Chemical agent and process for treating wastewater containing thallium and heavy metals

Abstract

The invention discloses a chemical agent for treating wastewater containing thallium and heavy metals. The chemical agent is mainly prepared from 1-90 percent of a component A, 1-90 percent of a component B and 1-98 percent of a component C, wherein the component A is one or combination of arbitrary two of sodium dimercaptosuccinate and derivatives thereof; the component B is one or combination of arbitrary two of hydroxames; and the component C is one or combination of arbitrary two of dialkyl dithiophosphate. The process comprises the following steps: dissolving the chemical agent in water to prepare a chemical agent aqueous solution which has a mass concentration of 2-20 percent; putting the chemical agent aqueous solution into to-be-treated wastewater containing thallium and heavy metals and / or radioactive substances, and sufficiently stirring to form metal complex; adding a little amount of inorganic flocculant containing magnesium, iron, silicon or aluminum and / or polymer flocculant to form flocculent precipitation which can be filtered and separated; and finally filtering and separating to complete wastewater treatment. The chemical agent can be used for realizing functions of deodorizing waterbody, removing organic matters, completely removing thallium and heavy metals and the like.

Description

technical field

[0001] The invention belongs to the field of wastewater treatment, and in particular relates to a medicament and a process for treating wastewater containing thallium and heavy metals. Background technique

[0002] There are many thallium-containing ore deposits in my country, and thallium resources are abundant, and its reserves rank first in the world. Thallium is a light blue-gray-white metal that is easily soluble in nitric acid, sulfuric acid and water. Under natural conditions, thallium mainly forms as Tl + or Tl 3+ Exist in the form of , the abundance is about 0.75mg·kg -1 , the main characteristics of thallium are highly dispersed and widely distributed. Thallium is a typical dispersive element, which is widely used in aviation, electronics and hygiene, but at the same time, thallium is a highly toxic heavy metal element. With the continuous development and utilization of thallium resources, soil thallium pollution, water body thallium pollution a...

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