Method for preparing porous ceramic material for adsorbing heavy metals

Abstract

The invention discloses a method for preparing a porous ceramic material for adsorbing heavy metals. The method comprises the following steps: (1) preparing pug; (2) preparing a phosphorous compound solution: dissolving 20-40 parts (by weight) of phosphorous compound in 30-60 parts (by weight) of water so as to obtain the phosphorous compound solution; (3) carrying out milling: adding the phosphorous compound solution prepared in the step (2) into the pug prepared in the step (1), and carrying out milling for 20 to 30 minutes by using a mixing mill; (4) carrying out ceramic green body forming; (5) carrying out ceramic green body drying; and (6) carrying out ceramic green body burning. The porous ceramic material for adsorbing the heavy metals, prepared by the method, has the advantages of porosity, high specific area, high mechanical strength, high physical adsorptivity, high chemical adsorptivity and wide chemical adsorption adaptability.

Description

technical field

[0001] The invention relates to a preparation method of a porous ceramic material for absorbing heavy metals. Background technique

[0002] At present, heavy metal pollution has brought great harm to human existence. It mainly includes environmental pollution and human injury. Heavy metal pollution incidents have also emerged in an endless stream in various places, causing great losses to people's lives and property. With the advancement of global industrialization, the problem of heavy metal pollution is becoming a serious problem that all human beings must face in order to survive and develop. In my country, industrial pollution has caused 1 / 5 of the country's arable land and 80.1% of the bottom of rivers, lakes and reservoirs to be polluted by heavy metals. Mass incidents of heavy metals in water bodies and soils seriously endangering human health occur frequently. In 2011, the State Council approved the first "Twelfth Five-Year Plan" special plan "The Tw...

Examples

Embodiment 1

[0016] A method for preparing a porous ceramic material for adsorbing heavy metals, comprising the following steps:

[0017] 1) Preparation of mud: First, add 70kg of Anhui clay, 15kg of kaolin, 10kg of montmorillonite, 5kg of scallop powder, and 30kg of water into a mixer and mix for 20 minutes to prepare mud;

[0018] 2) Phosphorus compound solution preparation: Dissolve 20kg of monoammonium phosphate in 50kg of water to prepare monoammonium phosphate solution;

[0019] 3) Mixing: Put the monoammonium phosphate solution prepared in step 2) into the mud in step 1), and mix again with a mixer for 30 minutes;

[0020] 4) Forming the ceramic body: extruding the mud material prepared in step 3) into a green body;

[0021] 5) Drying of the ceramic green body: drying the green body prepared in step 4) at 200-220°C until the water weight percentage is lower than 0.8%;

[0022] 6) Firing the ceramic green body: the dried green body in step 5) can be fired at a firing temperature of...

Embodiment 2

[0024] A method for preparing a porous ceramic material for adsorbing heavy metals, comprising the following steps:

[0025] 1) Preparation of mud: First, add 55kg of Anhui clay, 30kg of kaolin, 10kg of montmorillonite, 5kg of safflower powder, and 35kg of water into a mixer and mix for 20 minutes to prepare mud;

[0026] 2) Phosphorus compound solution preparation: Dissolve 40kg of triammonium phosphate in 60kg of water to prepare a triammonium phosphate solution;

[0027] 3) Mixing: Put the triammonium phosphate solution prepared in step 2) into the mud in step 1), and mix again with a mixer for 30 minutes;

[0028] 4) Forming the ceramic body: extruding the mud material prepared in step 3) into a green body;

[0029] 5) Drying of the ceramic green body: drying the green body prepared in step 4) at 200-220°C until the water weight percentage is lower than 0.8%;

[0030] 6) Firing the ceramic green body: the dried green body in step 5) can be fired at a firing temperature o...

Embodiment 3

[0032] A method for preparing a porous ceramic material for adsorbing heavy metals, comprising the following steps:

[0033] 1) Preparation of mud: First, add 50kg of Anhui clay, 25kg of kaolin, 8kg of montmorillonite, 5kg of safflower powder, and 28kg of water into a mixer and mix for 20 minutes to prepare mud;

[0034] 2) Phosphorus compound solution preparation: Dissolve 30kg of monoammonium phosphate in 45kg of water to prepare monoammonium phosphate solution;

[0035] 3) Mixing: Put the monoammonium phosphate solution prepared in step 2) into the mud in step 1), and mix again with a mixer for 25 minutes;

[0036] 4) Forming the ceramic body: extruding the mud material prepared in step 3) into a green body;

[0037] 5) Drying of the ceramic green body: drying the green body prepared in step 4) at 200-220°C until the water weight percentage is lower than 0.8%;

[0038] 6) Firing the ceramic green body: the dried green body in step 5) can be fired at a firing temperature o...

technical field

[0001] The invention relates to a preparation method of a porous ceramic material for absorbing heavy metals. Background technique

[0002] At present, heavy metal pollution has brought great harm to human existence. It mainly includes environmental pollution and human injury. Heavy metal pollution incidents have also emerged in an endless stream in various places, causing great losses to people's lives and property. With the advancement of global industrialization, the problem of heavy metal pollution is becoming a serious problem that all human beings must face in order to survive and develop. In my country, industrial pollution has caused 1 / 5 of the country's arable land and 80.1% of the bottom of rivers, lakes and reservoirs to be polluted by heavy metals. Mass incidents of heavy metals in water bodies and soils seriously endangering human health occur frequently. In 2011, the State Council approved the first "Twelfth Five-Year Plan" special plan "The Tw...

Examples

Embodiment 1

[0016] A method for preparing a porous ceramic material for adsorbing heavy metals, comprising the following steps:

[0017] 1) Preparation of mud: First, add 70kg of Anhui clay, 15kg of kaolin, 10kg of montmorillonite, 5kg of scallop powder, and 30kg of water into a mixer and mix for 20 minutes to prepare mud;

[0018] 2) Phosphorus compound solution preparation: Dissolve 20kg of monoammonium phosphate in 50kg of water to prepare monoammonium phosphate solution;

[0019] 3) Mixing: Put the monoammonium phosphate solution prepared in step 2) into the mud in step 1), and mix again with a mixer for 30 minutes;

[0020] 4) Forming the ceramic body: extruding the mud material prepared in step 3) into a green body;

[0021] 5) Drying of the ceramic green body: drying the green body prepared in step 4) at 200-220°C until the water weight percentage is lower than 0.8%;

[0022] 6) Firing the ceramic green body: the dried green body in step 5) can be fired at a firing temperature of...

Embodiment 2

[0024] A method for preparing a porous ceramic material for adsorbing heavy metals, comprising the following steps:

[0025] 1) Preparation of mud: First, add 55kg of Anhui clay, 30kg of kaolin, 10kg of montmorillonite, 5kg of safflower powder, and 35kg of water into a mixer and mix for 20 minutes to prepare mud;

[0026] 2) Phosphorus compound solution preparation: Dissolve 40kg of triammonium phosphate in 60kg of water to prepare a triammonium phosphate solution;

[0027] 3) Mixing: Put the triammonium phosphate solution prepared in step 2) into the mud in step 1), and mix again with a mixer for 30 minutes;

[0028] 4) Forming the ceramic body: extruding the mud material prepared in step 3) into a green body;

[0029] 5) Drying of the ceramic green body: drying the green body prepared in step 4) at 200-220°C until the water weight percentage is lower than 0.8%;

[0030] 6) Firing the ceramic green body: the dried green body in step 5) can be fired at a firing temperature o...

Embodiment 3

[0032] A method for preparing a porous ceramic material for adsorbing heavy metals, comprising the following steps:

[0033] 1) Preparation of mud: First, add 50kg of Anhui clay, 25kg of kaolin, 8kg of montmorillonite, 5kg of safflower powder, and 28kg of water into a mixer and mix for 20 minutes to prepare mud;

[0034] 2) Phosphorus compound solution preparation: Dissolve 30kg of monoammonium phosphate in 45kg of water to prepare monoammonium phosphate solution;

[0035] 3) Mixing: Put the monoammonium phosphate solution prepared in step 2) into the mud in step 1), and mix again with a mixer for 25 minutes;

[0036] 4) Forming the ceramic body: extruding the mud material prepared in step 3) into a green body;

[0037] 5) Drying of the ceramic green body: drying the green body prepared in step 4) at 200-220°C until the water weight percentage is lower than 0.8%;

[0038] 6) Firing the ceramic green body: the dried green body in step 5) can be fired at a firing temperature o...

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