Device and method for online measurement of trace water-soluble ions by collecting atmospheric fine particles
An atmospheric fine particle, water-soluble technology, which is used in measurement devices, preparation of test samples, material separation, etc., and can solve the problems of low content, easy reaction, and inability to realize real-time detection.
Pending Publication Date: 2020-10-30
FUDAN UNIV
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Problems solved by technology
PM 2.5 PM 2.5 PM 2.5 Currently for PM 2.5 The analytical techniques and equipment for conventional chemical components (including water-soluble ions, heavy metals, carbon-containing compounds and organic substances, etc.) have been relatively mature, but for some trace components, especially some intermediates (such as sulfurous acid and sulfurous acid) Nitrate), due to reasons such as low content and easy reaction, it is still impossible to realize real-time detection
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Embodiment 1
[0034] (1) Put the collision type PM 2.5 The cutting head (7) is placed outside the window on the 6th floor of the Environment Building of Fudan University. 2.5 Under the action of cutting head (7), PM 2.5 Atmospheric fine particles with an aerodynamic equivalent diameter less than or equal to 2.5 microns are screened out and enter the water tank (9) relying on the suction provided by the main air circuit and the concentrated air circuit;
[0035] (2) Under the visible window (11), add deionized water to two-thirds of the height of the water tank, and use an electric heating rod (12) with a temperature sensor to heat the deionized water. The digital display device (13) controls the temperature at 35±2 degrees Celsius, so that the generated water vapor saturates the particles. The field experiment is carried out in summer, the ambient temperature is 25 degrees Celsius, the room temperature is 22 degrees Celsius, and the temperature of the water tank (9) is set at 35 degrees Ce...
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Abstract
The invention belongs to the technical field of environmental protection, and particularly relates to a device and a method for online measurement of trace water-soluble ions by concentrating and collecting atmospheric fine particles. The device comprises a PM2.5 cutting head, a water tank heating system, a virtual cutting system, a condensation circulating system and an online measuring system, wherein a water tank system comprises a water tank, an electric heating rod and a temperature control digital display device, the PM2.5 cutting head is communicated with the water tank, the virtual cutting system comprises a virtual cutter, a concentrated airflow vacuum pump and a main airflow vacuum pump, the condensation circulating system comprises a condensing agent circulating pipe and a condenser, the condensation circulating system is used for circulating condensate to condense and grow up saturated particulate matters, and the online measuring system comprises a biological sampling bottle, a computer subdivision constant flow pump and an online ion chromatography. The device can concentrate the actual atmospheric fine particles by 7-10 times, and the concentration efficiency is high; the sample can be directly collected and used for subsequent online analysis; and the device is simple and convenient to operate, reliable, stable and low in maintenance cost.
Description
technical field [0001] The invention belongs to the technical field of environmental protection, and in particular relates to a device and a method for online measurement of trace water-soluble ions by concentrating and collecting atmospheric fine particles. Background technique [0002] PM 2.5 Refers to particulate matter in the atmosphere with an aerodynamic equivalent diameter of less than or equal to 2.5 microns, also known as inhalable particulate matter. Although PM 2.5 It is only a small component of the earth's atmospheric composition, but it has an important impact on air quality and visibility. Atmospheric PM 2.5 The particle size is small, the specific surface area is large, it contains a large amount of toxic and harmful substances, and it has a long suspension time in the atmosphere and a long transmission distance. Therefore, the negative impact on human health and the quality of the atmospheric environment cannot be ignored. [0003] In recent years, my co...
Claims
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IPC IPC(8): G01N1/40G01N30/96
CPCG01N1/4022G01N1/4055G01N1/4077G01N30/96G01N2001/4033G01N2001/4088
Inventor 陈建民尚晓娜孙剑峰李凌隋国栋李丹朱超康慧慧
Owner FUDAN UNIV
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