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Modified clinoptilolite, preparation method of modified clinoptilolite and application of modified clinoptilolite in removal of Pb ions in wastewater

A clinoptilolite, modification technology, applied in modified clinoptilolite and preparation method and in the application field of removing Pb ions in wastewater, can solve the problems of uncontrollable quality, low adsorption capacity, large composition difference, etc., and achieve reduction Solid waste generation, high adsorption capacity, high selectivity effect

Active Publication Date: 2017-07-14
洛阳健阳科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a modified clinoptilolite and its preparation method and its application in removing Pb ions in waste water, to overcome the large difference in composition, uncontrollable quality and silicon-aluminum ratio of existing natural clinoptilolite adsorbents. High (n(Si / Al)=5-6), Pb 2+ Disadvantages of low adsorption capacity

Method used

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  • Modified clinoptilolite, preparation method of modified clinoptilolite and application of modified clinoptilolite in removal of Pb ions in wastewater
  • Modified clinoptilolite, preparation method of modified clinoptilolite and application of modified clinoptilolite in removal of Pb ions in wastewater
  • Modified clinoptilolite, preparation method of modified clinoptilolite and application of modified clinoptilolite in removal of Pb ions in wastewater

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Embodiment 1

[0039] (1) Referring to the method of Example 5 in European Patent EP0681991A1, artificially synthesize clinoptilolite with a low silicon-aluminum ratio, filter and wash to pHo C was dried for later use, and detected by XRF elemental analysis, the synthesized clinoptilolite n(Si / Al)=4.1, at this time Na + The molar ratio of the total balance cation is 27%;

[0040] (2) Add 5g of synthetic clinoptilolite into 400mL 2mol / L NaCl solution, 60 o C was stirred for 2h at a speed of 300r / min. Then through solid-liquid separation, washing, 80 o C drying to get Na + Exchange modified clinoptilolite, when Na + The molar ratio of the total balance cation is 81%;

[0041] (3) Na + The modified clinoptilolite was put into the muffle furnace, and the air atmosphere was 550 o C roasting 2h, promptly obtains the clinoptilolite after final modification;

[0042] For comparison, we will label the artificially synthesized clinoptilolite with n(Si / Al)=4.1 without any modification as S1#; +...

Embodiment 2

[0057] Repeat the modification operation steps of Example 1, the difference is that the NaCl in the (2) step is replaced with NaNO 3 replace. A modified clinoptilolite was obtained.

[0058] Adsorb Pb 2+ Experimental condition is the same as embodiment 1, after modification, clinoptilolite is to Pb 2+ The adsorption capacity was 181 mg / g.

Embodiment 3

[0060] Repeat the modification operation steps of Example 1, the difference is that the NaCl in the (2) step is replaced with NaCl 2 SO 4 Instead, Na 2 SO 4 The concentration becomes 1mol / L. A modified clinoptilolite was obtained.

[0061] Adsorb Pb 2+ Experimental condition is the same as embodiment 1, after modification, clinoptilolite is to Pb 2+ The adsorption capacity was 178 mg / g.

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Abstract

The invention relates to modified clinoptilolite, a preparation method thereof and application of the modified clinoptilolite in removal of Pb ions in wastewater, and belongs to the technical field of wastewater purification. The modified clinoptilolite belongs to artificially synthesized low silicon-aluminum ratio clinoptilolite, the frame silicon-aluminum ratio n(Si / Al) is 4-4.5; and the modified clinoptilolite is subjected to Na<+> exchange and calcining modification treatment. The modified clinoptilolite prepared by the method has a Pb<2+> saturated adsorbing capacity reaching 185mg / g; under the condition of coexistence of massive other metal ions, modified clinoptilolite still shows relatively strong selective adsorption for Pb<2+>. The modification method is simple and feasible, has high adsorption capacity, strong selectivity, and can be used for greatly improving the treatment efficiency of Pb<2+> containing wastewater.

Description

technical field [0001] The invention relates to a technology in the field of wastewater treatment containing heavy metals, in particular to a modified clinoptilolite and its preparation method and its application in removing Pb ions in wastewater. Background technique [0002] With the development and progress of the economy, the heavy metal pollution of natural water bodies is becoming more and more serious. Pb is one of the typical heavy metal pollutants, and its main source is Pb-containing wastewater produced by industrial activities such as electroplating, dyestuff and battery production. In the solution environment, Pb is mainly in the form of Pb 2+ Existing in the form of phytotoxicity, it has strong biological toxicity. After entering the water body, it will accumulate and enrich in the human body, causing serious harm to human health. At present, the adsorption method is to remove Pb in solution 2+ one of the main methods. [0003] Zeolites are made from [SiO 4...

Claims

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Application Information

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IPC IPC(8): B01J20/18C01B39/02C02F1/28B01J20/30C02F101/20
CPCB01J20/186C01B39/026C02F1/281C02F2101/20
Inventor 闫文付李耀睿白璞
Owner 洛阳健阳科技有限公司
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