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Thallium-containing waste water purification method, thallium element enriching and recovering method and application of purification method

A recovery method and technology of thallium element, which is applied in chemical instruments and methods, water pollutants, water/sewage treatment, etc., can solve the problems of high treatment cost, high input cost of reagent materials, unstable thallium removal effect, etc. Simple steps, reduced material costs, and low operating costs

Active Publication Date: 2017-11-24
GUANGZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problems to be solved by the present invention: the existing wastewater thallium removal technology is cumbersome to operate, the cost of using reagent materials is high, the effect of thallium removal is unstable, and the high operating cost is unbearable for most enterprises; in addition, the existing wastewater thallium removal technology , does not have the functions of enrichment, concentration and recovery of thallium, making the material for removing thallium a hazardous waste with higher processing costs

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The thallium-containing wastewater to be treated in this embodiment is simulated wastewater, and the thallium content reaches 10 mg / L. In this embodiment, the simulated wastewater is treated by using the purification and enrichment recovery treatment method of thallium-containing wastewater. Including the following steps:

[0026] 1) Add sodium hydroxide solution to 1000mL wastewater to adjust the pH to 11;

[0027] 2) Add ferric iron tetroxide powder to the wastewater that has been adjusted to alkalinity for adsorption reaction for 5 minutes, and the dosage is 4g / L;

[0028] 3) Use a magnet block to attract the ferric oxide powder that has been adsorbed and reacted on the outer wall of the container for solid-liquid separation for 5 minutes, and the supernatant is the purified water from which the thallium element has been removed;

[0029] 4) Remove the magnet block, add 20mL dilute nitric acid to the ferric oxide powder that has been reacted to adjust the pH to 1.5...

Embodiment 2

[0033] The waste water used in this embodiment is the same as that of Example 1. The simulated wastewater is treated by using the above-mentioned purification and enrichment recovery treatment method of thallium-containing wastewater. Including the following steps:

[0034] 1) Add potassium hydroxide solution to 1000mL wastewater to adjust the pH to 12.5;

[0035] 2) Add ferric iron tetroxide powder to the wastewater that has been adjusted to alkaline for adsorption reaction for 30 minutes, and the dosage is 2g / L;

[0036] 3) Use a magnet block on the outer wall of the container to attract the ferric oxide powder that has been adsorbed and reacted for solid-liquid separation for 30 minutes, and the supernatant is the purified water from which the thallium element has been removed;

[0037] 4) Remove the magnet block, add 20mL dilute hydrochloric acid to the ferric oxide powder that has been reacted to adjust the pH to 3.0, and carry out the desorption reaction for 60 minutes...

Embodiment 3

[0041] The waste water used in this embodiment is the same as that of Example 1. The simulated wastewater is treated by using the above-mentioned purification and enrichment recovery treatment method of thallium-containing wastewater. Including the following steps:

[0042] 1) Add calcium hydroxide solution to 1000mL wastewater to adjust the pH to 12.0;

[0043] 2) Add ferric iron tetroxide powder to the wastewater that has been adjusted to alkaline for adsorption reaction for 20 minutes, and the dosage is 5g / L;

[0044]3) Use a magnet block to attract the ferric oxide powder that has been reacted on the outer wall of the container for solid-liquid separation for 20 minutes, and the supernatant is purified water from which thallium has been removed;

[0045] 4) Remove the magnet block, add 20mL of dilute sulfuric acid to the ferric oxide powder that has been reacted to adjust the pH to 2.0, and carry out the desorption reaction for 40min;

[0046] 5) Use a magnet block to a...

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Abstract

The invention discloses a thallium-containing waste water purification method which is used for removing a thallium element in waste water. The purification method includes the steps: 1) adding alkali liquor into the waste water, and adjusting pH (potential of hydrogen) to be alkaline; 2) adding magnet powder into the waste water adjusted to be alkaline, performing adsorption reaction on mixture; 3) sucking the magnet powder after reaction by the aid of a magnet block, and performing solid and liquid separation to obtain liquid supernatant, namely, purified water removing the thallium element. The invention further provides a thallium element enriching and recovering method. According to the method, the magnet powder after adsorption reaction in the thallium-containing waste water purification method is desorbed, and the thallium element adsorbed by the magnet powder is enriched into desorption liquid. The method is low in cost and simple and convenient to operate, adsorption materials can be repeatedly used, the thallium element in the waste water can be efficiently removed, and the method is applicable to purifying, enriching and recovering of the thallium element in the thallium-containing waste water with low, medium and high-concentration.

Description

technical field [0001] The invention belongs to the technical field of waste water treatment, and in particular relates to a method for purifying waste water containing thallium and a method for enriching and recovering thallium element. The invention can effectively remove the thallium element in the thallium-containing wastewater, and can realize the enrichment and recovery of the thallium element. Background technique [0002] Thallium is a dispersed rare heavy metal element, widely used in optics, medicine, aerospace, high-energy physics, ultra-low temperature materials and superconducting materials and other industries. At the same time, thallium is also a highly toxic element, its toxicity is higher than that of cadmium, mercury, lead and other highly toxic heavy metals, and it has strong bioaccumulation, which poses a great threat to the human body and the ecological environment. In addition, thallium is often associated with other non-ferrous metal minerals, resulti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/12C02F101/20
CPCC02F1/488C02F1/66C02F2101/20
Inventor 李伙生陈永亨龙建友肖唐付张平张高生黎秀菀李珂珂林茂李长林庄凌志黄文玉
Owner GUANGZHOU UNIVERSITY
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