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Method for removing vanadium citrate in water environment, kit and application

A technology of citric acid and water environment, applied in the field of environmental governance, can solve problems such as difficult and difficult to remove

Active Publication Date: 2021-09-21
CHINA UNIV OF GEOSCIENCES (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In aquatic or soil environments, more than 90% of metal ions are complexed, and since chelated metals are very stable in a wide range of pH conditions, they are difficult to remove using most existing technologies
Heavy metal ions are surrounded by organic ligands in the center, making the structure of heavy metal complexes more stable, and the conventional methods are not easy to remove

Method used

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  • Method for removing vanadium citrate in water environment, kit and application
  • Method for removing vanadium citrate in water environment, kit and application
  • Method for removing vanadium citrate in water environment, kit and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Embodiment 1, experimental apparatus and method

[0049] 1.1 Experimental reagents and instruments

[0050] (1) The natural iron ore used in the experiment is pyrite, which was purchased in Shiyan, Hubei Province on December 6, 2019.

[0051] The reagents used in the experiment are listed in Table 2, and the water used in the experiment is ultrapure water.

[0052] Table 2 Chemical Reagents

[0053]

[0054]

[0055] Note: The symbol "-" is a standard reagent and does not need to show purity.

[0056] (2) The instruments used in the experiment are listed in Table 3.

[0057] Table 3 Experimental Instruments

[0058]

[0059] 2.2 Experimental scheme

[0060] 2.2.1 Preparation of V(IV)-citric acid solution

[0061] Accurately weigh 0.03196g of vanadyl sulfate and dissolve it in deoxygenated ultrapure water, and let it stand for 48 hours. Weigh 0.0420g of citric acid, stir and dissolve it in ultrapure water, and store it in a brown bottle. Mix the configur...

Embodiment 2

[0092] Embodiment 2, pyrite / PMS removes the performance of vanadium citrate

[0093] 3.1 Effect of initial vanadium citrate concentration on the removal of vanadium citrate

[0094] Under the conditions of PMS concentration of 5mM and pyrite concentration of 8g / L, the effect of the initial vanadium citrate concentration on the reaction system was explored, and the performance of the reaction was measured by the total vanadium removal rate and TOC reduction rate.

[0095] The result is as figure 1 Shown, the reaction performance of 0.1, 0.2, 0.4, 0.6, 0.8mM vanadium citrate solution in pyrite / PMS system. As the initial concentration of vanadium citrate solution increases, within the concentration range of 0.1-0.4mM, vanadium citrate can be degraded rapidly, and the concentration of total vanadium is almost negligible. With the change of V(IV)-citric acid concentration in the reaction system, the degradation rates of total vanadium were 98.9±0.63%, 99.0±0.98%, 99.4±0.87%, 89.7...

Embodiment 4

[0122] Embodiment 4, the mechanism of pyrite / PMS degradation heavy metal complex

[0123] 5.1 Infrared spectrum analysis of heavy metal complexes degraded by pyrite / PMS

[0124] 5.1.1 UV spectrum of pyrite / PMS degradation vanadium citrate system

[0125] Figure 8 It is 8g / L of pyrite, the initial PMS concentration is 5mM, and the initial vanadium citrate concentration is 0.4mM under the condition of reacting, take reaction solution when 0min, 30min, 60min, 90min, 150min, carry out the infrared spectrum obtained by processing and detecting picture. exist Figure 8 , 3400cm also appeared at 0min -1 There is an OH bond attributed to carboxylic acid nearby, and the peak maintains a wide distance, which proves that V(IV) has a high degree of association with the organic ligand, and the heavy metal organic complex exists in a stable form. After 30 minutes of reaction, 3400cm -1 The peak tends to be horizontal, and in the first 30 minutes of the reaction, rapid and efficient d...

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Abstract

One or more embodiments of the invention relate to the technical field of environmental management, in particular to a method for removing vanadium citrate in a water environment, a kit and application. The method comprises the following steps: putting a vanadium citrate solution into a reaction container; adding the iron-based ore material and the peroxymonosulfate solution into a reaction container to obtain a reaction system; wherein in the reaction period of the reaction system, the reaction system is stirred for reaction; adjusting the pH value of the reaction system after the reaction to 7.5 or above so as to separate out a precipitate from the reaction system; removing the precipitate to remove vanadium from the aqueous environment. The method can be used for stably and efficiently removing the vanadium citrate in the water environment.

Description

technical field [0001] One or more embodiments of this description relate to the technical field of environmental governance, and in particular to a method, kit and application for removing vanadium citrate in a water environment. Background technique [0002] Vanadium (V) resources exist in mineral deposits and hydrocarbon deposits around the world. Weathering of vanadium-rich rocks and sediments results in cumulative concentrations of vanadium in soil and groundwater, which are transferred to groundwater by leaching by rain and water flow. Concentrations as high as 58-99 mg / L of vanadium were detected in groundwater of Mt. Fuji (Japan), and vanadium was leached through simple interaction of groundwater with volcanic rocks of Mt. Fuji. In human-intensive mining and smelting activities, a large amount of dust and wastewater containing heavy metal vanadium are produced during ore processing, which may enter the soil and groundwater. Groundwater contaminated with vanadium an...

Claims

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Application Information

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IPC IPC(8): C02F1/72C02F1/66C02F101/34
CPCC02F1/66C02F1/725C02F2101/34
Inventor 张宝刚杜君群
Owner CHINA UNIV OF GEOSCIENCES (BEIJING)
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