Method for removing trace thallium contained in water

A micro-dosage technology, applied in the field of removal of micro-thallium in water, can solve the problems of complex processing technology, difficult recovery of heavy metals, high operating cost, etc., and achieve the effect of simple technical process, low operating cost, and easy precipitation and separation

Inactive Publication Date: 2014-07-16
HARBIN INST OF TECH
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  • Summary
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  • Claims
  • Application Information

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Problems solved by technology

[0005] The present invention aims to solve the problem of complex processing technology and high operating cost in the existing method for removing trace thallium in water, which cannot meet the "Drinking Water Hygienic Standard", and the use of engineering nanomaterials to remove heavy metals in water is difficult to recycle and separate after use. problem, and provides a method for removing trace thallium in water

Method used

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  • Method for removing trace thallium contained in water

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specific Embodiment approach 1

[0015] Specific implementation mode 1: The method for removing trace amounts of thallium in water described in this implementation mode is specifically carried out according to the following steps:

[0016] 1. Add ferrate to the water containing a small amount of thallium, and then react at a speed of 260r / min to 350r / min for 1min to 5min to obtain a mixed solution; the dosage of ferrate is 1mg / L ~25mg / L;

[0017] 2. At a rotating speed of 150r / min to 250r / min, the mixed solution obtained in step 1 was continuously stirred and adsorbed for 5min to 10min to obtain the mixed solution after adsorption;

[0018] 3. Add a coagulant to the mixed solution after adsorption, and then go through coagulation, precipitation and filtration in order to remove trace thallium in the water; the dosage of the coagulant is 1mg / L~45mg / L .

[0019] The ferrate added in step 1 of this embodiment is potassium ferrate or sodium ferrate. In this embodiment, in the selection of ferrate, it is based ...

specific Embodiment approach 2

[0024] Embodiment 2: This embodiment differs from Embodiment 1 in that: the dosage of ferrate described in Step 1 is 1 mg / L-20 mg / L. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0025] Embodiment 3: This embodiment differs from Embodiment 1 or Embodiment 2 in that: the dosage of ferrate described in step 1 is 15 mg / L. Others are the same as in the first or second embodiment.

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Abstract

The invention relates to a method for removing trace thallium contained in water, relating to a method for removing the trace thallium contained in the water and aiming at solving the problem that the traditional method for removing the trace thallium contained in the water is complex in treatment technology and high in operating cost, can not reach the 'drinking water sanitary standard' and difficultly recovers and separates engineering nanometer materials after usage by removing heavy metals contained in the water by adopting the engineering nanometer materials. The method comprises the following steps: adding ferrate to the water which contains the trace thallium for reaction, and stirring for adsorption; then adding a coagulant; and finally coagulating, depositing and filtering sequentially to remove the trace thallium contained in the water. The method disclosed by the invention achieves the thallium removal efficiency more than 90%, is simple in technical process and low in operating cost, realizes the effective removal of the thallium and used for removing the trace thallium contained in the water. According to the method, the drinking water reaches the 'drinking water sanitary standard', namely the thallium is less than 0.1 microgram/L.

Description

technical field [0001] The invention relates to a method for removing trace amounts of thallium in water. Background technique [0002] Thallium is a highly dispersed rare metal element widely used in industries such as chemical industry, electronics, medicine, aerospace, high-energy physics and superconducting materials. At the same time, thallium is an element with strong physiological toxicity. Due to the continuous development and utilization of thallium-containing resources, the ways for thallium to enter the water environment are expanding. Therefore, thallium has become one of the highly toxic heavy metal elements that has attracted more attention in the field of water treatment research. Thallium mainly exists in the positive monovalent form in nature, and can enter the human body through the digestive tract, skin contact, and inhalation of floating dust and smoke, leading to thallium poisoning in humans. Thallium poisoning can cause numbness or pain in the lower l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04
Inventor 马军皇甫小留王雅安路希鑫江进庞素艳
Owner HARBIN INST OF TECH
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