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A kind of preparation method of magnetic responsive bentonite water treatment agent

A water treatment agent, magnetic responsive technology, applied in adsorption water/sewage treatment, chemical instruments and methods, other chemical processes, etc., can solve problems such as expensive and strong reducing agent, lack of synergistic effect, and increase in production cost. , to achieve the effect of convenient source of raw materials, easy industrialization and low production threshold

Active Publication Date: 2016-04-13
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] It can be seen that the existing technology mainly prepares Fe° bentonite by physically mixing Fe° and bentonite or adopting expensive strong reductant sodium borohydride or potassium borohydride to reduce iron salt, causing Fe° to be loosely attached to the bentonite. It is easy to fall off during the process, and the synergistic effect of the two cannot be achieved, or an expensive strong reducing agent is used, which increases the production cost and is not conducive to industrial promotion

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Embodiment 1, the preparation method of this kind of magnetic response bentonite water treatment agent, its preparation steps are:

[0022] Step 1. Prepare FeCl with a concentration of 0.5mol / L 2 4H 2 O solution 100ml;

[0023] Step 2. Weigh 2g of modified sodium bentonite and add the prepared FeCl 2 4H 2 O solution, stirred evenly, and added to the autoclave;

[0024] Step 3, first use N 2 Replace the air in the kettle, fill it with hydrogen, the pressure is 4MPa, the temperature is raised to 600°C, and the reaction time is 8h;

[0025] Step 4, washing the product obtained from the above reaction with absolute ethanol to make the pH of the washing liquid = 7-8, and drying the product under constant temperature and vacuum at a temperature of 40°C;

[0026] Step 5. Grinding the dry matter, passing through a 120-mesh sieve, and the under-sieve is the prepared iron-zero bentonite.

Embodiment 2

[0027] Embodiment two, the preparation method of this kind of magnetic response bentonite water treatment agent, its preparation steps are:

[0028] Step 1. Prepare FeSO with a concentration of 2mol / L 4 ·7H 2 O solution 100mL;

[0029] Step 2. Weigh 3g of modified calcium-based bentonite and add the prepared FeSO 4 ·7H 2 O solution, stirred evenly, and added to the autoclave;

[0030] Step 3, first use N 2 Replace the air in the kettle, fill with carbon monoxide, the pressure is 15MPa, the temperature is raised to 400°C, and the reaction time is 20h;

[0031] Step 4, wash the product obtained from the above reaction with absolute ethanol, pH = 7-8, and dry the product under constant temperature and vacuum at a temperature of 60°C;

[0032] Step 5, grind the dry matter, pass through a 120-mesh sieve, and the under-sieve is the prepared iron-zero bentonite.

Embodiment 3

[0033] Embodiment three, the preparation method of this kind of magnetic response bentonite water treatment agent, its preparation steps are:

[0034] Step 1, the preparation concentration is the Fe of 3mol / L 2 (SO 4 ) 3 Solution 100mL;

[0035] Step 2. Weigh 5g of modified lithium-based bentonite and add the prepared Fe 2 (SO 4 ) 3 In the solution, stir evenly and add to the autoclave;

[0036] Step 3, first use N 2 Replace the air in the kettle, fill it with hydrogen, the pressure is 4MPa, the temperature is raised to 750°C, and the reaction time is 18h;

[0037] Step 4, wash the obtained product with ion water three times through the above reaction, so that the pH of the washing solution is 7-8, and dry the obtained product under constant temperature and vacuum at a temperature of 40°C;

[0038] Step 5. Grinding the dry matter, passing through a 120-mesh sieve, and the under-sieve is the prepared iron-zero bentonite.

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PUM

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Abstract

The invention relates to the fields of environment friendliness and water treatment and discloses a magnetic responsiveness bentonite water treatment agent method. The method comprises the following steps: 1, preparing 100mL of Fe<2+> or Fe<3+> saline solution with the concentration of 0.1-3.0 mol / L; 2, weighing 1-5g of modified bentonite, adding the bentonite into the prepared Fe<2+> or Fe<3+> saline solution, uniformly stirring, and adding the solution into an autoclave; 3, replacing air in the autoclave by using N2, introducing hydrogen or carbon monoxide at the pressure of 1-15MPa, and raising the temperature to be 400-800 DEG C, wherein the reaction time is 2-20 hours; 4, washing the reaction product by using deionized water or absolute ethyl alcohol, so that the pH of the washing solution is 7-8, performing constant temperature vacuum drying on the obtained product at the temperature of 40-100 DEG C; and 5, grinding the dried product, allowing the product to pass through a sieve with the granularity of 120 meshes, wherein the screen underflow is the prepared iron zero bentonite. According to the method, CO / H2 serves as a reducing agent, the reaction process is simple, the raw materials are low in price and readily available, and the generated iron zero bentonite water treatment agent is low in industrial production threshold and easy for industrial popularization.

Description

technical field [0001] The invention relates to the field of environmental protection, in particular to a preparation method of a magnetically responsive bentonite water treatment agent. Background technique [0002] In the process of modern industrial production, more organic and inorganic pollution products will be produced, such as some heavy metal ions such as chlorinated hydrocarbons, polycyclic aromatic hydrocarbons, pentavalent arsenic and hexavalent chromium. These pollutants are difficult to deal with, and seriously pollute the environment and threaten human health. How to effectively and economically deal with these pollutants has always been the focus of research on water treatment in various countries. [0003] Bentonite is rich in resources, cheap, and has good dispersibility, adsorption and ion exchange, and large specific surface area. When bentonite is used in sewage treatment, it can absorb a large amount of pollutants and poisons. Especially for heavy met...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/12B01J20/30C02F1/28
Inventor 马建超马清亮张继龙徐德龙肖宇强乔晨章青芳王玲玲
Owner TAIYUAN UNIV OF TECH