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Extraction and isolation method of tl form in plants

A separation method and morphological technology, applied in the field of extraction and separation of metal elements, can solve the problems of large consumption of reagents, high cost, and great environmental harm, and achieve good separation effect and prevent reduction and hydrolysis.

Active Publication Date: 2017-04-12
GUIZHOU INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] (2) The cost is high and additional instrumentation is required
[0006] (3) The separation process consumes a large amount of reagents, which is harmful to the environment

Method used

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  • Extraction and isolation method of tl form in plants
  • Extraction and isolation method of tl form in plants
  • Extraction and isolation method of tl form in plants

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0032] 1) Tl morphology extraction

[0033] Take 50-100mg of dried plant samples and place them in a 100mL polyethylene centrifuge tube with a cover, add 50mL of 5mmol / L DTPA solution, treat with 4 kHz ultrasonic waves in a 60°C water bath for 4h, and then use a centrifuge at a centrifugal force of 3000g Treat at low temperature for 10 minutes, pour out the supernatant; add 50mL of 5mmol / L DTPA solution again, treat with 4kHz ultrasonic waves in a water bath at 60°C for 4h, then use a centrifuge to process for 10min at a centrifugal force of 3000g, and pour out the supernatant; Combine the two supernatants and filter with a 0.45 μm membrane to obtain an extraction solution containing the chemical form of Tl;

[0034] 2) Tl morphology separation

[0035] Take 100mg of sodium lauryl sulfate and 1.5g of alumina in a 100mL beaker, add 50mL of ultrapure water, stir magnetically for 10min, pour off the supernatant; after washing with clean water several times, add 20mL of water and...

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Abstract

The invention discloses an extraction and separation method of Tl forms in plants and belongs to methods for extracting and separating metal elements from the plants. The method includes Tl form extraction and separation and specifically includes the steps that a diethylene triamine pentacetic acid (DTPA) solution is added into a plant sample, hot bath and ultrasonic treatment, centrifugal separation and filtering are performed, and an extracted solution is obtained; ultrapure water is added into lauryl sodium sulfate and aluminum oxide, stirring is performed, and a liquid supernatant is removed; water and a 8-hydroxyquinoline solution are added, oscillation, filtering, cleaning and drying are carried out, and an adsorbent is obtained; the adsorbent is added into a microcolumn, the pH value of the extracted solution is adjusted through ammonium hydroxide, the DTPA solution is added, and the extracted solution flows through the microcolumn; and after enrichment is finished, the microcolumn is cleaned, a sodium thiosulfate solution is made to pass through the microcolumn, and a column passion solution and sodium thiosulfate eluant flowing through the microcolumn are collected respectively. By means of the method, thallium in the plants can be completely extracted, effective separation of Tl (I) and Tl (III) can be achieved, and the effective method is provided for extraction and separation of thallium chemical forms from the thallium-rich plants.

Description

technical field [0001] The invention relates to a method for extracting and separating metal elements from plants, in particular to a method for extracting and separating forms of thallium from thallium-rich plants. Background technique [0002] Thallium (Tl) is a dispersed element, and independent minerals are rare, so it is extremely difficult to form independent thallium deposits. Thallium has two geochemical valence states, positive monovalent and positive trivalent, most of which are positive monovalent in nature. Thallium has dual geochemical properties of low-temperature ore-forming, sulfur-friendly, high-temperature dispersion, and lithophilic. Thallium and its compounds are extremely toxic, and their toxicity to mammals is stronger than that of mercury, lead, copper, and zinc. [0003] Due to the development and utilization of thallium-bearing ore deposits, the excavated thallium-bearing rock ore or smelting slag accumulates on the surface, and under long-term wea...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B61/00
CPCC22B61/00
Inventor 贾彦龙孙嘉龙肖唐付宁增平杨菲姜涛刘意章
Owner GUIZHOU INST OF TECH
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