Preparation of modified nano-iron and application of modified nano-iron in antibiotic drug manufacture wastewater treatment

A technology of pharmaceutical wastewater and nano-iron, applied in natural water treatment, water/sewage treatment, special compound water treatment, etc., can solve problems such as easy to produce agglomeration, and achieve the effect of high reducing activity, efficient degradation and low energy consumption

Inactive Publication Date: 2016-04-20
RENMIN UNIVERSITY OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In addition, due to the magnetic attraction and intermolecular force between the nano-iron particles, it is easy to agglomerate.

Method used

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  • Preparation of modified nano-iron and application of modified nano-iron in antibiotic drug manufacture wastewater treatment
  • Preparation of modified nano-iron and application of modified nano-iron in antibiotic drug manufacture wastewater treatment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The preparation of modified nano-iron and its application in the treatment of antibiotic pharmaceutical wastewater include the following steps: under the protection of nitrogen, adding ferrous salt to ethanol aqueous solution (ethanol: water = 3:7-1:9) for surface modification Add the aqueous solution of alkali containing borohydride to the above mixture drop by drop. After the dropwise addition, continue the reaction at 15°C-35°C for 20-30min to obtain a black solid precipitation;

[0024] (2) Filter the obtained black precipitate in a 0.22 μm filter membrane, wash with deionized water and ethanol 2-3 times, centrifuge (1500-3500r / min) for 10-15min, and use a magnetic material to separate . The separated black solid is precipitated at a temperature of 20°C-60°C and vacuum-dried for 12h-48h to obtain the modified nano-iron.

Embodiment 2

[0026] The modified nano-iron in Example 1 was used for the treatment of sulfamethoxazole pharmaceutical wastewater.

[0027] The modified nano-iron in Example 1 was used for the treatment of amoxicillin pharmaceutical wastewater.

[0028] The modified nano-iron in Example 1 was used for norfloxacin pharmaceutical wastewater treatment.

[0029] The present invention selects sulfamethoxazole, amoxicillin, norfloxacin polluted wastewater as pharmaceutical wastewater evaluation index, because antibiotic wastewater such as these three kinds of drugs sulfamethoxazole, amoxicillin, norfloxacin contains a large amount of refractory organic matter , the residues in the water have a strong inhibitory effect on organisms, and if they exist in the water environment for a long time, they will pose a huge threat to the ecological environment. How to quickly and effectively degrade antibiotic drugs in wastewater is of great significance to the treatment of pharmaceutical wastewater.

Embodiment 3

[0031] Modified nano-iron is used in the treatment of antibiotic pharmaceutical wastewater, and the reduction activity evaluation test is used, as shown in the following steps:

[0032] (1) Composition of simulated antibiotic pharmaceutical wastewater: Wastewater: 100ml; sulfamethoxazole concentration 10mg / L.

[0033] Activity evaluation method: In the above-mentioned simulated sulfamethoxazole pharmaceutical wastewater, add 0.08g of modified nano-iron prepared in Example 1, after reacting for 1.0h, use a centrifuge to centrifuge the solution after reaction at a speed of 3000r / min for 10min, and After vacuum ultrafiltration with a 0.22 μm organic filter membrane, the filtrate was collected for testing.

[0034] (2) Composition of simulated antibiotic pharmaceutical wastewater: Wastewater: 100ml; the concentration of amoxicillin is 10mg / L.

[0035] Activity evaluation method: Add 0.14 g of modified nano-iron in Example 1 to the above-mentioned simulated amoxicillin drug wastew...

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Abstract

The invention discloses a preparation method of modified nano-iron and application of the modified nano-iron in antibiotic drug manufacture wastewater treatment. The modified nano-ion is prepared through a reaction solution in a microemulsion state by adopting a liquid phase reduction method. The preparation method comprises the following steps that a surface modifier is added in an ethanol water solution of ferrous salt under the nitrogen condition, and the solutions are stirred and mixed to be uniform; a prepared aqueous alkaline solution of borohydride is dropwise added into the ethanol water solution of the ferrous salt, and after dropwise adding is completed, reacting is continuously performed for 20-30 min to generate a black precipitate; the black precipitate is filtered, washed, centrifuged, separated and dried to obtain the modified nano-iron. The preparation cost of the modified nano-iron is low and lower than that of commercial nano-iron, and the operation procedure is simple; the prepared modified nano-iron is large in specific surface area, uniform in particle size, good in dispersion and high in reduction activity and can quickly and efficiently degrade pollution when the modified nano-iron is applied to antibiotic drug manufacture wastewater treatment.

Description

technical field [0001] The invention belongs to the technical field of wastewater treatment, and relates to a preparation method of modified nano-iron and its application in treating antibiotic pharmaceutical wastewater. Background technique [0002] With the rapid development of my country's pharmaceutical industry, antibiotics are currently one of the most widely used drugs, and the wastewater produced in the production process has the characteristics of high COD concentration, large chroma, high sulfate concentration, and difficult biodegradation. , many of which are refractory organics such as residual antibiotics have inhibitory effect on microorganisms. [0003] Most of the common traditional wastewater treatment processes are not efficient in removing antibiotics, and it is difficult to achieve the expected effect. At present, most traditional activated sludge sewage treatment plants mainly remove antibiotics through sludge adsorption, but only part of the antibiotics...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/52C02F103/34
CPCC02F1/5245C02F2103/343C02F2305/08
Inventor 张光明田慧芳彭猛种珊刘毓璨
Owner RENMIN UNIVERSITY OF CHINA
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