1. scope of application

Treatment of heavy metal wastewater from non-ferrous metal mining, smelting, and electroplating

2. Brief description of technology

Based on the variable valence characteristics of rare earth elements, ion exchange inhalation and chemical reaction methods are used to load nano-hydrated oxides with new material structures on the surface of the resin matrix. A series of products such as cationic nano-adsorbents and anionic nano-adsorbents with independent intellectual property rights have been developed, and this is the core to form heavy metal wastewater advanced treatment technology. This technology can effectively adsorb and remove lead, cadmium, arsenic, antimony and thallium in wastewater. The heavy metal indicators in the treated water can meet the Class III requirements of the surface water environmental quality standard, effectively improving the ecological environment of areas involving heavy metals.

3. technical information

Adsorption capacity: 710 cadmium, 6400 lead, 1120 arsenic, 350 antimony, 1240mg/L thallium. Processing flow rate 7~21Bv/h。

4. comprehensive benefits

This technology is an advanced treatment technology. The treatment objects are the concentration of lead, cadmium, arsenic, antimony, thallium and other pollutants in the water treated by the plant's heavy metal wastewater treatment system, which is within the industry emission standard limit value 3~5 times the range of wastewater. lead, cadmium, arsenic, antimony and thallium treat by that technology can stably meet the requirements of III type or special emission limit value of the surface water environmental quality standard. can effectively reduce the efflux of heavy metals in wastewater and has obvious environmental benefits. Taking the advanced treatment project of ore-dressing wastewater of Chehe concentrator as an example, the project adopts the method of "mechanical filtration + heavy metal (lead and cadmium) adsorption + arsenic adsorption" to deeply treat the overflow water of tailings pond, the treatment water quantity Q=1200m3/d (50m3/h), arsenic 0.05mg/L, cadmium 0.005mg/L, lead 0.05mg/L, zinc 1mg/L and copper 1mg/L in the effluent of the flowsheet, through the advanced treatment of ore-dressing wastewater of this project, heavy metals and arsenic pollutants discharged into surface water by enterprises can be greatly reduced, and the emission reduction of heavy metals can reach lead 68.8kg/a, cadmium 15.8kg/a and arsenic 79.2kg/a, which has high environmental and social benefits.