2results about How to "Overcome churn" patented technology

The invention discloses a coal gasification slag-based porous sponge for uranium mine wastewater treatment and a preparation method thereof, relates to the field of radioactive wastewater treatment and solid waste recycling, and aims to solve the technical problems of poor adsorption inertia, poor interface stability and insufficient selectivity of the existing coal gasification slag-based material in strongly acidic uranium mine wastewater. According to the technical key points, the method comprises the following steps: step 1, preparing an alkaline solution, putting the coal gasification slag into the alkaline solution for etching treatment, and collecting the treated coal gasification slag to obtain solid powder A; 2, grinding and mixing the solid powder A and urea, and performing pyrolysis treatment in a nitrogen atmosphere to obtain nitrogen-doped coal gasification slag-based porous sponge B; 3, placing the porous sponge B in a mixed acid solution of nitric acid and hydrochloric acid for carboxylation modification to obtain sponge C with the surface rich in carboxyl; step 4, immersing the sponge C into a PEI aqueous solution; pEI is chemically bonded with the sponge through carboxyl on the sponge C, and the coal gasification slag-based porous sponge is obtained.

This invention discloses a self-regulating circulating reinforcement system and construction method based on construction solid waste and synergistic MICP (Mineralized Organic Powder). The system includes a matrix construction layer, a dual-channel grouting pipe network, a grouting unit, a circulating drainage unit, a permeability monitoring unit, and a central control unit. The method includes: pre-mixing crushed and screened construction solid waste with mineralized bacterial solution for backfilling; laying a dual-channel grouting pipe network; using the central control unit to calculate the target stiffness based on a multi-level loading cumulative plastic strain prediction model, and controlling the injection flow rate and pressure of the gelling liquid; and recovering the reaction byproduct ammonium ions in real time through the circulating drainage module, and adjusting the grouting strategy based on the chemical parameters of the backfilled liquid. This application not only realizes the resource utilization of construction waste, but also solves the problems of uneven MICP reinforcement and ammonium contamination through intelligent closed-loop control, and possesses the ability to self-repair and replenish soil damage in the later stages.