167 results about "Sodium diethyldithiocarbamate" patented technology

The invention discloses nano biological filler for purifying aquaculture wastewater in a biological filter tank and a preparation method of the nano biological filler. The biological filler comprises an EM rejuvenation solution and an adsorption carrier of the EM rejuvenation solution, wherein the EM rejuvenation solution is a product obtained by performing mixed fermentation on an EM stock solution, molasses and deionized water; the adsorption carrier is obtained by performing mixed pressing on composite nano powder, kaolin powder and modified bentonite; the composite nano powder is a product obtained by performing mixing and high-temperature sintering on nano-level aluminum oxide, titanium dioxide and silicon dioxide; modified bentonite is prepared from sodium diethyldithiocarbamate modified original soil. The preparation method comprises the following steps: pressing adsorption carrier particles; fermenting to obtain the EM rejuvenation solution; dipping the EM rejuvenation solution by using the adsorption carrier to obtain the nano biological filler. The obtained nano biological filler is high in pore volume, high in cell adsorption capacity, large in specific surface area and strong in stability, has a good treatment effect on aquaculture sewage, and can be used for rapidly removing ammonia nitrogen, phosphorus and heavy metal ions in an aquaculture water body.

The invention discloses a combined treatment method of electroplating mixed wastewater. The method comprises the steps of adjusting and maintaining pH of the wastewater to 10.5-12 by using lime emulsion, and adding sodium hypochlorite sodium cyanide oxide, organic amine containing hydroxyl and like pollutants; adding a ferrous chloride solution, and precipitating an organic acid coordination agentcontaining carboxyl in the wastewater by using ferrous ions and calcium ions together, wherein the ferrous ions reduce hexavalent chromium into trivalent chromium and generate chromium hydroxide precipitate; filtering to remove the precipitate; adjusting a pH value of the wastewater to 4.5-5.5, precipitating heavy metal ions by using sodium dimethyldithiocarbamate or sodium diethyldithiocarbamate, and adsorbing precipitates and a heavy metal trapping agent by using activated carbon; filtering to remove precipitate; and adjusting the pH value of the wastewater to 6-8, and destroying the aliphatic polyamine complexing agent and reducing COD by using the existing biodegradation technology. Through the method disclosed by the invention, the heavy metal and like pollutants in the electroplating mixed wastewater can be effectively removed, the treatment cost is low, and the method has good market application prospect.

A pasted positive nickel hydroxide electrode for use in battery cells (e.g., in nickel zinc cells, and nickel metal hydride cells) includes nickel hydroxide particles, a cobalt metal and / or cobalt compound and a sulfur-containing complexing agent capable of forming a complex with cobalt. The presence of the sulfur-containing complexing agent, such as dialkyldithiocarbamate (e.g., sodium diethyldithiocarbamate) improves lifetime and capacity utilization of the nickel electrode. The resulting pasted nickel hydroxide electrode includes a CoOOH conductive matrix after formation. The surface of the nickel hydroxide particles in the electrode is modified in some embodiments by providing a cobalt-containing coating onto the surface of the nickel hydroxide particles, followed by oxidation with a strong oxidizing agent. The complexing agent can be added before, after, or during the oxidation.