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Preparation method and application of multifunctional material for water treatment

A multi-functional, water treatment technology, applied in biological water/sewage treatment, adsorbed water/sewage treatment, water/sludge/sewage treatment, etc. It can solve the problem of co-treatment of sludge without iron oxide, increase cost, and reduce hydroxyl free radicals. It can achieve the effect of resource utilization, convenient operation and simple process

Active Publication Date: 2014-11-19
DALIAN UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Water treatment materials directly prepared by the reuse of transition metal oxide compound-doped fly ash can reduce the effect of hydroxyl radical inhibitors, and can be applied to organic wastewater such as coal chemical industry and dyes containing alcohols such as methanol and isopropanol. The research and technology of catalytic oxidation degradation have not received due attention
At the same time, these studies all use fly ash as a carrier to load heavy metals and precious metal ions or oxides, which increases the cost and lacks the improvement of the method of improving the specific surface of fly ash, which inhibits its potential functions and fails to achieve its own good performance. effect, and there is no report on the co-treatment of iron oxide sludge

Method used

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  • Preparation method and application of multifunctional material for water treatment
  • Preparation method and application of multifunctional material for water treatment
  • Preparation method and application of multifunctional material for water treatment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Immerse the high-alumina fly ash with organic acid such as oxalic acid for 2 hours, the concentration of oxalic acid is 3%, and continuously add to control the pH below 1 for 3 hours; after stopping the acid addition, the temperature rises to 90°C, and maintains the pH at about 5 for 2 hours, and Basically unchanged, it is dried after filtration and used as base material A for later use. Use the above waste acid, iron mud and ferrous sulfate to prepare iron mud with a molar ratio of 1:2.2 in the supernatant Fe(II) / Fe(III), adjust the vacuum degree and alkalinity, and obtain black iron oxide powder as a base material b.

[0023] Weigh 100g of base material A and add the above base material B and stir for 5 hours. The mass of black iron oxide accounts for about 10% of the total mass, and then filter, wash and dry the above mixed material. Its preparation process is as follows: take 100 parts of dried base material A and base material B with a solid content of about 10 g,...

Embodiment 2

[0029] Iron mud and ferrous sulfate were used to prepare black iron mud with a supernatant Fe(II) / Fe(III) molar ratio of 1:2. The preparation steps of the following water treatment materials are the same as above. Weigh 5g of the above water treatment material and add it to a methyl orange aqueous solution with a concentration of 10mg / L and a volume of 50ml, add 150mg / L of 30-40% H 2 o 2 Aqueous solution, adjust pH to 3, Fenton-like reaction oxidative degradation for 2h. The UV-Vis spectrum curve of Fenton-like oxidation degradation of methyl orange is shown in the figure.

Embodiment 3

[0031] Use iron mud and ferrous sulfate to prepare black iron mud with a molar ratio of 1:2.5 of the supernatant Fe(II) / Fe(III), and common fly ash 400 mesh, add alumina powder (200 mesh) to prepare High alumina fly ash containing more than 45% alumina.

[0032] Weigh 100 parts of high-alumina fly ash and add it to a black iron slurry solution with a solid content of about 7g, stir and mix for 5 hours, then filter, wash and dry. Its preparation process is as follows: weigh 100 parts of dry mixture, grind evenly, then add 10 parts of kaolin, 28 parts of water glass (30-40%) and 1.5 parts of liquid paraffin, 2 parts of white glue, 3 parts of vegetable rubber powder, and stir well until uniform, mixed into balls, dried the obtained water treatment material at 120°C for 2 hours, and then anaerobically calcined at 500°C for 3 hours to obtain the water treatment material.

[0033] The chemical composition of ordinary fly ash is shown in the table below.

[0034] Analysis results o...

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Abstract

The invention provides a preparation method and an application of a multifunctional material for water treatment, and belongs to technical field of resource recycling and environments. The preparation method comprises the following steps: modifying the surface of high-alumina fly ash by utilizing an organic acid so as to obtain modified high-alumina fly ash serving as a base material 1; compounding an acidic liquid obtained by separating, iron sludge and ferrous sulfate to adjust the ratio of Fe(II) to Fe(III) in the solution to be 1: (1.5-3.0); adjusting the alkalinity under a vacuum condition and performing coprecipitation to obtain black iron mud serving as a base material 2; mixing the base material 1, the base material 2, kaolin, sodium silicate, liquid paraffin, white glue and plant gelatin powder in the mass ratio of (1-20):100:(15-20):(25-40):(2-3):(0.5-3):(1-5) to obtain a mixture, curing the mixture by adopting two-section sintering, and finally washing and drying to obtain the multifunctional material for the water treatment. The multifunctional material for the water treatment integrates the effects of an adsorbent, a catalyst, bio-bed packing and an additive for reducing a hydroxyl free radical inhibitor, and the like.

Description

technical field [0001] The invention belongs to the technical field of resource recovery and utilization and the environment, and relates to a kind of waste materials such as iron sludge and fly ash as raw materials, and synergistically utilizes to prepare polycarbonate with the functions of adsorption, catalysis and reduction of hydroxyl inhibitors in the oxidation process and biological treatment fillers. Functional water treatment materials and their application methods in industrial water supply and sewage treatment such as chemical wastewater, dye wastewater and circulating water. Background technique [0002] The utilization of iron sludge and fly ash waste produced by the iron brine treatment agent solves the difficult problems of final disposal of physical sludge in wastewater treatment plants and waste disposal of coal-fired power plants and their boilers. It is an effective way to improve the utilization of valuable elements and reduce pollution by utilizing the sy...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/10B01J20/30C02F1/28C02F3/10B01J23/745
CPCY02W10/10
Inventor 马伟宗盼盼程子洪沙学龙王刃徐军段诗博孟凡庆
Owner DALIAN UNIV OF TECH
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