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Nitrogen and phosphorus absorbing agent

An adsorbent, nitrogen and phosphorus technology, applied in other chemical processes, chemical instruments and methods, etc., can solve problems such as difficult separation, unsatisfactory adsorption effect, harsh regeneration conditions, etc., and achieve simple and good repeatability in the preparation process and post-treatment process Use performance, reduce the effect of mass transfer resistance

Inactive Publication Date: 2011-03-30
LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Activated carbon is the most commonly used adsorbent for water treatment, but it is expensive, difficult to separate, harsh regeneration conditions, and the adsorption effect is not ideal
In recent years, the use of molecular sieves or cheap clay to adsorb nitrogen and phosphorus wastewater has also been reported, but the adsorption time is long and the adsorption capacity is low.

Method used

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  • Nitrogen and phosphorus absorbing agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Stir 100 grams of attapulgite clay with 1000 mL of 1mol / L ferric chloride solution at room temperature for 2 hours, add 2 grams of chitosan, and after dissolving, add an aqueous solution containing 80 grams of itaconic acid and 20 grams of acrylic acid, and then add 200 mL of ethanol aqueous solution, stirred evenly, added 0.5 g of N,N'-methylenebisacrylamide, stirred for 30 minutes, then added 0.2 g of ammonium persulfate. The temperature was raised to 70° C. for 3 hours. After the reaction is completed, carry out cross-linking treatment with aluminum chloride, filter and bake at 70°C to constant weight for packaging.

Embodiment 2

[0025] Stir 80 grams of attapulgite clay with 800 mL of 0.1mol / L sulfuric acid solution at room temperature for 2 hours, add 2 grams of polyvinyl alcohol, heat up to dissolve, add an aqueous solution containing 20 grams of methacrylic acid and 80 grams of acrylic acid, and then add 250 mL of ethanol aqueous solution, stir evenly, add 1 g of N,N'-methylenebisacrylamide, stir for 30 minutes, then add 3 g of ammonium persulfate. The temperature was raised to 70° C. for 3 hours. After the reaction is completed, it is cross-linked with calcium chloride, filtered and dried at 70°C until it is packed at a constant weight.

Embodiment 3

[0027] Stir 120 grams of attapulgite clay with 900 mL of 2.5 grams of hexadecyltrimethylammonium bromide solution at room temperature for 2 hours, add 3 grams of humic acid, and add 10 grams of methyl methacrylate after stirring evenly. and an aqueous solution of 80 grams of acrylic acid, and then 250 mL of an aqueous solution of isopropanol was added, after stirring evenly, 2 grams of N,N'-methylenebisacrylamide was added, and after stirring for 30 minutes, 5 grams of potassium persulfate was added. The temperature was raised to 70° C. for 3 hours. After the reaction is completed, it is cross-linked with calcium chloride, filtered and dried at 70°C until it is packed at a constant weight.

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Abstract

The invention discloses a nitrogen and phosphorus absorbing agent which comprises the following raw materials in parts by mass: 100 parts of olefin monomer, 80-200 parts of attapulgite clay, 5-20 parts of auxiliary raw material, 0.05-4.0 parts of initiator and 0.05-6.0 parts of cross-linking agent. The nitrogen and phosphorus absorbing agent forms a granular product in a reaction process, is simple in preparation process and post-treatment process, has no secondary pollution, is mainly used for treating lake eutrophic water, and can also be used for purifying water bodies of life wastewater, food wastewater, animal husbandry wastewater and the like.

Description

technical field [0001] The invention relates to the field of environmental protection water treatment, in particular to a nitrogen and phosphorus adsorbent. Background technique [0002] With my country's industrial progress and social development, water pollution has become increasingly serious and has become a difficult problem in environmental governance. According to monitoring by the environmental department, at least 100 million tons of untreated sewage is discharged directly into water bodies every day in cities and towns across the country. The water quality of more than half of the country's seven major water systems is polluted, 1 / 3 of the country's water bodies are not suitable for fish, 1 / 4 of the water bodies are not suitable for irrigation, 90% of urban waters are seriously polluted, and 50% of urban water sources are not suitable for drinking water standard. These statistics continue to grow as the economy continues to grow. [0003] Water pollution is main...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/30
Inventor 王爱勤郑易安林玖川杨效和郑礼根沈培友
Owner LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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