南麂列岛大型海藻重金属元素含量特征分析

发布时间：2018-01-30 16:14

本文关键词： 南麂列岛大型海藻重金属生物富集富集系数　出处：《海洋环境科学》2017年03期 　论文类型：期刊论文

【摘要】：利用原子吸收光谱法及原子荧光光谱法,分别对2010年5月和2011年4月采集的南麂列岛(121°01'~121°08'E,27°25'~27°30'N)13种常见大型海藻中8种重金属(Fe、Zn、Mn、Cu、As、Cr、Cd和Hg)含量进行检测,并利用聚类分析及主成分分析法考察南麂列岛大型海藻对重金属的富集特征。结果表明:不同藻类体内各重金属含量存在显著差异,同种藻类中各重金属含量也不相同。所测海藻中重金属含量平均值由高到低依次为:FeZnMnAsCuCrCdHg,Fe和Cu在绿藻门中含量最高,Mn和Zn在红藻门中最高,As则在褐藻门中最高。Fe在石莼中富集系数最高,达200553,Cu在缘管浒苔中富集系数最高,为12992;Zn、Mn、Cr和Cd在小石花菜中富集系数最高,分别为46357、31921、25192和27556;As在鼠尾藻中富集能力最强,其富集系数为65278;Hg在铜藻中富集系数最高,为3165;富集系数最小的是珊瑚藻对Hg富集,仅为515。13种海藻对重金属的富集能力综合排序表现为:小石花菜鼠尾藻石莼萱藻缘管浒苔海萝蜈蚣藻粗枝软骨藻珊瑚藻铜藻鹅肠藻铁钉菜羊栖菜。
[Abstract]:Atomic absorption spectrometry (AAS) and atomic fluorescence spectrometry (AFS) were used to study the samples collected from Nanji Islands on May 2010 and April 2011, respectively. The contents of 8 heavy metals in 13 species of common macroalgae (27 掳25) were determined. Cluster analysis and principal component analysis were used to investigate the enrichment characteristics of heavy metals in macroalgae of Nanji Islands. The results showed that there were significant differences in the contents of heavy metals in different algae. The contents of heavy metals in the same algae are also different. The average values of heavy metals in the same algae are: 1 FeZnMnAsCuCrCdHgCU Fe and Cu are the highest in the phylum of Chlorophyta. Mn and Zn are the highest in the phylum of red algae, while the highest in the phylum of brown algae. Fe is the highest in Ulva pertusa, and the enrichment coefficient of Cu in Ulva pertusa is the highest (12992). The enrichment coefficient of Zn ~ (2 +) mn ~ (2 +) Cr and CD were 46357 ~ 31921 ~ 25192 and 2755 ~ (6) respectively. The enrichment coefficient of as was 65278; The enrichment coefficient of Hg in copper algae was 3165; The lowest enrichment coefficient is the accumulation of Hg by coral algae. The enrichment ability of 515.13 species of algae to heavy metals was as follows: Lactuca pertussis, Lactuca pertussis, Lactuca capulifolia, Cyclophora spp.
【作者单位】：温州医科大学生命科学学院;浙江省海洋水产养殖研究所;南麂列岛国家海洋自然保护区管理局;
【基金】：国家海洋公益性研究专项(201105008-4) 温州市科技计划项目(S20140031)
【分类号】：X55
【正文快照】： 随着工农业生产的发展和矿山资源开采,大量含重金属的废水被排放至环境中,随降雨和地表径流进入海洋,对海洋环境造成污染[1]。由于重金属在海洋环境中复杂的赋存形态,通过测定水体及沉积物中重金属总量难以预测其对海洋生物的毒性效应[2-3]。大型海藻是海洋的初级生产者,分布

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