Collection device for denitrification simulation system gas products in underground water

Abstract

The invention discloses a collection device for denitrification simulation system gas products in underground water, and belongs to the field of hydrogeology and environmental science. The gas products are collected and metered through the complete device by combining an exhaustion method with a drainage method. The device comprises a liquid supplementing device, a denitrification simulation reaction device, an exhausting device, a gas collecting device, a drainage device and a metering device which are sequentially connected; the designed exhausting device and the denitrification simulation device are connected through a flange, the liquid supplementing device and the denitrification simulation device are connected through an anti-corrosion rubber hose, the exhausting device, the gas collecting device and the drainage device are connected through the anti-corrosion rubber hoses, the drainage device and the metering device are connected through a short pipe, and sealing pads are arranged at ports of gas guiding pipes and valves and ports of the rubber hoses and valves. The device is reasonable in design, easy and convenient to operate and low in investment, can effectively simulate a water-saturated water-containing layer and an anaerobic environment of the underground water to achieve dynamic change monitoring on the gas products N2O, NO and N2 and meets the need of indoor simulation and research on the denitrification mechanism of the underground water.

Description

technical field [0001] The invention belongs to the technical fields of hydrogeology, earth science, environmental science and engineering research, and particularly relates to a gas product collection device of a denitrification simulation system in groundwater. Background technique [0002] Groundwater is the main source of water for industry, agriculture and domestic use in my country, but irrational fertilization of soil, irrational development of groundwater resources and environmental pollution will all lead to an increase in nitrate content in groundwater. In the anaerobic environment of groundwater, nitrate is prone to incomplete denitrification, resulting in the formation of toxic and harmful substances such as nitrite and nitrous oxide. The gaseous products mainly include nitrous oxide, nitrogen and nitric oxide. . In addition to nitrogen (N 2 ) is an inert gas, nitric oxide (NO) can trigger the formation of acid rain, nitrous oxide (N 2 O) is a greenhouse gas s...

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Problems solved by technology

And nitrous oxide and nitric oxide can also destroy the ozone layer and cause certain damage to the earth's organisms

[0003] At present, the research on the denitrification mechanism in groundwater is mostly limited to the transformation of "three nitrogen" substances and the test of denitrifying bacteria. 2 The main reason for the collection simulation device of O, NO and other gas products is that the denitrification reaction process in groundwater is complex, and the gas products generated are too many to be collected centrally, so the composition and content of these gases cannot be known

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