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| 浙江近岸海域表层沉积物重金属分布特征与生态风险评价 |
| Distribution Characteristics and Ecological Risk Assessment of Heavy Metals in Surface Sediments from Zhejiang Offshore |
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| DOI： |
| 中文关键词: 重金属 分布特征 生态风险评价 相关性分析 表层沉积物 浙江近岸海域 |
| 英文关键词: Heavy metals Distribution characteristic Ecological risk assessment Correlation analysis Surface sediments Zhejiang offshore area |
| 基金项目:国家自然科学基金资助项目（No.52109092）；长江三角洲海岸带综合地质调查与监测基金资助项目（No.GZH201200506）；国家级大学生创新创业训练基金资助项目（No.202110340034） |
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| 中文摘要: |
| 通过对浙江近岸海域477个表层沉积物样品粒度，以及样品中6种元素（Cu、Pb、Zn、Cr、Cd和As）和总有机碳（TOC）的分析，探讨重金属的空间分布特征及其生态风险。结果表明，研究区表层沉积物中重金属元素含量的空间分布较为相似，总体上表现为近岸高、远岸低；6种元素具有相似来源，与沉积物平均粒径和TOC均呈正相关性，且细颗粒泥质沉积物和TOC分别是导致其富集累积的主要和次要影响因素；6种元素的地累积指数较低，重金属污染总体上处于轻度水平；6种元素潜在生态风险系数由大到小依次为Cd＞As＞Pb＞Cu＞Cr＞Zn，总体上潜在生态风险程度轻微；地累积指数和综合潜在生态风险指数均表现为向岸海域的重金属污染程度远大于离岸海域。 |
| 英文摘要: |
| This study explored the spatial distribution characteristics and ecological risk of heavy metals by analyzing the grain size of 477 surface sediment samples and the contents of six elements（Cu， Pb， Zn， Cr， Cd， As） and total organic carbon（TOC）in these samples from Zhejiang offshore. The results showed that the spatial distribution of heavy metals in surface sediments from the study area was similar， with high content near shore and low content far shore. The six elements had similar sources and were positively correlated with the mean grain size and TOC. Fine grained muddy sediments and TOC were the primary and secondary influencing factors leading to enrichment and accumulation， respectively. The geoaccumulation index of the six elements was relatively low， and heavy metal pollution was generally at a mild level. The potential ecological risk coefficients of the six elements were Cd， As， Pb， Cu， Cr， Zn in descending order， and their potential ecological risks were slight. Both geoaccumulation index and comprehensive potential ecological risk index showed that heavy metal pollution in onshore area was much heavier than that in offshore waters. |
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