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Method for preparing rectorite self-assembled bismuth vanadate water treatment agent

A water treatment agent, self-assembly technology, applied in the direction of energy wastewater treatment, water/sewage treatment, botanical equipment and methods, etc., can solve problems such as unfavorable sustainable development, achieve good application prospects, strong adsorption capacity, and improve dispersion sexual effect

Inactive Publication Date: 2011-11-23
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The methods currently used to treat wastewater mainly include: physical separation, biodegradation, and chemical decomposition, but these methods have certain limitations and are not conducive to sustainable development.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] (1) Add bismuth nitrate and disodium ethylenediaminetetraacetic acid to the phosphate buffer, stir for 15 minutes to form a suspension; dissolve sodium metavanadate in the phosphate buffer, and add dropwise to the In the suspension, a transparent solution is formed; the molar ratio of bismuth salt, stabilizer and metaaluminate is 0.01:0.01:0.01, and the phosphate buffer is made up of 0.025mol / L sodium dihydrogen phosphate solution and 0.05mol / Composition of L sodium hydrogen phosphate solution;

[0021] (2) Adjust the pH of the above transparent solution to 4.5 with a sodium hydroxide aqueous solution with a concentration of 0.5 mol / L, then add rectorite at 20°C, stir, reflux for 6 hours, and filter to obtain a yellow product, and finally the resulting product Bake at 150°C for 2 hours, and the weight ratio of bismuth salt to rectorite is 1:5.

Embodiment 2

[0023] (1) Add bismuth carbonate and sodium gluconate to the phosphate buffer, stir for 35 minutes to form a suspension; dissolve ammonium metavanadate in the phosphate buffer, and add dropwise to the suspension , Forming a transparent solution; wherein the molar ratio of bismuth salt, stabilizer and metaaluminate is 0.06:0.04:0.01, and the phosphate buffer is composed of 0.03mol / L sodium dihydrogen phosphate solution and 0.08mol / L sodium hydrogen phosphate Solution composition

[0024] (2) Adjust the pH of the above transparent solution to 7 with a potassium hydroxide aqueous solution with a concentration of 1mol / L, then add rectorite at 80°C, stir, reflux for 15h, and filter to obtain a yellow product, and finally Bake at 210°C for 3 hours, and the weight ratio of bismuth salt to rectorite is 1:14.

Embodiment 3

[0026] (1) Add bismuth acetate and butane tetracarboxylic acid to the phosphate buffer and stir for 60 minutes to form a suspension; dissolve sodium metavanadate in the phosphate buffer and add dropwise to the suspension In the liquid, a transparent solution is formed; the molar ratio of bismuth salt, stabilizer and metaaluminate is 0.15:0.05:0.15, and the phosphate buffer is made up of 0.05mol / L sodium dihydrogen phosphate solution and 0.1mol / L phosphoric acid Sodium hydrogen composition solution;

[0027] (2) Adjust the pH of the above transparent solution to 9 with a sodium hydroxide aqueous solution with a concentration of 1.5mol / L, then add rectorite at 100°C, stir, reflux for 24h, and filter to obtain a yellow product, and finally the resulting product Bake at 280°C for 4 hours, and the weight ratio of bismuth salt to rectorite is 1:20.

[0028] Taking printing and dyeing wastewater as the treatment object, adding different concentrations of the water treatment agents obtain...

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Abstract

The invention relates to a method for preparing a rectorite self-assembled bismuth vanadate water treatment agent, which comprises the following steps of: (1) adding bismuth salt and a stabilizer into phosphate buffer, and stirring for 15 to 60 minutes to form suspension; and dissolving metavanadate in the phosphate buffer, and adding into the suspension to form transparent solution; and (2) regulating the pH value of the transparent solution to be between 4.5 and 9 by using alkaline solution, adding rectorite in a mass ratio of the rectorite to the bismuth salt in the step (1) of 5:1-20:1 at the temperature of between 20 and 100 DEG C, performing reflux reaction for 6 to 24 hours with stirring, and filtering and baking a product. The method is low in cost and simple; and the prepared water treatment agent is suitable for the advanced treatment of multiple kinds of wastewater, is environment-friendly, avoids secondary pollution, can overcome the defects of the conventional bismuth-based water treatment agent, has a good water treatment effect and a good application prospect, and can be recycled.

Description

Technical field [0001] The invention belongs to the field of preparation of water treatment agents, and particularly relates to a preparation method of rectorite self-assembled bismuth vanadate water treatment agent. Background technique [0002] Only about 10% of the world's water is directly used by humans. The largest share, 70% is for agriculture, and the remaining 20% ​​is for industry. China's emissions are about 20% of the world's pollution, and it only gets 5% of the world's fresh water. Therefore, solving the pollution problem has been on the agenda. In the processing of textile printing and dyeing, leather, and papermaking industries, a large number of environmentally polluting and harmful additives are used. Most of these additives are discharged in liquid form to pollute the environment. They have poor biodegradability, high toxicity, and high free formaldehyde content. The content of heavy metal ions exceeds the standard. Among them, printing and dyeing wet finis...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/22B01J20/12C02F1/30C02F1/28C02F1/58C02F1/62A01N59/16A01P1/00
CPCY02W10/37
Inventor 何瑾馨刘保江李浩
Owner DONGHUA UNIV
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