In-situ detection system for straight section distribution of petroleum hydrocarbon contaminants at contaminated sites

Abstract

The invention discloses an in-situ detection system for straight section distribution of petroleum hydrocarbon contaminants at contaminated sites, and creates an in situ detection system for straightsection distribution of petroleum hydrocarbon contaminants at contaminated sites based on the induced fluorescence technology aiming at urgent needs for the real-time in-situ measurement technology ofstraight section distribution of contaminants, such as treatment and restoration of contaminated sites, and contaminated situation survey for the sites. The invention uses high-energy ultraviolet LEDs of 270nm and 320nm to in-situ excite the petroleum hydrocarbon contaminants in the deep of the contaminated sites to detect fluorescence signals with the wavelengths of 350nm and 450nm, and uses a characteristic fluorescence spectrum of petroleum hydrocarbon to invert the concentration of the contaminants in real time to realize real-time and in-site detection of straight section distribution ofpetroleum hydrocarbon contaminants at sites. The invention has a cylindrical shell and a drill bit that can drill deep into the soil using a soil drill. In the process of using the technology, thereis no need of a reagent, no secondary pollution, and no tedious sample pretreatment and detection process, which can significantly improve the efficiency of the detection of petroleum hydrocarbon pollution at sites.

Description

technical field [0001] The invention belongs to the fields of electromechanical technology, spectrum analysis technology and environmental pollution detection, and in particular relates to an in-situ detection system for the vertical profile distribution of petroleum hydrocarbon pollutants in polluted sites. Background technique [0002] Petroleum hydrocarbon pollutants on site have long been the focus of supervision by the environmental protection department. Currently, on-site sampling-laboratory analysis methods based on infrared spectrophotometry, high performance liquid chromatography, and gas chromatography are mainly used for petroleum hydrocarbon pollutants in industrially polluted sites. Chemical indicators analyze the type and content of pollutants. This type of method is widely adopted by countries all over the world. In the "National Soil Pollution Survey Sample Analysis and Determination Technical Regulations" compiled by my country's State Environmental Protect...

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Problems solved by technology

However, such laboratory methods usually use complex extraction methods such as ultrasound and vibration, which require the use of certain toxic organic solvents. The detection time is long, the steps are cumbersome, and it is easy to cause secondary pollution. On-site detection of petroleum hydrocarbons cannot be realized. Its timeliness cannot meet the needs of site remediation for real-time in-situ detection technology of vertical distribution of petroleum hydrocarbon pollution

Existing technologies still require a complex sampling process for deep soil, which requires drilling rigs to take samples from soil layers at different depths and then measure them. It is impossible to realize real-time and in-situ detection of the vertical profile distribution of petroleum hydrocarbon pollutants on site

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