黄河郑州段河岸沉积带重金属赋存形态及来源解析

The geochemical and heavy metal accumulation characteristics in the riverbank sedimentary zone of the Zhengzhou section of the Yellow River were studiedLI Hetong1, MA Zhenfang1, HE Bing1, GAO Shuaipeng2*, HUANG Fei2,3,YANG Liuming2

关键词:  黄河  重金属  形态分析  来源解析  

Key words:  Yellow River  heavy metal  positive definite matrix factor  Source identification

摘要:

为研究黄河郑州段河岸沉积带重金属污染的特征、赋存形态和来源,采用多点混合取样的方式,样品经Tessier五步顺序提取法,通过ICP-OES测定重金属浓度,数据结果采用正交矩阵因子模型(PMF)进行来源解析。结果表明工业源、自然源、交通源和农业源对重金属污染来源的贡献率分别为52.1%、8.10%、16.9%和22.9%,工业源在其中占据主导地位。因此,黄河郑州段应进行工业排放源的管控,并重点关注Cd的排放。

Abstract:

In order to study the characteristics, occurrence forms and sources of heavy metal pollution in the riverbank sediment belt of Zhengzhou section of the Yellow River, multi-point mixed sampling was adopted. The samples were extracted by Tessier five step sequential extraction method, and the concentration of heavy metals was determined by ICP-OES. The positive definite matrix factor (PMF) was used to analyze the source of data results. The analysis results show that the contribution rates of industrial sources, natural sources, transportation sources, and agricultural sources to heavy metal pollution sources are 52.1%, 8.10%, 16.9%, and 22.9%, respectively, with industrial sources occupying the dominant position. Therefore, the Zhengzhou section of the Yellow River should control industrial emission sources and focus on Cd emissions.