Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method for treating doxycycline waste water with iron-modified attapulgite adsorbent

A technology of attapulgite and doxycycline, which is applied in the directions of adsorption water/sewage treatment, separation method, water/sewage treatment, etc., to achieve the effects of high regeneration efficiency, easy promotion and low cost

Inactive Publication Date: 2012-07-04
BEIJING NORMAL UNIVERSITY
View PDF2 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current literature has reported that attapulgite can remove COD from sewage, the removal rate can be as high as 90%, some even reach 100%, and the regeneration rate is high, and it can be reused, but the application of attapulgite to doxycycline Adsorption and removal of compounds has not been reported

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for treating doxycycline waste water with iron-modified attapulgite adsorbent
  • Method for treating doxycycline waste water with iron-modified attapulgite adsorbent
  • Method for treating doxycycline waste water with iron-modified attapulgite adsorbent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Weigh 5g of purified attapulgite into a 500mL beaker, add 250mL of distilled water, and after magnetic stirring for 0.5h, add 0.724g of FeCl 3 ·6H 2 O (equivalent to 0.15gFe), magnetic stirring for 30min, to ensure FeCl 3 ·6H 2 O is completely dissolved, adjust the pH value=7, continue to stir for 1h, centrifuge and wash 3 times, then dry at 40℃ for 36-48h, and grind to a particle size ≤100 mesh to prepare iron-modified attapulgite adsorbent.

[0049] Accurately weigh 0.1000g (±0.0005g) of iron-modified attapulgite adsorbent, put it in a 250mL conical flask with stopper, add 20mL doxycycline solution with a concentration of 100mg / L, and place it in a constant temperature oscillator Inside, oscillate at a rate of 150r / min at a temperature of 25℃. Take the supernatant and pass it through a 0.45μm microporous membrane at 1h, 3h, 6h, 12h, and 24h, and test the residual doxycycline concentration by liquid chromatography. Three parallels are set for each group of experiments, and...

Embodiment 2

[0052] As in Example 1, an iron-modified attapulgite adsorbent was prepared.

[0053] Accurately weigh 0.1000g (±0.0005g) of iron-modified attapulgite adsorbent, put it in a 250mL conical flask with stopper, and add 20mL of doxycycline solution with concentrations of 10, 20, 50, 100 mg / L, respectively Place it in a constant temperature oscillator and oscillate at a rate of 150r / min at 25°C for 24 hours to reach adsorption equilibrium. Take the supernatant and pass it through a 0.45μm microporous membrane. Use liquid chromatography to test the concentration of residual doxycycline. Three parallels are set for each group of experiments, and the results are expressed as the arithmetic mean, and the standard deviation is calculated to ensure the test accuracy. After calculation, the adsorption removal rate of doxycycline was 99.9%, 99.2%, 99.6%, and 99.4%, respectively. Attached figure 2 , The effect of initial concentration of doxycycline on adsorption removal rate.

[0054] It can...

Embodiment 3

[0056] As in Example 1, an iron-modified attapulgite adsorbent was prepared.

[0057] Accurately weigh 0.1000g (±0.0005g) of iron-modified attapulgite adsorbent, put it in a 250mL conical flask with stopper, add 20mL doxycycline solution with a concentration of 100mg / L, and place it in a constant temperature oscillator In the inside, oscillate at a rate of 150r / min at 5, 15, 25, and 40°C for 24 hours to reach adsorption equilibrium, take the supernatant through a 0.45μm microporous membrane, and use liquid chromatography to test the concentration of residual doxycycline. Three parallels are set for each group of experiments, and the results are expressed as the arithmetic mean, and the standard deviation is calculated to ensure the accuracy of the test. After calculation, the adsorption removal rate of doxycycline was 99.1%, 99.3%, 99.4%, and 99.8%, respectively. Attached image 3 , The effect of temperature on adsorption removal rate.

[0058] It can be seen that the adsorption ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a method for treating doxycycline waste water with an iron-modified attapulgite adsorbent, which is characterized in that concentration of doxycycline in the waste water is 5-150mg / L. The iron-modified attapulgite adsorbent is added in the doxycycline waste water, and mass ratio of the doxycycline waste water to the adsorbent is 1: (4-6). The adsorption process adopts a static mode of action and / or an oscillating and stirring mode of action at the temperature of 0-50 DEG C. The method aims at the waste water polluted by doxycycline and removes doxycycline by adding the iron-modified attapulgite adsorbent in the waste water for adsorption. The method has the advantages of having high adsorption efficiency for doxycycline compounds, simple operational process, low requirements for adsorption conditions, low cost of adsorption materials and high regeneration efficiency and being easy to popularize. The method is used for removing doxycycline compounds in a water body and has good economic and environmental benefits.

Description

Technical field [0001] The invention relates to an adsorption treatment method for doxycycline compounds in wastewater, in particular to a method for adsorbing and removing doxycycline compounds in medical sewage by using iron-modified attapulgite adsorbent. Background technique [0002] Tetracycline antibiotics (TCs, hereinafter referred to as tetracyclines) are a class of broad-spectrum antibiotics produced by Streptomyces, with high frequency of use and a wide range. According to reports, the production and use of such antibiotics rank second in the world, and China ranks first. Tetracyclines include natural tetracyclines and semi-synthetic tetracyclines. Natural tetracyclines are extracted from the culture broth of Streptomyces. Doxycycline (also known as doxycycline and doxycycline) is a semi-synthetic tetracycline. Kind of. It is made from oxytetracycline as a raw material after chlorination, dehydration, hydrogenation to salt and replacement and other chemical reactions,...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C02F1/28C02F1/58B01J20/12B01J20/30B01J20/34
Inventor 王金生李剑鲍文菊
Owner BEIJING NORMAL UNIVERSITY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com