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Removal of organic pollutants in wastewater based on rattle-shaped nanocomposites

A technology of nanocomposite materials and organic pollutants, applied in water pollutants, organic compound/hydride/coordination complex catalysts, water/sewage treatment, etc., can solve the problem of reducing catalytic active sites, affecting catalytic activity, Enrichment pollutants limit and other issues, to achieve the effect of environmental protection, fast and efficient removal, and shorten the degradation time

Active Publication Date: 2021-09-07
QINGDAO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The heterogeneous Fenton catalysts in the above-mentioned patents are all used to react and catalyze the degradation of organic pollutants, but the preparation steps of the heterogeneous Fenton catalysts in the patent CN 106076335 A are relatively complicated, and the conditions required in the high-temperature activation treatment are: muffle The pyrolysis temperature of the furnace is 600-1000°C, the preparation conditions are high, and the energy consumption is large; in the patent CN 107497434 A, although nano-silica (SP30) has a large specific surface area, high porosity, and many surface active centers, it is used in catalysts and The catalyst carrier has potential application value, but the silicon oxide-coated iron oxide has a solid structure, which will reduce the exposed catalytic active sites, and the amount of enriched pollutants will also be limited, which will affect the catalytic activity. , and the removal effect

Method used

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  • Removal of organic pollutants in wastewater based on rattle-shaped nanocomposites
  • Removal of organic pollutants in wastewater based on rattle-shaped nanocomposites
  • Removal of organic pollutants in wastewater based on rattle-shaped nanocomposites

Examples

Experimental program
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Effect test

Embodiment 1

[0030] Such as Figure 1-6 Shown, a method for removing organic pollutants in wastewater based on rattle-type nanocomposites comprises the following steps:

[0031] (1), first add 0.1M hydrochloric acid to the wastewater whose methylene blue concentration is 50mg / L, adjust the initial pH value of the wastewater to 4, and then add Fe in an amount of 1.0g / L 3 o 4 The @MOFs nanocomposite material was added to the wastewater, and after stirring for 5 minutes, the addition of 30mM H 2 o 2 Add, continue to stir, control the reaction temperature to 35°C, and the reaction time to 60min;

[0032] (2), said step (1) after the completion of the reaction to form a mixed solution A, then using an external magnetic field will Fe 3 o 4 The @MOFs nanocomposite was separated from the mixed solution A, and the pH of the separated liquid was adjusted to neutral before discharge.

[0033] Rattle Fe 3 o 4 The preparation steps of @MOFs nanocomposites are as follows:

[0034] (1), weighing...

Embodiment 2

[0040] Such as Figure 1-6 Shown, a method for removing organic pollutants in wastewater based on rattle-type nanocomposites comprises the following steps:

[0041] (1), first add 0.1M hydrochloric acid to the wastewater with a phenol concentration of 30mg / L, adjust the initial pH value of the wastewater to 3, and then add 0.8g / L of Fe 3 o 4 The @MOFs nanocomposite material was added to the wastewater, and after stirring for 3 minutes, 25mM H 2 o 2 Add, continue to stir, control the reaction temperature to 25°C, and the reaction time to 30min;

[0042] (2), said step (1) after the completion of the reaction to form a mixed solution A, then using an external magnetic field will Fe 3 o 4 The @MOFs nanocomposite was separated from the mixed solution A, and the pH of the separated liquid was adjusted to neutral before discharge.

[0043] Rattle Fe 3 o 4 The preparation steps of @MOFs nanocomposites are as follows:

[0044] (1), weighing: take by weighing 35mg, particle di...

Embodiment 3

[0050] Such as Figure 1-6 Shown, a method for removing organic pollutants in wastewater based on rattle-type nanocomposites comprises the following steps:

[0051] (1), first add 0.1M hydrochloric acid to the wastewater with a rhodamine B concentration of 100mg / L, adjust the initial pH value of the wastewater to 4, and then add Fe in an amount of 1.2g / L 3 o 4 The @MOFs nanocomposite material was added to the wastewater, and after stirring for 5 minutes, the addition of 35mM H 2 o 2 Add, continue to stir, control the reaction temperature to 45°C, and the reaction time to 90min;

[0052] (2), said step (1) after the completion of the reaction to form a mixed solution A, then using an external magnetic field will Fe 3 o 4 The @MOFs nanocomposite was separated from the mixed solution A, and the p H is adjusted to neutral and then discharged.

[0053] Rattle Fe 3 o 4 The preparation steps of @MOFs nanocomposites are as follows:

[0054] (1), weighing: weigh 50m g , a pa...

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Abstract

The invention relates to the technical field of wastewater treatment, in particular to a method for removing organic pollutants in wastewater based on a rattle-shaped nanocomposite material. Including the following steps: (1), first adjust the initial pH value of the waste water, then add the rattle-shaped magnetic nanocomposite material into the waste water, stir for 3‑5min, and then add H 2 o 2 , continue to stir, control the reaction temperature to be 25-45°C, and the reaction time is 30-90min; (2) After the step (1) is completed, a mixed solution A is formed, and then the Fe 3 o 4 The @MOFs nanocomposite was separated from the mixed solution A, and the pH of the separated liquid was adjusted to neutral before discharge. The invention has simple removal steps, can realize rapid and high-efficiency removal of organic pollutants in wastewater, can be directly reused without regeneration, saves time and effort, has high removal efficiency, has no secondary pollution to the environment, can be recycled and reused, and has low economic costs Low.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment, in particular to a method for removing organic pollutants in wastewater based on a rattle-shaped nanocomposite material. Background technique [0002] In recent years, with the rapid development of petrochemical, printing and dyeing, pharmaceutical, plastic, synthetic fiber, coking and other industries, a large amount of wastewater containing refractory organic pollutants has been produced. This type of wastewater has complex components, high concentration, poor biodegradability and even It has biological toxicity and other characteristics, and poses a great threat to the ecological environment and human health. Advanced Oxidation Technology (AOPs) can generate highly active hydroxyl radicals, which can completely oxidize and degrade organic matter in wastewater into inorganic matter or small molecular organic matter that is easily biodegradable, thereby realizing the harmless treatm...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/72B01J31/28C02F101/30
CPCC02F1/722C02F1/725B01J31/28C02F2101/30C02F2305/026B01J35/398B01J35/23B01J35/33
Inventor 杨瑞霞毛存峰谢文霞崔育倩
Owner QINGDAO UNIV
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