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Environment functional material based on nanoparticles hydrated manganese oxide and preparing method thereof

A technology of hydrated manganese oxide and functional materials, applied in chemical instruments and methods, cation exchange materials, other chemical processes, etc., can solve the problem of no strengthening effect, etc., and achieve the effect of high adsorption selectivity and adsorption capacity

Inactive Publication Date: 2008-07-23
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in related studies, the carrier only supports HMO, and the carrier itself has no strengthening effect on the adsorption process.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] (A). 169g MnSO 4 ·H 2 O was dissolved in 1L of water to obtain solution A, wherein the concentration of Mn(II) was 1mol / L;

[0022] (B). Put 200mL macroporous cation exchange resin D-001 in the adsorption column, pass solution A through the column at a flow rate of 2BV / h at 30 degrees Celsius, and make solution A contact and exchange with the resin for 2.5h, Mn(II) Cations are fully exchanged to the resin surface;

[0023] (C). The cation exchange resin loaded with Mn(II) obtained in step B is added to the NaOH mixed solution of sodium hypochlorite (activity rate chlorine 3-4%) and 2mol / L, and reacted for 24 hours at 30 degrees Celsius , stirring continuously during the reaction;

[0024] (D). Take out the resin and rinse it with distilled water until the pH value is 6-7;

[0025] (E). Bake the resin at 45 degrees Celsius for 12 hours to obtain the target functional material.

[0026] The appearance of the environmental functional material prepared by the invention...

Embodiment 2

[0028] (A). 423g MnSO 4 ·H 2 O was dissolved in 1L of water to obtain solution A, wherein the concentration of Mn(II) was 2.5mol / L;

[0029] (B). Put 200mL macroporous cation exchange resin D-001 in the adsorption column, pass solution A through the column at a flow rate of 1BV / h at 22 degrees Celsius, and contact solution A with the resin for 5h, Mn(II) cations Fully exchanged to the resin surface;

[0030] (C). The cation exchange resin loaded with Mn(II) obtained in step B is added to sodium hypochlorite (8-9% active rate chlorine) and 3mol / L NaOH mixed solution, and reacted for 18 hours at 35 degrees Celsius , stirring continuously during the reaction;

[0031] (D). Take out the resin and rinse it with distilled water until the pH value is 6-7;

[0032] (E). Bake the resin at 40 degrees Celsius for 15 hours to obtain the target functional material.

[0033] The appearance of the environmental functional material prepared by the invention is black spherical particles w...

Embodiment 3

[0035] (A). 338g MnSO 4 ·H 2 O was dissolved in 1L of water to obtain solution A, wherein the concentration of Mn(II) was 2mol / L;

[0036] (B). Put 100mL macroporous cation exchange resin D-001 in the adsorption column, pass solution A through the column at a flow rate of 1BV / h at 25 degrees Celsius, and contact solution A with the resin for 8h, Mn(II) cations Fully exchanged to the resin surface;

[0037] (C). The cation exchange resin loaded with Mn(II) obtained in step B is added to sodium hypochlorite (activation rate chlorine 6-7%) and 3mol / L NaOH mixed solution, and reacted for 32 hours at 30 degrees Celsius , stirring continuously during the reaction;

[0038] (D). Take out the resin and rinse it with distilled water until the pH value is 6-7;

[0039] (E). Bake the resin at 35 degrees Celsius for 18 hours to obtain the target functional material.

[0040] The appearance of the environmental functional material prepared by the invention is black spherical particles...

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Abstract

The invention discloses an environmental function material based on nanometer particles hydrous manganese oxide and the corresponding preparation method. The frame of the material is cation exchange resin; the appearance of the material is black spherical particle with the particle size being 0.4 to 1.5 mm, the surface area being 3 to 30 m <2> / g, and the mean pore size being 0.5 to 10 nm; the solid supported quantity of the hydrous manganese oxide is 10 to 100 mg / g resin counted by manganese. The steps of the preparation method are that: a water soluble Mn (II) salt is dissolved in water to obtain a solution A; the cation exchange resin is put into an adsorption column and the solution A is led to flow through the column to contact and exchange with the resin; the obtained cation exchange resin is added into the mixed solution of sodium hypochlorite and NaOH for reacting 12 to 48 hours, and the solution is stirred continually during the reacting process; the resin is taken out and washed by distilled water until the Ph value reaches 6 to 8; the required materials are obtained after the resin is dried. The composite material obtained by the preparation has extremely high adsorptive selectivity and adsorption capacity to heavy metals, and can reduce the concentration of common heavy metals such as Pb <2+>, Cd <2+> and Zn<2+> to the Safety Control Standard.

Description

technical field [0001] The invention relates to an environmental functional material of hydrated manganese oxide and a preparation method thereof, more specifically an environmental functional material based on nanoparticle hydrated manganese oxide and a preparation method thereof, which are used for highly selective removal of lead, zinc, Resin-based composite materials for heavy metals such as cadmium. Background technique [0002] Regarding the preparation of hydrated manganese oxides (Hydrous Manganese Oxides) and its adsorption properties to heavy metals, foreign R.Rao Gadde et al. have conducted systematic research. (Studies of heavymetal adsorption by hydrous iron and manganese oxide, Anal. Chem. 1974, 46, 2022). Hydrated manganese oxides generally exist in the form of ultrafine particles (about 0.02-10 microns in size), and when they are directly applied to a fluid system, a huge pressure drop will occur, making it difficult to directly realize industrial applicatio...

Claims

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Application Information

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IPC IPC(8): B01J20/06B01J39/08B01J39/17
Inventor 潘丙才苏庆张炜铭张全兴任洪强张庆建张庆瑞潘丙军
Owner NANJING UNIV
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