Graphite/sludge composite adsorbent, and preparation method and application thereof

A composite adsorption and sludge technology, applied in water/sludge/sewage treatment, water/sewage treatment, chemical instruments and methods, etc., can solve the problem of poor performance of sludge activated carbon, low adsorption value of activated carbon, and poor applicability To achieve the effect of improving reaction efficiency and yield, improving adsorption performance, and improving raw material properties

Active Publication Date: 2017-05-10
ANHUI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the remaining sludge has low carbon content and high ash content, and the prepared sludge activated carbon has poor performance and poor applicability
Compared with commercial activated carbon, sludge activated carbon generally has a lower specific surface area, a smaller proportion of micropores in the pore structure, mainly mesopores and macropores, and a lower adsorption value of activated carbon.

Method used

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  • Graphite/sludge composite adsorbent, and preparation method and application thereof
  • Graphite/sludge composite adsorbent, and preparation method and application thereof
  • Graphite/sludge composite adsorbent, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] A preparation method of graphite / sludge composite adsorbent, comprising the following steps:

[0039] 1) Sludge pretreatment:

[0040] Obtain a sufficient amount of dewatered sludge from a secondary sedimentation tank from a sewage treatment plant in the south of Wuhu City, put it in an oven and dry it at 105°C for 12 hours, grind it into a uniform fine powder, pass through a 200-mesh sieve, and sieve the sludge fine powder Put it into a weighing bottle and place it in a desiccator for standby to obtain pretreated sludge.

[0041] 2) Loaded graphite:

[0042] Take 11.25g of pretreated sludge, put it in a 1000ml beaker, add 3.75g of graphite, and mix well.

[0043] 3) Impregnation activation:

[0044] Slowly inject 3mol / L of ZnCl in the mixed material obtained in step 2) according to the ratio of solid-to-liquid ratio of 1:2.5 2 The activator solution was fully stirred and soaked for 24 hours, sealed with plastic wrap, and suction filtered. The solid after suction fi...

Embodiment 2

[0051] A preparation method of graphite / sludge composite adsorbent, comprising the following steps:

[0052] 1) Sludge pretreatment:

[0053] Obtain a sufficient amount of dewatered sludge from a secondary sedimentation tank from a sewage treatment plant in the south of Wuhu City, put it in an oven and dry it at 105°C for about 12 hours, grind it into a uniform fine powder, pass it through a 200-mesh sieve, and fine the sieved sludge Put the powder into a weighing bottle and put it in a drier for standby, so as to obtain the pretreated sludge.

[0054] 2) Loaded graphite:

[0055] Take 7.5g of pretreated sludge, put it in a 1000ml beaker, add 7.5g of graphite, and mix well.

[0056] 3) Impregnation activation:

[0057] Slowly inject 3mol / L of ZnCl in the mixed material obtained in step 2) according to the ratio of solid-to-liquid ratio of 1:2.52 The activator solution was fully stirred and soaked for 24 hours, sealed with plastic wrap, and suction filtered. The solid after ...

Embodiment 3

[0064] A preparation method of graphite / sludge composite adsorbent, comprising the following steps:

[0065] 1) Sludge pretreatment:

[0066] Obtain a sufficient amount of dewatered sludge from a secondary sedimentation tank from a sewage treatment plant in the south of Wuhu City, put it in an oven and dry it at 105°C for 12 hours, grind it into a uniform fine powder, pass through a 200-mesh sieve, and sieve the sludge fine powder Put it into a weighing bottle and place it in a desiccator for standby to obtain pretreated sludge.

[0067] 2) Loaded graphite:

[0068] Take 11.25g of pretreated sludge, put it in a 1000ml beaker, add 3.75g of graphite, and mix well.

[0069] 3) Impregnation activation:

[0070] Slowly inject 3mol / L of ZnCl in the mixed material obtained in step 2) according to the ratio of solid-to-liquid ratio of 1:2.5 2 Activator solution, stir well and soak for 24 hours, and seal it with plastic wrap. Suction filtration, drying the filtered solid at 105° C...

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PUM

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Abstract

The invention discloses a graphite / sludge composite adsorbent, and a preparation method and application thereof. Compared with the prior art, the graphite / sludge composite adsorbent, the preparation method and the application thereof have the advantages that graphite the sludge are firstly mixed and are then activated by ZnCl2; then, high temperature carbonization is performed by a muffle furnace; the prepared adsorbent has high specific surface area and high adsorbing capacity; the reaction efficiency and the finished product rate are improved; meanwhile, the cost is also reduced; when the prepared adsorbent is applied to a black and odorous water body, a certain removal effect is achieved on the COD, the turbidity, the chromaticity and the like of the water body, and meanwhile, the removal rate on indexes of TP, TN and the like is also improved.

Description

technical field [0001] The invention relates to a composite adsorption material, in particular to a graphite / sludge composite adsorbent, a preparation method and an application thereof. Background technique [0002] With the gradual development of my country's industry, the waste water and waste gas discharged from some factories lead to rivers, which has led to the increasingly serious phenomenon of black and smelly river water in our country. Black and odorous water not only affects the working and living environment of surrounding residents, but also causes great harm to human health. Therefore, the research and treatment of black and odorous water body has increasingly become a focus of attention. [0003] The remaining sludge of urban sewage treatment plants is the main waste produced by sewage treatment plants. Sludge has become a potential source of pollution because it contains heavy metals, organic matter, pathogens, etc. However, the excess sludge is rich in orga...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/30C02F1/28
CPCB01J20/0244B01J20/20C02F1/283
Inventor 段文松程路漫许志恒郝敏
Owner ANHUI NORMAL UNIV
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