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Preparation and application of Fenton promoter for continuous flow drug wastewater treatment

A co-catalyst and wastewater treatment technology, which is applied in the field of water treatment, can solve the problems of low wastewater treatment efficiency and difficulty in using nano-catalysts, and achieve the effects of promoting iron ion circulation, excellent structural strength, and avoiding easy loss

Pending Publication Date: 2022-07-15
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The molybdenum sulfide-modified functional ceramic membrane prepared by the invention has rich pore structure and excellent mechanical strength, contains a large number of reducing active sites, can efficiently promote the circulation of iron ions in the Fenton reaction, and improve the utilization rate of oxidant; it is used in continuous flow wastewater The treatment reactor can realize the removal of suspended solids and the simultaneous degradation of organic pollutants in actual wastewater, and solve the key technical problems that nano-catalysts are difficult to use in continuous flow wastewater treatment reactors and the traditional Fenton system has low efficiency in wastewater treatment

Method used

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  • Preparation and application of Fenton promoter for continuous flow drug wastewater treatment
  • Preparation and application of Fenton promoter for continuous flow drug wastewater treatment
  • Preparation and application of Fenton promoter for continuous flow drug wastewater treatment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038]Prepare 25mL (0.05M) ammonium molybdate solution and 25mL (0.1M) thiourea solution, disperse and mix them uniformly by ultrasonic for 20min, and transfer them into a 100mL polytetrafluoroethylene reactor; use 100mL deionized water to wash the discarded The tubular ceramic membrane was dried in an oven at 60°C. The size of the tubular ceramic membrane was Φ3.0cm×2.0cm×5.0cm (outer diameter*inner diameter*height, hollow structure, membrane volume was 20mL), and the pore size was 30μm , the porosity is 43%, and then the dried tubular ceramic membrane is transferred to the above mixed reaction solution; finally, the polytetrafluoroethylene reaction kettle is sealed and placed in a 200 ℃ oven for hydrothermal reaction for 8 hours to obtain molybdenum sulfide. Modified Functional Ceramic Membranes (MoS x / CM) (eg figure 1 and figure 2 shown).

Embodiment 2

[0040] Prepare 12mL (0.2M) ammonium molybdate solution and 12mL (1.0M) thiourea solution, disperse uniformly and mix them by ultrasonic for 20min, transfer them into a 50mL polytetrafluoroethylene reactor; use 100mL deionized water to wash the discarded The tubular ceramic membrane was dried in an oven at 60°C. The size of the tubular ceramic membrane was Φ1.2cm×0.8cm×3.0cm, the pore size was 0.5μm, and the porosity was 28%. Then the dried tubular ceramic membrane was dried. Transfer to the above mixed reaction solution; finally, seal the polytetrafluoroethylene reaction kettle and place it in a 150 °C oven for hydrothermal reaction for 20 h, to obtain a functional ceramic membrane (MoS) modified with molybdenum sulfide. x / CM) (eg image 3 shown).

Embodiment 3

[0042] (1) One end of the functional ceramic membrane prepared in Example 1 was sealed as the bottom; then, it was used as a Fenton co-catalyst and placed in the reaction chamber of the continuous flow wastewater treatment reactor, and the diameter of the reaction chamber was 11.0 cm, The height is 5.0cm, and the plexiglass on the upper layer of the reaction chamber is provided with uniformly distributed holes that are consistent with the size of the functional ceramic membrane in Example 1, and the diameter of the holes is 3.0cm (such as Figure 4 );

[0043] (2) Taking 10 mg / L clothianidin wastewater (simulated pharmaceutical wastewater) as the treatment object, the concentration of iron ions in the wastewater is 0.04 mM, and the concentration of hydrogen peroxide is 0.4 mM, through the valve set in the continuous flow wastewater treatment reactor Conditioning wastewater in MoS x The residence time in the / CM channel was set to 8 min. After the reactor runs for 60 hours, t...

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Abstract

The invention provides a preparation method and application of a Fenton cocatalyst for continuous flow organic wastewater treatment, the Fenton cocatalyst takes thiourea and ammonium molybdate as reactants to prepare a reaction liquid, takes a tubular ceramic membrane as a support material, and transfers the reaction liquid and the tubular ceramic membrane into a polytetrafluoroethylene reaction kettle together, and the reaction liquid is heated to 80-90 DEG C; and carrying out a hydrothermal reaction to obtain the molybdenum sulfide modified functional ceramic membrane MoS < x > / CM. The molybdenum sulfide modified functional ceramic membrane prepared by the method has rich pore structures and excellent mechanical strength, contains a large number of reducing active sites, can efficiently promote iron ion circulation in Fenton reaction, and improves the utilization rate of an oxidizing agent; when the nano-catalyst is applied to a continuous flow wastewater treatment reactor, removal of suspended solids and synchronous degradation of organic pollutants in actual wastewater can be realized at the same time, and the key technical problems that the nano-catalyst is difficult to be applied to the continuous flow wastewater treatment reactor and a traditional Fenton system is low in wastewater treatment efficiency are solved.

Description

technical field [0001] The invention relates to the technical field of water treatment, in particular to the preparation and application of a Fenton co-catalyst for continuous flow pharmaceutical wastewater treatment, which is suitable for rapid treatment of pharmaceutical excess water and other organic wastewater. Background technique [0002] Neonicotinoids are the most widely used pesticides in the world and are widely used in agricultural production to control insect pests through seed soaking and foliar spraying. In recent years, water quality surveys have found that the extensive use of a variety of neonicotinoid drugs has led to their detection in lakes and drinking water. Studies have shown that a variety of neonicotinoid drugs have synergistic effects, which will make them show strong toxicity at low concentrations, and the residues of these drugs cause serious potential harm to human safety. [0003] Fenton technology is a water treatment technology with simple op...

Claims

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Application Information

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IPC IPC(8): B01J27/051B01J37/10C02F1/44C02F1/72C02F101/38C02F101/30
CPCB01J27/051B01J37/10C02F1/44C02F1/722C02F1/725C02F2305/026C02F2101/38C02F2101/40C02F2101/306
Inventor 王志伟伊秋颖李洋李胄彦
Owner TONGJI UNIV
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