50 results about "Sediment–water interface" patented technology

An undisturbed box type sampler for sediment on water surface layers comprises a mud acquiring bucket, a mud acquiring bucket carrying handle, an expansion bracket, a counterweight and a traction rope. The mud acquiring bucket carrying handle consists of a carrying handle upright column and a carrying handle crossbeam, the carrying handle upright column is fixedly connected with the mud acquiring bucket, small holes are arranged on the carrying handle crossbeam, the expansion bracket comprises an expansion bracket upper plate and an expansion bracket lower plate, expansion bracket upright columns are fixedly connected with the expansion bracket upper plate and the expansion bracket lower plate and fixed onto the expansion bracket lower plate, an expansion bracket strut and the expansion bracket upright columns penetrate through the small holes on the carrying handle crossbeam, a compression spring is sleeved on the expansion bracket strut, the mud acquiring bucket is provided with a square box and two symmetric mud acquiring claws, shaft heads are disposed on two sides of the box, the mud acquiring claws are rotationally connected with the shaft heads, a tension spring is connected between the mud acquiring claws, the mud acquiring claws are connected with suspension plates, the traction rope penetrates through the expansion bracket upper plate to be connected with the carrying handle crossbeam, and the other end of the traction rope penetrates out from a hole on the counterweight. The sampler has the advantages that a sediment-water interface of acquired sediment on a surface layer is clear, layers of the sediment keep well, a sampling process is undisturbed, and the volume of the acquired sediment can be accurately computed.

The invention discloses a large deep lake water ecosystem restoration method. The large deep lake water ecosystem restoration method adopts basic condition improvement, a lake reservoir fencing net separation and partition technology, a transitional zone wash-preventing technology system, an inflow water front-arranged reservoir pre-treatment system, an ecological plant floating island construction, planting of submerged plants and floating-leaf vegetations in a planting area, spreading and planting of submerged vegetations in a deep-water area, a food network chain establishment, repair and management technology system, a sediment-water interface nutrient salt control system, a microbial membrane strengthening system, a species diversity habitat system and a lake water ecosystem protection technology. By the adoption of the large deep lake water ecosystem restoration method, the water body pollution load is effectively reduced, the water self-purification ability is improved, and a water body can be clear and be free of color and smell and accordingly is suitable for human to use.

The invention provides an indoor simulation system used for the process study between the sediments and the water surface of a lake. The indoor simulation system mainly comprises a water power disturbance system, an illuminating system, a constant-temperature water bathing system and an automatic sampling system. The invention has the advantages that the lake sediments are collected and directly put into a heat reserving box, the surface water power disturbance, the surface illumination, the surface temperature and the overlying water chemical features can be manually controlled, and long-time operation and multi-sampling are also available, without influencing the sediments and the surface process; the invention can, in fairly large scope, satisfy the requirements of the scheduled experimental conditions, so as to achieve the basic requirements of the researchers on studying the surface chemical or biological process. The system, being reliable and cheap, has advantages of compact structure, stable operation, long-time continuous running and long service life as well as convenient component disassembly-assembly and low cost.

The invention discloses a synchronous measuring sediment pore-water inorganic and organic matter concentration passive sampler, and belongs to the field of environmental research. The synchronous measuring sediment pore-water inorganic and organic matter concentration passive sampler comprises a passive sampling system and a supporting framework. In applications, sampling small bottles are filled with ultrapure water, are preloaded with different chemicals or articles based on the difference of pollutants, are covered with 0.45<mu>m microfiltration membrane, and are sealed with bottle caps provided with middle holes; the sampling small bottles are placed in grooves in the supporting framework; the whole synchronous measuring sediment pore-water inorganic and organic matter concentration passive sampler is immersed into water body sediment vertically under the action of self weight, and is allowed to stand; when balance is achieved, the synchronous measuring sediment pore-water inorganic and organic matter concentration passive sampler and the passive sampling small bottles are taken out from the water body sediment; and the concentrations of nutritive salts, heavy metals, and organic pollutants in wate samples in the passive sampling small bottles are measured via corresponding methods, so that synchronous measuring of high resolution ratio sediment-water interface inorganic and organic pollutant concentration is realized.

An apparatus and method for generating power from the voltage gradient naturally found in marine sediments. A pump flows sediment porewater to an anode, and a cathode is exposed to marine water. The arrangement can power a circuit.

The invention provides preparation method and application of efficient removing materials for interstitial water phosphate of sediments. Lake sediments are initiatively taken as basic materials of the materials and are subjected to calcination and alkaline washing, then the obtained material is mixed with kaolin, and mixed powder obtained is modified via ferric salt and then pore-forming agents are added for granulation and calcination shaping is peformed, and the low EPCo value and high Qmax value efficient removing materials for the interstitial water phosphate of the sediments are obtained. Concentration of the interstitial water phosphate of the sediments can be effectively cut down through the materials, and release of the phosphate of the sediments-water interfaces is restrained; desorption capacity of phosphate of the materials is weak and adsorption capacity is large, so that effective resistance and control of the materials on the sediments-water interfaces can be truly realized; the materials are low in cost, good in social and economic benefits, high in security, free of ecological risk on lake water, energy saving and environment friendly and remarkable in control effect on the sediments-water interfaces of different lakes of the Dian Lake during application.

The invention provides an indoor simulation device applied to the study of lake sediment-water interface process, which mainly includes four parts: hydrodynamic disturbance system, lighting system, constant temperature water bath system, and automatic sampling system. Its advantages are: the collected lake sediment Placed directly in the incubator, the interface hydrodynamic disturbance, interface light, interface temperature, and overlying water chemical properties can be artificially controlled, and it can run continuously for a long time and take multiple samples without affecting the sediment and interface process; It meets the requirements of preset experimental conditions to meet the basic requirements of researchers for interfacial chemistry or biological process research. The system has a compact structure, convenient assembly, disassembly and replacement of parts, stable, reliable and cheap operation, can run uninterrupted for a long time, and has a long service life.

The invention discloses a large deep lake water ecosystem restoration method. The large deep lake water ecosystem restoration method adopts basic condition improvement, a lake reservoir fencing net separation and partition technology, a transitional zone wash-preventing technology system, an inflow water front-arranged reservoir pre-treatment system, an ecological plant floating island construction, planting of submerged plants and floating-leaf vegetations in a planting area, spreading and planting of submerged vegetations in a deep-water area, a food network chain establishment, repair and management technology system, a sediment-water interface nutrient salt control system, a microbial membrane strengthening system, a species diversity habitat system and a lake water ecosystem protection technology. By the adoption of the large deep lake water ecosystem restoration method, the water body pollution load is effectively reduced, the water self-purification ability is improved, and a water body can be clear and be free of color and smell and accordingly is suitable for human to use.