文献翻译1介绍.doc

Journal of Hazardous Materials 146 (2007) 255–261 Characterization of red mud derived from a combined Bayer Process and bauxite calcination method （从结合拜耳法和铝矾土煅烧法中得出赤泥的表征） Yong Liu a, Chuxia Lin a,b, , Yonggui Wu a a College of Resources and Environment, South China Agricultural University, Guangzhou 510642, China b School of Environmental Science and Management, Southern Cross University, Lismore, NSW 2480, Australia Received 22 August 2006; received in revised form 23 October 2006; accepted 9 December 2006 Available online 13 December 2006 华南农业大学资源与环境学院，广州510642 B环境科学与管理，南十字星大学，澳大利亚，新南威尔士州的2480所学校，澳大利亚 收到了22个月2006日，收到了修订后的形式23十月2006；接受9，十二月2006 可网上13十二月2006 Abstract（摘要） Red mud can be derived from the processing of bauxite using different methods. The chemical and mineralogical composition of the combined Bayer Process and bauxite calcination red mud (BPBCRM) differs markedly from those of the pure Bayer Process red mud (PBPRM). In this study, red mud derived from a combined Bayer Process and bauxite calcination method was characterized. The results show that pH of the red mud decreased with increasing duration of storage time. Na dominated among the soluble cations, but the concentration of soluble Na decreased with increasing duration of storage time as a result of leaching. Cation exchange capacity also decreased with increasing duration of storage time, probably due to a decrease in pH causing a reduction in negatively charged sites on the red mud particles. Ca was the predominant exchangeable cation in the fresh red mud but the concentration of exchangeable Ca markedly decreased in the old red mud, which was dominated by exchangeable Na. The degree of crystallization and thermal stability of the red mud increased with increasing duration of storage. The acid neutralizing capacity of red mud obtained from this study was about 10 mol kg?1, which is much greater than the reported values for the pure Bayer Process red mud. Column filterin