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Preparation method of supported FeOOH catalyst, and electro-Fenton waste water treatment system

A technology for wastewater treatment and catalyst, which is applied in the fields of oxidized water/sewage treatment, chemical instruments and methods, catalysts for physical/chemical processes, etc. Simple, low-cost processing, easy-to-control effects

Active Publication Date: 2011-10-19
DALIAN UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The homogeneous Fenton reaction not only has harsh medium conditions (pH 2.0-4.0), but also has the disadvantage that the homogeneous catalyst is difficult to separate and recover, and a large amount of acid and alkali need to be added before and after the homogeneous Fenton reaction to adjust the pH value of the wastewater. increased operating costs
In addition, a large amount of difficult-to-handle iron sludge produced after the Fenton reaction is mainly composed of Fe(OH) 3 , causing secondary pollution

Method used

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  • Preparation method of supported FeOOH catalyst, and electro-Fenton waste water treatment system
  • Preparation method of supported FeOOH catalyst, and electro-Fenton waste water treatment system
  • Preparation method of supported FeOOH catalyst, and electro-Fenton waste water treatment system

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Embodiment

[0026] (1) Pretreatment of activated carbon carrier

[0027] Firstly, the activated carbon carrier is washed with deionized water for 5-8 times, and then immersed in an aqueous nitric acid solution with a volume ratio of 1:1 for 8-10 hours to remove impurities that may remain on the exchange sites, filtered, and washed with deionized water until The filtrate is neutral; then immerse in 10% sodium hydroxide aqueous solution for 8-10h to dissolve other remaining cations, filter, wash with deionized water until the filtrate is neutral; -1 Soak in dilute hydrochloric acid solution for 1 hour, rinse repeatedly with deionized water until the supernatant water is neutral, and finally put it in a vacuum oven at 90-100°C for 12 hours, take it out and cool it at room temperature, and set aside;

[0028] (2) Preparation of supported FeOOH catalyst

[0029] Prepare 300mL with a concentration of 0.2mol L -1 Fe 2 SO 4 Solution, nitrogen gas 30min to remove dissolved oxygen. Then add 20...

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Abstract

The invention discloses a preparation method of a supported FeOOH catalyst, and an electro-Fenton waste water treatment system. The invention belongs to the technical field of waste water processing. The invention is characterized in that active carbon is utilized as a carrier and ferrous sulphate is utilized as a precursor; through dipping, ethylene diamine tetraacetic acid and ammoniacal undergo an oxidation reduction reaction with active carbon and ferrous sulphate in the presence of oxygen to produce active carbon supported objects and then the active carbon supported objects are washed by deionized water and then are placed in a vacuum oven to be dried at a temperature of 40 to 50 DEG C for 10 to 12 hours to form a supported FeOOH catalyst; active components of the supported FeOOH catalyst comprise alpha-FeOOH and gamma-FeOOH; and under an applied electric field, an out-phase electro-Fenton oxidation system is composed of the supported FeOOH catalyst and hydrogen peroxide and canremove efficiently organic pollutants in waste water. The invention has effects and advantages that an out-phase catalyst can be separated from waste water easily and recycled, and an out-phase electro-Fenton oxidation system can operate in a neutral medium without need of PH adjustment and generation of chemical sludge.

Description

technical field [0001] The invention belongs to the technical field of wastewater treatment, and relates to a heterogeneous electrical Fenton wastewater treatment technology, in particular to a loaded FeOOH catalyst in a heterogeneous electrical Fenton wastewater treatment system and a preparation method thereof. Background technique [0002] The Fenton reaction can generate highly oxidizing hydroxyl radicals, which can quickly and non-selectively convert toxic or refractory organic pollutants into less toxic or easily biodegradable small molecule compounds, improving the biodegradability of wastewater, Even completely mineralize organic pollutants into environmentally friendly CO 2 and H 2 O. Due to the characteristics of simple operation, easy availability of reactants, no need for complicated equipment and environmental friendliness, the Fenton reaction has been widely used in the treatment of printing and dyeing wastewater, textile wastewater, pharmaceutical wastewater...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/745C02F1/72
Inventor 杨凤林张国权徐晓晨付磊王帅
Owner DALIAN UNIV OF TECH
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