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Magnetic chalcogenide composite adsorbent and application thereof

A composite adsorption and chalcogen compound technology, which is applied in the field of adsorbents and magnetic chalcogen composite adsorbents, can solve problems such as difficult water separation, and achieve high magnetic properties, good adsorption performance, and rapid separation effects

Active Publication Date: 2018-07-03
NINGBO URBAN ENVIRONMENT OBSERVATION & RES STATION NUEORS CHINESE ACADEMY OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It has been reported that chalcogen compounds have high stability and good heavy metal ion adsorption capacity in acidic water, but chalcogen compounds are generally in the form of powder, and it is not easy to separate from water after adsorption.

Method used

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  • Magnetic chalcogenide composite adsorbent and application thereof
  • Magnetic chalcogenide composite adsorbent and application thereof
  • Magnetic chalcogenide composite adsorbent and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] (1) Chalcogen compound K 2x mn x sn 3-x S 6 Preparation of:

[0025] Chalcogen K 2x mn x sn 3-x S 6 Prepared by hydrothermal method, add Sn (28.83mmol), Mn (5.77mmol), K 2 CO 3 (11.53mmol), S (69mmol) and H 2 O (15mL), hydrothermal reaction in an oven at 180°C for 100h, after cooling to room temperature, water, CS 2 and ethanol for several times, and finally dried in a vacuum oven at 60°C before use.

[0026] (2) Nano Fe 3 o 4 preparation

[0027] First, 1.35g of FeCl 3 ·6H 2 O and 40mL ethylene glycol were mixed and stirred into a homogeneous liquid, then 1g polyethylene glycol and 3.6g ammonium acetate were added, then fully stirred and mixed, then transferred to a 75mL reaction kettle, reacted at 180°C for 22h, and finally mixed with absolute ethanol and After washing with water, dry naturally overnight.

[0028] (3) Preparation of magnetic chalcogen composite adsorbent

[0029] 0.45g Fe 3 o 4 Mix with 120mL ethanol in a 250mL three-necked flask, ...

Embodiment 2

[0031] (1) Chalcogen compound K 2x mn x sn 3-x S 6 Preparation of:

[0032] Chalcogen K 2x mn x sn 3-x S 6 Prepared by hydrothermal method, add Sn (23mmol), Mn (11.53mmol), K 2 CO 3 (11.53mmol), S (69mmol) and H 2 O (15mL), hydrothermal reaction in an oven at 190°C for 96h, after cooling to room temperature, water, CS 2 and ethanol for several times, and finally dried in a vacuum oven at 60°C before use.

[0033] (2) Nano Fe 3 o 4 preparation

[0034] First, 1.5g of FeCl 3 ·6H 2 O and 80mL of ethylene glycol were mixed and stirred to form a homogeneous liquid, then 1g of polyethylene glycol and 4g of ammonium acetate were added, then fully stirred and mixed, then transferred to an 80mL reaction kettle, reacted at 200°C for 20h, and finally mixed with absolute ethanol and water Let dry overnight after washing.

[0035] (3) Preparation of magnetic chalcogen composite adsorbent

[0036] 0.225g Fe 3 o 4 Mix with 120mL ethanol in a 250mL three-necked flask, stir...

Embodiment 3

[0038] (1) Chalcogen compound K 2x mn x sn 3-x S 6 Preparation of:

[0039] Chalcogen K 2x mn x sn 3-x S 6 Prepared by hydrothermal method, add Sn (23.6mmol), Mn (10.9mmol), K 2 CO 3 (21.9mmol), S (69mmol) and H 2 O (15mL), hydrothermally reacted in an oven at 200°C for 94h, after cooling to room temperature, water, CS 2 and ethanol for several times, and finally dried in a vacuum oven at 60°C before use.

[0040] (2) Nano Fe 3 o 4 preparation

[0041] First, 2.8g of FeCl 3 ·6H 2 O and 80mL ethylene glycol were mixed and stirred into a homogeneous liquid, then 2g polyethylene glycol and 6.4g ammonium acetate were added, then fully stirred and mixed, then transferred to a 150mL reactor, reacted at 210°C for 18h, and finally mixed with absolute ethanol and After washing with water, dry naturally overnight.

[0042] (3) Preparation of magnetic chalcogen composite adsorbent

[0043] 0.18g Fe 3 o 4 Mix with 120mL ethanol in a 250mL three-necked flask, stir mecha...

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Abstract

The invention relates to a magnetic chalcogenide composite adsorbent, belonging to the field of environmental protection. The magnetic chalcogenide composite adsorbent is a composite of nano-Fe3O4 particles and K2xMnxSn3-xS6, K2xMnxSn3-xS6 has relatively good stability and large adsorption capacity in an acidic water body, and the nano-Fe3O4 particles are easy to prepare and good in magnetic separation capacity, so that the adsorbent prepared from the nano-Fe3O4 particles and K2xMnxSn3-xS6 through compositing simultaneously has magnetic separation capacity and adsorptive property. By simulating adsorption experiments of copper ions, lead ions and cadmium ions in wastewater through the magnetic chalcogenide composite adsorbent, the theoretical adsorption amounts of copper ions, lead ions and cadmium ions are respectively 92.7mg / g-126.5mg / g, 196.1mg / g-262.3mg / g and 188.6mg / g-264.2mg / g, and the saturation magnetization strengths after adsorption are respectively 15.6emu / g-77.2emu / g, 14.7emu / g-75.1emu / g and 14.6emu / g-76.2emu / g.

Description

technical field [0001] The invention relates to an adsorbent, in particular to a magnetic chalcogen composite adsorbent, which belongs to the field of environmental protection. Background technique [0002] With the rapid development of industrial production, heavy metal pollution in water is becoming more and more serious. Unlike organic pollutants, heavy metals cannot be biodegraded and easily accumulate in aquatic organisms, and endanger human health through the food chain. Therefore, the treatment of heavy metal wastewater is related to the health of the water environment and human health. At present, the main heavy metal wastewater treatment methods include ion exchange method, adsorption method, chemical precipitation method, membrane filtration method, biological method and so on. Among them, the adsorption method has the advantages of low cost, good treatment effect, and simple operation, and is currently recognized as an effective method for treating heavy metal wa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/06B01J20/28B01J20/30C02F1/28C02F101/20
CPCB01J20/045B01J20/06B01J20/28009C02F1/281C02F1/288C02F2101/20C02F2305/08
Inventor 李建荣肖航
Owner NINGBO URBAN ENVIRONMENT OBSERVATION & RES STATION NUEORS CHINESE ACADEMY OF SCI