Disposal method for thallium-containing solid waste

Abstract

The invention discloses a disposal method for thallium-containing solid waste. The disposal method comprises the following steps that by mass, 0.3-0.5 part of polyacrylate emulsion, 0.3-0.5 part of ethylene-vinylacetate copolymerized emulsion and 1-2 parts of cement are mixed together, and accordingly a thermoset encapsulating material is prepared; and the thermoset encapsulating material is added into the thallium-containing solid waste, mixing and stirring are conducted, then curing is conducted, and accordingly disposal of the thallium-containing solid waste is completed. The reactant consumption amount is reduced, and the enlargement ratio is decreased; and in addition, the good disposal effect is achieved, the leaching concentration of thallium contaminants in waste residues after disposal is lower than the industrial wastewater thallium pollutant discharge standard (DB44 / 1989-2017), and thus the disposal method can be applied and popularized on a large scale in the field of treatment of the thallium-containing waste.

Description

technical field [0001] The invention relates to the technical field of disposal of thallium-containing solid waste, in particular to a disposal method of thallium-containing solid waste. Background technique [0002] In 2014, Hunan Province issued the first discharge standard of industrial wastewater thallium pollutants in the country - "Industrial Wastewater Thallium Pollutant Discharge Standard" (DB43 / 968-2014). In 2017, Guangdong Province issued a stricter "Industrial Wastewater Thallium Pollutant Discharge Standard". Standards (DB44 / 1989-2017), all of which put forward higher requirements for the safe disposal of thallium-containing solid waste. [0003] In the existing technology, the newly-built thallium-containing wastewater treatment technology is mainly sulfidation method + adsorption treatment process, but this method produces a large amount of thallium-containing sulfidation waste residue, and conventional lime stabilization and cement solidification technologies ...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the technical problems of the existing thallium-containing solid waste disposal technology, such as high medicament dosage and poor disposal effect, the present invention provides a thallium-containing solid waste disposal method, which not only reduces the medicament consumption, but also reduces the capacity increase ratio, Moreover, it has a good disposal effect. The leaching concentration of thallium pollutants in the waste residue after disposal is lower than the "Discharge Standard for Thallium Pollutants in Industrial Wastewater" (DB44 / 1989-2017), which can be widely used in the field of thallium-containing solid waste treatment.