Abstract: Provided is a method of measuring dissolved methane in seawater, including: a) injecting a sample into a vacuum container containing a cadmium chloride solution injected thereinto and refrigerating the vacuum container; b) shaking the vacuum container, and achieving temperature equilibrium with an ambient temperature; c) separating the dissolved methane from residue by passing the sample in the vacuum container through a methane separator; and d) analyzing the separated dissolved methane by a mass spectrometer. According to the method of measuring dissolved methane in seawater of the present invention, a recovery rate of dissolved methane may be maximally increased to improve an analysis rate accordingly, and an analysis of dissolved methane may be conducted even with a small amount of sample, and in addition to the measurement of the dissolved methane, a sulfur isotope analysis may be simultaneously conducted by using a sample from which the dissolved methane is extracted.

Abstract: A method of collecting samples that are not polluted at the outside of a borehole at a predetermined depth by using a multi-packer and an apparatus therefore. Contaminated water in the borehole between first and second packers of the multi-packer is selectively discharged into a contaminated water discharging vessel installed on a lower end of a sample collecting container by opening or closing an electronic switching valve in the contaminated water discharging vessel.

Abstract: An automatic sheet grinding apparatus includes a stationary stage positioned at a lower portion of the automatic sheet grinding apparatus, a sheet holder positioned on the stationary stage to grip the sheet, and a grinding head part having a chuck assembly fixed to the grinding head part through a spindle, spaced apart from the sheet holder, positioned on the stationary stage, and having a grinding disc attached to the chuck assembly to grind the sheet provided in the sheet holder. The grinding head part includes a thickness measuring unit to measure a thickness of the sheet, and a hardness measuring unit to measure hardness of the sheet. The automatic sheet grinding apparatus further includes rails positioned on the stationary stage and extending in parallel to each other. In this case, the sheet holder is securely and movably provided on the rails positioned on the stationary stage to grip the sheet.

Abstract: Provided are an apparatus and method for solution mining using cycling process in which a solvent is injected into underground useful ores to dissolve the useful ores and then collected again to obtain the useful ores. The cycling solution mining method includes a boring process for excavating the underground up to an ore deposit, a fracturing process to generate cracks in the ore deposit, an injection process for inserting a mining apparatus including an insertion rod having a pipe shape up to a lower portion of the well to inject a solvent that dissolves the useful ores into the ore deposit through the insertion rod, wherein a rotation force is applied to the solvent discharged from the insertion rod to increase a diffusion force of the solvent, and a production process for collecting the solvent, in which the useful ores are dissolved, again.

Abstract: An apparatus and method for 3D seismic exploration for use in a small ship. The apparatus includes a seismic source towed by the small ship from a rear side thereof, a pair of support rods connected to the rear side and horizontally arranged in two rows behind the seismic source in the direction extending from a sailing direction of the ship, and a plurality of streamers arranged between the support rods in the sailing direction of the ship.

Abstract: A compass includes a case, a first support shaft, a second support shaft, and a needle. The case includes an upper plate, a lower plate, and a side wall that connects edge portions of the upper plate and the lower plate. The first support shaft is coupled to the lower plate and protrudes toward the upper plate, and the second support shaft is coupled to the upper plate and protrudes toward the lower plate. The needle includes a support unit, a first indicator unit, and a second indicator unit. The support unit is disposed between the first support shaft and the second support shaft, and includes a first support groove that is formed close to the first support shaft and a second support groove that is formed close to the second support shaft. The first indicator unit is coupled to one side of the support unit, and the second indicator unit is coupled to the support unit to face the first indicator unit with the support unit therebetween.

Abstract: A clinometer apparatus includes a first measurement member, a second measurement member, and a coupling member. The first measurement member includes a first plate on which first angle indices are formed, and a first coupling unit that has a circumferential surface on which second angle indices are carved. The second measurement member includes a second plate, a second coupling unit that is coupled to the first coupling unit due to the coupling member, and a compass that is coupled to the second plate. The coupling member couples the first coupling unit and the second coupling unit so that the second measurement member rotates relative to the first measurement member about a rotational axis of the first coupling unit.

Abstract: An apparatus for collecting surface seabed sediment. A cylindrical cover part is connected to a trigger, has an open bottom end, and has a position maintaining part disposed therein. A holder part is coupled with the position maintaining part, and has a longitudinal hollow space defined therein. A pipe-shaped sediment collecting part is detachably coupled at one end with a bottom end of the cover part, and has a receiving space defined therein, such that seabed sediment is accommodated within the receiving space. A head part is disposed at one end thereof on the other end of the sediment collecting part, has a hollow space defined therein, and has an insert blade on a periphery. A catcher part is disposed on an inner circumference of the head part, and allows seabed sediment to enter the receiving space of the sediment collecting part while preventing the collected sediment from being lost.

Abstract: Disclosed is an apparatus for monitoring hot waste water discharged from a power plant by using an airborne multispectral scanner system. The apparatus includes a first detector including a first image data collecting unit to obtain first image data and a liquid-phase nitrogen storing tank used to cool an image obtaining sensor, a second detector including a second image data collecting unit to obtain second image data, and a liquid-phase nitrogen storing tank used to cool an image obtaining sensor, a controller to process the first and second image data obtained by the first detector and the second detector, respectively, and an auxiliary liquid-phase nitrogen tank separated from the liquid-phase nitrogen storing tank. The auxiliary liquid-phase nitrogen tank complements liquid-phase nitrogen for cooling.

Abstract: A method of reducing uncertainty, which exactly finds the hydraulic conductivity and the specific storativity of a rock sample in pressure pulse-decay measurement. Axial and confining pressures are applied to the rock sample, and upstream and downstream reservoirs are connected to the rock sample. Coordinate values representing minimum values of a contour of a graph of an objective function, in which the hydraulic conductivity and the specific storativity obtained through the pressure pulse-decay measurement scheme to apply pressure pulses from the outside are expressed in horizontal and vertical axes are found from the graph. The coordinate values are set as the hydraulic conductivity and the specific storativity of the rock sample. Graphs of objective functions obtained by repeating the pressure pulse-decay measurement while changing boundary conditions are shown in overlapped, thereby reducing the uncertainty of the hydraulic conductivity and the specific storativity of the rock sample.

Abstract: The present invention provides a method of separating and recovering iron from a waste non-ferrous slag, generated in a process for smelting of non-ferrous metals, including copper, zinc and lead, in which a reducing agent and a reaction catalyst are added to the crushed waste non-ferrous slag, and the mixture is subjected to a reduction reaction, thereby converting amorphous iron oxides, bound to alumina, calcium oxide, magnesium oxide, silica, and the like in the waste non-ferrous slag, to crystalline iron (Fe) and iron carbide (Fe2C); the resulting material is crushed to separate iron and iron carbide obtained by the reduction reaction from components such as alumina, calcium oxide, magnesium oxide, silica, and the like; the crushed material is separated into fractions by particle size; and the fractions are subjected to wet magnetic separation and dry magnetic separation to separate and recover magnetic iron concentrates from the fractions.

Abstract: Provided are an underwater detector and a method for an underwater detection, and more particularly, an underwater detector including two direct current electrodes and a plurality of measurement electrodes in order to sense a movement of an object having conductivity different from that of water underwater. Since the underwater detector according to the present invention includes two direct current electrodes, a plurality of measurement electrodes, and a control and measurement module for measuring voltages of the plurality of measurement electrodes, the plurality of measurement electrodes each include an electrode control module and the electrode control module includes a first switch, a second switch, a controlling unit, and the like, the number of voltage measurement lines may be small and a voltage between two selected electrodes may be easily calculated.

Abstract: Provided is a coring apparatus for collecting marine sediments, and more particularly, to a coring apparatus having a core filled with marine sediments when the coring apparatus is inserted into a seabed.

Abstract: The present invention relates to a method of recovering acid and a platinum group metal from a leaching solution of a spent catalyst, more particularly, to a method of recovering acid and a platinum group metal from a leaching solution of a spent catalyst, the method including: filtering a leaching solution of a spent catalyst, providing the filtered leaching solution into a concentration chamber, and heating the filtered leaching solution to recover acid included in the leaching solution; providing a concentrated solution of the leaching solution into a substitution chamber after recovering the acid, and adding a metal for a substitution reaction; and cleaning a solid, which is separated by solid-liquid separation after the substitution reaction, with acid and recovering the platinum group metal.

Abstract: Disclosed is a method for selectively separating and recovering silicon from waste silicon sludge generated during a semiconductor manufacturing process. With the method for separating and recovering silicon from the silicon sludge, oil components, iron, silicon carbide that are included in the silicon sludge may be removed and silicon may be selectively separated and recovered. In addition, silicon may be efficiently recovered without injection of an additive for precipitating a specific component or without a separate device such as a magnetic separator, or the like, for removing iron.

Abstract: Provided is an apparatus for extracting, analyzing, and storing gas in a drilled core on a ship. The apparatus includes: a needle for core insertion inserted into the drilled core to allow the gas in the drilled core to the outside; and a first 3-way valve into which the gas passing through the needle for core insertion is introduced and which controls the introduced gas so as to be supplied to a gas storing container or gas analyzing apparatuses positioned on a ship.

Abstract: Disclosed are an apparatus and a method of measuring porosity and permeability of a carbon dioxide underground storage medium. Both of the porosity and the permeability are measured in the state that the confining pressure is applied once. The variation characteristic in the porosity and the permeability of the core sample according to the salt precipitation occurring when supercritical carbon dioxide is injected is continuously measured. The apparatus includes a holder receiving a core sample, a pressure pump applying a confining pressure to the core sample, a gas chamber storing gas and supplying supply the stored gas to the core sample, first to third pressure gauges measuring an internal pressure of the gas chamber and front and rear portions of the holder, and a gas flow meter measuring a flow rate of gas.

Abstract: Disclosed is a method of detoxifying asbestos by using a room-temperature recrystallization scheme. The method includes heat-treating a rock or slate containing asbestos; and putting the heat-treated rock or slate in an aqueous solution, to which organic acid is added, to allow the heat-treated rock or slate to react with the aqueous solution having the organic acid.

Abstract: Disclosed is a method of preparing mesoporous silica particles. The method includes (a) preparing an aqueous silicic acid, (b) spraying the aqueous silicic acid in a droplet state by activating the aqueous silicic acid, and (c) pyrolyzing the sprayed droplet through a reactor, which is previously heated, by allowing the sprayed droplet to pass through the reactor together with a carrier gas. The aqueous silicic acid includes 0.4 M to 0.8 M of silicic acid.

Abstract: A permeameter for in-situ measurement of saturated hydraulic conductivity is presented. The permeameter includes a chamber fixedly installed into streambed sediment such that the inside of the chamber is filled with a medium, sediment at water-sediment interface. First and second hydraulic head-measuring lines are respectively connected to upper and lower portions of an outer circumferential surface of the chamber, these are designed for measuring a hydraulic head difference of the inside of the chamber. A flexible tube is interconnected the chamber with the storage pipe. A storage pipe is designed to regulate a hydraulic head difference from the chamber and to measure a quantity and a flow rate of water introduced from the chamber under the streambed.