One-step method for preparing sludge-based formed magnetic active carbon

A magnetic activated carbon and sludge technology, applied in chemical instruments and methods, alkali metal oxides/hydroxides, inorganic chemistry, etc., can solve the technical scarcity of forming magnetic activated carbon, the preparation technology is rarely reported, and the preparation cost is low, etc. problems, to achieve good application prospects, a wide range of sources, and good wear resistance.

Active Publication Date: 2014-01-22
FUJIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In summary, at present, relevant literature and reports on shaped activated carbon and magnetic activated carbon are relatively common, but there are few reports on the preparation technology of combined magnetization and forming technology to prepare shaped magnetic activated carbon, especially the preparation cost is low and the strength is high. , The technology of forming magnetic activated carbon with good magnetic properties is even scarcer

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Sludge pretreatment: air-dry the sludge, crush it after air-drying, and pass through a 100-mesh sieve to get the dried sludge; take the sludge and ZnCl with a concentration of 3mol / L 2 The solution was mixed evenly according to the liquid-solid ratio of 1.5:1, and then placed in a water bath bar at 85°C for 1 hour at a constant temperature, and then dried in an oven at 95°C for 24 hours;

[0027] Preparation of shaped magnetic activated carbon precursor: take 10g of pretreated sludge and 1.5g of self-made nano-scale Fe 3 o 4 Mix and grind evenly, then add 1.5g of azodicarbonamide, mix and grind evenly to obtain a sludge mixture, and set aside; take another 1g of attapulgite and 2.5g of phenolic resin, mix and grind evenly, to obtain an ingredient mixture, set aside; weigh Take the silica sol and prepare the silica sol solution with deionized water. The quality of the silica sol weighed is 25% of the total mass of the sludge mixture and the ingredient mixture, which is ...

Embodiment 2

[0032] Sludge pretreatment: air-dry the sludge, crush it after air-drying, and pass through a 150-mesh sieve to get the dried sludge; take the sludge and ZnCl with a concentration of 2mol / L 2 The solution was mixed uniformly according to the liquid-solid ratio of 2:1, and then placed in a water bath bar at 65°C for 2 hours at a constant temperature, and then dried in an oven at 95°C for 24 hours;

[0033] Preparation of shaped magnetic activated carbon precursor: take 10g of pretreated sludge and 2g of self-made nano-scale Fe 3 o 4 Mix and grind evenly, then add 2g of azodicarbonamide, mix and grind evenly to obtain a sludge mixture, and set aside; take another 1g of attapulgite and 2.5g of phenolic resin, mix and grind evenly, to obtain an ingredient mixture, set aside; weigh Silica sol and adopt deionized water to configure the silica sol solution, the quality of the silica sol taken by weighing is 20% of the total mass of the sludge mixture and the batch mixture, i.e. 3.5g...

Embodiment 3

[0038] Sludge pretreatment: air-dry the sludge, then crush it, and pass through a 200-mesh sieve to get the dried sludge; take the sludge and ZnCl with a concentration of 3mol / L 2 The solution was mixed evenly according to the liquid-solid ratio of 2:1, and then placed in a water bath bar at 95°C for 2 hours at a constant temperature, and then dried in an oven at 105°C for 24 hours;

[0039] Preparation of shaped magnetic activated carbon precursor: take 10g of pretreated sludge and 2.5g of self-made nano-scale Fe 3 o 4 Mix and grind evenly, then add 2g of azodicarbonamide, mix and grind evenly to obtain a sludge mixture, and set aside; take another 1.5g of attapulgite and 2g of phenolic resin, mix and grind evenly to obtain a batching mixture, and obtain a batching mixture , standby; take the silica sol and adopt deionized water to configure the silica sol solution, the quality of the silica sol taken by weighing is 20% of the total mass of the sludge mixture and the batch m...

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Abstract

The invention provides a one-step method for preparing sludge-based formed magnetic active carbon. The method comprises the steps as follows: sludge is used as a raw material, sludge screened by a 100-200 mesh sieve and self-prepared nano-sized Fe3O4 are uniformly composited in a proportion to form a powdery magnetic active carbon precursor; phenolic resin-silica sol is adopted as a binding agent, the binding agent and an azodicarbonamide foaming agent are used for uniformly binding the powdery magnetic active carbon precursor to form a formed magnetic active carbon precursor with abundant pore structures; and finally, the formed magnetic active carbon precursor is certainly carbonized and activated to obtain the sludge-based formed magnetic active carbon. According to the one-step method, the sludge is used as a main raw material, the resource utilization of the sludge is achieved, the recycling is convenient, and reutilization can be achieved; and further, the sludge-based formed magnetic active carbon has a stable structure and good magnetic stability, and can be widely used in the fields such as sewage treatment, soil pollution treatment and the like.

Description

【Technical field】 [0001] The invention relates to a preparation method in the field of environmental protection, in particular to a one-step method for preparing sludge-based shaped magnetic activated carbon. 【Background technique】 [0002] Activated carbon is a kind of porous material with large specific surface area, developed pore structure and strong adsorption capacity. It has strong adsorption capacity for gases, heavy metals in solution, organic matter, inorganic matter and colloidal particles, and chemical It is stable in nature, so it has a wide range of applications in environmental governance, defense industry, chemical industry, food industry and other industries. [0003] Commercial activated carbon mostly uses coal, wood and fruit shells as the main raw materials, but due to limited resources and technical limitations, the production and application costs of activated carbon are relatively high. For example, Chinese patent 02160182.8, its manufacturing cost is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/28B01J20/30
Inventor 刘心中刘惠萍
Owner FUJIAN UNIV OF TECH
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