Sewage purifying agent with photocatalysis and coagulation composite performance and application thereof

A sewage purifier and photocatalytic technology, applied in the direction of light water/sewage treatment, oxidized water/sewage treatment, flocculation/sedimentation water/sewage treatment, etc., can solve the problem of low utilization rate of visible light, low utilization rate of light energy, quantum Low efficiency and other problems, to achieve the effect of simple use, fast decomposition speed, and high-efficiency purification effect

Active Publication Date: 2017-10-13
INST OF AGRI ENG TECH FUJIAN ACAD OF AGRI SCI
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Problems solved by technology

Titanium dioxide is the semiconductor photocatalyst that has received the most attention so far. It not only has high activity and good thermal stability, but also has stable chemical properties and strong photooxidation resistance. However, the spectral response range is limited to the ultraviolet region, and there is quantum efficiency in practical applications. Low, light energy utilization rate is not high, the utilization rate of visible light is low

Method used

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  • Sewage purifying agent with photocatalysis and coagulation composite performance and application thereof
  • Sewage purifying agent with photocatalysis and coagulation composite performance and application thereof

Examples

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Effect test

Embodiment 1

[0027] The preparation of the composite purifying agent with photocatalytic degradation performance:

[0028] (1) Adjust the pH of the 20 wt% sodium silicate solution to 3 with 0.1 mol / L dilute sulfuric acid, then stop stirring, and stand for polymerization at 40 °C for 1 h to obtain an activated polysilicic acid solution;

[0029] (2) At room temperature, measure and mix 8.5 mL of butyl titanate with 20 mL of absolute ethanol, which is recorded as solution A, and measure and mix a solution consisting of 20 mL of anhydrous ethanol, 5 mL of glacial acetic acid and 2.5 mL of deionized water. , denoted as solution B, solution A was added dropwise to solution B, stirred continuously until the dropwise addition was completed, and stood for 0.5 h to form a uniform and transparent sol; 2 h, the obtained dry gel powder was placed in a muffle furnace, heat-treated at 500 °C for 3 h, ground and sieved to obtain nano-TiO 2 powder;

[0030] (3) Add 7.27 g of ferric nitrate nonahydrate t...

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Abstract

The invention belongs to the technical field of environment-friendly materials, and particularly relates to a sewage purifying agent with photocatalysis and coagulation composite performance and application thereof. Titanium dioxide powder is prepared through butyl titanate hydrolysis and then is compounded with iron trioxide, and finally a nanometer Fe2O3-TiO2 composite material is chelated with a polysilicic acid solution, aluminum chloride and iron chloride together to prepare the sewage purifying agent of modified titanium dioxide chelated polysilicate aluminum ferrite. The sewage purifying agent prepared by the invention has a coagulation performance as well as an efficient photocatalysis and oxidization performance,can photocatalytically degrade sewage, such as organics with high concentration, ammonia-nitrogen wastewater and heavy metals, and has a very good practical application prospect.

Description

technical field [0001] The invention belongs to the technical field of environmental protection materials, and in particular relates to a sewage purifying agent with composite properties of photocatalytic degradation and coagulation and its application. Background technique [0002] Since the 20th century, the rapid economic development and large-scale industrial production have brought a huge negative effect - the deterioration of the earth's ecology. At present, governments of various countries have realized the seriousness of environmental problems, and have raised a series of problems such as environmental purification and energy development to a height related to the survival and development of the country. Therefore, research and technology development in this area have attracted worldwide attention. [0003] In industrial production, the pollution of food industry wastewater is worthy of attention, such as candied food processing wastewater pollution. In the producti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/52C02F1/30C02F1/72C02F101/16C02F101/20C02F101/30C02F103/06C02F103/20C02F103/22C02F103/32
Inventor 陈彪肖艳春黄婧魏云华钱庆荣张燕青林香信
Owner INST OF AGRI ENG TECH FUJIAN ACAD OF AGRI SCI
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