Portable rapid polycyclic aromatic hydrocarbon detection device for soil remediation

Abstract

The invention discloses a portable rapid polycyclic aromatic hydrocarbon detection device for soil remediation. The rapid detection device comprises a soil sampling device, a cooling screening device, a dryness / humidity sensor, at least one Soxhlet extractor, a rapid solvent extraction instrument, a gas chromatography-mass spectroscopy combined instrument and a base, wherein the cooling screening device comprises a screening funnel, a crushing device, a cooling air jet ring pipe and a soil accommodating device, and a screening bamboo rake is arranged at a location, located at the top of a detachable vibratory screen, of the screening funnel; a plurality of Soxhlet extractors are connected onto the base between the cooling screening device and the rapid solvent extraction instrument through a fixed box body; the dryness / humidity sensor, the rapid solvent extraction instrument, the gas chromatography-mass spectroscopy combined instrument and the crushing device are all connected with a control panel. The rapid detection device disclosed by the invention integrates the soil pre-sampling, sampled soil sample automatic treatment and sequential treatment of Soxhlet extraction, rapid extraction and gas chromatography-mass spectroscopy combined instrument treatment for soil polycyclic aromatic hydrocarbon detection, and thus, the detection efficiency of soil polycyclic aromatic hydrocarbons is increased.

Description

technical field [0001] The invention relates to the technical field of detecting polycyclic aromatic hydrocarbons used in soil remediation, in particular to a portable rapid detection device for polycyclic aromatic hydrocarbons in soil remediation. Background technique [0002] Polycyclic aromatic hydrocarbons (PAHs) are a class of persistent organic pollutants with triple effects (carcinogenic, teratogenic and mutagenic), mainly present in the atmosphere, water and soil. Polycyclic aromatic hydrocarbons are produced by the incomplete combustion of organic matter and fossil fuels. There are four main causes of global polycyclic aromatic hydrocarbon pollution today: (1) smoke and dust produced by households, living stoves, and industrial boilers; and industrial processes that use tar, such as coking, petroleum cracking, coal tar refining, asphalt paving, etc.; (3) various man-made open burning and fires; (4) various motor vehicles and internal combustion engine exhaust. [0...

AI Technical Summary

Problems solved by technology

However, in the process of testing soil samples using this method, it is necessary to use a gravity column mud sampler to collect. The samples are naturally air-dried in the laboratory away from light, ground through an 80-mesh sieve, sieved and sieved and placed in a sealed bag for low temperature storage. Sample pretreatment, followed by sample extraction, sample purification, sample concentration, constant volume, recovery experiment, GC / MS analysis, respectively require different test equipment and instruments, the cycle is long, and it is difficult to conduct centralized processing and unified testing Data, a lot of data needs to be processed manually, such as making table comparisons, etc., and the processing cycle is long

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