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| 钦州湾沉积物中重金属的多元统计分析：空间关系、生态风险和来源识别 |
| 王伟力,林彩,刘洋,黄海宁,陈金民,孙秀武,林辉 |
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| (自然资源部第三海洋研究所, 福建 厦门 361005;广西北部湾海洋资源环境与可持续发展重点实验室, 广西 北海 536000) |
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| 摘要: |
| 海湾是海洋和陆地相互作用和人类活动最强烈的区域，沉积物中重金属的含量和分布都受到人类活动的影响。为了探究钦州湾沉积物中重金属的含量水平、污染程度和可能来源，本研究分析了钦州湾表层沉积物中Cu、Pb、Zn、Cd、Cr、Hg和As的含量及空间分布，采用地质累计指数（Igeo）和潜在生态风险指数（PERI）定量分析了重金属的污染程度和生态风险，并利用自组织映射(SOM)和正定矩阵因子分解法(PMF)模型评估了重金属的可能来源。结果表明：钦州湾表层沉积物重金属中Zn的平均含量最高，Hg平均含量最低；除个别站位的Pb含量符合海洋沉积物质量第二类标准外，其他重金属含量均符合海洋沉积物质量第一类标准；Igeo结果表明钦州湾表层沉积物主要的污染元素为Pb、Hg和Cu；PERI结果表明Hg是钦州湾表层沉积物主要的生态风险元素。SOM和PMF模型结果表明钦州湾表层沉积物重金属主要受自然来源、农业活动、工业生产活动的共同影响，各来源的相对贡献率分别为39.65%、29.15%和31.20%。 |
| 关键词: 海洋化学；表层沉积物；重金属；生态风险；PMF模型；来源 钦州湾 |
| DOI：10.3969/J.ISSN.2095-4972.20220826002 |
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| 基金项目:广西北部湾海洋资源环境与可持续发展重点实验室开放基金（MRESD-2023-A02 ） |
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| Multivariate statistical analysis of heavy metals in sediments of Qinzhou Bay: spatial relationship, ecological risk and source identification |
| WANG Weili,LIN Cai,LIU Yang,HUANG Haining,CHEN Jinmin,SUN Xiuwu,LIN Hui |
| (Third Institute of Oceanography, MNR, Xiamen 361005, China;Guangxi Key Laboratory of Beibu Gulf Marine Resources, Environment and Sustainable Development, Beihai 536000, China) |
| Abstract: |
| The bay is the area where the interaction between the sea and land and human activities is most intense, and the content and distribution of heavy metals in sediments are strongly affected by human activities. In order to determine the pollution level and possible sources of heavy metals in Qinzhou Bay sediments, this study analyzed the concentrations and spatial distributions of Cu, Pb, Zn, Cd, Cr, Hg and As, analyzed quantitatively the pollution degree and ecological risk of heavy metals by geo-accumulation index (Igeo) and potential ecological risk index (PERI), and assessed quantitatively the possible sources of heavy metals by methods of self-organization mapping (SOM) and positive matrix factorization (PMF) model. Result showed that the average concentration of Zn was the highest and the average concentration of Hg was the lowest in the surface sediments of Qinzhou Bay. SOM and PMF modelling showed that heavy metals in surface sediments of Qinzhou Bay were mainly from natural sources, agricultural activities, industrial activities, and the relative contribution rates of the sources were 39.65%, 29.15% and 31.20%, respectively. |
| Key words: marine chemistry surface sediments heavy metal ecological risk PMF model source Qinzhou Bay |