Decomposition of algal lipids in clay-enriched marine sediment under oxic and anoxic conditions
文献类型：CNKI期刊论文
| 作者 | Lv DW(吕冬伟); Song Q(宋茜); Wang XC(王旭晨) |
| 发表日期 | 2010-02-15 |
| 出处 | Chinese Journal of Oceanology and Limnology
 |
| 关键词 | algal organic matter decomposition marine sediments clay minerals |
| 英文摘要 | A series of laboratory incubation experiments were conducted to examine the decomposition of algal organic matter in clay-enriched marine sediment under oxic and anoxic conditions.During the 245-day incubation period,changes in the concentrations of TOC,major algal fatty acid components (14:0,16:0,16:1,18:1 and 20:5),and n-alkanes (C16-C23) were quantified in the samples.Our results indicate that the organic matters were degraded more rapidly in oxic than anoxic conditions.Adsorption of fatty acids onto clay minerals was a rapid and reversible process.Using a simple G model,we calculated the decomposition rate constants for TOC,n-alkanes and fatty acids which ranged from 0.017-0.024 d-1,0.049-0.103 d-1 and 0.011 to 0.069 d-1,respectively.Algal organic matter degraded in two stages characterized by a fast and a slow degradation processes.The addition of clay minerals montmorillonite and kaolinite to the sediments showed significant influence affecting the decomposition processes of algal TOC and fatty acids by adsorption and incorporation of the compounds with clay particles.Adsorption/association of fatty acids by clay minerals was rapid but appeared to be a slow reversible process.In addition to the sediment redox and clay influence,the structure of the compounds also played important roles in affecting their degradation dynamic in sediments. |
| 文献子类 | CNKI期刊论文 |
| 资助机构 | Supported by the National Natural Science Foundation of China (Nos. 40476038 and 40576039) |
| 卷 | v.28期:01页:133-145 |
| 语种 | 英文; |
| 分类号 | X703 |
| ISSN号 | 0254-4059 |
| 源URL | [http://ir.qdio.ac.cn/handle/337002/192253]  |
| 专题 | 中国科学院海洋研究所 |
| 作者单位 | 1.MarineBiogeochemistryLaboratory,InstituteofOceanology 2.MarineBiogeochemistryLaboratory,InstituteofOceanology,ChineseAcademyofSciences 3.GraduateSchoolofChineseAcademyofSciences 4.Collegeoffoodandwine,ChinaAgricultureUniversity(Yantai) 5.DepartmentofEnvironmental,EarthandOceanSciences,UniversityofMassachusettsBoston |
| 推荐引用方式 GB/T 7714 | Lv DW,Song Q,Wang XC. Decomposition of algal lipids in clay-enriched marine sediment under oxic and anoxic conditions. 2010. |
入库方式： OAI收割
来源：海洋研究所
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