湛江湾潮间带表层沉积物有机质分布特征及来源分析  

Distribution Characteristics and Sources of Organic Matters in Surface Sediments in Intertidal Zone of Zhanjiang Bay

作　　者：李颖诗 吴华杰 李基秀 唐潇 连靖 夏嘉 高苑 Li Yingshi;Wu Huajie;Li Jixiu;Tang Xiao;Lian Jing;Xia Jia;Gao Yuan(College of Chemistry and Environmental Science,Guangdong Ocean University,Zhanjiang 524088,China)

机构地区：[1]广东海洋大学化学与环境学院,广东湛江524088

出　　处：《广东化工》2024年第1期139-142,共4页Guangdong Chemical Industry

基　　金：大学生创新创业训练计划(S202110566061)。

摘　　要：本研究以湛江湾海滨公园、渔港公园和东海岛潮间带为研究区域,对这些区域潮间带表层沉积物的总氮(TN)、总有机碳含量(TOC)、TOC/TN比值和稳定碳同位素比值(δ13C_(org))进行了研究,分析了湛江湾潮间带表层沉积物TOC、TN、δ13C_(org)的分布特征和有机质的来源。结果表明,湛江湾表层潮间带沉积物样品的TOC含量为0.03%~1.28%,平均值为0.51%,TN含量为0.002%~0.121%,平均值为0.05%,TOC/TN范围为7.75~20.36,平均值为12.15,δ13C_(org)范围为-26.25‰~-22.13‰,平均值为-24.24‰。湛江湾潮间带表层沉积物有机质的来源主要是海洋和陆地混合源,主要来自C3陆生植物和海洋藻类植物,少量来自挺水植物和贝类生物沉积物,它们可能受到研究地区的地理环境、沉积物粒度、港口运输、生活废水和海洋渔业等多种因素影响。This study investigated the total organic carbon content,total nitrogen,TOC/TN ratio and stable carbon isotope in the intertidal zone surface sediments taking from Seaside Park,Yugang Park and Donghaidao Island intertidal zone in Zhanjiang bay.Distribution characteristics of TOC,TN,δ13C_(org) and source of organic matter in intertidal surface sediments in Zhanjiang bay were analyzed.The results showed that the TOC contents in the sediments were between 0.03%~1.28%,the average value is 0.51%,the TN contents were between 0.002%~0.121%,the average value is 0.05%.The value of TOC/TN ranged from 7.75 to 20.36,and the average value was 12.15.The range ofδ13C_(org) value were from-26.25‰to-22.13‰,and the average value was-24.24‰.The sediment organic matter of surface in the intertidal zone of Zhanjiang bay were mainly originated from marine and terrestrial mixed sources,most of which come from C3 terrestrial plants and marine algae.A small part of the organic matter may come from emergent plants and shellfish biological deposits,which may be affected by the environment of the study area such as geographical environment,sediment particle size,port transportation,domestic wastewater and marine fishery.

关 键 词：湛江湾 潮间带沉积物 总有机碳 稳定碳同位素 有机质来源 

分 类 号：TQ[化学工程]