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Multifunctional water treatment agent used for treating refractory wastewater

A water treatment agent, multi-functional technology, applied in adsorption water/sewage treatment, oxidized water/sewage treatment, flocculation/sedimentation water/sewage treatment, etc. The effect of reducing COD concentration and biological toxicity, good effect and low treatment cost

Inactive Publication Date: 2013-08-14
浙江一清环保工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a new type of environmentally friendly material, bentonite has the characteristics of abundant reserves, cheap and easy to obtain, and high stability. The hydrolysis of cations often makes the surface of bentonite covered with a thin water film, so the performance of natural bentonite in dealing with pollutants is poor
At the same time, due to the negative charge of the silicon-oxygen structure itself, natural bentonite cannot effectively remove anionic pollutants in water.

Method used

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  • Multifunctional water treatment agent used for treating refractory wastewater

Examples

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Comparison scheme
Effect test

Embodiment 1

[0030] A multifunctional water treatment agent for treating refractory wastewater, which is prepared through the following steps:

[0031] (1) Bentonite modification: Weigh 1 part by weight of bentonite and pour it into 10 parts by weight of 3% cetyltrimethylammonium bromide aqueous solution, stir at room temperature for 2 hours, centrifuge, After washing, place it in a constant temperature drying oven at 50°C to dry, and grind it through a 180-mesh sieve to obtain modified bentonite;

[0032] (2) Potassium ferrate loading: put 1 part by weight of modified bentonite into 10 parts by weight of pH 7.8 and concentration of 10×10 -3 mol / L potassium ferrate aqueous solution for loading, after 48 hours to reach the saturated state, it can be obtained after natural air-drying.

[0033] The water treatment agent prepared by the above method is used for the pretreatment of landfill leachate. Add 5g / L water treatment agent to the landfill leachate to be treated. After stirring for half...

Embodiment 2

[0039] A multifunctional water treatment agent for treating refractory wastewater, which is prepared through the following steps:

[0040] (1) Bentonite modification: Weigh 1 part by weight of bentonite and pour it into 15 parts by weight of cetyltrimethylammonium chloride 10% ethanol aqueous solution with a mass percentage of 4%, and stir at room temperature for 1 hour. After centrifugation and washing, it is dried in a constant temperature oven at 50°C, and ground through a 200-mesh sieve to obtain modified bentonite;

[0041] (2) Potassium ferrate loading: put 1 part by weight of modified bentonite into 15 parts by weight of pH 7 and concentration of 12×10 -3 mol / L potassium ferrate aqueous solution for loading, after 45 hours to reach saturation, it can be obtained after natural air-drying.

[0042] The water treatment agent prepared by the above method is used for the pretreatment of landfill leachate. Add 5g / L water treatment agent to the landfill leachate to be treated. ...

Embodiment 3

[0047] A multifunctional water treatment agent for treating refractory wastewater, which is prepared through the following steps:

[0048] (1) Bentonite modification: Weigh 1 part by weight of bentonite and pour it into 20 parts by weight of 5% cetyltrimethylammonium bromide aqueous solution, stir at room temperature for 3 hours, and centrifuge. After washing, put it in microwave drying, and grind it through a 150 mesh sieve to obtain modified bentonite;

[0049] (2) Potassium ferrate loading: put 1 weight part of modified bentonite into 20 weight parts of pH 8.6 and concentration of 15×10 -3 mol / L potassium ferrate aqueous solution for loading, the loading reached saturation state after 52 hours, and it was obtained after natural air-drying.

[0050] The water treatment agent prepared by the above method is used for the advanced treatment of coking wastewater, and 2g / L of water treatment agent is added to the coking wastewater to be treated for treatment. After stirring for ...

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Abstract

The invention relates to a multifunctional water treatment agent used for treating refractory wastewater. The multifunctional water treatment agent is prepared through the following steps of: (1) modifying through bentonite, namely weighing bentonite, pouring the bentonite into an organic modifier solution with mass percent of 3-5%, stirring for 1-3 hours at room temperature, centrifuging, washing, drying and grinding the bentonite to powder so as to obtain modified bentonite; and (2) loading through potassium ferrate: pouring the modified bentonite prepared by step (1) into a potassium ferrate aqueous solution with the pH of 7-9 to be loaded, and air-drying the solution after saturating to obtain the multifunctional water treatment agent. The multifunctional water treatment agent provided by the invention integrates multiple functions, such as oxidation, adsorption, flocculation, sterilization, and the like, thereby greatly reducing the COD concentration and biotoxicity in the wastewater, improving the biodegradability of the wastewater, reducing the treatment cost and improving the emission standard-reaching rate of the refractory wastewater; and the multifunctional water treatment agent has the characteristics of being good in refractory wastewater treatment effect, free of toxic and harmful substance, low in treatment cost, environmentally-friendly, and the like, thereby being suitable for large scale industrial production.

Description

technical field [0001] The invention belongs to the field of wastewater treatment, and relates to a wastewater treatment agent, in particular to a multifunctional water treatment agent for treating refractory wastewater. Background technique [0002] With the development of the chemical industry, various types of chemical wastewater, sludge, and waste residues discharged during the production process are increasing, especially the high-concentration toxic organic wastewater that is difficult to biodegrade. The treatment method has always been a long-standing problem in the field of environmental protection. Therefore, it is an important task to protect the environment and benefit mankind to vigorously carry out research on the treatment of industrial wastewater and continuously improve wastewater treatment technology. [0003] Organic wastewater from pesticides, printing and dyeing, and chemicals all contain highly toxic and stable pollutants, which are difficult to treat wi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/28C02F1/72C02F1/50C02F1/52B01J20/12
Inventor 陈建军项海田帅慧
Owner 浙江一清环保工程有限公司
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