Method for Monitoring the Quality of Particulate Matter in Dew Intercepted by Plant Leaves in Urban Green Area

Abstract

The invention discloses a method for monitoring and calculating the amount of particulate matter in dew intercepted by leaves of plants in urban green areas, comprising the following steps: counting the total amount of leaves of the whole plant; collecting typical plant leaves on different underlying surfaces; cleaning the surfaces of each group of leaves , divide all types of leaves into two groups, fix them on polystyrene foam boards with the fluff facing up; when dew condensation begins, place them at monitoring points, keep the polystyrene boards parallel to the ground and in the crown of plants layer height; at the time point when dew condensation turns to evaporation, take one of the foam boards back to the laboratory, shake and clean the surface of the blade with deionized water, record the amount of deionized water, and test the concentration of particulate matter in the rinse water; wait until the dew is completely After evaporation, the remaining foam board was sealed and brought back to the laboratory, and the above operation was repeated. The invention can monitor and calculate the amount of particles with different particle sizes intercepted by the leaves of plants in the green area of ​​the urban ecological system for the condensation-evaporation cycle in the dew.

Description

technical field [0001] The invention relates to the technical field of particulate matter monitoring, in particular to a method capable of effectively monitoring and calculating the amount of particulate matter intercepted by leaves of surface plants in urban green areas to dew. Background technique [0002] Dew condensation is a common meteorological phenomenon. During its formation, fine aerosols in the atmosphere are used as condensation nuclei, which play an important role in air purification. Dew condensation is a natural process of sedimentation and removal of near-surface particulate matter. The green area in the urban ecosystem is an important place for dew condensation, and the annual dew amount can reach 60mm, which is equivalent to the level of a heavy rain. The concentration of particulate matter in dew is significantly higher than that of other wet deposition forms such as rainwater. The concentration of dissolved particulate matter in dew is 271.36mg / L, and the...

AI Technical Summary

Problems solved by technology

The method used is to "use alcohol cotton balls moistened with distilled water to thoroughly elute and wipe the surface of the leaves to remove the dust trapped on the leaves", but it is not thorough to rely on wiping alone, such as some fine particles on the fluff or folds of the leaves medium, cannot be guaranteed to be completely wiped clean

Therefore, the calculation results of the existing methods are not accurate

[0007] 3. Existing methods can only calculate the total particle mass (TSP), which can be divided into inhalable particulate matter (PM 10 ) and particulate matter (PM 2.5 ) and total suspended particulate matter (TSP), etc., but cannot measure PM, which is very important for haze weather and human health. 2.5 and PM 10 and other indicators

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