Unlock instant, AI-driven research and patent intelligence for your innovation.

A method for removing diclofenac in water by ferrite magnetic nanoparticles

A technology of magnetic nanoparticles and diclofenac, applied in separation methods, chemical instruments and methods, magnetic/electric field water/sewage treatment, etc., can solve the problems of secondary pollutants, increase energy consumption and cost, and achieve good removal effect, Large specific surface area and high activity, the effect of simple reaction conditions

Active Publication Date: 2020-08-07
SHANGHAI NORMAL UNIVERSITY
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This patent mainly uses the photocatalytic performance of nickel ferrite as a magnetic heterogeneous photo-Fenton catalyst to degrade organic pollutants in water. During the degradation process, an external ultraviolet light source is required to increase energy consumption and cost, and it is easy to generate secondary pollutants.

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
  • A method for removing diclofenac in water by ferrite magnetic nanoparticles
  • A method for removing diclofenac in water by ferrite magnetic nanoparticles
  • A method for removing diclofenac in water by ferrite magnetic nanoparticles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Nickel Ferrite (NiFe 2 o 4 ) magnetic nanoparticles to remove diclofenac in sewage

[0035]Add the diclofenac sewage water sample containing 10mg / L into the centrifuge tube, adjust the pH value of the water sample to 4±0.2 with sodium hydroxide or hydrochloric acid, and then add nickel ferrite magnetic nanoparticles at a dosage of 0.5g / L . Under the condition of room temperature, shake and react at a speed of 30 rpm for 2 hours, and after adsorption equilibrium, the nickel ferrite magnetic nanoparticles are separated by a magnet. The concentration of diclofenac in the treated water sample was analyzed by high performance liquid chromatography, and the removal rate reached 98.8%.

Embodiment 2

[0037] Manganese ferrite (MnFe 2 o 4 ) magnetic nanoparticles to remove diclofenac from surface water

[0038] With the method of embodiment 1, the difference is that the treated water sample is surface water, the adsorbent used is manganese ferrite magnetic nanoparticles, sodium hydroxide or hydrochloric acid is used to adjust the pH value of the water sample to 6 ± 0.2, and use high performance liquid chromatography The concentration of diclofenac in the treated water sample was analyzed by an instrument, and the removal rate was 93.9%.

Embodiment 3

[0040] Removal of diclofenac in drinking water by nickel ferrite magnetic nanoparticles

[0041] Using the method of Example 1, the difference is that the treated water sample is drinking water spiked water sample, the concentration of diclofenac is 1.5mg / L, the dosage of nickel ferrite magnetic nanoparticles is 0.1g / L, sodium hydroxide or The pH value of the water sample was adjusted by hydrochloric acid to 7±0.2, and the concentration of diclofenac in the treated water sample was analyzed by high performance liquid chromatography, and the removal rate was greater than 99.6%.

[0042] Through experiments and analysis tests of the present invention, when the nickel ferrite and the manganese ferrite remove diclofenac in the water sample, the reaction rate is fast, and the pH value of the water sample and the natural organic matter (humic acid concentration 0-20mg / L) are little affected, And can be reused. The specific experimental conditions are as follows:

[0043] (1) Adsor...

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

PropertyMeasurementUnit
particle diameteraaaaaaaaaa
concentrationaaaaaaaaaa
Login to View More

Abstract

The invention relates to a method for removing diclofenac in water by ferrite magnetic nanoparticles. The method is characterized by comprising the following steps: firstly, adjusting the pH value ofa to-be-treated water body and feeding the ferrite magnetic nanoparticles; secondly, stirring and uniformly mixing for carrying out adsorption reaction; thirdly, after adsorption equilibrium is reached, carrying out solid-liquid separation by adopting an external magnetic field method and removing the diclofenac in the to-be-treated water body. Compared with the prior art, the method disclosed bythe invention has the advantages that the diclofenac is adsorbed by utilizing the characteristic of large specific surface area of the ferrite magnetic nanoparticles and the removal efficiency is high; in addition, due to the magnetism of the ferrite magnetic nanoparticles, the diclofenac can be quickly separated from the water body and reused by the external magnetic field and no secondary pollution is caused. With the advantages, the ferrite magnetic nanoparticles have a board application prospect in the aspect of removing trace diclofenac pollutants in drinking water or wastewater; an effective method is provided for an enhanced removal technology of the trace diclofenac pollutants in an environmental water body.

Description

technical field [0001] The invention belongs to the technical field of environmental protection and water treatment, and relates to a method for removing diclofenac in water by ferrite magnetic nanoparticles. Background technique [0002] In recent years, pharmaceuticals and personal care products (PPCPs) as a new class of pollutants have attracted more and more attention to the environmental and ecological risks caused by them. Among them, Diclofenac (Diclofenac, referred to as DFC), as a non-steroidal anti-inflammatory drug, is widely used in pain relief, anti-arthritis, treatment of rheumatism and other diseases. Due to its extensive use, it has become one of the most frequently detected PPCPs components in the water environment. At present, diclofenac has been detected in sewage plant effluent, surface water, groundwater and even drinking water, with concentrations as high as μg / L. Due to the extremely low biodegradation efficiency of diclofenac, the traditional sewage...

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
Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/48C02F1/28B01J20/34C02F101/36
Inventor 段艳平涂耀仁曹双双蒲雅丽
Owner SHANGHAI NORMAL UNIVERSITY