Method for preparing waste water processing materials of organic-inorganic composite bentonite

A technology of wastewater treatment and bentonite, which is applied in the direction of adsorption of water/sewage treatment, clay products, and other household utensils, etc., can solve the problem of simultaneous adsorption of refractory organic matter and phosphate radicals that have not been studied, and achieve the goal of avoiding competitive adsorption and improving adsorption capacity Effect

Inactive Publication Date: 2005-01-26
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, at present, the preparation of inorganic-organic composite bentonite often uses surfactants and metal hydroxy to support the bentonite layer at the same time, and the metal hydroxy is converted into a metal oxide form after heat treatment, so it is generally used to adsorb and treat organic matter. , so far there is no study on the simultaneous adsorption-coagulation treatment of refractory organic matter and inorganic pollutants such as phosphate in complex sewage

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] According to the addition of CTMAB, it is 1 time of the cation exchange capacity of bentonite; Al 3+ / bentonite = 10mmol / g; OH - / Al 3+ =2.4 proportioning synthetic inorganic-organic composite bentonite IOBs 1 , and then compared with the corresponding organic soils for simultaneous adsorption of β-naphthol and phosphate.

[0017] In the CTMAB cationic surfactant solution (containing CTMAB7.72g in the solution, equivalent to 1 times of bentonite cation exchange capacity) that is dried and pulverized bentonite former soil 20g of 50 mesh sieves into 200ml, stir for 2 hours; Mix 0.8mol / LAlCl 3 250ml of the solution was added to the above suspension and stirred for 5 minutes; then 0.8mol / L Na 2 CO 3 600ml of the solution was added dropwise to the above suspension. The above experiments were carried out in a water bath at 60°C, and the product was aged at room temperature for 12 hours; after repeated washing and filtration, it was dried at 70°C, ground, and passed thr...

Embodiment 2

[0020] According to the addition of CPC, it is 1 time of the cation exchange capacity of bentonite; Al 3+ / bentonite=2.5mmol / g; OH - / Al 3+ =2.0 ratio synthetic composite bentonite IOBs 2 , and then compared with the corresponding organic soils for simultaneous adsorption of β-naphthol and phosphate.

[0021] 20g of bentonite former soil that has been dried and pulverized into 80 mesh sieves is dropped into 200ml of CPC cationic surfactant solution (containing CPC7.44g in the solution, which is equivalent to the cation exchange capacity of bentonite), and stirred for 2 hours; AlCl 3 250ml of the solution was added to the above suspension and stirred for 5 minutes; then 250ml of 0.4mol / L NaOH solution was added dropwise to the above suspension under vigorous stirring. The above experiments were all carried out in a water bath at 60°C. Aging at room temperature for 12 hours; drying at 70°C after repeated washing and filtration, grinding, and passing through a 100-mesh sieve ...

Embodiment 3

[0024] Change the amount of surfactant, according to the amount of CPC added is 0.8 times of bentonite cation exchange capacity; Al 3+ / bentonite=2.5mmol / g; OH - / Al 3+ =1.8 ratio synthetic composite bentonite IOBs 3 , and then the experiment of simultaneous adsorption of β-naphthol and phosphate was carried out.

[0025] 20g of bentonite raw soil that has been dried and crushed through a 60 mesh sieve is dropped into 200ml of CPC cationic surfactant solution (containing CPC5.96g in the solution, which is equivalent to 0.8 times the exchange capacity of bentonite), and stirred for 2 hours; AlCl 3250ml of the solution was added to the above suspension and stirred for 5 minutes; then 250ml of 0.4mol / L NaOH solution was added dropwise to the above suspension under vigorous stirring. The above experiments were all carried out in a water bath at 50°C. Aging at room temperature for 12 hours; drying at 70°C after repeated washing and filtration, grinding, and passing through a 10...

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Abstract

The invention discloses a method for preparing waste water processing materials of organic-inorganic composite bentonite which comprises, (1) disintegrating the alta-mud, passing through 100 mesh sieve, charging into the solution of cationic surface active agent, stiring 1-2 hours in water-bath, (2) charging AlCl3 solution into the suspending liquid, stirring 5-10 minutes, (3) while water-bath stirring, charging NaOH or Na2CO3 solutions into the suspending liquid, stewing for over 10 hrs at room temperature, (4) multitime washing, filtering, drying and grinding.

Description

technical field [0001] The invention relates to a preparation method of an inorganic-organic composite bentonite waste water treatment material. Background technique [0002] my country's water resources are short, and water pollution is becoming more and more serious. For example, in 2002, my country's industrial and urban domestic sewage discharges reached 20.72 billion tons and 23.23 billion tons respectively, and the total discharge of chemical oxygen demand was 13.669 million tons, of which the treatment rate of urban domestic sewage was only 22.3%. A large amount of sewage discharge leads to water pollution, especially eutrophication and serious pollution of refractory organic matter. [0003] At present, my country's industrial and urban domestic wastewater is generally mixed and then concentrated, resulting in a large amount of organic pollutants, phosphate and various other pollutants in the sewage, and the sewage treatment process is comp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/28C04B33/04
Inventor 朱利中朱润良朱建喜
Owner ZHEJIANG UNIV
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