13 results about "Interstitial water" patented technology

The application discloses an electro-catalytic oxidation system and method and an ecological joint treatment method for in-situ remediation of water body sediments, which utilizes an intelligent pulse power controller to perform intermittent pulse electro-catalytic oxidation on the bottom mud at the water bottom, generates hydroxyl radicals through in-situ catalysis of an anode to degrade organic pollutants of the bottom mud, generates micro-bubbles in the interstices of the bottom mud through the electrolysis of water to improve the oxidation-reduction potential, and further reserves time for the soluble pollutants in the interstitial water of the bottom mud to sufficiently diffuse to the surface of the electrode, so as to avoid energy waste caused by concentration polarization. Through reverse power supply, the polarity of the anode and the cathode is instantaneously reversed, trace amounts of acidic substances and gas generated through in-situ electrolysis are utilized to strip off the calcium and magnesium scale attached to the surface of the cathode, and manual cleaning and maintenance under water are realized. In combination with the planting of submerged plants on the treated bottom mud, ecological joint treatment is realized, the root system of the submerged plants is utilized to perform long-term ecological fixation and water purification on the treated sediments.

The invention discloses a multi-layer profile organic matter in-situ extraction system and method based on self-sedimentation, and belongs to the technical field of multi-layer profile in-situ sampling devices for wetland sediment interstitial water and gaseous organic matter. The system comprises a sampling head, a sample tube adapter, a filter membrane, an injector, a vacuum bottle connected with a capillary Teflon tube, a water inlet with a foam floating ring, a star-cone-shaped sampling head cap, a perforated wire mesh and the like, the method comprises the following steps: after preparing the device, driving the sampling head to sink to a target position through the sample tube adapter, rotating the sampling head to separate the star-cone-shaped sampling head cap so as to start sampling, enabling interstitial water to enter the sampling head through the perforated wire mesh, and switching the three-way valve to respectively collect water-phase and gas-phase samples by using the water-phase sampling bottle and the vacuum bottle connected with the capillary Teflon tube. After sampling, the anti-drag connecting rope pulls the cap to turn over to drive the sampling head to move upwards. The system and the method are mainly used for in-situ extraction of organic matters on a multilayer profile of a wetland ecosystem, and can synchronously collect water-phase and gas-state samples.

This invention relates to a method, system, and application for remediating black and odorous sediment. The remediation method includes the following steps: homogenizing the black and odorous sediment; detecting the ferrous content of the sediment and calculating the amount of persulfate to be added based on the molar ratio; using the ferrous-rich sediment as an activator, adding persulfate and stirring to mix the persulfate and sediment for reaction; adjusting the stirring time; using ferrous activator to generate sulfate free radicals from the persulfate, which oxidize the black and odorous substances, causing heavy metals to leach out; centrifuging and filtering the mixture, collecting the interstitial water containing heavy metals, and washing the mixture to obtain harmless sediment. The remediation method of this invention can achieve Fe... within 5 minutes. 2+ With a removal rate of ≥79% and an AVS removal rate of ≥89% within 2 minutes, the leaching rates of Zn, Mn, Ni, and Pb in black and odorous sediment can reach 41%, 32%, 19%, and 17%, respectively, which belongs to the field of environmental engineering technology.

The invention provides a rock stratum muddy replacing device which is characterized in that a replacing pipe is inserted into a drill hole, the outer diameter of the replacing pipe is smaller than the diameter of the drill hole, and a plugging piece is used for plugging a gap between the replacing pipe and the drill hole; the water tank is filled with flushing fluid; the output end of the water pump is connected with a water supply pipe, and the water supply pipe extends out of the water tank; the adjusting frame is arranged on one side of the water tank, a connecting pipe is arranged on the adjusting frame, the adjusting frame is used for adjusting the position of the connecting pipe, one end of the connecting pipe is connected with the replacement pipe, and the other end of the connecting pipe is connected with the water supply pipe. The replacement pipe is inserted into the drill hole, and the gap between the replacement pipe and the drill hole is blocked through the blocking piece, so that the flushing fluid can be prevented from leaking from the gap between the replacement pipe and the drill hole in the conveying process, it is guaranteed that the flushing fluid can completely act on an argillaceous layer in a rock stratum, and the utilization efficiency of the flushing fluid is improved; meanwhile, the leaked flushing fluid is prevented from polluting the construction environment or influencing the stability of surrounding rock stratums.

The invention discloses a greenhouse gas emission indoor culture device for simulating decomposition of lake litters, and belongs to the technical field of environmental science and ecological experiment devices. Comprising a culture tank, a litter fixing device, a closed air chamber, a three-phase sampling unit, a pressure balance module and a temperature control module, a sediment-water covering-air chamber three-layer structure is formed in the culture tank, and a lake water-mud interface and a water-air interface are accurately simulated; the litter fixing device is fixed on a water covering layer or a sediment layer and is adaptive to different types of litters; the three-phase sampling unit synchronously collects water-dissolved greenhouse gas in a gas chamber, a water body and a sediment gap; the pressure balance module ensures pressure stability of the closed space. The device solves the problems that an existing device cannot accurately simulate the lake microenvironment, gas collection is not comprehensive, and environment control is insufficient, has the advantages of being convenient to operate, high in collection precision and suitable for indoor batch experiments, and can be widely applied to lake litter decomposition and greenhouse gas emission research.

The application discloses a method for predicting the characteristics of a slurry membrane closed gas and stratum deformation of a shield with pressure opening, and belongs to the technical field of tunnel engineering. Based on the Biot poroelasticity mechanics framework, a fluid-solid coupling simulation model of a slurry membrane-soil composite system is established, the dispersing effect of high-pressure gas on interstitial water is characterized by a water holding capacity function, and the whole process of gas breaking through the slurry membrane and seeping to the ground surface and the stratum deformation response are reproduced. By preparing slurry and collecting stratum samples, the porosity, density, permeability coefficient, elastic modulus, Poisson's ratio and soil water characteristic curve parameters are obtained through permeation, triaxial, water holding capacity and other tests, and the test parameters are assigned to a geometric model established according to the engineering burial depth, shield diameter and underground water level; under the boundary conditions of setting the initial displacement of self-weight, the pore water pressure distribution of the underground water level and the transition of the excavation face from slurry support to gas pressure support, numerical calculation is carried out under different gas pressures, slurry membrane thicknesses, burial depths and underground water levels, and the high-pressure gas seepage path and stratum deformation are predicted. The technology can reveal the failure mechanism of the slurry membrane closed gas performance and the development law of the stratum deformation, and provides a theoretical basis and technical support for the support gas pressure design of the shield with pressure opening.

The utility model relates to the technical field of environment and ecology research, concretely relates to a interstitial water layered sampling device. The utility model discloses reactor and the fixedly through a plurality of sampling tubes in its one side. Sampling tube divides into three groups of upper layer, middle layer, lower layer, and is spaced apart from top to bottom, and the pipe body has the water inlet hole, and the pipe wall that stretches into the reactor is wrapped silk screen and filters the sediment particle, and the end connects the rubber tube and is bent upwards and hangs in the reactor top. The reactor is filled with sediment and overlying water, and the inner wall is pasted with tin foil paper and is shaded, and the top is provided with fixed iron wire series connection fixed rubber tube. The device realizes the non -power layered sampling by communicating vessel principle, can accurate collection the interstitial water of different depth from the reactor bottom, and low in cost, easy maintenance is applicable to the benthic animal disturbance research, nutrient salt circulation monitoring and pollutant vertical migration analysis of fresh water lake, river etc. scene, has layered precision high, easy operation, environmental adaptability strong and other advantages.

This invention relates to a method for determining particle stress during the collapse process of an underwater two-component particle mass, including the calculation of the collision pressure, friction pressure, collision shear stress, and friction shear stress of the i-th particle component, in order to obtain the i-th particle component. i The pressure and shear stress of each particle component are used to determine the collision and friction pressures during the collapse of the two-component particles. This invention considers the dilatation and shear contraction effects and the influence of interstitial water, reflecting the different levels of resistance from water during the movement of different particle components. By considering the anisotropy between and within each component, as well as the influence of interstitial water, the prediction of the underwater collapse morphology of two-component particles is more accurate. By integrating inter-component particle interactions, anisotropic collisions, and dilatation and shear contraction friction, the invention reflects the particle separation phenomenon of small particles sinking and large particles floating during particle collapse.

The invention belongs to the technical field of environmental engineering, and discloses an experimental device and an experimental method for simulating nitrogen and phosphorus release of water body sediments. The device comprises an experiment main body unit, an environment simulation unit, a water quality regulation and control unit, a mobile monitoring unit, an automatic sampling module and an intelligent regulation and control module. Wherein the experiment main body unit is provided with a water tank for accommodating sediments and a water body; the environment simulation unit is integrated with a water flow disturbance assembly, an aeration assembly, an illumination assembly and a heating assembly; the water quality regulation and control unit regulates water chemical parameters; the mobile monitoring unit performs spatial dynamic detection on the water body; the automatic sampling module automatically collects overlying water and interstitial water of the sediment according to a specified time interval; the intelligent regulation and control module coordinates operation of all the units, and multi-scene simulation and closed-loop regulation and control are achieved. Accurate simulation, real-time monitoring and intelligent regulation and control of the migration and release process of the sediment-water interface substance under different environmental conditions can be achieved, and the accuracy and comprehensiveness of experimental data are remarkably improved.

The present application relates to the technical field of sediment interstitial water sampling in environmental monitoring, and discloses a launching device, a sampling device and a sediment interstitial water sampling method. The launching device is used for launching a sediment interstitial water sampler and comprises a shell, a cavity for accommodating the sampler arranged in the shell, and a transmission assembly. One end of the transmission assembly is used for receiving a power load, and the other end of the transmission assembly is used for transmitting the power load to the sampler in the cavity, so that a sampling end of the sampler can pass out of the shell. The sampling device is used for sampling sediment interstitial water and comprises the aforementioned launching device and the sampler arranged in the cavity. The sediment interstitial water sampling method is applied to the sampling device to perform sampling. The present application has the technical effects of collecting and monitoring the sediment interstitial water and overlying water in the monitoring area in a state of substantially no disturbance and improving the accuracy of in-situ acquisition of different substances and parameters of SWI.

This invention relates to the field of water pollution control technology and provides a method for analyzing the source-sink effect of total phosphorus in lake sediments. The invention calculates the total phosphorus inflow and outflow flux by acquiring hydrological observation data at the inlet and water quality monitoring data at the outlet; it acquires satellite remote sensing data and lake hydrological data to classify the lake sediments into multiple types; it tests the total phosphorus content and the content of multiple phosphorus forms; it conducts sediment phosphorus adsorption and release experiments to evaluate adsorption and release characteristics, tests the phosphorus content in interstitial water of sediments, and calculates the diffusion flux of sediment phosphorus; it establishes a release model of lake sediment phosphorus, compares and verifies it with the total phosphorus inflow and outflow fluxes, and analyzes the source-sink effect, providing strategies and roadmaps for controlling total phosphorus in lakes. This invention enables sampling, monitoring, analysis, and adsorption and release experiments on various types of sediments to explore sediment pollution and release risks and the contribution rate of total phosphorus pollution from various sources, providing a scientific basis for the precise treatment of endogenous total phosphorus pollution in lakes.

This invention discloses a method for controlling tungsten release from sediments using lanthanum-modified red clay, belonging to the field of sediment pollution control and water remediation technology. The invention uses natural red clay as raw material, reacting it with lanthanum chloride hexahydrate at room temperature to prepare lanthanum-modified red clay. This material is then uniformly applied to the surface of tungsten-contaminated sediments. Through the formation of stable lanthanum tungstate precipitates and inner spherical complexes between lanthanum ions and tungstate ions, the adsorption capacity and fixation efficiency for tungsten are significantly improved, effectively inhibiting the release of tungsten from sediments into overlying water. This invention features a simple preparation process, readily available raw materials, low cost, and environmental friendliness. The resulting stable product remains stable under reducing conditions, providing a long-lasting remediation effect. It can achieve a 56.1% fixation rate of dissolved tungsten in interstitial water of sediments, significantly reducing tungsten release flux and the content of unstable tungsten. This method is suitable for in-situ control and ecological remediation of tungsten-contaminated sediments in lakes, rivers, reservoirs, and other water bodies.

This invention belongs to the field of environmental monitoring technology, specifically disclosing a device and method for continuous monitoring of dynamic changes and key environmental indicators of deep-water sediments in riparian zones. The device includes a host computer control unit, an underwater auxiliary unit, and a data acquisition unit. The underwater auxiliary unit and the data acquisition unit are located underwater. The underwater auxiliary unit is signal-connected to the host computer control unit to receive control commands from the host computer control unit. The underwater auxiliary unit is also signal-connected to the data acquisition unit to control the operation of the data acquisition unit and receive data transmitted by the data acquisition unit according to the control commands from the underwater auxiliary unit and the host computer control unit. The host computer control unit receives and displays the data transmitted by the data acquisition unit. This invention enables high-precision, high-frequency monitoring and batch data acquisition of key environmental indicators and interstitial water in deep-water sediments.