Unlock instant, AI-driven research and patent intelligence for your innovation.

Lanthanum aluminum composite metal pillared montmorillonite fluorine-removing adsorbent and preparation method thereof

A technology of pillared montmorillonite and composite metal, applied in the field of water treatment, can solve the problems of unsatisfactory fluorine removal effect, complicated preparation process, and low adsorption capacity, and achieve the advantages of reduced preparation cost, simple preparation process and low reaction temperature Effect

Inactive Publication Date: 2017-06-13
HEFEI UNIV OF TECH
View PDF5 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims to provide a lanthanum-aluminum composite metal pillared montmorillonite fluorine-removing adsorbent capable of efficiently removing fluoride ions in high-fluorine water and a preparation method thereof, so as to overcome the low adsorption capacity, complicated preparation process and difficult preparation of existing adsorbents. The disadvantages of high cost, the high cost of removing fluorine only with rare earth elements, and the unsatisfactory effect of removing fluorine with unpillared modified natural montmorillonite

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Lanthanum aluminum composite metal pillared montmorillonite fluorine-removing adsorbent and preparation method thereof
  • Lanthanum aluminum composite metal pillared montmorillonite fluorine-removing adsorbent and preparation method thereof
  • Lanthanum aluminum composite metal pillared montmorillonite fluorine-removing adsorbent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] In this example, a lanthanum-aluminum composite metal pillared montmorillonite defluoridation adsorbent was prepared according to the following steps:

[0038] (1) Weigh 10g montmorillonite and 0.4gNa 2 CO 3 Put it into a beaker, add 200mL of water to make a suspension with a mass ratio of 5wt%, stir at high speed for 2 hours, and age for 24 hours to obtain a montmorillonite suspension;

[0039] (2) Weigh a certain amount of La(NO 3 ) 3 , making 0.1mol / L La(NO 3 ) 3 Solution; Take a certain amount of aluminum chloride hydrate, make the aluminum chloride solution of 0.2mol / L;

[0040] Take 10mL of 0.1mol / L La(NO 3 ) 3 Mix with 100mL of 0.2mol / L aluminum chloride solution so that the molar ratio of lanthanum to aluminum is 1:20 to obtain a lanthanum-aluminum mixed salt solution;

[0041] (3) Add 20.8mL of 0.4mol / L NaOH solution to the above-mentioned lanthanum-aluminum mixed salt solution, so that the aluminum and OH - The molar ratio is 2.4, vigorously stirred f...

Embodiment 2

[0047] The preparation of the fluorine-removing adsorbent in this embodiment is the same as in Example 1.

[0048] Weigh 0.1 g of the lanthanum-aluminum composite metal pillared montmorillonite defluoridation adsorbent of this embodiment and put it into a 250mL conical flask, add 100mL containing F - For an aqueous solution with an ion concentration of 5 mg / L, use HCl or NaOH to adjust the pH values ​​of the fluorine solution to 2, 4, 6, 8, and 10, respectively. Make 3 parallel samples for each pH, ​​and shake them in a constant temperature oscillator at 25°C for 2 hours. , speed 160r / min. Take the supernatant and filter (0.45μm microporous membrane), measure F - content, see the results figure 1 .

[0049] from figure 1 It can be seen from the figure that when the pH is in the range of 6-8, the adsorption effect of the lanthanum-aluminum composite metal pillared montmorillonite defluoridation adsorbent of this embodiment is better, and the fluorine concentration of the ef...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
particle diameteraaaaaaaaaa
Login to View More

Abstract

The invention discloses a lanthanum aluminum composite metal pillared montmorillonite fluorine-removing adsorbent and a preparation method thereof. The adsorbent comprises carrier pillared montmorillonite and active components lanthanum and aluminum. The preparation method comprises the processes of performing sodium treatment on the montmorillonite, preparing pillaring liquid, performing pillaring ageing, centrifugally washing, calcining, crushing and sieving and the like. The fluorine-removing adsorbent prepared by the preparation method has high adsorption capacity on fluorine, is easy to recycle and avoids secondary pollution; and when the fluorine-removing adsorbent is used for performing high-fluorine drinking water treatment, the fluorine concentration of the treated water reaches the national drinking water standard.

Description

technical field [0001] The invention belongs to the technical field of water treatment, and in particular relates to a fluorine-removing adsorbent which can be used to efficiently adsorb and treat high-fluorine water and a preparation method thereof. Background technique [0002] Fluorine is one of the essential trace elements for the human body. Adequate intake of fluorine can effectively prevent dental caries; but long-term drinking of high-fluorine water will affect the metabolism of elements in the body, causing dental fluorosis in mild cases, and even bone fluorosis in severe cases. People are paralyzed. my country's current sanitary standards for drinking water stipulate that the concentration limit of fluoride in water is 1.0 mg / L, and my country is one of the countries with the most serious endemic fluorosis in drinking water in the world. In North China, Northwest my country and other vast areas, especially in economically backward rural areas, the fluorine content...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/16B01J20/30C02F1/28C02F101/14C02F103/06
CPCB01J20/16B01J20/06B01J20/08C02F1/281C02F1/288C02F2101/14C02F2103/06
Inventor 王文静陈天虎徐翘胡真虎王飞鸽
Owner HEFEI UNIV OF TECH