重金属在互花米草盐沼湿地中的富集及迁移规律

南京大学学报(自然科学版) ›› 2014, Vol. 50 ›› Issue (5): 695–705.

重金属在互花米草盐沼湿地中的富集及迁移规律

陈莲1，高建华1,2*，冯振兴1，徐夏楠1，朱庆光1，徐粲1

出版日期:2014-09-15 发布日期:2014-09-15
作者简介:(1．南京大学地理与海洋科学学院,南京,210093;2．海洋沉积与环境地质国家海洋局重点实验室,青岛,266061)
基金资助:
江苏省自然科学基金重点研究专项（BK2011012）,海洋公益性行业科研专项经费项目“南黄海辐射沙脊群空间开发利用及环境生态评价技术”（201005006-01）,海洋沉积物与环境地质国家海洋局重点实验室开放基金（MASEG201205）

The regular pattern of enrichment and migration of heavy metals in S. alterniflora marsh

Chen Lian1, Gao Jianhua1,2, Feng Zhenxing1, Xu Xianan1, Zhu Qingguang1, Xu Can1

Online:2014-09-15 Published:2014-09-15
About author:(1. School of Geographic and Oceanographic Sciences, Nanjing University, Nanjing,210093,China 2.The State Oceanic Administration Key Laboratory for Marine Sedimentary and Environmental Geology, Qingdao, 266000, China)

摘要/Abstract

摘要： 以王港潮滩湿地互花米草-沉积物为研究对象，分析了Cu、Zn、Pb、Cr和Mn5种元素在该植物体内的积累、富集及迁移规律。结果表明，盐沼湿地重金属含量的垂向变化受粒径的影响比较小，主要受控于植物地下生物量的大小；枯枝落叶中重金属释放分解主要发生在60天以内；互花米草体内元素的积累与分配主要取决于植物生物量的积累及其各组分中元素的含量；互花米草对5种重金属元素的吸收有一定的选择性，植物不同部位的累积存在差异，Mn表现为叶>茎>根，Cu、Zn极大部分在根部累积，Pb和Cr的表现为根>叶>茎；该植物对5种重金属元素的迁移效率表现为Mn>Pb>Cr>Zn>Cu。

Abstract: We regard Spartina alterniflora and sediments in the Wanggang tidal wetland as the object of the study and analyse the regular pattern of accumulation, enrichment and migration of the five elements-Cu, Zn, Pb, Cr and Mn in the system. The results showed that the vertical variation of the concentration of heavy metal in salt marsh was slightly affected by grain size and it was mainly controlled by the plant’s underground biomass; the decomposition of heavy metal occurred mainly within 60 days; the total of elements in Spartina alterniflora mainly depended on plant’s biomass and the concentration; and the absorption of heavy metal elements of Spartina alterniflora had certain selectivity. The total heavy metals in different parts of the plant were different. The preferential order of Mn in different parts was leave＞stem＞root. Cu and Zn mainly accumulated in root .The preferential order of Pb and Cr in different parts was root＞ leave＞stem; The preferential order of transport efficiency was Mn>Pb>Cr>Zn>Cu

陈莲1，高建华1,2*，冯振兴1，徐夏楠1，朱庆光1，徐粲1. 重金属在互花米草盐沼湿地中的富集及迁移规律[J]. 南京大学学报(自然科学版), 2014, 50(5): 695–705.

Chen Lian1, Gao Jianhua1,2, Feng Zhenxing1, Xu Xianan1, Zhu Qingguang1, Xu Can1. The regular pattern of enrichment and migration of heavy metals in S. alterniflora marsh[J]. Journal of Nanjing University(Natural Sciences), 2014, 50(5): 695–705.

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