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

Method for controlling carbon nanotubes to selectively adsorb cu2+, pb2+ and zn2+ from wastewater

A technology of carbon nanotubes and magnetic carbon nanotubes, applied in chemical instruments and methods, adsorption of water/sewage treatment, water pollutants, etc., can solve the problems of inability to achieve selective adsorption, and achieve the promotion of adsorption rate and adsorption capacity, The effect of short cycle time and low water consumption

Active Publication Date: 2022-06-24
NORTHWEST RES INST OF MINING & METALLURGY INST
View PDF16 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the increasing pollution of heavy metals and the consumption of non-ferrous metals, the recovery and reuse of heavy non-ferrous metals is imminent. The existing high-efficiency adsorbents can be used as a potential pollutant, but the existing carbon nanotube adsorption technology cannot achieve selective adsorption

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 controlling carbon nanotubes to selectively adsorb cu2+, pb2+ and zn2+ from wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Embodiment 1, a kind of regulation carbon nanotube selectively adsorbs Cu from waste water 2+ , Pb 2+ , Zn 2+ The method includes the following steps: (1) Preparation of magnetic carbon nanotubes: firstly, the nanotubes are mixed with concentrated H 2 SO 4 , concentrated HNO 3 The mixed solution is put into the reactor according to the ratio of solid-liquid ratio of 1:20-40 g / mL, and then ultrasonically treated for 20-40 min to make it completely mixed; React for 3-3.5h under the conditions of 200-250 r / min, and then magnetize for 20-40 min in a vertical magnetic field with a magnetic induction intensity of 2.8-3.2T, dilute it by 5-8 times and let it stand for 6-8 h, remove the supernatant. Clear liquid; use a filter device to separate the mixture from solid and liquid, and rinse the carbon nanotubes until the filtrate is neutral, and finally rinse it with absolute ethanol for 2-3 times; Under the conditions of vacuum drying for 5-8 h, the multi-walled carbon nanot...

Embodiment 2

[0026] Example 2, according to the regulation of carbon nanotubes described in Example 1, selective adsorption of Cu from wastewater 2+ , Pb 2+ , Zn 2+ In the method: the concentrated H in the step (1) 2 SO 4 and concentrated HNO 3 The volume ratio is 3:1.

Embodiment 3

[0027] Example 3, according to the regulation of carbon nanotubes described in Example 1 or 2, selective adsorption of Cu from wastewater 2+ , Pb 2+ , Zn 2 + The method: the nanotubes in the step (1) are mixed with concentrated H 2 SO 4 , concentrated HNO 3 The mixed solution was put into the reactor with a solid-liquid ratio of 1:30 g / mL, and the ultrasonic treatment time was 30 min.

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 discloses a method for regulating and controlling carbon nanotubes to selectively adsorb Cu from wastewater. 2+ , Pb 2+ , Zn 2+ According to the difference in ion magnetism, the thickness of the chemical hydration layer and the size of water molecule clusters are controlled by affecting the size of the ion magnetic energy to achieve the goal of selective adsorption. After the wastewater is treated with a gradient magnetic field, magnetic carbon nanotubes are added to inhibit Its to Cu 2+ The adsorption of carbon nanotubes increases the Pb 2+ and Zn 2+ This technology is also applicable to the separation of ions with different magnetic properties, which can greatly promote the adsorption of carbon nanotubes to target ions, and has a high ion separation coefficient. The invention is convenient and fast, and the carbon nanotubes that have been adsorbed can be reused after being desorbed, and the cost is low. At the same time, the preparation of magnetic carbon nanotubes by magnetization treatment can greatly shorten the preparation period.

Description

technical field [0001] The present invention is a method of regulating carbon nanotubes to selectively adsorb Cu from wastewater 2+ , Pb 2+ , Zn 2+ The method is used to improve the adsorption capacity and adsorption speed of carbon nanotubes for target ions. Background technique [0002] In recent years, carbon nanotubes, as a new type of carbon material, have attracted widespread attention because of their unique one-dimensional tubular microstructure characteristics. The multi-walled carbon nanotubes prepared by catalytic cracking make them have excellent adsorption properties. The tube has a large specific surface area and high surface activity. With the increasing pollution of heavy metals and the consumption of non-ferrous metals, the recovery and reuse of heavy non-ferrous metals is imminent. The existing ones can be used as high-efficiency adsorbents for potential pollutants, but the existing carbon nanotube adsorption technology cannot achieve selective adsorpti...

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): C02F9/10C02F1/28C02F1/48C02F1/04C02F1/36C02F101/20
CPCC02F9/00C02F1/283C02F1/48C02F1/04C02F1/36C02F2101/20C02F2209/02C02F2209/44C02F2303/26
Inventor 姚夏妍王源瑞后洁琼牛永胜刘静静鲁兴武程亮李俞良李银丽
Owner NORTHWEST RES INST OF MINING & METALLURGY INST