10 results about "Soil sediment" patented technology

The invention relates to the technical field of carbon dioxide detection, and particularly discloses a device and method for automatically measuring carbon dioxide in soil sediment. The device comprises a first cylinder and a second cylinder, and a first outer limiting groove is formed in the upper end of the outer wall of the first cylinder; an inner limiting groove and a second outer limiting groove are formed in the lower end of the inner wall of the second barrel and the upper end of the outer wall of the second barrel respectively, the second outer limiting groove is the same as the first outer limiting groove so that the second barrel can be assembled, and the first barrel and the second barrel can rotate synchronously; the measuring mechanism, the first barrel and the second barrel are independently arranged, so that the measuring mechanism can move by a specified depth in the first barrel and the second barrel, the measuring depth can be adjusted according to actual requirements, the first barrel and the second barrel are convenient to assemble, the requirement for measuring the depth is further met, fixed-point measurement is facilitated, and the measuring efficiency is improved. Or portable operation is realized.

This invention provides a method for detecting dichloronaphthalene, a persistent organic pollutant in soil sediments. The method includes: collecting soil sediment samples, pre-treating them by freeze-drying, grinding, and sieving to obtain a sample; extracting and purifying the sample using an organic solvent to prepare a test solution; analyzing and detecting the sample using ultra-high performance liquid chromatography-atmospheric pressure chemical ionization mass spectrometry (UPLC-APCI-MS / MS), and calculating the measured value of dichloronaphthalene in the test solution by substituting the obtained peak area and fractionation ratio into a specific formula. This invention fills the gap in my country's technology for detecting dichloronaphthalene-type persistent organic pollutants in soil sediments. This method can effectively eliminate interference from complex matrices, accurately determine trace amounts of six dichloronaphthalene isomers, and has the advantages of high sensitivity, strong anti-interference ability, simple operation, and high detection accuracy.

This invention discloses a measurement system and method suitable for measuring the sand-fixing capacity of vegetation roots in the field, comprising: a sample lifting device, a field module, a measurement module, a sand sample crushing device, and an integrated control system. This invention can simultaneously achieve real-time and high-precision monitoring of data such as sand content and flow velocity during experiments. It quantifies and analyzes the sand-fixing capacity of vegetation roots through parameters such as soil erosion rate and critical initiation velocity of soil sediment, making it particularly suitable for determining the sand-fixing capacity of vegetation roots in coastal areas.

The invention discloses a method for synchronously detecting quaternary ammonium salts with different polarities and structural analogues thereof in high-organic-matter soil / sediment. The method comprises the following steps: performing freeze drying and low-temperature homogeneous grinding on a soil or sediment matrix sample, adding an internal standard substance and an extracting agent, performing vortex mixing, performing ultrasonic extraction, and performing low-temperature and high-speed centrifugation to obtain an extracting solution; heating in a water bath, carrying out nitrogen blowing concentration on an extracting solution until the extracting solution is nearly dry to obtain a concentrated solution, carrying out purification, leaching and impurity removal on the concentrated solution in a methanol-activated solid-phase extraction column, concentrating an eluent, adding a recovery rate indicator, and fixing the volume to obtain a sample to be detected; and detecting the sample to be detected by adopting an ultra-high performance liquid chromatography-tandem triple quadrupole mass spectrometer. According to the method, quaternary ammonium salts with different polarities and structural analogues thereof can be accurately quantified, and compared with a traditional method, the pollutant detection class group is wider, the recovery rate of substances to be detected is high, and the stability is higher.

The invention provides a rapid leaching and dewatering system for the remediation of PFAS-contaminated solid matrix material (e.g., soil, sediment, and / or sludge material) for the removal of PFAS compounds, and other contaminants, therefrom. The system mobilizes contaminants from a solid state (soil / sediment / sludge) to a liquid state resulting in a clean solid material.

The utility model discloses a rapid detection device for metal components in soil sediments, which comprises a base and an index plate movably mounted on the base, and a detection mechanism is arranged on the index plate. The detection mechanism comprises a gear motor, a hollow rotating shaft, a fixed round rod, a guide disc, a plurality of groups of fixed sliding rails, a plurality of fixed clamping seats, a plurality of sliding clamping seats, a plurality of connecting rods, a fixed frame I and a spectrum detector. The soil sediment metal component detection device has the beneficial effects that the detection mechanism is arranged on the index plate, the bearing cylinders are respectively placed between the fixed clamping seat and the sliding clamping seat which are opposite to each other, and when the index plate rotates, the index plate is matched with the guide plate, so that the bearing cylinders can be automatically clamped, continuous detection of soil sediment metal components is realized, and the detection efficiency is improved; the grinding mechanism adopts a plurality of annular grinding rollers to be matched with an annular groove, so that the soil sample can be ground, particles in the soil sample are reduced, and the metal component detection effect is improved.

The utility model discloses a foundation pit drainage device for constructional engineering, which comprises a foundation pit, a water suction pump and a filtering device, and the bottom of the water suction pump is fixedly connected with the left side of the top of the foundation pit. By arranging the air bag, before a user throws the filtering device into water accumulated in a foundation pit, the air bag filled with air is inserted into the mounting ring, then after the filtering device is thrown into the water, the filtering device floats on the upper layer of the water due to the floating force of the air bag in the water, and then the water suction pump is driven from top to bottom; the problems that after the filtering device is directly thrown into water, the filtering device can automatically sink into the bottom of the foundation pit and sink into a soil precipitation layer at the bottom of the foundation pit due to the weight of the filtering device, when a water suction pump pumps out accumulated water in a base body, the filtering device is extremely heavy in filtering work due to the coverage of soil, the water suction efficiency of the water suction pump is reduced, and the water suction efficiency of the water suction pump is reduced are solved. And the drainage working time of the foundation pit is prolonged, and the effect of assisting the filtering device in floating is achieved.

The application provides a magnetic QuEChERS purifier and application thereof in pollutant detection, and the purifier is a MIL-88A derived carbon material which is prepared by high-temperature carbonization of a MIL-88A precursor, has a large specific surface area, rich pores, various surface functional groups and superparamagnetism, is used in the purification step of QuEChERS pretreatment, can efficiently adsorb and remove humic acid and other matrix interference substances in soil / sediment extract, has weak adsorption to target pollutants BPs, and can realize rapid separation in combination with an external magnetic field. The detection method established based on this has the advantages of low matrix effect, high recovery rate, simple and fast operation, and improves the accuracy and reliability of pollutant detection in soil / sediment.

The utility model discloses a soil sediment DNA (deoxyribonucleic acid) extraction device with a temperature regulation and control function, which belongs to the technical field of sediment extraction and comprises an arc-shaped frame, fixed end plates are symmetrically and fixedly mounted at two ends of the arc-shaped frame, a mounting seat is fixedly mounted on one side of one fixed end plate, and the other side of the other fixed end plate is provided with a temperature regulation and control device. And a stirring motor is fixedly mounted in the mounting seat in an embedded manner. According to the soil sediment DNA extraction device with the temperature regulation and control function, a heating plate, a stirring motor, a stirring shaft and stirring blades are arranged, and the stirring motor and the heating plate are started at the same time, so that the stirring motor drives the stirring shaft to rotate in an arc-shaped frame, and the stirring blades stir between the arc-shaped frame and an arc-shaped filter screen; meanwhile, the heating plate is used for heating the soil sediments in the arc-shaped frame, so that the extraction of DNA in the soil sediments is accelerated, and impurities in the soil sediments are prevented from blocking the arc-shaped filter screen to influence the filtration and extraction of the DNA by the arc-shaped filter screen.

The embodiment of the utility model provides a device for simultaneously collecting and detecting hexavalent chromium and trivalent chromium in water / soil / sediment. The device comprises a base, a cover body, a filtering membrane layer, a diffusion layer, a first adsorption layer and a second adsorption layer, wherein the cover body covers the base to form a cavity; the filtering membrane layer, the diffusion layer, the first adsorption layer and the second adsorption layer are arranged in the cavity; a sample introduction window is formed in the central area of the cover body; the filtering membrane layer is arranged close to the sample introduction window; the diffusion layer is in contact connection with the filtering membrane layer; the first adsorption layer is in contact connection with the diffusion layer and is used for adsorbing trivalent chromium ions in the sample to be detected; the second adsorption layer is in contact connection with the first adsorption layer and is used for adsorbing hexavalent chromium ions in the sample to be detected. The first adsorption layer and the second adsorption layer are arranged and used for adsorbing the trivalent chromium ions and the hexavalent chromium ions in the to-be-detected sample respectively, hexavalent chromium and trivalent chromium in water / soil / sediment are collected and detected at the same time, the detection process is simplified, and the detection efficiency is improved.