Preparation of magnesium-aluminum composite oxide modified coconut shell biomass charcoal adsorption material and application of magnesium-aluminum composite oxide modified coconut shell biomass charcoal adsorption material to removal of phosphorus in wastewater

A composite oxide and biochar technology, which is applied in the direction of adsorption of water/sewage treatment, water pollutants, and other chemical processes, can solve the problems of few reports on biomass materials, and achieve convenient raw material acquisition, convenient recycling, and good The effect of applying the foreground

Pending Publication Date: 2020-12-04
JIANGSU UNIV
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Biomass-based carbon materials can usually be obtained from abandoned agricultural and forestry crops, and have attracted widespread attention due to their easy availability and good adsorption properties. However, it is difficult to prepare biomass materials for phosphorus adsorption in water using agricultural and forestry wastes as precursors. Less reported

Method used

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  • Preparation of magnesium-aluminum composite oxide modified coconut shell biomass charcoal adsorption material and application of magnesium-aluminum composite oxide modified coconut shell biomass charcoal adsorption material to removal of phosphorus in wastewater
  • Preparation of magnesium-aluminum composite oxide modified coconut shell biomass charcoal adsorption material and application of magnesium-aluminum composite oxide modified coconut shell biomass charcoal adsorption material to removal of phosphorus in wastewater
  • Preparation of magnesium-aluminum composite oxide modified coconut shell biomass charcoal adsorption material and application of magnesium-aluminum composite oxide modified coconut shell biomass charcoal adsorption material to removal of phosphorus in wastewater

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Experimental program
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Effect test

Embodiment 1

[0030] A preparation method of magnesium-aluminum composite oxide modified coconut shell biomass carbon adsorption material, comprising the steps of:

[0031] a) Soak the crushed coconut shell in 0.2M sodium hydroxide solution, stir at 60°C for 1 hour, remove impurities, wash with deionized water, add acetic acid acidified sodium chlorite solution (5% mass fraction) Carry out decolorization treatment, then wash the decolorized biomass with deionized water, and obtain coconut shell fiber after drying;

[0032] b) According to the calculation of dissolving 1g of aluminum nitrate nonahydrate per 100mL of deionized water, soak the obtained coconut shell fiber for 5 hours, filter it, dry the obtained sample and calcinate it at 200°C for 2 hours under nitrogen to obtain alumina-coated coconut shell fiber (Al 2 o 3 / CSF);

[0033] c) According to the solid-to-liquid ratio of 0.3g:0.1g:0.05g:50mL, magnesium nitrate hexahydrate, Al 2 o 3 / CSF and hexamethylenetetramine were dissol...

Embodiment 2

[0038] A preparation method of magnesium-aluminum composite oxide modified coconut shell biomass carbon adsorption material, comprising the steps of:

[0039] a) Soak the crushed coconut shell in 0.5M sodium hydroxide solution, stir at 90°C for 4h, remove impurities, wash with deionized water, add acetic acid acidified sodium chlorite solution (5% mass fraction) Carry out decolorization treatment, then wash the decolorized biomass with deionized water, and obtain coconut shell fiber after drying;

[0040]b) Dissolve 10g of aluminum nitrate nonahydrate per 100mL of deionized water, soak the obtained coconut shell fiber for 8h, filter, dry the obtained sample and calcinate at 450°C for 6h under nitrogen to obtain alumina-coated coconut shell fiber (Al 2 o 3 / CSF);

[0041] c) According to the solid-to-liquid ratio of 0.6g:0.25g:0.2g:90mL, magnesium nitrate hexahydrate, Al 2 o 3 / CSF and hexamethylenetetramine were dissolved in deionized water. After fully stirring, the mixt...

Embodiment 3

[0046] A preparation method of magnesium-aluminum composite oxide modified coconut shell biomass carbon adsorption material, comprising the steps of:

[0047] a) Soak the crushed coconut shell in 1M sodium hydroxide solution, stir at 80°C for 3h, remove impurities, wash with deionized water, and add acetic acid acidified sodium chlorite solution (5% mass fraction) to carry out Decolorization treatment, then the decolorized biomass is washed with deionized water, and dried to obtain coconut shell fiber;

[0048] b) Dissolve 5g of aluminum nitrate nonahydrate in every 100mL of deionized water, soak the obtained coconut shell fiber for 10h and filter, dry the obtained sample and calcinate at 400°C for 4h under nitrogen to obtain alumina-coated coconut shell fiber (Al 2 o 3 / CSF);

[0049] c) According to the solid-to-liquid ratio of 0.9g:0.3g:0.5g:75mL, magnesium nitrate hexahydrate, Al 2 o 3 / CSF and hexamethylenetetramine were dissolved in deionized water, and after fully ...

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Abstract

The invention belongs to the technical field of composite materials, and relates to a preparation method of a modified biomass charcoal material, in particular to a preparation method of a magnesium-aluminum composite oxide modified coconut shell biomass charcoal adsorption material. The method comprises the following steps: soaking the crushed coconut shell in lye to remove impurities, washing the material, adding acetic acid acidified chlorous acid to decolorize, cleaning and drying to obtain coconut shell fibers; continuously soaking in an aluminum nitrate solution, filtering, drying, and calcining at 200-800 DEG C in a nitrogen atmosphere to obtain Al2O3 / CSF; dissolving magnesium nitrate hexahydrate, Al2O3 / CSF and hexamethylenetetramine in deionized water according to a solid-to-liquidratio of (0.3-1.8)g: (0.1-0.9)g: (0.05-1.0)g: (50-200)mL, reacting at 60-180 DEG C for 6-48 hours, filtering, washing, and calcining at high temperature to obtain Mg-Al / CSF. The common waste coconutshells are used as biomass resources, the product is prepared through hydrothermal and calcining methods, phosphorus in wastewater can be efficiently removed, materials can be recycled, the preparation cost is reduced to the maximum extent, and the adsorption performance is improved.

Description

technical field [0001] The invention belongs to the technical field of composite materials, and relates to a preparation method of a modified biomass carbon material, in particular to the preparation of a magnesium-aluminum composite oxide modified coconut shell biomass carbon adsorption material and the application of removing phosphorus in waste water. Background technique [0002] In recent years, with economic development and social industrial modernization, the discharge of various environmental pollutants has been increasing, especially the sharp increase in phosphorus discharge has caused serious damage to the natural water environment. At present, the commonly used wastewater phosphorus removal technologies include chemical precipitation, adsorption, ion exchange and biological methods. Simple precipitation method is difficult to remove a large number of phosphorus compounds in sewage; biological phosphorus removal treatment has limited effect; ion exchange method ha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/30C02F1/28C02F101/10
CPCB01J20/20C02F1/281C02F2101/105
Inventor 袁俊杰王纪章朱瑶邱凤仙何美莹张涛李萍萍
Owner JIANGSU UNIV
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