郝瑞霞
个性化签名
- 姓名:郝瑞霞
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学术头衔:
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学科领域:
地球化学
- 研究兴趣:
郝瑞霞,女,生于1966年,博士, 副教授。分别于1988、1991和1995年在东北大学获得学士、硕士和博士学位。1997至1998年在中南工业大学资源环境与建筑工程学院地质系做博士后研究工作;1999至2000年在北京大学地质学系做博士后研究工作;2001年至今在北京大学地球与空间科学学院从事于教学和科研工作。兼任中国矿物岩石地球化学学会科普工作委员会委员。
主讲课程:
•《地球的化学演化》(研究生)
•《微生物与矿物的交互作用》(研究生)
•《微生物地球化学》(研究生)
•《微量元素地球化学》(本科生)
主要从事于地质微生物学、微生物地球化学、环境微生物地球化学以及微生物技术的应用研究。在国内率先开展了高磷贫锰矿石的微生物处理以及风化淋滤型富锰矿的微生物氧化研究,首次在国内从锰矿床中分离出氧化锰的细菌,并进行了锰微生物成矿实验研究;结合实验结果和理论方法完善了锰微生物地球化学,填补了国内在该研究领域的空白。
在工作期间,先后进行了多项有关上述领域的研究工作,包括石油微生物地球化学,微生物采油,石油污染物的微生物降解,含金、铜硫化物的微生物氧化作用,亚硒酸盐的微生物还原作用,铬的微生物吸附作用,萘的微生物降解等。
目前从事的主要研究工作:微生物与重金属的相互作用,煤的微生物脱硫和液化,低品位铜镍矿床的生物淋滤等。
负责完成的主要项目:
1.石油总公司“九五”攻关专项课题“耐温驱油菌株的筛选及其作用机理研究”。
2.国家博士后科研基金项目“油藏微生物及其与原油相互作用的机理研究”。
3.石油天然气集团公司石油科技中青年创新基金项目“产表面活性剂微生物驱油机理研究”。
目前承担的主要项目:
1.国家重点基础研究发展计划(973计划)课题“微生物群落控制重金属矿化作用机制与生态效应”(课题编号2007CB815601)。
2.河南登封嵩基集团科研项目“煤的微生物脱硫和液化”。发表学术论文30篇,出版专著1部,教材1部。
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【期刊论文】Conversion and degradation of crude oil by Bacillus SP3
郝瑞霞, HAO Ruixia, LU Anhuai
CHINESE JOURNAL OF GEOCHEMISTRY Vol.26, No.2, 2007,-0001,():
-1年11月30日
The objective of this study is to demonstrate the basic characteristics of Bacillus SP3 and evaluate its effect on different crude oils. Strain SP3 is a motile, gram-positive, spore-producing rod that was isolated from a reservoir of the Shengli oil field in East China. The cells of strain SP3 grew at high temperatures up to 58℃ at the pH range of 5.5–8.5. Strain SP3 grew facultatively and could use different organic substrates, and produce some metabolites such as 4-hydroxy-4-methyl-2-pentanone, methyl-2-nitrogen benzene and 1, 2-benzenedicarboxylic acid bis ester. Laboratory studies have demonstrated that the strain converted and degraded different components and changed the physical and chemical properties of crude oils. Strain SP3 degraded crude oil and the growth of bacteria on crude oil resulted in loss of aromatic hydrocarbons, resins and asphaltenes. The bioconversion of crude oils would lead to an enrichment in lighter hydrocarbons and an overall redistribution of saturate hydrocarbons. The interactions of microorganisms with crude oils are variable, depending on the microbial species and the chemical compositions of crude oils.
Bacillus SP3, metabolite, bioconversion, biodegradation, crude oil
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【期刊论文】Crude-oil-degrading thermophilic bacterium isolated from an oil field
郝瑞霞, Ruixia Hao, Anhuai Lu, Guanyu Wang
Canadian Journal of Microbiology. Mar 2004, Vol.50, 3, 175-182,-0001,():
-1年11月30日
Thermophilic bacterium strain C2, which has the ability to transform crude oils, was isolated from the reservoir of the Shengli oil field in East China. The Gram-negative, rod-shaped, nonmotile cells were grown at a high temperature, up to 83℃, in the neutral to alkaline pH range. Depending on the culture conditions, the organism occurred as single rods or as filamentous aggregates. Strain C2 was grown chemoorganotrophically and produced metabolites, such as volatile fatty acids, 1,2-benzenedicarboxylic acid, bis(2-ethylhexyl)ester, dibutyl phthalate, and di-n-octyl phthalate. It could metabolize different organic substrates (acetate, D-glucose, fructose, glycerol, maltose, pyruvate, starch, sucrose, xylose, hexadecane). The G+C content (68 mol%) and the 16S rRNA sequence of strain C2 indicated that the isolate belonged to the genus Thermus. The strain affected different crude oils and changed their physical and chemical properties. The biochemical interactions between crude oils and strain C2 follow distinct trends characterized by a group of chemical markers (saturates, aromatics, resins, asphaltenes). Those trends show an increase in saturates and a decrease in aromatics, resins, and asphaltenes. The bioconversion of crude oils leads to an enrichment in lighter hydrocarbons and an overall redistribution of these hydrocarbons.
thermophile, metabolite, crude oil, degradation, conversion
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