| 引用本文： |
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傅开哲,龙军桥,陈泽恒,丁伟品,黄赞慧.陵水、新盈红树林和海草湿地表层沉积物重金属分布及污染特征[J].广西科学,2023,30(2):277-290. [点击复制]
- FU Kaizhe,LONG Junqiao,CHEN Zeheng,DING Weipin,HUANG Zanhui.Spatial Distribution and Pollution Characteristics of Heavy Metals in Surface Sediments of Lingshui,Xinying Mangrove and Seagrass Wetlands[J].Guangxi Sciences,2023,30(2):277-290. [点击复制]
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| 摘要: |
| 为深入研究海南岛陵水、新盈两大典型生态系统的风险状况，采集研究区红树林和海草湿地70组沉积物样品进行理化分析。利用差值分析、地累积指数分析、生态风险分析、相关性分析和主成分分析等数理统计方法对重金属污染特征进行分析和评价，研究不同类型湿地表层沉积物重金属含量和污染特征。结果表明：研究区红树林和海草湿地沉积物重金属As地累积指数明显高于Cr、Cu和Pb，为偏中度污染，存在中度生态风险，而Cr、Cu和Pb的生态风险较小。陵水、新盈红树林沉积物中Cr、Cu、As和Pb具有相似的来源，即主要来源于自然环境，其次来源于人类活动，As超标与研究区域周边存在大面积的鱼虾养殖、船坞停放等人类活动因素有关。 |
| 关键词: 滨海湿地 表层沉积物 重金属 空间分布 污染评价 |
| DOI：10.13656/j.cnki.gxkx.20230529.007 |
| 投稿时间：2021-11-29修订日期：2022-03-07 |
| 基金项目:中国地质调查局“琼海-万宁海岸带综合地质调查项目(DD20208012)”和“海南岛湿地资源现状试点调查项目(DD20208061)”资助。 |
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| Spatial Distribution and Pollution Characteristics of Heavy Metals in Surface Sediments of Lingshui,Xinying Mangrove and Seagrass Wetlands |
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FU Kaizhe, LONG Junqiao, CHEN Zeheng, DING Weipin, HUANG Zanhui
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| (Haikou Marine Geological Survey Center, China Geological Survey, Haikou, Hainan, 571127, China) |
| Abstract: |
| In order to study the risk status of the two typical ecosystems of Lingshui and Xinying in Hainan Island,70 groups of sediment samples from mangrove and seagrass wetlands in the study area were collected for physical and chemical analysis.The characteristics of heavy metal pollution were analyzed and evaluated by mathematical statistics methods such as difference analysis,geo-accumulation index analysis,ecological risk analysis,correlation analysis and principal component analysis,and the heavy metal content and pollution characteristics of surface sediments in different types of wetlands were studied.The results showed that the geo-accumulation index of As was significantly higher than that of Cr,Cu and Pb in the sediments of mangrove and seagrass wetlands in the study area,which was moderately polluted and had moderate ecological risk,while the ecological risk of Cr,Cu and Pb was small.Cr,Cu,As and Pb in Lingshui and Xinying mangrove sediments have similar sources，that was,mainly from the natural environment,followed by human activities.The excess of As was related to human activities such as large-scale fish and shrimp aquaculture and dock parking around the study area. |
| Key words: coastal wetland surface sediment heavy metals spatial distribution pollution assessment |
