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

Hydroxyapatite-loaded nano zero-valent iron composite material as well as preparation method and application method thereof

A nano-zero-valent iron and hydroxyapatite technology, which is applied in chemical instruments and methods, other chemical processes, and the restoration of polluted soils, can solve the problems of complex heavy metal pollution, such as difficulty in simultaneous detoxification, and achieves mild experimental operating conditions. Improve removal efficiency and strong adsorption effect

Active Publication Date: 2020-09-25
CENT SOUTH UNIV
View PDF6 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that existing materials are difficult to detoxify complex heavy metal pollution synchronously, and proposes to provide a method that can efficiently reduce hexavalent chromium and simultaneously fix and adsorb divalent metal cations through the regulation of phosphoric acid groups, hydroxyl groups, iron groups and other groups. Copper, cobalt, nickel hydroxyapatite-loaded nano-zero-valent iron composite material and its preparation method, and its application in the field of complex heavy metal polluted wastewater treatment and soil remediation

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
  • Hydroxyapatite-loaded nano zero-valent iron composite material as well as preparation method and application method thereof
  • Hydroxyapatite-loaded nano zero-valent iron composite material as well as preparation method and application method thereof
  • Hydroxyapatite-loaded nano zero-valent iron composite material as well as preparation method and application method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Prepare 30mL of 0.5mol / L calcium hydroxide solution and 30mL of 0.3mol / L ammonium dihydrogen phosphate solution (the amount of Ca / P substance=1.67), and drop the prepared ammonium dihydrogen phosphate solution at a speed of 2.5mL / min Put it into the calcium hydroxide suspension, after ultrasonication for 20 minutes, adjust the pH to 10.5 with 50% ammonia water, then transfer to a 100mL polytetrafluoroethylene liner, and react for 10 hours at a hydrothermal temperature of 180°C , after cooling, filter with suction, wash and dry to obtain nanorod-shaped hydroxyapatite. Add 2.0g of hydroxyapatite to 5g / L of polyvinylpyrrolidone (PVP) solution, keep stirring on a magnetic stirrer, and feed nitrogen for 30min, then add 0.36mol / L of ferrous sulfate With a volume of 100mL, after fully absorbing ferrous ions for 3 hours, slowly drop 1.4mol / L potassium borohydride solution into the reaction system at a rate of 1.7mL / min, and continue stirring with nitrogen gas for 1.5h. Then wa...

Embodiment 2

[0048] The composition of the synthesized hydroxyapatite (HAP) undergoes certain changes by varying the material ratio of calcium and phosphorus sources, ie, Ca / P. HAP was synthesized under the three ratios, and all had the characteristic peaks of hydroxyapatite, but the peak intensities were changed. With the change of Ca / P ratio, HAP will form certain structural defects, which will affect the stability and purity. When the Ca / P ratio is low, the system composition and crystallinity will change, and the characteristic peak of calcium hydroxide will appear around 18°. When Ca / P=2, within the range of 30-35° of its characteristic peak, it changes from 4 peaks to 3 peaks, one shoulder peak disappears, and merges with another characteristic peak to form a peak, and the characteristic peak of calcium hydroxide The peak did not appear, indicating that more calcium sources or less phosphorus sources lead to changes in the structure and crystallinity of HAP. The crystallinity first...

Embodiment 3

[0050] Use 0.2g of the material prepared in Example 1 to treat 100mL of a solution containing copper, cobalt, and nickel coexistence. The concentration of the three heavy metals is 50mg / L. Under a constant temperature shaker at 30°C, take a sample after reacting for 20min, and use inductively coupled plasma to emit The concentration of copper, cobalt and nickel in the solution after the reaction is measured by a spectrometer, and the removal rate of copper, cobalt and nickel can reach more than 99% in a short period of time.

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 hydroxyapatite-loaded nano zero-valent iron composite material as well as a preparation method and an application method thereof. The preparation method comprises the following steps: by taking hydroxyapatite subjected to hydrothermal synthesis as a carrier, adsorbing Fe<2+> for several hours, reducing ferrous iron in an inert gas atmosphere to obtain nano zero-valent iron, washing, centrifuging, and freeze-drying to obtain the hydroxyapatite-loaded nano zero-valent iron composite material. According to the method, the removal effect on hexavalent chromium is the best, high-toxicity hexavalent chromium is reduced into low-toxicity hexavalent chromium, the removal rate can reach 100%, divalent heavy metal cations such as copper, cobalt and nickel in the wastewatercan be efficiently and rapidly removed at the same time, and the removal rate is also up to about 98%. The method can be applied to removal and purification of heavy metal ions in wastewater, and canalso be used for remediation of soil polluted by various heavy metals.

Description

technical field [0001] The invention belongs to the technical field of environmental green restoration materials and their preparation and application, and relates to a hydroxyapatite-loaded nano zero-valent iron composite material and a method for its preparation and application. It is suitable for the treatment of wastewater containing copper, cobalt, nickel, hexavalent chromium and other heavy metal ions, as well as the restoration and treatment of soil polluted by these heavy metals. Background technique [0002] Hexavalent chromium, copper, cobalt, nickel and other heavy metal ions often coexist in the wastewater generated by electroplating, ore mining, metal smelting and other industries. If they are discharged randomly without treatment or if the treatment is not up to standard, it will cause serious damage to the ecological environment and human health. threat. Moreover, during the production process, heavy metals such as hexavalent chromium, copper, cobalt, and nic...

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): B01J20/04B01J20/30B09C1/08C02F1/28C02F101/20C02F101/22
CPCB01J20/02B01J20/0229B01J20/048B01J2220/42B01J2220/4806B09C1/08C02F1/281C02F2101/20C02F2101/22
Inventor 杨卫春席冬冬杨志辉张晓明廖骐石岩王海鹰李晓敏贺宇宏
Owner CENT SOUTH UNIV
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