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Magnetic cobalt catalyst catalyzed oxone degradation method of rhodamine b dye wastewater

A cobalt catalyst, dye wastewater technology, applied in the direction of oxidized water/sewage treatment, etc., can solve problems such as ecological environment and human health hazards, and achieve the effects of stable performance, strong absorption and catalysis, and strong market application prospects.

Active Publication Date: 2017-04-26
HENAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Soluble cobalt salts will be discharged with water after the reaction is completed, but cobalt is a heavy metal element that can be enriched in organisms and can accumulate in the human body through the food chain, so it has potential hazards to the ecological environment and human health

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] (1) Take 2.7029g FeCl 3 ∙6H 2 O, 2.7801g FeSO 4 ∙7H 2 O and 1.2871g CoSO 4 ∙7H 2 O was dissolved in 20mL deionized water, and the orange-red mixed solution was obtained after dissolving completely; (2) The mixed mixed solution was placed in a water bath and slowly heated to 60°C, and then added dropwise to 45mL molar concentration of 3mol L -1 In the aqueous ammonia solution, black solids are produced during the reaction, and a turbid liquid containing a large amount of black solids is obtained after the reaction; (3) Put the turbid liquid containing a large amount of black solids into an ultrasonic wave with a constant temperature of 60°C at a frequency of 20KHz , Ultrasound for 30 minutes under the condition of 100W; (4) Take out the turbid liquid containing a large amount of black solid, cool it to room temperature, wash it with deionized water until it is neutral, and then air dry it to obtain a magnetic cobalt catalyst with a mass percentage of cobalt of 7%; (...

Embodiment 2

[0012] (1) Take 2.7029g FeCl 3 ∙6H 2 O, 2.7801g FeSO∙7H 2 O and 0.4886g CoSO 4 ∙7H 2 O was dissolved in 20mL deionized water, and the orange-red mixed solution was obtained after dissolving completely; (2) The mixed mixed solution was placed in a water bath and slowly heated to 60°C, and then added dropwise to 45mL molar concentration of 3mol L -1 In the aqueous ammonia solution, black solids are produced during the reaction, and a turbid liquid containing a large amount of black solids is obtained after the reaction; (3) Put the turbid liquid containing a large amount of black solids into an ultrasonic wave with a constant temperature of 60°C at a frequency of 20KHz , Ultrasound for 30 minutes under the condition of 100W; (4) Take out the turbid liquid containing a large amount of black solid, cool it to room temperature, wash it with deionized water until it is neutral, and then air dry it to obtain a magnetic cobalt catalyst with a mass percentage of cobalt of 3%; ( 5)...

Embodiment 3

[0014] (1) Take 2.7029g FeCl 3 ∙6H 2 O, 2.7801g FeSO 4 ∙7H 2 O and 0.8636g CoSO 4 ∙7H 2 O was dissolved in 20mL deionized water, and the orange-red mixed solution was obtained after dissolving completely; (2) The mixed mixed solution was placed in a water bath and slowly heated to 60°C, and then added dropwise to 45mL molar concentration of 3mol L -1 In the aqueous ammonia solution, black solids are produced during the reaction, and a turbid liquid containing a large amount of black solids is obtained after the reaction; (3) Put the turbid liquid containing a large amount of black solids into an ultrasonic wave with a constant temperature of 60°C at a frequency of 20KHz , Ultrasound for 30 minutes under the condition of 100W; (4) Take out the turbid liquid containing a large amount of black solid, cool it to room temperature, rinse it with deionized water until it is neutral, and then air dry it to obtain a magnetic cobalt catalyst with a mass percentage of cobalt of 5%; ...

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Abstract

The invention discloses a method for degrading rhodamine B dye wastewater by catalyzing Oxone with a magnetic cobalt catalyst, belonging to the technical field of catalytic degradation of organic wastewater. The method comprises the following specific steps: firstly preparing the magnetic cobalt catalyst with mass percentage of cobalt being 7% by a hydrothermal method and adding an oxidation system formed by 0.9mL of Oxone solution with molar concentration of 0.01mol.L<-1> and 0.005g of magnetic cobalt catalyst with mass percentage of cobalt being 7% to 50mL of rhodamine B dye wastewater with mass concentration of 25mg.L<-1> under the condition of room temperature to carry out degradation for 26 minutes, wherein the degradation efficiency is 98.1%. The magnetic cobalt catalyst can efficiently catalyze Oxone to degrade the rhodamine B dye wastewater with mass concentration being not less than 25mg.L<-1>, has the advantages of strong absorption catalytic property, stable properties, no toxicity, high efficiency, low price, and the like, can be applied to degradation of poorly biodegradable organic pollutants and has a stronger market application prospect.

Description

technical field [0001] The invention belongs to the technical field of catalytic degradation of organic wastewater, in particular to a method for catalyzing Oxone degradation of rhodamine B dye wastewater by a magnetic cobalt catalyst. Background technique [0002] Rhodamine B is a fluorescent dye based on xanthene. It is widely used in food dyeing, fluorescent labeling and dye coloring because of its non-selective tinting strength and non-fading characteristics. However, subsequent toxicological studies have shown that Rhodamine B has potential carcinogenicity and mutagenicity, and has been banned from being used as a food additive by my country. Rhodamine B dye wastewater is also one of the typical refractory organic wastewater, and the removal effect of conventional biological treatment is not ideal. [0003] Oxone (2KHSO 5 ·KHSO 4 ·K 2 SO 4 ) is the trade name of potassium hydrogen peroxysulfate compound salt, and its active substance is potassium hydrogen peroxysul...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/72B01J23/75
Inventor 皮运清李琦路孙剑辉王汝霞郑丽樊志伟何冰冰王腾赵鹏
Owner HENAN NORMAL UNIV
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