Structural filter core for removing benzene from drinking water and preparation method thereof

Abstract

The invention discloses structural filter cores and specifically relates to a structural filter core for removing benzene from drinking water and a preparation method thereof. In the preparation process of the structural filter core, a certain amount of 180-mesh bentonite is weighed according to ratio of raw materials, sodium sulfide is added in the bentonite, and activation is carried out for 120-240min at the temperature of 120-180 DEG C; the activated mixture is mixed with polyvinyl chloride, a certain amount of azodicarboxylate isopropyl is then added and mixed to be even; and the mixture is put in a columnar mold, sintered at the temperature of 320-400 DEG C and molded after about 210-300min, and demolded till being cooled by airing, and then, the columnar filter core with the pore diameter of 3mm to 5mm and the porosity factor of 30% to 40% is formed. The structural filter core not only purifies the drinking water, but also avoids the injury to human bodies arising from excessive benzene in the drinking water, thereby being very applicable to the treatment of drinking water at home terminals. Proved by test, the structural filter core can have a ratio of over 99.9% in the removal of the benzene in the drinking water.

Description

technical field

[0001] The invention relates to a structural filter element for removing benzene in drinking water and a preparation method thereof, relates to the removal of benzene in drinking water, and belongs to the technical field of drinking water purification treatment. Background technique

[0002] Benzene is a carcinogen with varying degrees of toxicity to the human body and aquatic organisms; inhalation of high-soluble benzene in a short period of time can cause anesthesia of the central nervous system, and mild cases may cause dizziness, headache, nausea, chest tightness, and fatigue , confusion, severe cases can cause coma and death due to respiratory and circulatory failure; when the benzene content reaches a certain concentration, people may have neurasthenia-like symptoms such as headache, insomnia, listlessness, and memory loss; benzene compounds have been approved by the World Health Organization Determined as a strong carcinogen; the country has restricted...

Examples

example 1

[0026] In terms of substance mass percentage:

[0027] Polyvinyl chloride with a molecular weight of 14 million to 15 million 10% 180 mesh bentonite 70%

[0028] Sodium Sulfide 12% Isopropyl Azodicarboxylate 8%

[0029] Its preparation method is as follows:

[0030] Use the activator sodium sulfide to activate the bentonite at 120°C for 220 minutes; then put the prepared mixture into a plexiglass column with a certain diameter and mix it with polyvinyl chloride, and then add a certain amount of azodicarboxylic acid The isopropyl ester is mixed evenly, and sintered at 390°C. After 290 minutes, it is preliminarily formed, and then it is cooled and demolded to form a columnar structure filter element with a pore diameter of 3mm and a porosity of 30%.

example 2

[0032] In terms of substance mass percentage:

[0033] Polyvinyl chloride with a molecular weight of 14 million to 15 million 6% 180 mesh bentonite 80%

[0034] Sodium Carbonate 10% Isopropyl Azodicarboxylate 4%

[0035] Its preparation method is as follows:

[0036] Use the activator sodium carbonate to activate the bentonite at 120°C for 210 minutes; then put the prepared mixture into a plexiglass column with a certain diameter and mix it with polyvinyl chloride, and then add a certain amount of azodicarboxylic acid The isopropyl ester is mixed evenly, and sintered at 380°C. After 280 minutes, it is preliminarily formed. After cooling and demolding, it becomes a columnar structure filter element with a pore diameter of 4mm and a porosity of 40%.

example 3

[0038] In terms of substance mass percentage:

[0039] Polyvinyl chloride with a molecular weight of 14 million to 15 million 14% 180 mesh bentonite 59%

[0040] Sodium Hydroxide 15% Isopropyl Azodicarboxylate 12%

[0041] Its preparation method is as follows:

[0042] Use the activator sodium hydroxide to activate the bentonite at 120°C for 200 minutes; then put the prepared mixture into a plexiglass column with a certain diameter and mix it with polyvinyl chloride, and then add a certain amount of azobis Mix the isopropyl formate evenly, sinter at 370°C, take a preliminary shape after 270 minutes, let it cool and demould, and then become a columnar structure filter element with a pore diameter of 5mm and a porosity of 35%.

technical field

[0001] The invention relates to a structural filter element for removing benzene in drinking water and a preparation method thereof, relates to the removal of benzene in drinking water, and belongs to the technical field of drinking water purification treatment. Background technique

[0002] Benzene is a carcinogen with varying degrees of toxicity to the human body and aquatic organisms; inhalation of high-soluble benzene in a short period of time can cause anesthesia of the central nervous system, and mild cases may cause dizziness, headache, nausea, chest tightness, and fatigue , confusion, severe cases can cause coma and death due to respiratory and circulatory failure; when the benzene content reaches a certain concentration, people may have neurasthenia-like symptoms such as headache, insomnia, listlessness, and memory loss; benzene compounds have been approved by the World Health Organization Determined as a strong carcinogen; the country has restricted...

Examples

example 1

[0026] In terms of substance mass percentage:

[0027] Polyvinyl chloride with a molecular weight of 14 million to 15 million 10% 180 mesh bentonite 70%

[0028] Sodium Sulfide 12% Isopropyl Azodicarboxylate 8%

[0029] Its preparation method is as follows:

[0030] Use the activator sodium sulfide to activate the bentonite at 120°C for 220 minutes; then put the prepared mixture into a plexiglass column with a certain diameter and mix it with polyvinyl chloride, and then add a certain amount of azodicarboxylic acid The isopropyl ester is mixed evenly, and sintered at 390°C. After 290 minutes, it is preliminarily formed, and then it is cooled and demolded to form a columnar structure filter element with a pore diameter of 3mm and a porosity of 30%.

example 2

[0032] In terms of substance mass percentage:

[0033] Polyvinyl chloride with a molecular weight of 14 million to 15 million 6% 180 mesh bentonite 80%

[0034] Sodium Carbonate 10% Isopropyl Azodicarboxylate 4%

[0035] Its preparation method is as follows:

[0036] Use the activator sodium carbonate to activate the bentonite at 120°C for 210 minutes; then put the prepared mixture into a plexiglass column with a certain diameter and mix it with polyvinyl chloride, and then add a certain amount of azodicarboxylic acid The isopropyl ester is mixed evenly, and sintered at 380°C. After 280 minutes, it is preliminarily formed. After cooling and demolding, it becomes a columnar structure filter element with a pore diameter of 4mm and a porosity of 40%.

example 3

[0038] In terms of substance mass percentage:

[0039] Polyvinyl chloride with a molecular weight of 14 million to 15 million 14% 180 mesh bentonite 59%

[0040] Sodium Hydroxide 15% Isopropyl Azodicarboxylate 12%

[0041] Its preparation method is as follows:

[0042] Use the activator sodium hydroxide to activate the bentonite at 120°C for 200 minutes; then put the prepared mixture into a plexiglass column with a certain diameter and mix it with polyvinyl chloride, and then add a certain amount of azobis Mix the isopropyl formate evenly, sinter at 370°C, take a preliminary shape after 270 minutes, let it cool and demould, and then become a columnar structure filter element with a pore diameter of 5mm and a porosity of 35%.