本文選題：污泥 + 飛灰　； 參考：《環(huán)境污染與防治》2017年11期

【摘要】：采用熱解法,研究了不同鐵鹽種類及添加量時污泥與飛灰共熱解產(chǎn)物的重金屬浸出濃度,同時對污泥飛灰的混合比例進行進一步討論以確定經(jīng)濟有效的新型處置工藝。結(jié)果表明:整體上,不同鐵鹽對Cd、Pb、Cu和Zn浸出的影響差異顯著;單獨添加Fe_2(SO_4)_3時,熱解炭中Cd、Pb、Cu和Zn浸出濃度比單獨FeSO_4時低約67.8%、31.0%、62.8%、45.8%。添加Fe_2(SO_4)_3使Fe添加量為干污泥質(zhì)量的0.5%時,可以有效降低大多數(shù)重金屬的浸出濃度。污泥飛灰的混合比例對As、Cd、Pb和Zn浸出的影響差異顯著。熱解溫度為500℃,干污泥∶飛灰質(zhì)量比為2∶1時,加入Fe_2(SO_4)_3(Fe添加量為干污泥質(zhì)量的0.5%)后,熱解炭可在生活垃圾填埋場中填埋。
[Abstract]:The leaching concentration of heavy metal in the co-pyrolysis products of sludge and fly ash was studied by pyrolysis with different kinds of iron salts and the addition amount of ferric salt. At the same time, the mixing ratio of fly ash from sludge was further discussed in order to determine the economical and effective new disposal process. The results show that, on the whole, the effect of different iron salts on the leaching of Cu and Zn is significant, and the leaching concentration of CD PbN Cu and Zn in pyrolytic carbon is about 67.8% lower than that of FeSO_4 alone, and the concentration of Cu and Zn in pyrolytic carbon is about 67.8% and 45.8% lower than that of FeSO_4 alone. The leaching concentration of most heavy metals can be effectively reduced by adding Fe_2(SO_4)_3 when Fe content is 0.5% of dry sludge quality. The effect of mixed ratio of fly ash on the leaching of Pb and Zn was significant. When the pyrolysis temperature is 500 鈩，

本文編號：1990650