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Magnetic zeolite, and preparation method and application thereof

A technology of magnetic zeolite and zeolite powder, applied in chemical instruments and methods, other chemical processes, alkali metal oxides/hydroxides, etc., can solve problems such as high production costs and achieve low cost effects

Inactive Publication Date: 2015-07-01
INST OF HYDROGEOLOGY & ENVIRONMENTAL GEOLOGY CHINESE ACAD OF GEOLOGICAL SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The Preparation and Characterization of Magnetic Zeolite and Its Effect on Pb 2+ In the adsorption performance, the magnetic zeolite was synthesized by wet precipitation method, and the synthesized product had no effect on Pb 2+ The equilibrium adsorption capacity of zeolite is 54.5mg / g, but less than the equilibrium adsorption capacity (66.99mg / g) of the raw material zeolite; Yuan Mingliang et al published the synthesis of magnetic X zeolite and its Performance The magnetic X-type zeolite was synthesized by hydrothermal synthesis method, and its adsorption capacity for Pb reached 196.8mg / g, but the high-cost chemical reagents used in the hydrothermal synthesis method, long-term high-temperature crystallization (100°C, 16 hours) make it expensive to produce

Method used

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  • Magnetic zeolite, and preparation method and application thereof
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  • Magnetic zeolite, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Example 1 Preparation of magnetic zeolite

[0032] Use a ball mill to grind the purchased zeolite particles for 10 minutes, pass the ground zeolite through 80 mesh and 300 mesh sieves, take the zeolite in the middle of the two sieves, soak it in a beaker with 0.1M dilute hydrochloric acid, and put it in an ultrasonic cleaner for 30 minutes. , Pour the supernatant into the waste liquid bottle, rinse the sediment with deionized water 3 times and then dry it for later use.

[0033] Take 5.0 grams of zeolite after cleaning and drying, add it to a 400mL beaker, and weigh 6.66 grams of FeCl 3 ·7H 2 O, 3.66 g FeSO 4 ·6H 2 Add O to the beaker and add 200 mL of deionized water.

[0034] Place the beaker on a magnetic stirrer with heating function, and heat it while stirring. Place the thermometer on the inner wall of the beaker with a transparent tape to monitor the temperature, heat it to 65°C, and stop heating.

[0035] Transfer the beaker to an unheated magnetic stirrer, continue sti...

Embodiment 2

[0047] Example 2 Preparation of magnetic zeolite

[0048] Use a ball mill to grind the purchased zeolite particles for 10 minutes, pass the ground zeolite through 80 mesh and 300 mesh sieves, take the zeolite in the middle of the two sieves, soak in 0.1M dilute hydrochloric acid for 1 hour, and neutralize the supernatant with calcium carbonate powder Then pour it into the sewer. Rinse the zeolite 3 times with tap water and dry it for later use.

[0049] Take 5.0 kg of cleaned and dried zeolite, add it to a 200L galvanized iron bucket or a stainless steel container, add 6.66 kg of ferric chloride heptahydrate, 3.66 kg of ferrous sulfate hexahydrate, and then add 100L of tap water.

[0050] Set up a blade stirrer on the top of the iron barrel for mixing, set up a thermometer for the temperature of the liquid in the barrel, and then heat it to 70°C on an electric furnace, and stop heating.

[0051] Continue to stir until the temperature drops below 40°C.

[0052] A pH meter is added to t...

Embodiment 3

[0063] Example 3 Using the prepared magnetic zeolite to adsorb and remove Pb in sewage 2+

[0064] Add 20mg Pb(NO 3 ) 2 , 250mL deionized water, formulated into Pb 2+ Artificial sewage with a concentration of 50 mg / L.

[0065] Add 125 mg of the magnetic zeolite prepared in Example 2 to the Erlenmeyer flask, seal it with a sealing film, and place it on a horizontal shaker for 24 hours;

[0066] Place the Erlenmeyer flask on a magnet, so that the magnetic zeolite in the flask will rapidly precipitate. Use a 15mL syringe to draw the supernatant, filter it with a 0.45 micron filter membrane, pour it into a 20mL plastic bottle, and measure Pb by ICP-AES 2+ Ion concentration.

[0067] Test result, Pb in supernatant 2+ The ion concentration is 2.51mg / L, and the removal rate is 95%.

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Abstract

The invention provides a magnetic zeolite, and a preparation method and an application thereof and particularly relates to a use method in sewage treatment and polluted-soil remediation. The magnetic zeolite consists of natural clinoptilolite, wherein the surface of the natural clinoptilolite is covered with magnetic iron powder. The magnetic zeolite has high adsorbing affinity and adsorbing capacity for heavy metals, not only can be used for remediating a water body polluted by the heavy metals, but also can be used for remediating the soil polluted by the heavy metals. The preparation method is simple in step and easy in operation, and can be used for large-scale industrial production; simultaneously, the magnetic zeolite is simple in use, high in efficiency and low in cost; and after remediation, secondary pollution can not be caused, and the safe and reliable effects are achieved.

Description

Technical field [0001] The invention belongs to the technical field of heavy metal pollution treatment, and specifically relates to a magnetic zeolite used for repairing heavy metal polluted soil or water and a preparation method thereof. Background technique [0002] At present, my country's soil and water are seriously polluted by heavy metals. The cadmium rice problem caused by cadmium pollution in farmland in Hunan, Jiangxi, Guangdong and other provinces has caused serious economic and social problems. The control of heavy metal pollution in my country is urgent. [0003] The heavy metals in soil and water mainly come from sewage and sludge produced in the process of mining and smelting. Cd 2+ And Pb 2+ , Zn 2+ , Cu 2+ Divalent heavy metal ions are the most widespread. [0004] The heavy metals in the soil cannot be degraded and are difficult to remove. They have the characteristics of concealment, long-term and accumulation. At present, the methods for remediation of heavy meta...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/18B01J20/28B01J20/30C02F1/28C02F1/62B09C1/00
Inventor 吕晓立韩占涛宋乐孔祥科马春晓张威
Owner INST OF HYDROGEOLOGY & ENVIRONMENTAL GEOLOGY CHINESE ACAD OF GEOLOGICAL SCI
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