3 results about "Silver preparation" patented technology

The application belongs to the field of sewage treatment, and specifically discloses a lead-bismuth smelting wastewater treatment method. The method comprises the following steps: (1) performing a sulfidation reaction on waste acid wastewater and desulfurization and denitrification wastewater with a sulfidation agent, and obtaining first filtrate through solid-liquid separation; (2) mixing the first filtrate with chlorine washing wastewater and silver preparation wastewater, and sequentially performing oxidation treatment, iron-based flocculation treatment, fluorine ion precipitation treatment and flocculation treatment, and obtaining second filtrate through solid-liquid separation; (3) adjusting the second filtrate to an alkaline condition, and sequentially performing thallium removal treatment, calcium ion precipitation treatment and secondary flocculation treatment, and obtaining purified filtrate through solid-liquid separation. The application combines modular treatment units with a collaborative process to construct an efficient and economical multi-medium wastewater treatment system.

The application relates to a silver spraying system and a silver spraying process. The silver spraying system comprises a high-speed spraying tank, a spraying power supply, a mother tank and an automatic silver ion supplementing system. The automatic silver ion supplementing system comprises a silver preparation tank, a silver preparation power supply and a control host. The control host is used for detecting the current of the spraying power supply through a signal line and controlling the silver preparation power supply to output a silver preparation current with the same size as the spraying power supply. When silver ions in the electroplating solution in the high-speed spraying tank are consumed and the silver ion concentration decreases, silver ions generated through the silver preparation tank are supplemented into the high-speed spraying tank, so that the silver ions are automatically supplemented, the concentration of the silver ions in the high-speed spraying tank is maintained, the silver plating effect of the workpiece to be plated is improved, and the convenience of supplementing silver ions in the electroplating solution is improved. The mother tank can play a buffering role to reduce the influence of the increased electroplating solution on the concentration of the electroplating solution remaining in the high-speed spraying tank, so as to ensure the spraying effect of the workpiece to be plated.

The invention relates to the technical field of medical raw material preparation, in particular to a method for green synthesis of nano-silver particles based on agriophyllum squarrosum extract and application. The agriophyllum squarrosum extract is loaded on nano-silver particles by adopting a mixed heating and multiple centrifugation method. The method disclosed by the invention is simple and convenient to operate, free of complex equipment or toxic chemical reagents, environment-friendly and relatively low in cost. The prepared nano-silver particles are uniform in particle size and good in dispersity, the average particle size is about 11 nm, the surfaces of the nano-silver particles are negatively charged, and the stability of the nano-silver particles is high. Biosafety evaluation shows that the particles have no obvious toxicity to fibroblasts at a relatively high concentration and have good biocompatibility. The prepared nano-silver particles can effectively promote migration and proliferation of fibroblasts, have the healing effect superior to that of a single agriophyllum squarrosum extract or a commercial nano-silver preparation in a mouse wound healing model, and can accelerate the wound repairing process.