生态环境学报2012，Vol.21Issue(3)：509-514,6.
厦门近海沉积物中高分子有机质的来源初探
Primary research on origins of the macromolecular organic matters in offshore sediments in Xiamen
摘要
Abstract
A promoted comprehensive-wet-chemical procedure was performed to extract three Macromolecular Organic Matters (MOMs), including humic acid (HA), kerogen and black carbon (KB) and black carbon (BC), from marine sediments, which were collected in Xiamen Bay during July and December in 2010. The origins of three extractions were characterized by scanning electron microscopy (SEM) and stable carbon isotope (δ13C) analysis. The results of SEM showed that many of marine-derived materials were observed (eg: calcium diatoms, and coscinodiscus or stephanodiscus hantzschii). Wood debris and algaenan that origined from marine were discovered in KB samples, which indicated that the importance of the multiple sources. The δ13C analysis shown that the terrestrial contribution ranged from 58.32%~84.45%, which was the predominant contribution to the MOMs in the sediments. And the δ13C values in summer were lower than that in winter, which was connected with the contribution of C3 plants and aquatic plants in the ecosystem. In addition, the discharge of sewage, coal combustion and coal debris floating down from shipping were also the reasons to lead this phenomenon.关键词
高分子有机质/腐殖酸/干酪根/碳黑/扫描电镜/稳定碳同位素Key words
macromolecular organic matter/ humic acid/ kerogen/ black carbon/ scanning electron microscopy/ carbon stable isotope分类
资源环境引用本文复制引用
陈衍婷,赵金平,尹丽倩,陈进生,袁东星,胡恭任..厦门近海沉积物中高分子有机质的来源初探[J].生态环境学报,2012,21(3):509-514,6.基金项目
近海海洋环境科学国重室青年访问学者基金项目(MELRS1017) （MELRS1017）
国家自然科学基金项目(No.41005082) （No.41005082）
