Method for pretreating high-concentration pharmaceutical wastewater by using bentonite composite intercalation material

A composite intercalation and pharmaceutical wastewater technology, applied in the direction of chemical instruments and methods, adsorption water/sewage treatment, other chemical processes, etc., to achieve the effect of low technical requirements, good pretreatment effect and abundant reserves

Inactive Publication Date: 2013-12-25
SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY
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Problems solved by technology

However, there are few studies on the preparation of bentonite composite intercalation materials with organic surfactants and polymers for the treatment of pharmaceutical wastewater.

Method used

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  • Method for pretreating high-concentration pharmaceutical wastewater by using bentonite composite intercalation material

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Experimental program
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Effect test

Embodiment 1

[0028] (1) Take the COD value as 1.0-2.0×10 5 mg / L of fosfomycin sodium epoxy mother liquor wastewater, adjust the pH to 6~8.

[0029] (2) Mix the bentonite composite intercalation material with pharmaceutical wastewater at a mass volume ratio of 2.0g: 100mL.

[0030] (3) Stir for 2 hours under the condition of 200~300r / min, so that the bentonite composite intercalation material can fully absorb the organic matter in pharmaceutical wastewater.

[0031] (4) Centrifuge the treated pharmaceutical wastewater under the conditions of centrifugation speed greater than 1500r / min and centrifugation time greater than 3min. The COD removal rate of the treated pharmaceutical wastewater can reach up to 78.39%, and the adsorption capacity is 3334mg / g, reaching pretreatment Effect.

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Abstract

The invention relates to a method for pretreating high-concentration pharmaceutical wastewater by using a bentonite composite intercalation material, and relates to a method for treating the pharmaceutical wastewater. The method comprises the following steps: firstly preparing CTMAB / CPAM (Cetyl Trimethyl Ammonium Bromide / Cationic Polyacrylamide) composite modified liquid: dissolving 2 millimole of CTMAB and 0.03 grams of CPAM into 100 millilitres of distilled water, and stirring under the condition of a water bath at 40 DEG C for 20 minutes; preparing the bentonite composite intercalation material: adding 6 grams of sodium bentonite to 100 millilitres of the CTMAB / CPAM composite modified liquid; adding the bentonite composite intercalation material to the pharmaceutical waste with higher organic content, wherein the highest removal ratio of the bentonite composite intercalation material on COD (Chemical Oxygen Demand) can achieve 78.39%, the adsorption capacity is 3334 mg / g, and pretreatment effect is achieved. The bentonite composite intercalation material prepared by utilizing the sodium bentonite as a raw material and CTMAB / CPAM as a composite modifying agent is greatly enlarged in specific area and interlayer spacing and greatly enhanced in adsorption property.

Description

technical field [0001] The invention relates to a method for treating pharmaceutical wastewater, in particular to a method for pretreating high-concentration pharmaceutical wastewater with a bentonite composite intercalation material. Background technique [0002] Bentonite is a clay mineral widely distributed in nature and belongs to non-metallic minerals. China's bentonite mineral resources are very rich, and its reserves rank first in the world, accounting for 60% of the world's total. The estimated resources are more than 7 billion tons, and it is characterized by wide distribution, shallow burial, easy mining and complete varieties. [0003] With the development of science and technology, people have gradually deepened their understanding of the crystallization characteristics and physical and chemical properties of bentonite, and the use of bentonite in industrial and agricultural production and scientific research has become increasingly widespread. After years o...

Claims

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Application Information

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IPC IPC(8): C02F1/28B01J20/12B01J20/30
Inventor 邵红张志芳宁志高
Owner SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY
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