Behavior of heavy metals immobilized by co-melting treatment of sewage sludge ash and municipal solid waste incinerator fly ash

in Sciences Citation Index(SCI), 科學引文索引資料庫(SCI)
標題Behavior of heavy metals immobilized by co-melting treatment of sewage sludge ash and municipal solid waste incinerator fly ash
出版類型SCI(Sciences Citation Index)
出版年度2009
AuthorsKae-Long Lin, 林凱隆, Wu-Jang Huang 黃武章, Kuan-chung Chen 陳冠中, JING-DONG CHOW 周錦東, & His-Jien Chen 陳H. - J.
開始頁660
頁數7
出版日期2009 / 11
其他編號0000
中文摘要

This study elucidates the behavior of heavy metals in slag produced from four
different sewage sludge ashes mixed with municipal solid waste incinerator fly ash and
then co-melted. Experimental results indicate that sewage sludge ashes consisted of
SiO2, CaO, and Al2O3. Fly ash consisted of CaO, Na2O and SO3. The speciation of
sewage sludge ashes indicates that the ashes contained quartz and AlPO4. The speciation
in fly ash consisted of anhydrite, microcline, calcium chloride, sylvite and halite. The leaching behaviors of sewage sludge ashes met the Taiwan Environmental Protection
Administration’s regulatory standards. The fly ash had high concentrations of Zn and Pb; however, the leaching of these metals was low. The major components of synthetic
slags were SiO2 (33.5–54.0%), CaO (21.4–36.7%), and Al2O3 (8.1–15.7%). The X-ray
diffraction patterns of co-melted slags demonstrate that the slags contained significant amounts of glass. Most heavy metals can be fixed in a net-like structure; thus, they can not be extracted easily. The Toxicity Characteristic Leaching Procedure (TCLP) leaching concentrations for target metals in all slags met the Taiwan Environmental Protection Administration’s regulatory standards.

期刊名稱Waste Management & Research
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