废物（MSW）焚化炉残留物的两种新的预处理方法（水洗/碳化和碳化/磷酸盐稳定）进行了评价。底灰与粉煤灰的混合物（5:1）分别采用两种方法进行预处理。粉碎的不燃残留物（SIR）以类似于垃圾填埋场的比例添加到每种灰制剂中。为了进行比较，还研究了日本典型的垃圾填埋场废物，即底灰，螯合预处理粉煤灰和SIR的混合物。定期收集渗滤液样本，并在15个月内进行分析。与螯合前处理相比，水洗/碳酸化处理和碳酸化/磷酸盐稳定处理均可使Pb、Al和Cu的浸出降低约1 ~ 2个数量级。水洗/碳酸化柱的渗滤液中Ca和Pb的初始浓度分别比碳酸化/磷酸盐稳定柱低56 ~ 57%和84 ~ 96%。因此，水洗/碳化被认为是一种很有前途的方法，可以获得早期废物稳定，并将重金属的释放减少到几乎可以忽略不计的水平。还讨论了元素的浸出行为。
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 pre-treatment, 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 water-washing/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.