Microwave organic modified particle bentonite/attapulgite adsorbent and preparation method thereof

A technology of attapulgite and bentonite, applied in chemical instruments and methods, adsorption water/sewage treatment, inorganic chemistry, etc., can solve the problems of secondary pollution, short ion exchange reaction time, etc., to increase strength and shorten modification time , Improve the effect of adsorption effect

Inactive Publication Date: 2014-10-01
WUHAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Research by Li Jiwu and others found that organic bentonite synthesized by microwave does not need to be stirred, and the ion exchange reaction time is short. Zhu Lizhong, Cai Weijian. Microwave synthesis of organic bentonite and its ability to adsorb organic matter in water. Chinese Environmental Scien

Method used

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  • Microwave organic modified particle bentonite/attapulgite adsorbent and preparation method thereof
  • Microwave organic modified particle bentonite/attapulgite adsorbent and preparation method thereof
  • Microwave organic modified particle bentonite/attapulgite adsorbent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A microwave organically modified granular bentonite / attapulgite adsorbent and a preparation method thereof. Its specific steps are:

[0028] Step 1, using bentonite powder and attapulgite powder as raw materials, mixing to obtain powdery bentonite / attapulgite; then adding water to the powdery bentonite / attapulgite, and mixing evenly to obtain muddy lump bentonite / attapulgite; Then, the mud-shaped bentonite / attapulgite is dried at 100-110° C. for 16-18 hours to obtain the block-shaped bentonite / attapulgite.

[0029] Among them: the mass ratio of bentonite powder:attapulgite powder is 1:(0.3~0.4); the mass ratio of powdered bentonite / attapulgite:water is 1:(1.2~1.4).

[0030] Step 2, crushing the massive bentonite / attapulgite to a particle size of 0.2-0.45mm to obtain granular bentonite / attapulgite, and then calcining the granular bentonite / attapulgite at 720-780°C for 2~ After 2.5 hours, calcined granular bentonite / attapulgite was obtained.

[0031] Step 3. Dissolve c...

Embodiment 2

[0035] A microwave organically modified granular bentonite / attapulgite adsorbent and a preparation method thereof. Its specific steps are:

[0036] Step 1, using bentonite powder and attapulgite powder as raw materials, mixing to obtain powdery bentonite / attapulgite; then adding water to the powdery bentonite / attapulgite, and mixing evenly to obtain muddy lump bentonite / attapulgite; Then, the mud-shaped bentonite / attapulgite is dried for 18-20 hours under the condition of 100-110° C. to obtain the block-shaped bentonite / attapulgite.

[0037] Among them: the mass ratio of bentonite powder:attapulgite powder is 1:(0.4~0.5); the mass ratio of powdered bentonite / attapulgite:water is 1:(1.4~1.6).

[0038] Step 2, crushing the massive bentonite / attapulgite to a particle size of 0.45~0.9mm to obtain granular bentonite / attapulgite, and then calcining the granular bentonite / attapulgite at 720~780°C for 2~ After 2.5 hours, calcined granular bentonite / attapulgite was obtained.

[0039...

Embodiment 3

[0043] A microwave organically modified granular bentonite / attapulgite adsorbent and a preparation method thereof. Its specific steps are:

[0044] Step 1, using bentonite powder and attapulgite powder as raw materials, mixing to obtain powdery bentonite / attapulgite; then adding water to the powdery bentonite / attapulgite, and mixing evenly to obtain muddy lump bentonite / attapulgite; Then, the mud-shaped bentonite / attapulgite is dried for 20-22 hours under the condition of 100-110° C. to obtain the block-shaped bentonite / attapulgite.

[0045] Among them: the mass ratio of bentonite powder:attapulgite powder is 1:(0.3~0.4); the mass ratio of powdered bentonite / attapulgite:water is 1:(1.8~2).

[0046] Step 2, crushing the massive bentonite / attapulgite to a particle size of 0.45~0.9mm to obtain granular bentonite / attapulgite, and then calcining the granular bentonite / attapulgite at 720~780°C for 2~ After 2.5 hours, calcined granular bentonite / attapulgite was obtained.

[0047] ...

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Abstract

The invention relates to a microwave organic modified particle bentonite/attapulgite adsorbent and a preparation method thereof. The technical scheme is as follows: bentonite powder and attapulgite powder are used as main raw materials and mixed at the mass ratio of 1: (0.3-0.5); the bentonite powder and the attapulgite powder, and water are uniformly mixed at the mass ratio of 1: (1.2-2), dried at the temperature of 100-110 DEG C, smashed until the particle diameters are within 0.2-0.9 mm and calcined for 2-2.5 h at the temperature of 720-780 DEG C; under the microwave condition, the mixture is modified by the hexadecyl trimethyl ammonium bromide equivalent to 25-200% of calcined particle bentonite/attapulgite to obtain the microwave organic modified particle bentonite/attapulgite adsorbent. According to the invention, the microwave organic modified particle bentonite/attapulgite adsorbent is simple in technology, short in modified time, environment-friendly and low in energy consumption; prepared microwave organic modified particle bentonite/attapulgite adsorbent is great in particle diameter, good in adsorptive performance and suitable for the treatment of wastewater containing heavy metal irons and chlorophenol.

Description

technical field [0001] The invention belongs to the technical field of adsorbents. In particular, it relates to a microwave organically modified granular bentonite / attapulgite adsorbent and a preparation method thereof. Background technique [0002] Natural clay is cheap and easy to obtain and has a large specific surface area, which has a certain adsorption capacity for inorganic and organic pollutants. Bentonite is a kind of layered natural mineral clay with rich resources and low price. It has weak adsorption ability to hydrophobic organic matter before modification. Since the basic structure of bentonite is two layers of Si-O tetrahedron sandwiching a layer of A1-O octahedron, in which Si 4+ 、Al 3+ Can be Mg 2+ , Fe 2+ , Li + and Ni 2+ Substituted by low-priced ions, the electricity price of the bentonite unit cell is not saturated, and the bentonite layer is permanently negatively charged. This negative charge is usually balanced by the exchangeable hydrated cati...

Claims

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Application Information

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IPC IPC(8): B01J20/22B01J20/28B01J20/30C02F1/28C02F1/58
Inventor 刘红秦雄阮霞范先媛
Owner WUHAN UNIV OF SCI & TECH
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