Relationships between heavy metal concentrations in soils and reclamation history in the reclaimed coastal area of Chongming Dongtan of the Yangtze River Estuary, China
Relationships between heavy metal concentrations in soils and reclamation history in the reclaimed coastal area of Chongming Dongtan of the Yangtze River Estuary, China
复制标题
长江口崇明东滩围垦区土壤重金属浓度与围垦历史的关系
DOI：
10.1007/s11368-014-0976-3
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发表时间：
2014
期刊：
影响因子：
--
通讯作者：
Zhang Chaosheng
中科院分区：
文献类型：
--
作者：
Han Xiumei;Wang Li;Gao Xiaojiang*;Zhang Chaosheng
PurposeReclaimed coastal wetlands are an important land resource because of the shortage of cultivated land in coastal areas, but few studies have focused on contamination of heavy metals in reclaimed agricultural soils, especially in soils that have experienced long-term agricultural activities. This study was carried out in Chongming Dongtan of the Yangtze Estuary, which has undergone large-scale reclamation activities, with the aim of determining the concentrations and spatial distributions of heavy metals in different reclaimed zones.Materials and methodsIn this study, 50 soil samples were collected in the study area, which was divided into three zones based on the history of reclamation (post-1998, 1990s, and 1960s) and intertidal flats. Soil metals (Al, Fe, Mn, Cu, Cr, Ni, Zn, and Pb), soil pH, Eh, salinity, soil organic matter (SOM), and grain sizes were analyzed. Correlation analysis and factor analysis were employed to extract the main influencing factors on heavy metals in reclaimed soils. Al-normalization was used to remove the grain-size effect. The enrichment ratio (ER) was applied to reflect the chronological change of heavy metals after reclamation. Inverse distance weighted (IDW) interpolation was used to create spatial distribution maps of the measured heavy metals.Results and discussionThere were significant positive correlations (p< 0.01) between the fine particle fractions (<20 μm) of soils and metal concentrations. Background deposition of metals in the study area increased relative to the reference values of each zone during the last 50 years. In zone post-1998, the concentrations of Cu, Zn, and Pb after reclamation were lower than those before reclamation, but not for Cr; in zone 1960s and 1990s, the concentrations of Cu, Cr, Zn, and Pb were higher than those before reclamation. In all the zones, the reclamation process had little impact on the mobilization of Ni. Our results showed that after Al-normalization, the differences of heavy metal concentrations between different zones and their spatial distribution patterns were due to the combined effects of both background deposition and anthropogenic processes, particularly in zone 1960s.ConclusionsThe current heavy metal concentrations were mainly determined by the deposition background in Chongming Dongtan, but the reclamation history had certain effects on heavy metal concentrations in the reclaimed soils. The desalination leaching effect on heavy metals was mainly found for soils with short-term reclamation (zone post-1998), but with longer reclamation history (like zone 1960s and 1990s); long-term agricultural activities had greatly influenced the concentrations of heavy metals.
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影响因子：
4.2
作者：
D. Romić;M. Romić;M. Zovko;Helena Bakić;G. Ondrašek
通讯作者：
D. Romić;M. Romić;M. Zovko;Helena Bakić;G. Ondrašek
DOI：
--
发表时间：
2003
期刊：
Territory & Natural Resources Stuty
影响因子：
--
作者：
GU Cheng-jun
通讯作者：
GU Cheng-jun
DOI：
10.1023/a:1012962604095
发表时间：
2002
期刊：
Water, Air, and Soil Pollution
影响因子：
--
作者：
Z. Nan;Chuanyan Zhao;Jijun Li;Fahu Chen;Wu Sun
通讯作者：
Z. Nan;Chuanyan Zhao;Jijun Li;Fahu Chen;Wu Sun
DOI：
10.1053/ctep.2002.34238
发表时间：
2002-06
期刊：
Clinical Techniques in Equine Practice
影响因子：
--
作者：
K. H. Plumlee
通讯作者：
K. H. Plumlee
影响因子：
4.9
作者：
Chao Sun;C. Bi;Zhenlou Chen;Dongqi Wang;Cui Zhang;Yuedi Sun;Zhongjie Yu;Dong Zhou
通讯作者：
Chao Sun;C. Bi;Zhenlou Chen;Dongqi Wang;Cui Zhang;Yuedi Sun;Zhongjie Yu;Dong Zhou