中国农业大学学报2013，Vol.18Issue(2)：189-194,6.
市政污泥生物质炭重金属含量及其形态特征
Characteristics of the form and concentration of heavy mentals in the biochar made from municipal sewage sludge
摘要
Abstract
This study is concerned on the development of a new approach for resource utilization of municipal sewage sludge. The oven-dried municipal sewage sludge was pyrolized under 200,300,500 and 700℃ . The product of biochar was analyzed for the form and concentration of heavy metals. The objective was to investigate the influence of pyrolysis temperature on the form and concentration of heavy metals in the biochar. The results showed that the pyrolysis treatment influenced not only the concentration, but the form of heavy metals in the biochar as well. The total heavy metals in the biochar increased with increasing pyrolysis temperature. Low temperature of 200 ℃ could result in complete ventilation of Hg,enhancing acid-extractable As,Cd,Mn and Zn. However, when the temperature was higher than 300℃ ,the proportion of residual heavy metals increased largely, usually up to 50% of the total. The proportions of oxidable,reducible and acid-extractable heavy metals increased with increasing pyrolysis temperature. It is evident that pyrolysis treatment of municipal sewage sludge reduces the bioavailability of heavy metals though enhances the concentration.关键词
市政污泥/高温裂解/生物质炭/重金属Key words
municipal sewage sludge/ pyrolysis/ biochar/ heavy metals分类
农业科技引用本文复制引用
马涛,宋元红,李贵桐,赵小蓉,林启美..市政污泥生物质炭重金属含量及其形态特征[J].中国农业大学学报,2013,18(2):189-194,6.基金项目
国家自然基金项目(41071206) （41071206）
