| 广东湛江湾红树林沉积物重金属分布特征及生态风险评价 |
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| 引用本文： | 孙志佳,李保飞,陈玉海,赵明杰,闫兴国,袁庆政,臧现菲.广东湛江湾红树林沉积物重金属分布特征及生态风险评价[J].海洋环境科学,2022,41(2):215-221. |
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| 作者姓名： | 孙志佳 李保飞 陈玉海 赵明杰 闫兴国 袁庆政 臧现菲 |
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| 作者单位： | 中国地质调查局烟台海岸带地质调查中心，山东 烟台 264004 |
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| 基金项目： | 广东湛江地区海岸带自然资源综合调查项目 |
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| 摘 要： | 随着人类社会经济的快速发展，红树林面临越来越严重的生态环境风险。为了掌握广东湛江湾红树林沉积物重金属污染及生态风险现状，为红树林保护、修复工作提供支撑，本研究沿湛江湾红树林分布区域采集了25个沉积物样品，分析评价了重金属的含量、相关性、富集程度和生态风险，并讨论了重金属的来源。结果表明，研究区红树林沉积物中Cu、Pb、Zn、Cr、Co、Ni、As、Cd、Mn、Hg的含量平均值分别为（9.62±6.86）×10?6、（16.70±12.13）×10?6、（29.68±21.33）×10?6、（24.17±23.32）×10?6、（2.48±2.17）×10?6、（7.22±5.19）×10?6、（4.97±4.15）×10?6、（0.14±0.08）×10?6、（118.80±115.23）×10?6、（0.16±0.04）×10?6，其中，Cd、Hg的含量分别是广东省土壤环境背景值的2.41倍和2.06倍，富集程度高于其他元素；红树林沉积物中重金属主要为自然来源，Cd受人为输入影响含量偏高，Hg主要来源于人类活动；沉积物中重金属总体为轻微污染和中等潜在生态风险，Cd、Hg两种元素均为中等污染和中等到强潜在生态风险，是研究区的主要污染物。
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| 关 键 词： | 红树林 沉积物 重金属 生态风险评价 湛江湾 |
| 收稿时间： | 2020-12-13 |
Distribution features and ecological risk assessment of heavy metals in mangrove sediments in Zhanjiang bay,Guangdong province |
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| SUN Zhi-jia,LI Bao-fei,CHEN Yu-hai,ZHAO Ming-jie,YAN Xing-guo,YUAN Qing-zheng,ZANG Xian-fei.Distribution features and ecological risk assessment of heavy metals in mangrove sediments in Zhanjiang bay,Guangdong province[J].Marine Environmental Science,2022,41(2):215-221. |
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| Authors: | SUN Zhi-jia LI Bao-fei CHEN Yu-hai ZHAO Ming-jie YAN Xing-guo YUAN Qing-zheng ZANG Xian-fei |
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| Affiliation: | China Geological Survey Yantai Coastal Zone Geological Survey Center, Yantai 264004, China |
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| Abstract: | With the rapid development of human society and economy, the ecological risk of mangrove sediments is more and more serious. In order to understand the heavy metals pollution status and ecological risk of mangrove sediments in Zhanjiang bay, Guangdong province, and provide support for the protection and restoration of mangroves, 25 samples were collected along the mangrove distribution area in this study. The content, correlation, enrichment factors and ecological risk of heavy metals were analyzed and evaluated, and the sources of heavy metals were discussed. The results showed that, the average contents of Cu, Pb, Zn, Cr, Co, Ni, As, Cd, Mn and Hg in mangrove sediments were (9.62 ± 6.86)×10?6, (16.70 ± 12.13)×10?6, (29.68 ± 21.33)×10?6, (24.17 ± 23.32)×10?6, (2.48 ± 2.17)×10?6, (7.22 ± 5.19)×10?6, (4.97 ± 4.15)×10?6, (0.14 ± 0.08)×10?6, (118.80 ± 115.23)×10?6 and (0.16 ± 0.04) ×10?6, respectively. The contents of Cd and Hg were 2.41 and 2.06 times higher than the background values of soil environment in Guangdong province. Heavy metals in mangrove sediments were mainly from natural sources. The content of Cd was high due to human activities. Hg was mainly from human activities. The pollution level of heavy metals in mangrove sediments is slight, and the potential ecological risk is moderate. Cd and Hg are the main pollutants in the study area. |
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