Preparation method and application of iron carbide/manganese cross-linked sodium alginate composite material

A technology of sodium alginate and composite materials, applied in the field of environmental governance, can solve the problems of low adsorption performance, high price, difficult preparation process, etc., and achieve the effect of realizing toxicity, reducing toxicity, and fast and efficient adsorption

Active Publication Date: 2021-09-17
SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
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  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0003]The existing composite materials used for adsorption are not easy to achieve effective combination with heavy metal ions, the preparation process is cumbersome, the adsorption performance is relatively low, and the price is relatively expensive. Applications in the field of heavy metal adsorption are limited

Method used

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  • Preparation method and application of iron carbide/manganese cross-linked sodium alginate composite material
  • Preparation method and application of iron carbide/manganese cross-linked sodium alginate composite material
  • Preparation method and application of iron carbide/manganese cross-linked sodium alginate composite material

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preparation example Construction

[0026] The embodiment of the present invention provides a preparation method of iron carbide / manganese cross-linked sodium alginate composite material, comprising the following steps:

[0027] S1, in 2wt% sodium alginate aqueous solution, drip iron (II) salt solution and / or manganese (II) salt solution, generate iron / manganese cross-linked sodium alginate by cross-linking reaction, wash and collect microspherical particles, and dry;

[0028] S2. After sintering and carbonizing the dried sodium alginate in step S1 at 300-900°C for 1-4h under protective gas, cooling, washing, drying, grinding, and sieving to obtain the iron carbide / manganese cross-linked alginic acid Sodium composite.

[0029] In the above technical scheme, the iron / manganese cross-linked sodium alginate obtained through step S1 is in the form of microspherical particles, which is not conducive to effective combination with heavy metal ions due to its smooth surface. The sintering and carbonization treatment o...

Embodiment 1

[0042] Dissolve 3g of sodium alginate in 150mL of distilled water at 60°C (a drop of acetic acid solution can be added dropwise during the dissolution process to assist the dissolution of sodium alginate). At the same time configure 100mmol 150mL MnSO 4 The solution was fully stirred for 2h, and the configured 2wt% sodium alginate solution was added dropwise to the MnSO 4 In solution, microspherical particles are rapidly formed. The prepared microspherical particles were washed three times with deionized water, dried in an oven at 80° C., and the microspherical particles were collected.

[0043] Place the obtained microspherical particles in a porcelain crucible, react in a vacuum muffle furnace filled with nitrogen at 600°C for 2 hours, cool to room temperature, grind the microspherical composite carbonized particles with an agate mortar, and ball mill at a speed of 220rpm with a ball mill After 15 minutes, the recovered powder was passed through a 60-mesh sieve to obtain a...

Embodiment 2

[0045] Dissolve 3g of sodium alginate in 150mL of distilled water at 60°C (a drop of acetic acid solution can be added dropwise during the dissolution process to assist the dissolution of sodium alginate). At the same time configure 100mmol 150mL MnCl 2 The solution was fully stirred for 2h, and the configured 2wt% sodium alginate solution was added dropwise to the MnCl 2 solution, and rapidly formed microspherical particles. The prepared microspherical particles were washed three times with deionized water, dried in an oven at 80° C., and the microspherical particles were collected.

[0046]Place the obtained microspherical particles in a porcelain crucible, react in a vacuum muffle furnace filled with nitrogen at 600°C for 2 hours, cool to room temperature, grind the microspherical composite carbonized particles with an agate mortar, and ball mill at a speed of 220rpm with a ball mill After 15 minutes, the recovered powder was passed through a 60-mesh sieve to obtain a man...

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Abstract

The invention discloses a preparation method and application of an iron carbide / manganese cross-linked sodium alginate composite material, and the preparation method comprises the following steps: s1, dropwise adding an iron (II) salt solution and / or a manganese (II) salt solution into a 2wt% sodium alginate aqueous solution, generating iron / manganese cross-linked sodium alginate through a cross-linking reaction, washing, collecting microspherical particles, and drying; and s2, sintering and carbonizing the dried sodium alginate in the step s1 at 300-900 DEG C under protective gas for 1-4 hours, washing, drying, grinding and sieving to obtain the iron carbide / manganese cross-linked sodium alginate composite material. The iron carbide / manganese cross-linked sodium alginate composite material disclosed by the invention can be used for simultaneously reducing and removing the toxicity of heavy metals, retaining phosphorus and adsorbing the heavy metals by photocatalytic reduction.

Description

technical field [0001] The invention relates to the field of environmental treatment, in particular to a preparation method and application of an iron carbide / manganese crosslinked sodium alginate composite material. Background technique [0002] With the advancement of industrialization, heavy metal pollution in the water environment and soil environment has become increasingly serious, seriously threatening human health and ecological development. Develop fast and efficient heavy metal adsorbents to adsorb heavy metal ions, realize efficient and fast adsorption of heavy metal ions, and reduce heavy metal ions in water to the limit value of relevant national water quality standards (such as As is 0.05mg / L), which is beneficial to the water environment and soil environment sustainable development is crucial. [0003] The existing composite materials for adsorption are not easy to achieve effective combination with heavy metal ions, the preparation process is cumbersome, the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/28B01J20/30C02F1/28C02F1/70C01B32/05C01B32/914C02F101/10C02F101/20C02F101/22
CPCB01J20/20B01J20/0229B01J20/0222B01J20/28059C02F1/288C02F1/70C01B32/914C01B32/05C01P2002/72C01P2002/82C01P2004/03C02F2101/103C02F2101/105C02F2101/20C02F2101/22Y02W10/37
Inventor 管运涛毛伟张慧旻
Owner SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
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