| 摘要: |
| 海滩作为海陆交汇和人类活动最为频繁的区域之一，由于排污、附近工厂和垃圾倾倒等造成的重金属污染问题亟须重视。研究以山东南部日照市海滨国家森林公园、芙蓉村、涛雒镇三个海滩为例，对其表层与垂向沉积物中的Cr、Ni、V、Fe、Zn、Co、Pb共7种重金属含量进行测试，并使用污染负荷指数法(PLI)与地质累计指数法(Igeo)进行评价。同时对样品进行环境磁学参数测试并建立海滩沉积物重金属污染的磁学诊断模型。PLI显示，三个海滩均处于污染状态，污染程度为森林公园海滩<芙蓉村海滩<涛雒镇海滩。Igeo结果表明，森林公园海滩存在V污染，污染样品占比18 %； 芙蓉村海滩存在Ni和V污染，污染样品占比约33%；涛雒镇海滩存在Cr、Ni、V污染，污染样品占比约38 %。研究区海滩重金属污染产生的主要原因为当地的工业生产以及水产养殖废水排放。磁参数归一化多元线性分析显示，χ、SIRM、χARM三个参数和重金属元素含量关系密切，可以较好指示重金属含量和污染程度。质量磁化率诊断结果表明，当日照市海滩0.063~0.125 mm粒级沉积物磁化率值大于1000×10-8 m3kg-1时，需要注意海滩可能存在重金属元素污染，可进行更深一步的污染评估。 |
| 关键词: 重金属 污染评价 环境磁学 海滩 磁学诊断 |
| DOI：10.11693/hyhz20221200338 |
| 分类号:P736.4 |
| 基金项目:山东省自然科学基金；科技基础资源调查专项；国家重点研发计划 |
相关附件： 20221200338 审稿意见回复 |
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| Evaluation and magnetic diagnosis of heavy metal pollution in sediments of beaches in southeastern Shandong Province |
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WANG Kai-Wei, WANG Yong-Hong, WANG Xiao-Yu
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Ocean University of China
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| Abstract: |
| As one of the areas where the sea and land converge and where human activities are most frequent, heavy metal pollution caused by sewage, nearby factories, and garbage dumping needs urgent attention. This study took three beaches, namely Rizhao Seashore National Forest Park Beach, Furong Village Beach, and Taoluo Town Beach in southeastern Shandong Province as examples. The content of Cr, Ni, V, Fe, Zn, Co, and Pb in their surface and vertical sediments was tested, and evaluated using the pollution load index (PLI) and the index of geoaccumulation (Igeo). Additionally, environmental magnetic parameters were tested on the samples to establish a magnetic diagnostic model for heavy metal pollution in beach sediments. The PLI showed that all three beaches were polluted, with the degree of pollution being Forest Park Beach < Furong Village Beach < Taolu Town Beach. The Igeo results showed that Forest Park Beach had V pollution, with 18% of the samples being contaminated, Furong Village Beach had Ni and V pollution, with about 33% of the samples being contaminated, and Taolu Town Beach had Cr, Ni, and V pollution, with about 38% of the samples being contaminated. The main causes of heavy metal pollution in the study area are local industrial production and aquaculture wastewater discharge. Normalized multivariate linear analysis of magnetic parameters showed that the three parameters χ, SIRM, and χARM were closely related to the content of heavy metal elements, which can better indicate the content of heavy metals and the degree of pollution. Mass magnetic susceptibility diagnosis results showed that when the value of magnetic susceptibility of Rizhao city beach sediment of 0.063~0.125 mm grain size is greater than 1000×10-8 m3kg-1, attention should be paid to the possible pollution of the beach with heavy metal elements, and a deeper pollution assessment can be carried out. |
| Key words: heavy metals pollution evaluation environmental magnetism beaches magnetic diagnosis |