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Application of modified MIL-101-SO3NH4 material in aspect of adsorbing rubidium and caesium ions in water

A cesium ion and water adsorption technology, which is applied in the direction of adsorption of water/sewage treatment, water pollutants, water/sewage treatment, etc., to achieve the effect of high adsorption capacity and fast adsorption rate

Active Publication Date: 2018-03-30
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, after investigation, it was found that there are few reports on the use of MIL-101 and its modified materials for the ion adsorption of rubidium and cesium in solution.

Method used

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  • Application of modified MIL-101-SO3NH4 material in aspect of adsorbing rubidium and caesium ions in water
  • Application of modified MIL-101-SO3NH4 material in aspect of adsorbing rubidium and caesium ions in water
  • Application of modified MIL-101-SO3NH4 material in aspect of adsorbing rubidium and caesium ions in water

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] For material MIL-101-SO 3 Na for post-treatment: the prepared MIL-101-SO 3 Na material MIL-101-SO 3 Put Na in saturated ammonium chloride aqueous solution, stir magnetically for 7-8 hours, centrifuge, wash with water, and dry in vacuum at 120°C for 10-12 hours to obtain MIL-101-SO 3 NH 4 Material.

Embodiment 2

[0027] We chose 20mg MIL-101-SO 3 NH 4 , 10 mL of Cs at a concentration of 300 ppm + The adsorption test was carried out on the solution, and the time gradient of 1min, 5min, 10min, 30min, 60min, 360min, 720min, 1440min was selected, and the linear relationship diagram of the adsorption amount and time was made.

Embodiment 3

[0029] The prepared sample is statically adsorbed on the configured rubidium and cesium ions. During the adsorption process, according to the time change and the concentration change of the sample solution, the concentration of rubidium and cesium ions in the liquid phase is measured by atomic absorption spectrometry until the concentration in the liquid phase is no longer change (i.e. adsorption equilibrium). Determination of exchange capacity q e .

[0030] Adsorption capacity:

[0031] where C 0 , C; ion concentration measured at each time (mmol / L); V: solution volume (L); W: mass of adsorbent (g).

[0032] At room temperature, weigh 20mg MIL-101-SO 3 NH 4 Add it into a 20mL glass bottle, add 10mL of rubidium nitrate and cesium nitrate solutions with a solution concentration of 200-1200ppm, and carry out oscillation adsorption in a constant temperature oscillator at 20°C, and measure the Rb in the solution after adsorption equilibrium + 、Cs + Concentration, put int...

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PUM

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Abstract

The invention relates to application of a modified MIL-101-SO3NH4 material in the aspect of adsorbing rubidium and caesium ions in water, and belongs to the technical field of water treatment. Duringthe application, a MIL-101-SO3Na material is subjected to post treatment; the activated MIL-101-SO3Na is put into a saturated ammonium chloride water solution; after magnetic stirring is performed for7 to 8h, centrifugal separation and water washing are performed; vacuum drying is performed for 10 to 12h at 120 DEG C; the MIL-101-SO3NH4 material is obtained. Adsorption test phenomena show that the MIL-101-SO3NH4 can efficiently adsorb the rubidium and caesium ions in the water.

Description

technical field [0001] The invention belongs to the technical field of water treatment, in particular to a modified MIL-101-SO 3 NH 4 Adsorption application of materials to rubidium and cesium ions in water. Broaden the application range of MIL-101 class materials. Background technique [0002] Rubidium and cesium elements have excellent photoelectric and chemical properties, and are widely used in electronic devices, catalysts, biopharmaceuticals, magnetic fluid power generation, and thermal ion conversion. Salt lake brine contains rare precious metal resources such as rubidium and cesium, and the extraction of rubidium and cesium ions from salt lake brine has great application prospects. [0003] At present, the main methods for extracting rubidium and cesium ions are precipitation method, solvent extraction method and adsorption separation method. The unit content of rubidium and cesium ions in salt lake brine is low, and it is difficult to directly extract rubidium a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/22B01J20/30C02F1/28C02F101/20
CPCB01J20/226B01J2220/4806B01J2220/4812C02F1/285C02F2101/20
Inventor 谢亚勃杨奇王彬李建荣
Owner BEIJING UNIV OF TECH