Studies on Lignite Biodegradation by Rhodopseudomonas Spheroides

摘要：

The effects of lignite granularity, Rhodopseudomonas spheroids (R.s) dosage, lignite water slurry density and degradation time on lignite biodegradation effi ci ency have been investigated. The order of importance of these factors are determined as lignite granularity>slurry density> degradation time>RS dosage. The optimum lay-out of the experimental scheme within the designated interval can be stated as follows: the lignite granularity: 0.5–0.2 mm; the dosage of R.s: 5 mL/100 mL; slurry density: 0.3 g/50 mL; degradation time: 14 d. Under these conditions, the biodegradation percentage of Yi-Ma lignite which was pretreated by nitric acid was 74.30%. The degradation products were analyzed by using XRD and FTIR, which indicate that the polymerization of the aromatic nucleus and the molecular weights of products tend to drop remarkably with the obvious change of the content of the functional groups as compared with the original lignite. This study suggests a possibly high biodegradation of lignite.

关键词： environmental biology rhodopseudomonas spheroides lignite biodegradation

作者: XU Jingyao ZHANG Mingxu WEI Dezhou

作者单位: Institute of Globe and Environment,Anhui University of Science & Technology,Huainan 232001,Anhui,Chi School of Resources and Civil Engineering,Northeastern University;Shenyang 110004,Liaoning,China

会议类型: 国际会议

会议名称: 2009 International Symposium on Environmental Science and Technology(2009环境科学与技术国际会议)

会议地点: 上海

会议语种:英文

页码: 109-113

在线出版日期: 2009-06-02（万方平台首次上网日期，不代表论文的发表时间）