Method for removing nitrate nitrogen in water body

A technology of nitrate nitrogen and water body, applied in the field of environmental chemistry, can solve the problem of removing nitrate nitrogen, which has not been reported, and achieves the effects of protecting excellent characteristics, rapidly removing, and increasing specific surface area

Inactive Publication Date: 2014-08-06
CHANGAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Graphene is widely used in the research of battery electrodes, heavy metal ion adsorption, photocatalysis and conductive materials, but it has not been reported in the removal of nitrate nitrogen.

Method used

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  • Method for removing nitrate nitrogen in water body
  • Method for removing nitrate nitrogen in water body
  • Method for removing nitrate nitrogen in water body

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The method for removing nitrate nitrogen in the water body in this embodiment is:

[0028] Step 1. Preparation of graphene-loaded nano-iron: Under the protection of nitrogen atmosphere, 0.75g of ferrous sulfate heptahydrate and 0.015g of polyethylene glycol-4000 were completely dissolved in 100mL of deoxygenated distilled water, and then 0.75g of graphene was added and mixed evenly Obtain the suspension, then slowly add 20mL of potassium borohydride solution with a concentration of 1.0mol / L dropwise to the suspension under the condition of nitrogen protection and a stirring rate of 200r / min, and control the rate of addition of the potassium borohydride solution After the dropwise addition, continue to stir at a stirring rate of 120r / min for 20min, then filter under the protection of a nitrogen atmosphere, wash three times with deoxygenated distilled water, and then wash three times with absolute ethanol to obtain graphene-loaded nano Iron, stored in a desiccator protect...

Embodiment 2

[0033] Step 1. Preparation of graphene-loaded nano-iron: Under the protection of nitrogen atmosphere, 0.75g of ferrous sulfate heptahydrate and 0.015g of polyethylene glycol-4000 were completely dissolved in 100mL of deoxygenated distilled water, and then 0.375g of graphene was added and mixed evenly Obtain the suspension, then slowly add 20mL of potassium borohydride solution with a concentration of 1.0mol / L dropwise to the suspension under the condition of nitrogen protection and a stirring rate of 240r / min, and control the rate of addition of the potassium borohydride solution 1.2mL / min, continue stirring with 240r / min for 20min after the dropwise addition, then filter, wash three times with deoxygenated distilled water, and then wash three times with absolute ethanol to obtain graphene-loaded nano-iron, which is stored in nitrogen In a protected desiccator; the mass ratio of graphene and nano-iron in the graphene-loaded nano-iron is 2.5:1;

[0034] Step 2. Use graphene-loa...

Embodiment 3

[0037] Step 1. Preparation of graphene-loaded nano-iron: Under the protection of nitrogen atmosphere, 0.75g of ferrous sulfate heptahydrate and 0.015g of polyethylene glycol-4000 were completely dissolved in 100mL of deoxygenated distilled water, and then 1.125g of graphene was added and mixed evenly Obtain the suspension, then slowly add 20mL of potassium borohydride solution with a concentration of 1.0mol / L dropwise to the suspension under the condition of nitrogen protection and a stirring rate of 200r / min, and control the rate of addition of the potassium borohydride solution 1.0mL / min, continue to stir at a stirring rate of 120r / min for 20min after the dropwise addition, then filter, wash three times with deoxygenated distilled water, and then wash three times with absolute ethanol to obtain graphene-loaded nano-iron, which is stored in a nitrogen In a protected desiccator; the mass ratio of graphene and nano-iron in the graphene-loaded nano-iron is 7.5:1;

[0038] Step 2...

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Abstract

The invention provides a method for removing nitrate nitrogen in a water body, which comprises the following steps: 1, adding ferrous sulfate heptahydrate, polyethyleneglycol and graphene into deoxidized distilled water, mixing to prepare a suspension, then adding a potassium borohydride solution into the suspension, stirring, filtering, and washing to obtain graphene loaded nano iron; and 2, uniformly mixing the graphene loaded nano iron and a water body to be treated, and then performing constant-temperature oscillation treatment, thus ensuring that the removal rate of nitrate nitrogen in the water body is above 85%. According to the invention, the nitrate nitrogen in the water body is removed by using the graphene loaded nano iron, so that the method is simple in technical process, low in production cost and easy to realize popularization and application, maximally keeps the favorable characteristics of graphene and nano iron, and can efficiently and quickly remove the nitrate nitrogen in the water body, thereby obviously improving the nitrate nitrogen removal effect and having wide application value.

Description

technical field [0001] The invention belongs to the technical field of environmental chemistry, and in particular relates to a method for removing nitrate nitrogen in water bodies. Background technique [0002] In recent years, with the rapid development of industry, agriculture and economy, water pollution has become more and more serious. Nitrate nitrogen has become one of the most common pollutants entering water bodies, and the pollution has a worsening trend. The increase of nitrate concentration in drinking water will cause serious harm to human health. Therefore, the removal of nitrate nitrogen pollution in water bodies Research has become a hot environmental issue of worldwide concern. [0003] The remediation technologies for nitrate nitrogen pollution in water bodies are mainly divided into three categories according to the remediation principles: physical and chemical remediation technology, biological remediation technology and chemical reduction technology. Ph...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/467C02F1/58
Inventor 杨胜科李斌刘利周扬费晓华
Owner CHANGAN UNIV
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