Effects of different thermochemical treatments on biochar properties derived from biowastes
Two types of biochars were obtained from hydrothermal treatment (H300) and pyrolysis (P700) of biowaste. The chemical composition and surface property of the biochars were characterized and their adsorption capability was examined. The results showed that H300 contained much more oxygen and hydrogen than P700, and total oxygen-containing groups (carboxylic, lactone and phenolic) were 0.8326 and 0.1834 meq/g for H300 and P700, respectively. SEM analysis indicated that both hydrothermal and pyrolytic processes developed rough surface with new cavities on the biochars, and the BET surface areas were 20.89 m2/g and 29.44 m2/g for H300 and P700, respectively. Although H300 had lower surface area, its adsorption capacity for copper was much higher than P700 since ion exchange reaction was the predominant removal mechanism for H300, while physical adsorption was predominant for P700.
biowastes adsorption oxygen-containing group heavy metal
Liu Zhengang Zhang Fu-Shen
Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, 18 Shuangqing Road, Beijing 100085, China
国际会议
The 3rd International Conference on Waste Management and Technology(第三届固体废物管理与技术国际研讨会)
北京
英文
231-237
2008-11-05（万方平台首次上网日期，不代表论文的发表时间）