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上海崇明岛沉积物重金属污染的磁学研究 被引量:10

Magnetic study of heavy metal pollution in sediments of Chongming Island in Shanghai
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摘要 系统分析了上海崇明岛的8个样点沉积物样品的重金属元素和磁化率、频率磁化率以及饱和等温剩磁等磁参数之间的关系,结果表明:介于轻度污染和偏中度污染的重金属Pb、C r、Cu、Zn元素与磁性矿物特别是亚铁磁性矿物之间在赋存形态、沉积特征上存在一定的联系,因此磁性测量可作为沉积物重金属污染记录信息提取的辅助手段,但不同的磁性参数对重金属的指示程度不同,由于本研究以较粗的多畴亚铁磁性矿物为主,同时质量磁化率(χ)、非磁滞剩磁磁化率与饱和等温剩磁的比值(χARM/SIRM)对重金属元素含量变化比较敏感,因而χ、χARM/SIRM可作为重金属含量的替代指标。最后在重金属元素和磁性参数相关性的基础上建立了磁诊断线性回归模型。系统分析了上海崇明岛的8个样点沉积物样品的重金属元素和磁化率、频率磁化率以及饱和等温剩磁等磁参数之间的关系,结果表明:介于轻度污染和偏中度污染的重金属Pb、Cr、Cu、Zn元素与磁性矿物特别是亚铁磁性矿物之间在赋存形态、沉积特征上存在一定的联系,因此磁性测量可作为沉积物重金属污染记录信息提取的辅助手段,但不同的磁性参数对重金属的指示程度不同,由于本研究以较粗的多畴亚铁磁性矿物为主,同时质量磁化率(χ)、非磁滞剩磁磁化率与饱和等温剩磁的比值(χARM/SIRM)对重金属元素含量变化比较敏感,因而χ、χARM/SIRM可作为重金属含量的替代指标。最后在重金属元素和磁性参数相关性的基础上建立了磁诊断线性回归模型。 This study was aimed to discuss the value of magnetic measurements of the heavy metals in polluted sediment. Eight sample sites, collected around Chongming in shanghai , were analyzed by the heavy metals Cu , Zn , Pb , Cr and magnetic parametersХ, SIRM, ХARM, ХARM/ SIRM etc. The result showed that the heavy metal contamination was changed from light to midst degree. At the same time, the similar variations of heavy metals and magnetic parameters were possible due to the absorption of the heavy metals by the ferrimagnetic minerals. The linear regression models were established to semi-quantitatively deduce the concentrations of the heavy metals using the simple, quick and non-destructive magnetic technique. The sedimentary sample correlation showed based on magnetic parametersХ, ХARM/ SIRM that the records of the heavy metals in different samples can be compared.
出处 《海洋环境科学》 CAS CSCD 北大核心 2009年第2期159-163,共5页 Marine Environmental Science
基金 上海市科学技术委员会重大资助项目(05DZ12005 07DZ12038-5) 上海市优秀学科带头人项目(07XD14010)
关键词 重金属 磁性参数 亚铁磁性矿物 相关性 Heavy metal magnetic parameter ferrimagnetic mineral correlation
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参考文献14

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