Dustfall collection method for separating impurities

Abstract

The invention provides a dustfall collection method for separating impurities. By adopting the method, impurities can be filtered in the course of natural subsidence and collection, thereby improving the purity degree of a collected sample, preventing the sample from directly being exposed in gas flow, effectively restraining 'secondary dusting', improving dry-type sampling efficiency and effectively decreasing the water evaporation inside a collector simultaneously so that a wet-type collection can be also carried out in drought area; the dustfall sample is directly collected in an independent sample storage unit so that the sample is more convenient to be collected and the work load is reduced; the method has wide applicable areas in both drought and humid regions and can be widely applied in research in aspects of environment, ecology, aeolian landform, sand control works and the like.

Description

technical field [0001] The invention relates to a method for collecting atmospheric dust in the monitoring of atmospheric environment quality. Background technique [0002] The existing dust collection methods and collectors have problems such as low efficiency of dry collection, inability to carry out wet collection in arid areas, contamination of samples by impurities, and cumbersome sampling procedures. The container natural collection method is a collection method that uses gravity to deposit dust in a container. It is close to the natural sedimentation process of dust and is a general method for dust collection at present. The dust cylinder is a general-purpose instrument for dust observation, which is widely used in atmospheric environment monitoring, and is also an important part of a new type of instrument - automatic dust collector. [0003] According to the difference of the fixed dust-reducing medium in the dust collection container, this method can be divided in...

AI Technical Summary

Problems solved by technology

When there are many dust observation points, this method is more cumbersome and inconvenient to operate

In addition, the existing collection methods and dust suppression cylinders also have the following disadvantages: it is difficult to achieve selective collection

Bird droppings, plant residues, insect corpses, etc. are often mixed in the dust samples, which are difficult to separate, causing sample contamination and reducing the accuracy of the data; sample cleaning is difficult

During dry collection, the rain or dew will make the dust sample and the cylinder stick together, making it difficult to clean up the site

[0005] In addition, domestic dust suppression cylinders are made of ordinary plastic, glass or ceramics, which are highly vulnerable. Factors such as sun exposure, strong wind, gravel, hail, and man-made factors can easily cause damage to the dust suppression cylinder, interrupting the collection sequence or increasing the error

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