| 秦皇岛近岸海域潮间带砂质沉积物中微塑料和重金属污染特征 |
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| 引用本文： | 陈月琴,罗维,孙聪慧,吴光红.秦皇岛近岸海域潮间带砂质沉积物中微塑料和重金属污染特征[J].海洋学报,2020,42(4):113-121. |
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| 作者姓名： | 陈月琴 罗维 孙聪慧 吴光红 |
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| 作者单位： | 1.天津师范大学 天津市水资源与水环境重点实验室，天津 300387 |
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| 基金项目： | 国家重点研发计划子课题（2017YFC0505803-01）；国家自然基金国际（地区）合作与交流项目（41761144078）。 |
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| 摘 要： | 基于密度分离原理，利用饱和NaCl溶液对秦皇岛近岸海域潮间带砂质沉积物中的微塑料进行了浮选和分离提取，采用显微红外光谱方法分析附着在滤膜上的微塑料颗粒形貌和材质。结合扫描电子显微镜?能谱仪(Scanning Electron Microscopy Energy Dispersive Spectrometer，SEM-EDS)对微塑料样品进行微观形貌观察及微区成分的分析。并采用地累积指数(Geo Accumulation Indexes，Igeo)和富集系数(Enrichment Factors，EF)分析砂质沉积物中重金属Hg、Cd和Pb污染水平和富集特点。分析砂质沉积物中烧失量(Loss on Ignition，LOI)、总有机碳(Total Organic Carbon，TOC)、总氮(Total Nitrogen，TN)以及碳氮的稳定同位素组成(δ13C和δ15N)，探讨有机质的可能来源。结果表明:秦皇岛近岸海域潮间带砂质沉积物中有纤维类、发泡类、薄膜类3种微塑料，以纤维类的微塑料为主。微塑料表层富集有Si、Al、Mg、Fe和Ca等元素。沉积物中Hg和Cd富集水平较高，Pb富集水平较低。沉积物TOC和TN含量较低，LOI为TOC的1.6倍，δ13C、δ15N和TOC/TN的数值范围均显示有机质以海洋浮游植物藻类等海源为主。
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| 关 键 词： | 秦皇岛 潮间带 微塑料 重金属 营养盐 |
| 收稿时间： | 2019/6/4 0:00:00 |
| 修稿时间： | 2019/9/15 0:00:00 |
Pollution characteristics of micro plastics and heavy metals in the intertidal zone sandy sediments of the offshore area of Qinhuangdao |
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| Chen Yueqin,Luo Wei,Sun Conghui,Wu Guanghong.Pollution characteristics of micro plastics and heavy metals in the intertidal zone sandy sediments of the offshore area of Qinhuangdao[J].Acta Oceanologica Sinica (in Chinese),2020,42(4):113-121. |
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| Authors: | Chen Yueqin Luo Wei Sun Conghui Wu Guanghong |
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| Institution: | 1.Tianjin Key Laboratory of Water Resources and Environment, Tianjin Normal University, Tianjin 300387, China2.State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China |
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| Abstract: | Micro plastics in sandy sediments collected from the intertidal zone of the offshore area of Qinhuangdao were floated by saturated NaCl solution and filtrated with membrane filter. Micro plastic particles were observed using microscope and infrared spectroscopy to discuss the origin and morphology. The surface morphology of micro plastics particles was characterized by scanning electron microscopy-energy dispersive spectrometer (SEM-EDS) to analyze surface morphology and elements. The geo accumulation indexes (Igeo) and enrichment factors (EF) were used to study the pollution level and enrichment of heavy metals (Hg, Cd and Pb) in sandy sediments. Total organic carbon (TOC), total nitrogen (TN) and loss on ignition (LOI) and stable isotopes of carbon and nitrogen (δ13C and δ15N) in sandy sediments were determined in order to analyze the source characteristics. The results indicated that there were three types of micro plastics: fiber, foam and film. Fiber was in the majority of micro plastics. Micro plastic particles were enriched with Si, Al, Mg, Fe and Ca in the surface. Hg and Cd were seriously enriched, and Pb was not enriched in the sandy sediments. The concentrations of TOC and TN were low; TOC/TN ratio and stable isotopic composition of C and N (δ13C and δ15N) indicated that TOC originated from marine plankton algae. |
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| Keywords: | Qinhuangdao intertidal zone micro plastics heavy metals nutrients |
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