Process for removing thallium through microelectrolysis treatment of thallium-containing heavy metal wastewater

Abstract

The invention relates to a process for removing thallium through microelectrolysis treatment of thallium-containing heavy metal wastewater. The process comprises a microelectrolysis part, a neutralization coagulation part and a sulfuric acid back adjustment part. The microelectrolysis treatment on the thallium-containing wastewater is performed through a high-activity microelectrolysis packing, and pretreatment thallium removal is performed; then the wastewater after microelectrolysis pretreatment thallium removal is subjected to acid-base adjustment and is adjusted to be alkaline, then a thallium removal agent and a flocculant are added successively, solid-liquid separation is performed through an inclined plate sedimentation tank, and thallium and heavy metal ions are removed; and finally sulfuric acid is used for adjusting and purifying water to be neutral, and then the wastewater is directly discharged to the outside. The process can effectively improve the removal rate of thallium and other heavy metal ions in the heavy metal wastewater, and prevents and controls the pollution of thallium and other heavy metal elements to a water environment.

Description

technical field [0001] The invention relates to a thallium-containing heavy metal wastewater micro-electrolytic treatment process for removing thallium, and relates to a deep purification treatment technology for thallium-containing wastewater, including the treatment of complex thallium-containing wastewater and trace thallium-containing wastewater of various heavy metal ions. The invention belongs to thallium-containing heavy metal wastewater processing fields. Background technique [0002] The rapid development of industrialization has caused a large amount of heavy metal wastewater to be discharged into the environment. The acidic heavy metal wastewater has a low pH (pH value between 4-6) and contains a variety of heavy metal ions, such as copper, lead, zinc, cadmium, arsenic, thallium, etc. , they cannot be decomposed by organisms, and once they enter the environment, they will continue to accumulate in the environment, causing serious pollution to water bodies and even...

AI Technical Summary

Problems solved by technology

[0009] Aiming at the shortcomings of the existing single process technology, the present invention provides a process for removing thallium by micro-electrolysis of thallium-containing heavy metal wastewater, which is clean and efficient, simple in operation, and strong in resistance to heavy metal impact loads. The specific process includes the micro-electrolysis part, the middle And the coagulation part with the sulfuric acid callback part:

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