7 results about "Hazardous metals" patented technology

The invention belongs to the field of waste battery material recovery, and provides a waste battery material recovery method based on a plasma chemical vapor deposition technology. Firstly, a network compound with a metal chelating function is synthesized and forms stable combination with active sites on the surface of an electrode in subsequent coating deposition, and harmful metal ions are effectively captured; secondly, a fluorine-containing imidazolyl-quaternary ammonium salt network compound is designed, and the fluorine-containing imidazolyl-quaternary ammonium salt network compound is endowed with excellent surface passivation and chemical stability by a fluorinated group; in the stripping process, the active material and the metal current collector are separated by periodically adjusting the temperature and combining the plasma technology, the stripped active powder can be further extracted and purified through acid pickling treatment, and the metal current collector is combined with a fluorine-containing compound and an inorganic silica network deposition process. The metal surface is endowed with good corrosion resistance and reprocessing performance, the method is suitable for recycling of electrode materials in waste batteries, and meanwhile the recycling value of related materials is improved.

1. Name of the product in this design: Handheld metal detector. 2. Purpose of this design: For detecting hazardous metal materials. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: 3D view 1.

1. Name of the product in this design: Handheld metal detector. 2. Purpose of this design: For detecting hazardous metal materials. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: 3D view 1.

One of our goals is to provide a new agent that can remove harmful metals that have entered the body, and that is safe and easy to ingest. [Solution] The above problem is solved by providing an oral composition for removing metals, which contains calcium phosphate as an active ingredient.

The application discloses a method for synthesizing sodalite by a hydrothermal method and solidifying and stabilizing harmful metal elements and application thereof, and belongs to the technical field of solidification treatment of hazardous waste. In the method, raw materials for synthesizing the sodalite, such as silicon dioxide, are pretreated by ball milling, and then the sodalite solidification body is rapidly synthesized by hydrothermal synthesis at a low temperature for a certain time, and radioactive harmful substances, such as radioactive waste salt in the nuclear industry, are simultaneously solidified in the process. The sodalite synthesized under the optimized conditions can also be used as an adsorbent to be extended to environmental media such as aqueous solution and liquid salt and be used for adsorbing radioactive or other common heavy metal harmful elements. The method has the advantages of fast reaction rate, high immobilization rate, strong stability, low cost and environmental friendliness and the like, and has important application value in the field of treatment and disposal of radioactive waste salt and other hazardous waste.

The invention relates to the technical field of water treatment and precious metal separation and purification, and particularly discloses a method for synchronously removing, separating and purifying precious metal silver and harmful metal in wastewater. The method comprises the following steps: (1) adding an adsorbent containing amidoxime groups on the surface into wastewater, and carrying out adsorption treatment; (2) adding the adsorbent after adsorption into a primary desorption solution of non-oxidizing acid, and carrying out primary desorption to remove hetero-ions except silver; and (3) the adsorbent obtained after primary desorption is added into a secondary desorption solution of oxidizing acid, secondary desorption is conducted, and a high-purity silver solution is obtained. The method is based on the principle that amidoxime groups can spontaneously reduce silver ions into acid-resistant silver nanoparticles, and other metal ions form acidolysis complexes. The method is simple and convenient, an external electric field or a reducing agent is not needed, water purification and high-purity recovery of silver are achieved, and remarkable economic and environmental benefits are achieved.

The utility model relates to a pre-filter pollution discharge structure with a magnetic attraction function. The pre-filter pollution discharge structure comprises a pre-filter pollution discharge seat, a pre-filter bottle, a magnetic attraction component and a valve component, the pre-filter bottle is inserted into the pre-filter pollution discharge seat, and a water outlet of the pre-filter bottle is communicated with the pre-filter pollution discharge seat; the magnetic attraction assembly is installed on the pre-filter pollution discharge seat and located on the outer wall of the pre-filter bottle, the magnetic attraction assembly is located above a water outlet of the pre-filter bottle or flush with the water outlet of the pre-filter bottle, and the valve assembly is installed between the water outlet of the pre-filter bottle and the pre-filter pollution discharge seat. The water purifier has the advantages that the structure is compact, the product size can be reduced, the material cost and the packaging cost are reduced, and scrap iron, cobalt, nickel and other harmful metals in water can be adsorbed.