7 results about "Soil solution" patented technology

This invention relates to the field of soil environmental monitoring technology, and in particular discloses a sampling device for simultaneously collecting in-situ soil solutions and gases. The device comprises a support frame unit, a sampling device installed within the support frame unit, a drive device installed on the support frame unit, and a controller for controlling the drive device and the sampling device. The sampling device includes an aperture opener for drilling, a collector for simultaneously collecting soil solutions and gases from the drilled hole, and a gas-liquid separation unit for separating the collected solutions and gases. This device is a complete sampling system that not only reduces equipment costs and improves sampling efficiency, but also ensures the correlation and accuracy of synchronous, in-situ sampling data. By simultaneously, in-situ, and isolatedly collecting soil solutions and soil gases from the same borehole and at the same depth, it avoids cross-contamination and atmospheric interference, significantly improving sampling efficiency and data comparability, and providing a reliable technical means for research on multi-media soil environments.

The present application relates to the technical field of drainage board, and particularly relates to a fuzzy comprehensive evaluation method, equipment and medium for degradable drainage board degradation performance, which comprises the following steps: preparing PLA / PBAT composite modified degradable drainage board and burying the drainage board in soft soil samples or simulated soil solution environment; testing initial performance of the drainage board and mechanical properties, hydraulic performance and molecular structure related indexes of the drainage board at different predetermined ages; performing dimensionless processing on the test indexes to obtain corresponding retention rates and glass transition temperature retention degrees; based on the dimensionless indexes, constructing an evaluation index factor set and a comment set, determining index weights by using a combination method of entropy weight method and analytic hierarchy process, and performing fuzzy comprehensive evaluation by using minimum upper bound and type fuzzy operators to calculate a comprehensive evaluation score; combining with an engineering predetermined safety threshold, determining a drainage board degradation completion time or a reasonable service upper limit according to a change curve of the comprehensive evaluation score with the age, and constructing a multi-index evaluation system, which reduces engineering risks caused by single index evaluation.

The application discloses a kind of field scale soil pollutant migration simulation system and method, it is related to soil pollutant migration simulation technical field, including the following steps: based on target field construction with multiple grid units pollutant colloidal co-migration initial model, and initial parameter set is distributed to each grid unit;Soil in-situ monitoring data of target field are acquired, and preprocessing is carried out to obtain ion intensity data of soil solution and ion acid-base field data covering target field;Based on ion acid-base field data, the first risk probability of each grid unit in future period is calculated to occur colloidal release possibility.The application accurately locates the core high-risk area of pollutant colloidal co-migration in the whole field, determines the key range of data assimilation, effectively avoids the disadvantages of indiscriminate correction in the whole area, ensures that the limited observation resources and computing resources are focused on the high-weight area, and effectively improves the efficiency and accuracy of data assimilation.

The application belongs to the technical field of soil solution collection, and particularly relates to a soil solution in-situ extraction and collection device, which comprises a pipe body, an adjusting part and a solution sampler, the solution sampler is connected with a first suction pipe, a track column is installed in the pipe body, a T-shaped groove and an adjusting groove are axially arranged on the track column, a carrier is slidably installed in the T-shaped groove, the carrier comprises an integrated carrier table and a T-shaped block, a sliding groove and a mounting hole, which are in communication with each other, are arranged on the carrier table, a screw rod is installed in the mounting hole, a movable part is threadedly connected with the screw rod, the movable part is detachably connected with the solution sampler, a first bevel gear is installed at one end of the screw rod, a mounting seat matched with the adjusting groove is installed on the T-shaped block, a rotating shaft is installed in the mounting seat, a hexagonal sleeve and a second bevel gear are respectively installed at two ends of the rotating shaft, the second bevel gear is engaged with the first bevel gear, and the device is used to solve the problems that the original structure of soil is seriously damaged during soil sampling, it is difficult to obtain real soil solution samples, and it is difficult to maintain.

The present application relates to the technical field of soil improvement, in particular to a saline-alkali soil improver and its preparation method and use method, the saline-alkali soil improver comprises, according to percentage by weight, sludge 30-50%; green waste 30-50%; superphosphate 10-20%; fermented sheep manure 9-12%; EM bacteria 0.1-0.5%; bacillus subtilis 0.1-0.5%; trichoderma harzianum 0.1-0.5%; soybean meal 0.7-2%. The present application provides a saline-alkali soil improver, which is rich in beneficial bacteria and has biological activity; it is slightly acidic, can effectively neutralize the alkalinity of saline-alkali soil and reduce the soil PH value; the humic substances in the improver contain numerous active functional groups, which can promote the exchange of salt ions on the surface of soil particles, reduce the salt concentration in soil solution; it can improve the salt tolerance of plants, promote crop growth, regulate the microbial environment of plant roots, improve soil structure and increase soil permeability. It can reduce the bulk density of soil, inhibit the upward movement of capillary water, reduce water evaporation and salt surface aggregation.