23 results about "Ocean sediment" patented technology

The invention provides a biochar repairing agent for marine sediments and a preparation method of the biochar repairing agent, and belongs to the technical field of repairing agents. The preparation method comprises the following steps: carbonizing straws, modifying by phosphoric acid and concentrated nitric acid, depositing ferroferric oxide-titanium dioxide, loading UiO-66-(COOH) 2 on the surface, coupling cyclodextrin-MOF and chitosan, crosslinking, performing magnet separation, washing and drying to obtain the biochar repairing agent for the marine sediments. The biochar repairing agent for the marine sediments prepared by the invention has a relatively large specific surface area and a plurality of coordination groups, can better fix heavy metal ions in the marine sediments, also has a photocatalytic degradation effect on organic pollutants, and is good in mechanical strength, easy to store and transport, safe, environment-friendly and easy to separate; wide application prospects are realized.

The invention discloses a marine fungus fusarium keratinoides and application thereof. The fusarium keratinoides capable of efficiently producing the perindoprine is screened from marine sediments, and the content of the produced perindoprine can reach 561.7 mu g / L after the fusarium keratinoides is fermented in a GPY liquid culture medium, so that possibility and a foundation are provided for breeding strains suitable for industrial large-scale production of the perindoprine in the future; mass spectrum, hydrogen spectrum and carbon spectrum data of the separated perindoprine are completely consistent with perindoprine data reported in literatures.

The invention discloses a marine sediment heavy metal extraction device which comprises an extraction tank, the side end of the upper portion of the extraction tank is connected with a feeding pipe, a feeding hopper is arranged above the other side of the feeding pipe, the feeding pipe and the feeding hopper are connected through a support, and a gap is kept between an outlet and an inlet of the feeding pipe and the feeding hopper; a screening mechanism is arranged at the top of the extraction pipe and comprises a rotating shaft and a plurality of screening assemblies distributed on the rotating shaft, and when one screening assembly rotates to the gap, the feeding hopper, the screening assemblies and the feeding pipe form a closed and coherent channel; according to the device, high efficiency, automation and cleanness of extraction of the heavy metals in the marine sediments are realized through innovative dynamic sealing sieving, spiral stirring-filter pressing cooperation, intelligent temperature control separation and a modular absorption system.

Method for manufacturing composite cement, wherein a supplementary cementitious material is obtained from a marine sediment deposit fed by erosion of volcanic rock to form sedimented pozzolan by dredging the sediment deposit, dewatering the dredged sedimented pozzolan to a water content of below 20 wt.-% with respect to the total weight of sedimented pozzolan and water, washing the sedimented pozzolan with fresh water to a chloride content below 0.2 wt.-% with respect to the total solids, and drying to provide the supplementary cementitious material, and mixing the supplementary cementitious material with a hydraulic cement to provide the composite cement, as well as use of the obtained supplementary cementitious material for making composite cements and supplementary cementitious material and composite cement obtainable by the method or use.

The application discloses a modified anode for a marine sediment microbial fuel cell and a preparation method of the modified anode and the marine sediment microbial fuel cell, and the preparation method comprises the following steps: S1, obtaining a primary anode; S2, nitrogen is introduced into a first PBS buffer solution to perform nitrogen exposure treatment, and dopamine hydrochloride is added to obtain a first electrolyte; S3, the primary anode is immersed into the first electrolyte, and electro-deposition is performed on the primary anode by a first cyclic voltammetry scanning method to obtain a PDA modified anode; S4, Fe3O4 powder is added into a second PBS buffer solution to obtain a second electrolyte; and S5, the PDA modified anode is immersed into the second electrolyte, and electro-deposition is performed on the PDA modified anode by a second cyclic voltammetry scanning method to obtain a PDA / Fe3O4 modified anode. The PDA / Fe3O4 composite is used to modify the anode, the electrochemical performance of the anode is improved, and a proper amount of amino acid is added into the sediment, so that the organic matter conversion and electron transmission efficiency of the microbial fuel cell are improved, and the electricity generation performance of the microbial fuel cell is improved.

The invention relates to the technical field of detection, and particularly discloses a method for detecting 2-aminothiazole in marine sediments in a sea area near an offshore wind field, which comprises the following steps: extracting a sample by using a mixed solution, then deriving by using hexyl chloroformate, converting a target compound 2-aminothiazole into N-(thiazole-2-yl) carbamic acid n-hexyl ester, and detecting the 2-aminothiazole in the marine sediments in the sea area near the offshore wind field by using the N-(thiazole-2-yl) carbamic acid n-hexyl ester. And enriching and purifying the obtained derivative by using a solid-phase extraction small column, and detecting by using a liquid chromatography-mass spectrometry system. The method provided by the invention can be used for efficiently, quickly and accurately analyzing and detecting, and is suitable for detecting 2-aminothiazole in marine sediments.

The invention discloses marine sediment detection sampling equipment and a method thereof, and relates to the technical field of sediment detection sampling. The marine sediment detecting and sampling equipment comprises a device box, a sampling pipe is arranged below the device box, the marine sediment detecting and sampling equipment further comprises a supporting column rotationally installed in the device box, a driving part for driving the supporting column to rotate in a reciprocating mode is arranged in the device box, and an installation hole is formed in the bottom of the supporting column. A connecting column is longitudinally mounted in the mounting hole in a sliding manner; wherein the sampling pipe is installed at the bottom of the connecting column, and when the supporting column rotates in a reciprocating mode, the connecting column ascends and descends in the installing hole in a reciprocating mode; the sampling pipe can effectively destroy the structure of the sediment, reduce the frictional resistance of the pipe wall and improve the sampling efficiency of the ocean sediment.

The invention relates to a wet-type rotary precise sample separation device and method for marine sediment particle size analysis. The wet-type rotary precise sample separation device comprises an anti-sedimentation sample injection unit, a rotary sample separation unit and a driving unit, the anti-sedimentation sample introduction unit comprises a sample introduction funnel and a dynamic homogenizer arranged in the sample introduction funnel, and a liquid outlet is formed in the bottom of the sample introduction funnel; the rotary sample separation unit is positioned below a liquid outlet of the anti-sedimentation sample injection unit and comprises a distribution disc capable of rotating around a vertical axis, and at least two stations for accommodating receiving containers are arranged on the distribution disc along the circumferential direction; and the driving unit is in transmission connection with the distribution disc and is used for driving the distribution disc to rotate. The device is compact in structure, easy and convenient to operate and high in sample separation precision, the influence of gravity sedimentation on sampling uniformity can be overcome in a mechanical mode, and it is ensured that each trace sample separated from original suspension liquid is highly consistent with an original sample in particle size composition, so that the requirement for high-precision laser particle size analysis is met.

The application discloses a natural gas hydrate reservoir formation age analysis method, device and system, relates to the technical field of marine natural gas hydrate exploration, and comprises the following steps: collecting marine sediment samples in a natural gas hydrate drilling core column; performing a photoelectric age test on the marine sediment samples; establishing an age-depth model of the natural gas hydrate samples according to the obtained photoelectric age and sediment depth of the marine sediment samples; calculating the sedimentation time of the natural gas hydrate reservoir according to the age-depth model of the natural gas hydrate drilling, and further determining the formation age of the natural gas hydrate. The method can accurately determine the formation age of the natural gas hydrate, avoids the interference caused by the uncertainty of the natural gas hydrate reservoir forming time, and lays a geological exploration foundation for further revealing the natural gas hydrate reservoir forming mechanism.

The embodiment of the invention provides a marine sediment sample data distribution method and related equipment, and belongs to the technical field of data analysis. The method comprises the following steps: acquiring a target marine sediment sample data set; the target marine sediment sample data set comprises a plurality of target marine sediment sample data from different data sources; according to the sequence of the multiple pieces of target ocean sediment sample data in the target ocean sediment sample data set, the multiple pieces of target ocean sediment sample data are issued to the second electronic devices respectively; obtaining an initial detection result corresponding to the target marine sediment sample data sent by each second electronic device; and performing mass comparison on the initial detection result corresponding to the target marine sediment sample data to obtain a target detection result. By implementing the embodiment of the invention, the accuracy of the obtained target detection result can be ensured, so that the detection efficiency and accuracy of treating a large number of marine sediment samples are improved.

The utility model discloses a marine sediment in-situ multi-parameter measuring device which comprises an insulating shell and a main control module installed in the shell, a conductivity measuring unit is embedded in the outer side of the shell, a heat conductivity measuring unit is further arranged in the shell, and the conductivity measuring unit and the heat conductivity measuring unit are respectively and electrically connected with the main control module. The device has the beneficial effects that the conductivity measuring unit is embedded in the outer side of the insulating shell, the heat conductivity measuring unit is arranged in the shell, the conductivity measuring unit and the heat conductivity measuring unit are used for respectively detecting the conductivity and the heat conductivity of the ocean sediment, and the acquired data are sent to the main control module for real-time processing; and the synchronous monitoring capability of the device is enhanced.

The application discloses a marine sediment classification space distribution visualization method, equipment, medium and product, and the method comprises the following steps: collecting sediment samples of each space sampling point in a target sea area, and obtaining sediment grain composition data; calculating the sediment energy intensity of each point, combining a standard sediment classification threshold set, and determining the corresponding optimized sediment classification threshold set of each point; using the optimized threshold set and the grain composition data to determine the sediment bottom type of each sampling point; constructing a space triangulation network based on all the sampling points, combining the grain data, the bottom type and the standard threshold set, and interpolating the classification boundary points on the triangulation network; dividing the sea area into polygonal regions corresponding to the bottom types according to the boundary points, performing automatic color filling and type labeling, and finally generating a marine sediment space distribution map. The technical scheme of the embodiment of the application can realize comprehensive and accurate classification of marine sediments and complete the visualization mapping of the space distribution of the marine sediments.

This invention relates to the field of detection, specifically to an in-situ method for determining the sulfate reduction rate of marine sediments. The in-situ determination method provided by this invention involves injecting a certain amount of... 34 S stable isotope labeled SO4 2‑ (in 34 S abundance was much higher than that of SO4 under natural conditions. 2‑ middle 34 The abundance of S was 4.2%, when SO4 2‑ When reduced, SO4 is marked 2‑ Unlabeled SO4 2‑ Converted proportionally to S 2‑ The S generated at this time 2‑ middle 34 The abundance of S will increase. Determination of labeled SO4 2‑ Before (control CK) and marked SO4 2‑ - S in the sediment after a period of time (ΔT) 2‑ of 34 By measuring the sulfate abundance difference and other relevant parameters, the sulfate reduction rate can be calculated. This invention enables in-situ measurement of sulfate reduction rates in marine sediments, yielding results that conform to objective laws and are highly accurate. The measurement process is simple, safe, and stable.

The invention discloses a marine sediment heavy metal determination method based on rapid digestion. The marine sediment heavy metal determination method comprises the following steps: S1, digestion; the method comprises the following steps: weighing a standard sample, putting the standard sample into a polypropylene volumetric tube, wetting the sample, adding mixed acid, and digesting in a graphite digestion instrument; the exterior of the polypropylene volumetric tube is sealed; s2, detecting; cooling and quantifying after digestion is completed, taking supernate, diluting and detecting; preparing a calibration solution by adopting the digestion blank solution so as to eliminate a matrix effect caused by acid for digestion; 103Rh, 115In and 209Bi are selected as internal standard elements, and the on-line internal standard concentration is 50 [mu] g / L. According to the method, the polypropylene volumetric tube and the graphite digestion instrument are adopted for digestion, the digestion time is obviously shortened, the digestion temperature is reduced, the pretreatment efficiency is improved, and meanwhile, by optimizing the calibration solution preparation method and the conditions such as internal standard elements and internal standard concentration, it is ensured that the accuracy and precision of the method meet the test requirements.

The invention relates to the technical field of mercury isotope analysis, in particular to a catalytic pyrolysis method for mercury isotope analysis of a marine sediment sample. According to the method, pyrolysis is carried out under the action of the composite catalyst, efficient in-situ removal of complex matrixes can be realized in cooperation with pyrolysis conditions, and then the recovery rate of mercury and the accuracy of isotope detection results are improved. The method provided by the invention solves the problems of low mercury recovery rate, instability, serious matrix interference and the like of a marine sediment sample with a complex matrix. According to the method, the mercury recovery rate, the matrix removal efficiency and the accuracy and precision of mercury concentration and isotope analysis of the method are comprehensively verified by utilizing various marine sediment standard substances and actual environmental samples, and the result shows that the method has excellent reliability and accuracy in the aspect of mercury concentration and isotope analysis. The catalytic pyrolysis method provided by the invention can provide key technical support for accurately analyzing mercury records in marine sediments.

Method for manufacturing composite cement, wherein a supplementary cementitious material is obtained from a marine sediment deposit fed by erosion of volcanic rock to form sedimented pozzolan by dredging the sediment deposit, dewatering the dredged sedimented pozzolan to a water content of below 20 wt.-% with respect to the total weight of sedimented pozzolan and water, washing the sedimented pozzolan with fresh water to a chloride content below 0.2 wt.-% with respect to the total solids, and drying to provide the supplementary cementitious material, and mixing the supplementary cementitious material with a hydraulic cement to provide the composite cement, as well as use of the obtained supplementary cementitious material for making composite cements and supplementary cementitious material and composite cement obtainable by the method or use.

This invention provides a method and kit for extracting microbial DNA from marine sediments. The extraction method includes: a) washing the marine sediments with a washing buffer to obtain a washed sample; wherein the washing buffer includes spermidine and sodium pyrophosphate; b) lysing the microbial cells in the washed sample to obtain a lysed sample; c) recovering, screening, and purifying the DNA from the lysed sample to obtain microbial DNA. This method solves the problem of poor DNA extraction efficiency in existing technologies and is applicable to the field of DNA extraction.

The application relates to the technical field of marine sediments, and discloses a device and method for filtering and purifying marine sediment samples, which comprise a box, a filtering and purifying mechanism is arranged in the box, the filtering and purifying mechanism comprises a filtering and purifying cavity arranged in the box, a first movable sliding groove is arranged on an end wall of the filtering and purifying cavity, a first movable lead screw is rotationally connected between end walls of the first movable sliding groove, the first movable lead screw is power-connected with a first movable motor, the sample can be detected, the positions of stones or plastics in the sample can be detected and determined, the stones and plastics in the sample can be conveniently picked out, the purity of the sample is improved, drilling can be realized on the sample when the sample is taken out, the size of the drilling can be adjusted, the size of the drilling is adjusted according to the size of the stones or plastics, and the stones and plastics of different sizes can be conveniently picked out.

The invention belongs to the technical field of marine natural gas hydrate resource exploration and development engineering, and particularly provides a hydrate saturation fine characterization device and method based on a time domain reflection method.The device comprises a reaction kettle, a dielectric property testing module and a data collecting and processing module; the dielectric property testing module comprises a time domain reflection tester and a time domain reflection sensor assembly which are connected, the time domain reflection sensor assembly vertically penetrates through the bottom of the reaction kettle and is inserted into the reaction kettle, a marine sediment sample is arranged in the reaction kettle, and the marine sediment sample is virtually divided into a plurality of layers in the length direction of the reaction kettle; the time-domain reflection sensor assembly is composed of one or more groups of time-domain reflection sensors, each group of time-domain reflection sensors is composed of time-domain reflection sensors with the number equal to that of the layers, the lengths of all the groups of time-domain reflection sensors are different, and the top ends of all the groups of time-domain reflection sensors are located at different layers, so that the saturation degrees of hydrates at different positions in the sediment sample can be obtained; the fine characterization of the saturation of the hydrate in the sediment sample can be realized.

This invention belongs to the field of biomedicine and provides a fungus derived from marine sediments and its applications. The fungus is a fungus of the genus Aspergillus. Aspergillus tanneir UJNMF0417, with accession number CGMCC No. 41647. The fermentation product of this *Aspergillus* fungus, after extraction with an organic solvent, yielded a crude extract with good neuroprotective activity. The indolepiperazine compounds provided by this invention can be... Aspergillus tanneir UJNMF0417 was obtained through fermentation extraction and isolation. It can improve 6-OHDA-induced PC-12 cell damage and has potential applications in the preparation of drugs for the prevention and treatment of PD.

This invention discloses a method, device, medium, and product for visualizing the spatial distribution of marine sediments. The method includes: collecting sediment samples from various spatial sampling points in a target sea area to obtain sediment grain size composition data; calculating the sediment energy intensity at each point and determining an optimized sediment classification threshold set for each point by combining it with a standard sediment classification threshold set; using this optimized threshold set and grain size composition data to determine the sediment substrate type at each sampling point; constructing a spatial triangular network based on all sampling points, and interpolating classification boundary points on the triangular network by combining its grain size data, substrate type, and standard threshold set; dividing the sea area into polygonal regions corresponding to each substrate type based on the boundary points, performing automated color filling and type labeling, and finally generating a spatial distribution map of marine sediments. The technical solution of this invention can achieve comprehensive and accurate classification of marine sediments and complete the visualization mapping of their spatial distribution.

The application discloses a novel undisturbed ocean sediment sampling cutter head, which comprises an outer cylinder, an inner cylinder, a turnover lever assembly and a petal assembly. When the sampler moves downward, the petal is clamped by the turnover lever by using the water flow and the upward force of the sediment on the turnover lever, so that the petal is kept in an open state during the whole sampling process. When the sampler starts to be pulled upward after the sampling is completed, the petal is pried by using the downward force of the sediment on the turnover lever, so that the petal is closed. The cutter head utilizes the natural resistance generated by the water flow and the sediment, and through the linkage of the turnover lever and the petal, the petal is kept in an open state and closely contacts the inner wall during the whole sampling process, so that the problem that the elastic petal disturbs the sediment sampling and generates resistance can be effectively solved. When the cutter is pulled, the petal can be closed in time by means of the sediment resistance and the action of the turnover lever, so that the sediment sample leakage is effectively blocked, the sampling efficiency is improved, and the disturbance of the petal to the sediment is reduced.

The invention discloses a method, a device, equipment and a medium for correcting pore size distribution of marine sediments based on a nuclear magnetic resonance technology. The method comprises the following steps: measuring a nuclear magnetic signal attenuation curve M0 (t) of the marine sediments by utilizing a nuclear magnetic instrument; measuring a pore size distribution curve of the marine sediment by using a mercury intrusion method; a nuclear magnetic signal attenuation curve of the simulated marine sediment is obtained and normalized, and a normalized nuclear magnetic signal attenuation curve of the simulated marine sediment is obtained; calculating a difference value M (t) between the nuclear magnetic signal attenuation curve of the normalized simulated marine sediment and the nuclear magnetic signal attenuation curve M0 (t); performing inversion calculation on the M (t) to obtain a pore size distribution curve of mercury intrusion method missed measurement; and adding the pore size distribution curve missed by the mercury intrusion method and the pore size distribution curve of the marine sediments to obtain a complete pore size distribution curve of the marine sediments.