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

A technology for heavy metals and chemicals, applied in the field of chemicals and processes for treating wastewater containing thallium and heavy metals, can solve the problems of complex treatment process, incomplete treatment and high cost, and achieve the effects of simple process, saving factory investment and fast processing speed.

Active Publication Date: 2015-04-01
CHANGSHA RES INST OF MINING & METALLURGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] At present, the above-mentioned research progress has been made on the pollution and treatment of thallium, but there are still some problems, such as complicated treatment process, high cost, and incomplete treatment

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Example 1: Comprehensive Wastewater Treatment Containing Thallium

[0028] A compound agent (RX-1 self-defined code) for treating thallium-containing and heavy metal wastewater of the present invention mainly consists of 7.8kg of 4-methyl-dimercaptobutane disodium, 32kg of 5,8-diethyl - 7-hydroxyl-6-dodecanone oxime, 20.2kg of 5-dodecyl salicylaldoxime and 40kg of dibutyl sodium dithiophosphate are placed in a mixing reactor and mixed uniformly.

[0029] Use inorganic thallium, Mn, Zn, Cu, Hg, Cd, Pb, Cr, Ni salts to prepare wastewater samples containing thallium and various heavy metal ions as shown in Table 1, take 100ml of water samples, and place them in a beaker stand-by.

[0030] After adding 100mL of 2% RX-1 pharmaceutical aqueous solution to the waste water sample to be used, after stirring for 5 minutes, a large amount of metal complex precipitates will be produced, then add 8ml, 1% concentration of magnesium hydroxide inorganic flocculant, and stir for 5 minu...

Embodiment 2

[0034] Embodiment 2: zinc metallurgical wastewater treatment

[0035] A compound agent (RX-2 self-defined code) for treating thallium-containing and heavy metal wastewater of the present invention mainly consists of 4kg dimercaptopropanol, 31kg 2-hydroxy-5-nonylbenzophenone oxime, 18kg dipropylene Potassium dithiophosphate and 47kg sodium diisobutyl dithiophosphate are placed in a mixer and mixed uniformly.

[0036] to 100m 3 Add 10m3 of the solution of RX-2 composite agent with a mass concentration of 3% to the waste water (zinc metallurgy waste water, washing water or filter press water, and the thallium and heavy metals contained in it are shown in Table 2 below), and a large amount of metals will be produced after stirring for 5 minutes. Complex precipitation, then add 1.5% magnesium hydroxide inorganic flocculant 0.5m 3 , stirred for 5 minutes, and finally added polyacrylamide 0.5% flocculant 0.2m 3 , and stir for 5 minutes. The sediment was removed by filtration, and...

Embodiment 3

[0040] Example 3: Treatment of metallurgical thallium-containing wastewater

[0041] A compound agent (RX-3 self-defined code) for treating thallium-containing and heavy metal wastewater of the present invention mainly consists of 25kg of 2-methyl-dimercaptobutane disodium, 28kg of 2-hydroxy-4-octyl Oxybenzophenone oxime and 47kg sodium diisopropyl dithiophosphate are placed in a mixer and mixed uniformly to make.

[0042] For the metallurgical wastewater in this example, different doses of composite agents (RX-3) were added, and the dosage was between 0.5 and 1.5 times the theoretical amount of heavy metals, and the relationship test between the addition and the treatment effect of heavy metals was carried out. The results As shown in Table 3 below.

[0043] Table 3: The effect of the addition amount of the compound agent on the treatment effect

[0044]

[0045] It can be seen from Table 3 that the removal rate increases with the increase of the amount of compound agent...

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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...

Claims

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Application Information

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IPC IPC(8): C02F1/62C02F1/52C02F1/00
CPCC02F1/5236C02F1/5272C02F1/56C02F2101/20C02F2101/203C02F2101/206C02F2101/22C02F2303/02
Inventor 肖国光杨国超肖祈春邓景衡余侃萍
Owner CHANGSHA RES INST OF MINING & METALLURGY
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