Heavy Metal Toxicity Study of Bottom Ashes from Co-combustion of Sludge and Slime
This paper studied the co-combustion of sludge and coal slime mixed in different proportion(0％, 10％, 20％, 30％, 40％) in CFB devices of Luzhi town of Suzhou city of Jiangsu. and the form distribution and the leaching-out toxicity of heavy metal(Cd, Pb, Zn, Mn, Fe, Cu, Ni, Cr) in the bottom ash. The results shows that if the temperature of the circulating fluidized bed can be kept around 1200 ℃ and sludge/slime ratio does not exceed 40％, the burning process can conduct well. The bottom ashes produced by burning of sludge and slime contain various forms of heavy metal. When sludge/ slime ratio reaches 30％, heavy metal sulfide in organic and residual states existing in the bottom ashes accounts for the most, that is to say ,biological active part accounts for less. Also, while the amount of heavy metal leached out from bottom ashes is the smallest. So, sludge/slime ratio had better be around 30％.
Xiaoli Zhao Wei Zhu DefiiXu LinqianQiu ChuangYang Rui Liang
Department of Environmental Science & Engineering, Hohai university Nanjing , China 210098 Departm Department of Environmental Science & Engineering, Hohai university Nanjing , China 210098 Department of Environmental Science & Engineering Nanjing University of Informational Science & Te
国际会议
北京
英文
211-212
2011-11-24（万方平台首次上网日期，不代表论文的发表时间）