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Preparation method for formed carbon ceramic used for adsorbing humic acid

A technology of humic acid and ceramics, applied in chemical instruments and methods, adsorption water/sewage treatment, alkali metal oxides/hydroxides, etc., can solve the problems of eye irritation and corrosion, and achieve adsorption performance Good, good molding effect, high specific surface area effect

Active Publication Date: 2017-09-29
NANJING FORESTRY UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After the modified attapulgite is ground into powder, the adsorption capacity of humic acid is 157.44mg / g, but the surfactant cetyltrimethylammonium chloride used in it has no effect on fish organisms in water. Is highly toxic and irritating to the eyes, corrosive

Method used

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  • Preparation method for formed carbon ceramic used for adsorbing humic acid
  • Preparation method for formed carbon ceramic used for adsorbing humic acid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Mix the attapulgite that has been crushed and sieved to more than 120 mesh with the waste powdered activated carbon crushed to more than 200 mesh at a mass ratio of 1:4, then add water, put it into a kneader for full mixing and kneading for 2 hours, Pour the above mixture into a mold for extrusion molding, put the extruded columnar carbon ceramic body in an oven at 110°C to dry for 4 hours, take it out, cool it to room temperature, and heat up at a rate of 5°C / min Heating to 800°C, keeping it warm for 2 hours, and taking it out after cooling down to room temperature to obtain columnar carbon ceramics. Its performance is shown in Table 1.

Embodiment 2

[0024] Mix attapulgite that has been crushed and sieved to 120 mesh with charcoal crushed to 200 mesh or more in a mass ratio of 1:3, then add water, put it into a kneader for full mixing and kneading for 1 hour, pour the above mixture into In the mold, carry out extrusion molding, put the extruded columnar carbon ceramic green body into an oven at 110°C to dry for 4 hours, take it out, cool it to room temperature, heat it to 800°C at a heating rate of 5°C / min, and keep it warm. After 2 hours, take it out after cooling down to room temperature to obtain columnar carbon ceramics. Its performance is shown in Table 1.

Embodiment 3

[0026] Mix the attapulgite that has been crushed and sieved to more than 200 mesh with the waste powdered activated carbon crushed to more than 200 mesh at a mass ratio of 1:2, then add water, put it into a kneader for full mixing and kneading for 1 hour, Pour the above mixture into a mold for extrusion molding, put the extruded columnar carbon ceramic green body in an oven at 110°C for drying, take it out, then heat it to 800°C at a heating rate of 5°C / min, and keep it warm for 2 hours , and take it out after it drops to room temperature to obtain columnar carbon ceramics. Its performance is shown in Table 1.

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Abstract

The invention discloses a preparation method for a formed carbon ceramic used for adsorbing humic acid. The preparation method comprises the following steps: 1) mixing an inorganic binder and powdery carbon according to a mass ratio of 1: (2-4), then adding water and putting the obtained mixture into a kneader for stirring and kneading so as to obtain a plasticized material; 2) subjecting the plasticized material to extrusion forming and the drying a formed body in an oven so as to obtain a green carbon ceramic body; and 3) sintering the green carbon ceramic body at 800 to 1000 DEG C and carrying out cooling before taking out the formed carbon ceramic. The preparation method provided by the invention has the advantages of simple preparation process and low cost; and the prepared carbon ceramic material has strong adsorption effect on humic acid, good strength and good water resistance, is easy to separate, can be cyclically used and is a water treatment material with good application prospects.

Description

technical field [0001] The invention belongs to the technical field of preparation of shaped carbon ceramics, in particular to a method for preparing shaped carbon ceramics for absorbing humic acid by molding powdered carbon and an inorganic binder. Background technique [0002] Carbon ceramics are porous ceramics and a new type of ceramic material. Porous ceramics are an inorganic non-metallic material with a well-developed pore structure. Carbon ceramics is a material with high mechanical strength and a relatively developed pore structure obtained by mixing ceramic materials and carbon materials or carbonaceous substances through high-temperature sintering. It not only has the advantages of high specific surface area, developed pore structure and superior adsorption performance of activated carbon, but also combines the characteristics of high mechanical strength, high temperature resistance and acid and alkali resistance of ceramic materials. Carbon ceramics have import...

Claims

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Application Information

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IPC IPC(8): B01J20/20B01J20/28B01J20/30C02F1/28C02F101/34C02F101/38
CPCB01J20/12B01J20/20B01J20/28064B01J20/28073C02F1/281C02F2101/34C02F2101/38
Inventor 左宋林李娟申保收
Owner NANJING FORESTRY UNIV
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