Magnesium-aluminum double-metal hydroxide loaded ferrous sulfide composite material as well as preparation method and application thereof

A hydroxide, composite material technology, applied in chemical instruments and methods, water pollutants, other chemical processes, etc., can solve problems such as poor removal of low-concentration mercury, achieve inhibition of precipitation, wide application prospects, and achieve solid-liquid separation effect

Active Publication Date: 2020-11-24
JINAN UNIVERSITY
View PDF3 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Researchers from the School of Environmental Science and Engineering of Shanghai Jiaotong University used SnS 4 4- Modified magnesium-aluminum layered double hydroxides for the removal of mercury from acid mine wastewater, the study found that the removal rate of mercury was >99% under strong

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
  • Magnesium-aluminum double-metal hydroxide loaded ferrous sulfide composite material as well as preparation method and application thereof
  • Magnesium-aluminum double-metal hydroxide loaded ferrous sulfide composite material as well as preparation method and application thereof
  • Magnesium-aluminum double-metal hydroxide loaded ferrous sulfide composite material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Example 1: FeS@Mg 2 Preparation of Al-LDH composites

[0047] (1) Magnesium aluminum double metal hydroxide (Mg 2 Al-LDH) material preparation: 12.07g AlCl 3 ·6H 2 O was dissolved in 500mL deionized water under magnetic stirring to obtain solution A, and 20.33g MgCl 2 ·6H 2 O was dissolved in 500mL deionized water under magnetic stirring to obtain solution B. After mixing solution A and solution B, magnetically stirred at room temperature for 30min, and added 80mL of ammonia water to adjust the pH value of the mixed solution to 10 to form a white colloid. After 60 minutes, the white colloid was centrifuged and washed with deionized water, and dried in an oven at 80°C for 24 hours to obtain Mg 2 Al-LDH material is spare.

[0048] (2) FeS@Mg 2 Preparation of Al-LDH composites: under the conditions of magnetic stirring and nitrogen protection, 1.58gFeSO 4 ·7H 2 O was dissolved in 485mL deionized water, and then 0.5g Mg 2 Al-LDH was added therein, and the magnetic...

Embodiment 2

[0050] Example 2FeS@Mg 2 Preparation of Al-LDH composites

[0051] Step (1) preparation method is with embodiment 1, makes Mg 2 Al-LDH material spare;

[0052] With the Mg in the embodiment 1 step (2) 2 Change the quality of Al-LDH to 0.25g, and other conditions are the same, get FeS@Mg 2 Al-LDH composites with FeS and Mg 2 The mass ratio of Al-LDH is 1:05;

[0053] With the Mg in the embodiment 1 step (2) 2 Change the quality of Al-LDH to 1g, and other conditions are the same, get FeS@Mg 2 Al-LDH composites with FeS and Mg 2 The mass ratio of Al-LDH is 1:2;

[0054] With the Mg in the embodiment 1 step (2) 2 Change the quality of Al-LDH to 2g, and other conditions are the same, get FeS@Mg 2 Al-LDH composites with FeS and Mg 2 The mass ratio of Al-LDH is 1:4;

[0055] With the Mg in the embodiment 1 step (2) 2 The quality of Al-LDH is changed to 4.4g, and other conditions are the same, FeS@Mg is obtained 2 Al-LDH composites with FeS and Mg 2 The mass ratio of Al...

Embodiment 3

[0058] Example 3FeS@Mg 2 Mercury removal from surface water by Al-LDH composites under anaerobic conditions

[0059] The FeS of comparative example 1, the Mg of embodiment 1 were respectively 2 Al-LDH and FeS@Mg with different mass ratios 2 Al-LDH composite material (prepared in Example 1 and 2) is used to remove surface water under anaerobic conditions, wherein FeS, Mg 2 Al-LDH and FeS@Mg 2 The concentration of Al-LDH composite material in the surface water to be treated is 20mg / L, the concentration of mercury in the surface water to be treated is 100μg / L, the pH value of the surface water to be treated is 7.0, and the removal time is 72 hours. The removal effect is shown in Figure 5 .

[0060] Figure 5 In order to compare different FeS and Mg 2 Mass ratio of Al-LDH to FeS@Mg 2 Effect of Al-LDH composites on mercury removal in surface water. With Mg 2 As the mass ratio of Al-LDH increases, the removal of mercury by the composite material shows a trend of first incr...

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 magnesium-aluminum double-metal hydroxide loaded ferrous sulfide composite material as well as a preparation method and an application thereof. The preparation method comprises the following steps: by taking magnesium-aluminum layered double-metal hydroxide as a carrier of the composite material, firstly mixing a ferrous sulfate solution with Mg2Al-LDH, then dropwise adding a sodium sulfide solution into a reaction system, and carrying out standing, centrifuging, washing and drying on an obtained turbid liquid under an anaerobic condition, thereby obtaining the FeS@Mg2Al-LDH composite material. According to the composite material, agglomeration of FeS particles is effectively inhibited, the synergistic effect of the FeS material and the Mg2Al-LDH material is achieved, the acid and alkali resistance and oxidation resistance of the material are improved, the treatment effect on mercury in a water body is improved, and the composite material has wide applicationprospects in environmental remediation.

Description

technical field [0001] The invention belongs to the technical field of environmental functional materials and water treatment, and specifically relates to a magnesium-aluminum double metal hydroxide-loaded ferrous sulfide composite material and a preparation method and application thereof. Background technique [0002] Mercury is a common heavy metal pollutant with the characteristics of high toxicity, persistence and refractory degradation. Production processes such as coal combustion, non-ferrous metal smelting, mining, and chlor-alkali industry discharge a large amount of mercury-containing wastewater into the water system. After mercury enters the human body, it is easy to cause damage to the cardiovascular, kidney, gastrointestinal and central nervous systems, and seriously endanger human health. The removal of mercury in water has always been one of the hotspots and difficulties in environmental remediation research. [0003] Methods such as coagulation, chemical pre...

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): B01J20/08B01J20/30C02F1/28C02F101/20
CPCB01J20/041B01J20/08B01J20/0229B01J20/0266C02F1/281C02F2101/20Y02W10/37
Inventor 宫艳艳王丽娟王梦霞刘良英
Owner JINAN UNIVERSITY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap