阳宗海不同深度沉积物中微塑料的赋存特征及来源分析  

Occurrence Characteristics and Sources of Microplastics in Sediments at Different Depths in Yangzong Lake

作　　者：吴亚屏 李菊[2] 袁志伟 陈郸 王蕊[1] 王平[3,4] 段立曾 邓春暖 WU Yaping;LI Ju;YUAN Zhiwei;CHEN Dan;WANG Rui;WANG Ping;DUAN Lizeng;DENG Chunnuan(Yunnan Key Laboratory of Plateau Geographical Processes and Environmental Change,Yunnan Normal University,Kunming 650500,China;College of Urban Construction,Yunnan Open University,Kunming 650500,China;Key Laboratory of Water Cycle and Related Land Surface Processes,Institute of Geographic Science and Natural Resources Research,Chinese Academy of Sciences,Beijing 100101,China;University of Chinese Academy of Science,Beijing 100049,China;Institute of Plateau Lake Ecology and Governance,College of Ecology and Environment,Yunnan University,Kunming 650500,China)

机构地区：[1]云南师范大学地理学部,高原地理过程与环境变化重点实验室,云南昆明650500 [2]云南开放大学城市建设学院,云南昆明650500 [3]中国科学院地理科学与资源研究所,中国科学院陆地水循环及地表过程重点实验室,北京100101 [4]中国科学院大学,北京100049 [5]云南大学生态与环境学院高原湖泊生态与治理研究院,云南昆明650500

出　　处：《云南师范大学学报（自然科学版）》2024年第4期57-63,共7页Journal of Yunnan Normal University:Natural Sciences Edition

基　　金：云南省基础研究计划资助项目(202101AT070049);云南省教育厅科学研究基金资助项目(2024J0756);云南省水利厅水利科技资助项目(2024BC202003).

摘　　要：为探究阳宗海不同深度沉积物中微塑料的污染特征及来源,于2022年6月布设8个采样点并利用重力取样器采集30 cm的沉积物短钻,采用密度浮选法分离沉积物中的微塑料,利用体视显微镜和拉曼光谱仪器对微塑料的理化特征进行检验.结果表明:阳宗海0~10 cm、10~20 cm、20~30 cm深度沉积物中微塑料平均丰度分别为(782.11±313.97)个/kg、(188.68±52.95)个/kg和(148.32±68.34)个/kg,整体平均丰度为(373.04±345.39)个/kg,丰度随深度递减.微塑料形状以纤维状为主,颜色以蓝色和透明为主,粒径主要集中在2 mm以下;主要聚合物类型为聚乙烯(PE)和聚氯乙烯(PVC).结合微塑料理化特征和周边人类活动,渔网和纺织品可能是微塑料的主要来源.To investigate the pollution characteristics and sources of microplastics in sediments of different depths in Yangzong Lake,in June 2022 short drills of 30 cm of sediment were collected from 8 sampling points in Yangzong Lake using a gravity sampler,and microplastics in the sediments were separated by density flotation,and the physical and chemical characteristics of the microplastics were examined by using stereomicroscope and Raman spectrometer.The results showed that the average abundance of microplastics in 0~10 cm,10~20 cm and 20~30 cm sediments in Yangzong Lake was(782.11±313.97),(188.68±52.95)n/kg and(148.32±68.34)n/kg.The overall average abundance was(373.04±345.39)n/kg,and the abundance decreases with depth.The shape of microplastics is mainly fibrous,and the color is blue and transparent.Furthermore,the particle size is mainly concentrated below 2 mm.The main polymer components were polyethylene(PE)and polyvinyl chloride(PVC).Fishing nets and textiles are probably the main sources of microplastics by combining with the characteristics of microplastics and surrounding human activities.

关 键 词：微塑料 空间分布 来源 湖泊沉积物 

分 类 号：K928.4[历史地理—人文地理学]