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Preparation of a cerium oxide modified red mud catalyst and its application in water treatment technology

A cerium oxide and catalyst technology, which is applied in the field of advanced treatment of heterogeneous catalyzed ozone oxidation and decontaminated water, can solve the problems of low catalytic efficiency and high cost

Active Publication Date: 2015-09-23
BEIJING FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the catalysts currently used generally have low catalytic efficiency, high cost, and certain selectivity, which are difficult to meet actual needs.

Method used

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  • Preparation of a cerium oxide modified red mud catalyst and its application in water treatment technology

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Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0011] Specific Embodiment 1: In this embodiment, the preparation method of the catalyst in the water treatment method of cerium oxide modified red mud catalytic ozonation to remove PPCPs organic matter in water is as follows: (1) Cleaning, washing an appropriate amount of red mud raw ore with distilled water continuously for 5 times Finally, remove the ash on the surface of the raw red mud ore, and dry it at a temperature of 70°C; (2) Preparation of the precursor solution, the precursor of the cerium salt is Ce(NO 3 ) 3 ·6H 2 O or Ce(SO 4 ) 2 4H 2 O or (NH 4 ) 2 Ce(NO 3 ) 6 , the amount of the substance is 5.6-6.0mmol, completely dissolved in 90-110mL of water; (3) impregnation, adding 4.8-5.2g of red mud washed in step (1) to the precursor solution prepared in step (2) , forming a red suspension; place the suspension prepared in step (3) in a water bath at 50-60°C and keep it for 11-13h; increase the temperature of the water bath to 75-85°C and keep it for 9-11h to c...

specific Embodiment approach 2

[0015] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is that the application method of cerium oxide modified red mud catalyst in water treatment is as follows: the polluted water body is first treated with primary sedimentation-aeration biochemical-secondary sedimentation After the secondary treatment, cerium oxide modified red mud catalytic ozonation treatment is carried out, and then the water is discharged after post-treatment.

specific Embodiment approach 3

[0016] Embodiment 3: The difference between this embodiment and Embodiment 1 is that the raw red mud ore in the preparation step (2) of the catalyst is in a block shape. Other steps and parameters are the same as those in Embodiment 1.

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Abstract

The invention provides preparation of a ceria modified red mud catalyst and application thereof in water treatment technologies, belonging to the field of water treatment technologies and environment functional materials. The ceria modified red mud catalyst can be powdery or granular, aluminum industry waste, namely red mud, is taken as a main raw material, and the catalytic activity of red mud is improved by adopting a ceria surface loading method; the ceria modified red mud catalyst can intensify the removal of low-concentration and high-toxicity PPCPs organic pollutants in water by ozone. The ceria modified red mud catalyst is used for solving the problems in the existing catalytic ozone oxidation technologies that a catalyst is poor in activity and high in preparation cost. As a deep water treatment technology, the ceria modified red mud catalytic ozone oxidation technology is simple in process and low in cost and has a good pollutant removal effect on the low-concentration and high-toxicity PPCPs organic pollutants, so that the efficient application of the ceria modified red mud catalyst in the water treatment technologies is facilitated, the purification effect of the conventional water treatment technologies is improved, and a novel, efficient and low-cost water treatment catalyst and a deep treatment technology are provided for the purification of the low-concentration and high-toxicity PPCPs organic pollutants in water.

Description

technical field [0001] The invention relates to a heterogeneous catalytic ozone oxidation decontamination water advanced treatment technology and a preparation method of the catalyst. Background technique [0002] In recent years, new pollutants with "three-caused" effects or endocrine disrupting effects——pharmaceuticals and personal care products (PPCPs) have been continuously detected and found in surface water environments, which has aroused extensive attention from scholars from all over the world. focus on. With the increasing production, usage and discharge of PPCPs in my country, the pollution of PPCPs in the water environment is becoming more and more serious, which poses new challenges to domestic sewage treatment and reuse technology in China. The removal capacity of PPCPs by the conventional domestic sewage treatment process is very limited, even powerless. Therefore, low concentration and high stability PPCPs in water pose a great threat to surface water qualit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/78C02F1/28B01J23/10C02F101/30
Inventor 齐飞李华楠徐冰冰孙德智
Owner BEIJING FORESTRY UNIVERSITY