摘要
研究了污泥与煤按不同质量比例混烧后,底灰中的重金属形态分布与浸出毒性.结果表明:30∶70的泥煤比使底灰中重金属硫化物及有机态和残渣态所占比例最大,即生物无效部分比例最大;在浸出毒性实验中,30∶70的泥煤比使底灰重金属浸出量最小.由此推出,对环境毒害程度最小的泥煤质量比为30∶70即该实验条件下最优泥煤质量比为30∶70.
The heavy metal speciation distribution and leaching toxicity are analyzed in bottom ashes produced by co-combustion of sewage sludge and coal with different ratios. The results show that the biologically invalid portions, namely sulfuric, organic and residual forms of heavy metal increase to maximum with the ratio of sewage sludge to coal being 30%. Meanwhile, the leaching toxicity of heavy metal is least with the ratio of sewage sludge to coal be- ing 30%. The conclusion of optimum ratio of sewage sludge to coal under our experiment condition is 30%, or in other words, the 30% of sewage sludge to coal ratio in co-combustion can dispose of the sewage sludge effectively as well as discharge least heavy metal toxicity to the environment.
出处
《南京信息工程大学学报（自然科学版）》
CAS
2013年第3期244-250,共7页
Journal of Nanjing University of Information Science & Technology（Natural Science Edition）
基金
国家自然科学基金(50979028)
关键词
泥煤质量比
混烧
底灰
重金属形态
毒性
ratio of sewage sludge to coal
co-combustion
bottom ashes
heavy metal speciation
toxicity
