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Biomass-modified adsorbent for adsorbing coking wastewater, and preparation method and application thereof

A coking wastewater and biomass technology, applied in chemical instruments and methods, adsorption water/sewage treatment, and other chemical processes, can solve the problems of low adsorption capacity and complicated preparation methods, and achieve simple preparation methods, wide sources, and lighten The effect of dealing with the problem

Active Publication Date: 2015-07-01
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, at present, the adsorption capacity of this kind of biomass adsorbent is low, and the preparation method is relatively complicated, and the previous research is mostly on single pollutants such as heavy metal ions (Chinese patent application number: 201210006790.5) or dye molecules (Chinese patent publication number: CN 101224411A) , there are few reports on the adsorption of such biomass adsorbents to actual industrial wastewater, especially coking wastewater

Method used

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  • Biomass-modified adsorbent for adsorbing coking wastewater, and preparation method and application thereof
  • Biomass-modified adsorbent for adsorbing coking wastewater, and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0026] Wash the discarded peanut shells with tap water, dry them at 100 °C, crush them with a plant grinder, pass through a 40-mesh sieve, and take the sieved particles; add 100 mL of phosphoric acid with a mass percentage concentration of 15% to 20 g of the above peanut shell particles The solution was soaked at room temperature for 12 h, filtered out, washed with water until neutral, dried at 105 °C, and calcined at 400 °C for 0.5 h in a muffle furnace to obtain a modified peanut shell adsorbent.

[0027] Weigh 2 g of the peanut shell modified adsorbent obtained above, put it into a conical flask containing 100 mL of coking wastewater raw water, and then place it in a constant temperature shaking box, shake and adsorb at 170 rpm at 25 °C for 8 h, measure The COD removal rate of the water sample after adsorption reached 61%, and compared with the unmodified peanut shell, the removal rate increased by 48%, such as figure 1 shown.

Embodiment 2

[0029] Wash the discarded peanut shells with tap water, dry them at 100 °C, crush them with a plant grinder, pass through a 40-mesh sieve, and take the sieved particles; add 100 mL of phosphoric acid with a mass percentage concentration of 10% to 15 g of the above peanut shell particles The solution was soaked at room temperature for 10 h, filtered out, washed with water until neutral, dried at 105 °C, and calcined at 350 °C for 1 h in a muffle furnace to obtain the modified peanut shell adsorbent.

[0030] Weigh 2 g of the peanut shell modified adsorbent obtained above, put it into a conical flask containing 100 mL of coking wastewater raw water, and then place it in a constant temperature shaking box, shake and adsorb at 170 rpm at 25 °C for 8 h, measure The COD removal rate of the water sample after adsorption reached 60%, and compared with the unmodified peanut shell, the removal rate increased by 47%.

Embodiment 3

[0032] Wash the discarded pomelo peels with tap water, dry them at 100 °C, crush them with a plant grinder, pass them through a 40-mesh sieve, and take the particles on the sieve; add 100 mL of phosphoric acid with a mass percentage concentration of 15% to 18 g of the above grapefruit peel particles The solution was soaked at room temperature for 8 h, filtered out, washed with water until neutral, dried at 105 °C, and calcined at 410 °C for 0.5 h in a muffle furnace to obtain the modified adsorbent of pomelo peel.

[0033] Weigh 2 g of the grapefruit peel modified adsorbent obtained above, put it into a conical flask containing 100 mL of coking wastewater raw water, and then place it in a constant temperature oscillation box, shake and adsorb at 170 rpm at 25 °C for 8 h, measure The COD removal rate of the water sample after adsorption reached 68%, compared with the unmodified pomelo peel, the removal rate increased by 53%, such as figure 2 shown.

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Abstract

The invention discloses a biomass-modified adsorbent for adsorbing coking wastewater, and a preparation method and application thereof. The biomass-modified adsorbent is prepared from waste fruit shell or pericarp as a raw material through phosphoric acid modification. The preparation method comprises the following steps: cleaning and drying the fruit shell or pericarp, screening after crushing, and adding a phosphoric acid solution to soak; washing to be neutral, drying and calcining, so as to obtain the biomass-modified adsorbent. The biomass-modified adsorbent disclosed by the invention can be applied to actual adsorption treatment of the coking wastewater; COD (chemical oxygen demand) burden of biological treatment is reduced; waste materials can be changed into precious resources. Thus, on one hand, the throughput of solid agricultural waste is reduced; on the other hand, the adsorbent after adsorbing the coking wastewater can also be used as a fuel to provide heat energy. The biomass-modified adsorbent disclosed by the invention is granulated; the adopted raw materials are cheap and available; the preparation method is simple, low in cost and easy to industrialize.

Description

technical field [0001] The invention belongs to the field of modified adsorption materials, and relates to a biomass modified adsorbent, in particular to a biomass adsorbent for adsorbing coking wastewater and a preparation method thereof. Background technique [0002] Coking wastewater is wastewater produced during the process of coal coke, gas purification and coking product recovery. Phenyl, anthracene and other heterocyclic and polycyclic aromatic compounds (PAHs) are typical toxic and harmful organic wastewater that is difficult to biodegrade. At present, the main methods of domestic coking enterprises to treat coking wastewater are: to separate oil and some suspended organic matter through pretreatment such as oil separation and air flotation; then to enter multi-stage biological treatment (such as anaerobic, aerobic, anoxic), and finally through membrane filtration Or coagulation treatment to obtain produced water. However, the removal of COD by this method is poor,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/20B01J20/30C02F1/28
Inventor 胡芸邱诗融单文杰韦朝海
Owner SOUTH CHINA UNIV OF TECH
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