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引用本文:何延召,柯凡,冯慕华,李文朝,陈向超,周峰.巢湖表层沉积物中生物易降解物质成分特征与分布规律.湖泊科学,2016,28(1):40-49. DOI:10.18307/2016.0105
HE Yanzhao,KE Fan,FENG Muhua,LI Wenchao,CHEN Xiangchao,ZHOU Feng.Characteristics and distribution of biodegradable compounds of surface sediments in Lake Chaohu. J. Lake Sci.2016,28(1):40-49. DOI:10.18307/2016.0105
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巢湖表层沉积物中生物易降解物质成分特征与分布规律
何延召1,2, 柯凡1, 冯慕华1, 李文朝1, 陈向超1,2, 周峰3
1.中国科学院南京地理与湖泊研究所湖泊与环境国家重点实验室, 南京 210008;2.中国科学院大学, 北京 100049;3.西北大学城市与环境学院, 西安 710127
摘要:
富营养化湖泊的藻类残体大量沉降到湖底,其中易降解成分的降解和转化快速消耗底层水体中的溶解氧,极易造成水土界面缺氧,影响湖泊生态系统的健康.于2014年对巢湖12个样点的表层沉积物进行周年跟踪研究,分析样品中有机质来源、总有机碳(TOC)、蛋白质、总糖、总脂以及生物聚合物碳(BPC)等成分含量,揭示易降解有机质的成分特征及在巢湖的分布规律.研究表明:巢湖表层沉积物TOC含量较高,全湖样点平均含量达到1.24%.BPC含量占TOC含量的30.99%~60.48%,有机质中易降解成分含量较高,并且在冬季和夏季时在巢湖西北部湖区有明显累积;有机质及其中的生物易降解部分均主要集中在粒径4~8μm的表层沉积物上,在应用工程技术手段处理、降解表层沉积物中的过量有机质时,更应该关注粒径为4~8μm的沉积物颗粒.
关键词:  巢湖  表层沉积物  有机质  生物易降解成分
DOI:10.18307/2016.0105
分类号:
基金项目:国家自然科学基金项目(41171366,41471075)、国家水体污染控制与治理科技重大专项(2012ZX07103-005-01)和中国科学院南京地理与湖泊研究所"一三五"战略发展规划项目联合资助.
Characteristics and distribution of biodegradable compounds of surface sediments in Lake Chaohu
HE Yanzhao1,2, KE Fan1, FENG Muhua1, LI Wenchao1, CHEN Xiangchao1,2, ZHOU Feng3
1.State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, P. R. China;2.University of Chinese Academy of Sciences, Beijing 100049, P. R. China;3.College of Urban and Environmental Science, Northwest University, Xi'an 710127, P. R. China
Abstract:
In eutrophic lakes large amount of algae detritus fall down to the lake bottoms every year. Dissolved oxygen in water would be consumed rapidly by labile compositions during degradation and transformation of the organic detritus, which can easily cause water hypoxia, affecting the health of lake ecosystem. Throughout the 4 seasons of 2014, 12 sampling sites for collected from surface sediments in Lake Chaohu were chosen to study the biodegradable organic components. In order to study characteristics of the labile components within the detritus and the distribution in the lake, source of organic matter, TOC, PRT, CHO, LPD and BPC contents in the samples were analyzed. Results have shown that the content of organic matter of surface sediments in Lake Chaohu is high, the average content reached 1.24%. BPC content accounts for 30.99% to 60.48% of TOC. The biodegradable organic components were relatively high, which accumulated obviously in northwestern Chaohu in winter and summer. The organic matter and biodegradable parts of surface sediments mainly adsorbed on the particle size of 48μm, so that the particles ranged from 48μm should be concerned when we use engineering measures to deal with excess organic matter in surface sediments.
Key words:  Lake Chaohu  surface sediments  organic matter  biodegradable compounds
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