Guimaraes A L, Okuda T, Nishijima W, Okada M
Department of Chemical Engineering, Graduate School of Engineering, Hiroshima University, 1-4-1 Kagamiyama, Higashi Hiroshima, Hiroshima 739-8527, Japan.
J Hazard Mater. 2005 Oct 17;125(1-3):141-6. doi: 10.1016/j.jhazmat.2005.05.024.
The performance of extraction solvents, including organic and inorganic solvents, for organic carbon extraction from municipal solid waste incinerator (MSWI) bottom ash was evaluated. The total carbon (TC) extracted was used to ascertain the efficiency of extraction solvents and the reduction of dissolved organic carbon (DOC) leaching potential was used to evaluate the capacity of solvents to minimize environmental impacts of MSWI bottom ash over short- and long-term considerations in landfill sites. Extract final pH value was a prominent parameter affecting TC extraction. The higher efficiency was obtained at the lower extract final pH and acid or neutral condition was necessary to achieve approximately 30% of TC extraction from bottom ash. On the basis of the results of TC extraction, the efficiency of organic carbon reduction was evaluated using organic carbon leaching potential. Hydrochloric acid was the best solvent to extract organic carbon in controlled pH conditions. Hydrochloric acid reduced the organic carbon leaching potential of MSWI bottom ash by about 68% at neutral leaching pH.
评估了包括有机溶剂和无机溶剂在内的萃取溶剂从城市固体垃圾焚烧炉（MSWI）底灰中萃取有机碳的性能。萃取得到的总碳（TC）用于确定萃取溶剂的效率，而溶解有机碳（DOC）浸出潜力的降低则用于评估溶剂在填埋场短期和长期考量下将MSWI底灰对环境的影响降至最低的能力。萃取最终pH值是影响TC萃取的一个重要参数。在较低的萃取最终pH值下可获得更高的效率，且酸性或中性条件对于从底灰中萃取约30%的TC是必要的。基于TC萃取结果，利用有机碳浸出潜力评估了有机碳减少的效率。在控制pH条件下，盐酸是萃取有机碳的最佳溶剂。在中性浸出pH值下，盐酸可使MSWI底灰的有机碳浸出潜力降低约68%。
