A method for determining the transfer of atmospheric deposition heavy metals in sediments

Abstract

The invention provides a method for determining transfer of atmospheric sedimentation heavy metals in sediments. The condition of the natural world is simulated by constructing a sedimentation phase,a seawater phase and an air phase in each sediment column; the sedimentation phases are clay with the particle size of 0.001-0.004 mm. With the adoption of an electric sediment segmentation device, starting and stopping of a low-speed motor are controlled through a manual remote-control device, rulers on the sediment columns are matched, the sediments can be finely divided, so that the thickness of each layer of sediments is smaller than 1 cm. Research of the transfer mechanism of the heavy metals in the sediments is facilitated by determining the flux of the heavy metals in the sedimentationphases at different depths.

Description

technical field [0001] The invention relates to the field of environment, in particular to a method for measuring the transfer of atmospheric deposition heavy metals in sediments. Background technique [0002] With the development of economy and progress of society, air pollution has become the most important environmental problem in China. The main threat of air pollution to ecology and human health comes from exposure to chemical pollution in the atmosphere. Among the various pollutions of air pollution, heavy metals are the most important species because they are bioaccumulative and harmful to the circulatory system and nervous system of the living body. cause irreversible damage. In the north, the characteristics of heavy metal content changes in the atmosphere caused by coal-fired heating have recently attracted special attention. The content of heavy metals that sink into the ocean every year and are further preserved in sediments is as high as several tons. What are...

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Problems solved by technology

[0003] At present, most studies still adopt the method of layered determination to analyze the vertical distribution of heavy metals, but the segmentation device used in the traditional segmentation method needs to be adjusted manually, and the layer height is fixed and the thickness is relatively large. Generally, a layer is 1-2cm. Due to the lack of consideration of the slow-release and trace nature of heavy metal migration in solids, the number of samples measured is too large, and the differences between layers are reduced, which makes the research results not obvious, and it is difficult to intuitively understand the concentration of heavy metals deposited in the atmosphere. Sediment Distribution Dynamics Characteristics

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