CN103011335A - Method for treating micro-polluted surface water containing terephthalic acid by virtue of photocatalysis - Google Patents
Method for treating micro-polluted surface water containing terephthalic acid by virtue of photocatalysis Download PDFInfo
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- CN103011335A CN103011335A CN2012104883673A CN201210488367A CN103011335A CN 103011335 A CN103011335 A CN 103011335A CN 2012104883673 A CN2012104883673 A CN 2012104883673A CN 201210488367 A CN201210488367 A CN 201210488367A CN 103011335 A CN103011335 A CN 103011335A
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- terephthalic acid
- photocatalysis
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Abstract
The invention provides a method for treating micro-polluted surface water containing terephthalic acid through adopting modified sintered ceramsite by virtue of photocatalysis. The treating method comprises the following steps of: taking coal gangue sintered ceramsite as a carrier to carry out surface nano TiO2 modification; and applying ultraviolet light catalysis to deeply treat the micro-polluted surface water. A treating device is an interlayer glass container; an interlayer is a photocatalysis reaction unit and is filled by the coal gangue sintered ceramsite modified by TiO2; a quartz glass tube is placed into a photocatalytic reactor and a 25-W ultraviolet lamp tube is placed inside the tube; ultraviolet light is irradiated into the surfaces of wastewater and the sintered ceramsite in the interlayer through the quartz glass tube; two glass tube openings are respectively arranged at the upper and lower sides of the photocatalytic reactor; a water inlet and a water outlet are arranged at the lower part of the photocatalytic reactor; and two water and gas common outlets are arranged at the upper part of the photocatalytic reactor. By utilizing the method disclosed by the invention, the water quality index of the treated micro-polluted water is up to the water quality requirements of national Water Quality Standards of Reused Water of Textile Dyeing and Finishing Industry (FZ/T-1107-2011).
Description
Technical field
The invention belongs to technical field of sewage, be specifically related to the method for a kind of micro-polluted surface water that adopts modification sintering ceramsite photocatalysis treatment to contain terephthalic acid (river, Lake Water).
Background technology
Terephthalic acid (terephthalic acid is called for short TA) as a kind of important Organic Chemicals, is widely used in the fields such as plastics, dyestuff, chemical fibre and agricultural chemicals.In recent years, along with the high speed development of industry, the nervous problem of water environment pollution and water resources is more and more serious.Developing rapidly of the industries such as wherein printing and dyeing, chemical fibre, plastics, so that sharply increase take TA as the discharged volume of industrial waste water of feature pollutent so that some textile industries of China comparatively in the surface water body (river, Lake Water) of developed regions (such as Soviet Union, Zhejiang, the area, Shanghai of the Yangtze River Delta) TA content higher.Surface water after the common process such as employing flocculation, filtration are processed still contains a certain amount of TA as process water in the water, have a strong impact on the quality of textiles.Therefore, it is great to seek efficiently to remove the micro-polluted surface water industrial significance that contains TA.For the industrial production wastewater that contains TA, (being the inventor) such as the Zhang Wenyi of Nanjing University adopt BAF process the TA trade effluent (the patent number of awarding: CN 1958484A), make its qualified discharge and recyclable for the production of.
In recent years, be widely used in sewage disposal take coal gangue, flyash as the sintering ceramsite of raw material.The Photocatalytic Oxidation With Semiconductors technology is owing to have low energy, the advantage such as efficient, pollution-free, especially exceeding conventional biological treatment aspect the organic pollutant processing, thereby becoming the focus in the fields such as home and abroad environment improvement, novel environment friendly developing material.In the middle of multiple semiconductor light-catalyst, nano-TiO
2Nontoxic owing to it, cost is low, stable chemical nature, catalytic activity are high receives much concern.
Summary of the invention
The purpose of this invention is to provide a kind of modification sintering ceramsite ultraviolet catalytic that adopts and processed the method that contains the TA micro-polluted surface water, adopted the TiO of liquid phase deposition preparation take the coal gangue sintering haydite as carrier
2Photocatalyst material take the ultraviolet catalytic reactor as processing unit, reaches textile industry water water quality requirement so that contain the micro-polluted surface water (river, Lake Water) of TA.Indication micro-polluted surface water of the present invention refers to that mainly water body is subject to organic or inorganic and pollutes, and part pollutent index surpasses the water quality requirement of " textile dyeing and finishing industrial reuse water water quality standard " (FZ/T 01107-2011).Technical scheme of the present invention and cardinal principle are as follows:
The present invention carries out nano surface TiO take the coal gangue sintering haydite as carrier
2The micro-polluted surface water that the ultraviolet catalytic advanced treatment contains TA is used in modification, adopts the modification sintering ceramsite that micro-polluted surface water is carried out the photochemical catalysis advanced treatment.Micro-polluted surface water enters photo catalysis reactor from the bottom, in the middle of the reactor ultraviolet lamp is arranged, and is full of the modification sintering ceramsite in the water body.Nano-TiO under the UV-irradiation
2The strong oxidation capacity that film produces can not only make most of organism obtain degraded, but also has good sterilising effect.Simultaneous reactions device bottom aeration agitation makes the sintering ceramsite of high-specific surface area be in quick condition, thereby makes TiO
2Film surface fully contacts with organic molecule, greatly increases mass transfer and the analytic function of each reactive material, thereby can guarantee TA, COD in the water
Mn, NH
3The clearance of-N and bacterium etc.The photochemical catalytic oxidation medium carries out the photochemical catalytic oxidation pre-treatment to the micro-polluted surface water that contains TA, so that the water quality after processing has reached the water quality requirement of country " textile dyeing and finishing industrial reuse water water quality standard " (FZ/T 01107-2011).
The present invention is to TA, COD in the micro-polluted surface water
MnAnd NH
3The removal of pollutants mechanism such as-N are based on following 2 points:
The first, the haydite of making through sintering take coal gangue as main component not only satisfies water treatment for the basic demand of sintering ceramsite, and has obvious mineralogy crystal characteristic.The essential mineral composition of coal gangue belongs to the silicate of laminate structure take clay mineral and quartz as main more, has good absorption and adhesive property, the COD in can well Adsorption water
MnAnd NH
3The pollutents such as-N.Simultaneously its many micropores in sintered product surface, large, the stable performance of roughness is so that the micro-polluted surface water treatment effect is stable.
The second, the coal gangue sintering haydite is carried out TiO
2Modification makes its surface property obtain changing, simultaneously the surperficial TiO that covers
2Thin film layer can also as much as possible because rayed activates, be conducive to photocatalytic activity and TiO
2The raising of utilization ratio strengthens sintering ceramsite to COD
Mn, bacterium interception capacity.TiO
2Particle excites under illumination and produces light induced electron and hole h
Vb +, and move to photocatalyst surface, with H
+, O
2, H
2The effects such as O produce the free radicals such as OH, and the pollutent effect by free radical and absorption redox reaction occurs, catalyzed degradation TA, COD
MnWith ammonia nitrogen etc., thereby most organic pollutants and part inorganics finally are oxidized to the inorganic molecules such as carbonic acid gas and water.Take to the removal of ammonia nitrogen as example, main process can be expressed as:
OH
-+h
vb +→·OH
H
2O+h
vb +→·OH+H
+
NH
3+x·OH→NH
3-x+xH
2O
NH
x+NH
y→N
2H
x+y
N
2H
x+y+(x+y)h
vb +→N
2↑+(x+y)H
+。
Simultaneously, modified filter material has been strengthened the absorption to electronegative bacterium, ultraviolet excitation TiO
2Film produces electronics and hole (h
Vb +), and with the OH of its surface adsorption
-And O
2Effect generates active hydroxyl radical free radical OH and free radical O
2 -, cell that can bacterium that directtissima is met.Take OH as example, OH has very strong oxidation capacity, OH attacks organic unsaturated link(age) or extracts its H atom, the new free radical that reaction produces will excite the carrying out of chain reaction, so that bacterioprotein variation, simultaneously lipid obtains decomposing, and dna structure variation, the function that causes bacterial cell destroyed and reached the effect of sterilization.
Main sterilization reaction process can be expressed as:
The photo catalysis reactor that the present invention adopts is Sandwiched glass vessel, and interlayer is photocatalytic reaction unit, and filling is through TiO
2The coal gangue sintering haydite of modification.A quartz glass tube that is about 50cm is inserted in photo catalysis reactor inside, the inner ultraviolet lamp tube of placing a 25W of pipe, waste water and the sintering ceramsite surface of UV-light in quartz glass tube is injected interlayer.Both sides respectively are provided with the glass mouth of pipe of 2 about 1cm of internal diameter about the device, water-in of the inlet mouth in bottom, and two on top is all the aqueous vapor common outlet, adopts simultaneously air pump to carry out aeration oxygen replenishing and stirs, and gas-vapor mix stream is flowed out by upper orifice.
Sintering ceramsite of the present invention is the coal gangue sintering haydite, particle diameter 3～6mm, and apparent density is about 1.5g/cm
3, specific surface area is about 5m
2/ g.The present invention utilizes the ammonium titanium fluoride liquid phase deposition that the coal gangue sintering haydite is carried out TiO
2Modification, best modified condition is: molar concentration rate [c (NH
4)
2TiF
6]: [c (H
3BO
3)]=1:3 ((NH
4)
2TiF
6Concentration is 0.1mol/L), 80 ℃ of temperature of reaction, 450 ℃ of thermal treatment temps, heat treatment time 2h.
Embodiment
Table 1 is 5 embodiment of the present invention.
Table 1 adopts the processing of modification sintering ceramsite to contain TA micro-polluted surface water embodiment
In the photocatalytic reaction unit of the about 250ml of volume, pour the pending water sample of an amount of concentration known into, then wadding warp TiO
2The coal gangue sintering haydite of modification, sintering ceramsite is full of whole reaction member.Open ultraviolet lamp and air pump, through certain light application time post-sampling, and measure its reaction front and back TA, COD
MnAnd NH
3The desired values such as-N.Under the processing condition such as different starting point concentrations, aeration and illumination, process simultaneously the micro-polluted surface water that contains TA.TA 3～50mg/L in the micro-polluted water, COD
Mn3～50mg/L, pH 6 ~ 8, total plate count 1.6 * 10
4Individual～1.9 * 10
4Individual, NH
3About 7.0～the 8.0mg/L of-N.Initial TA concentration is 20mg/L in micro-polluted water, COD
MnConcentration is 30mg/L, NH
3-N concentration is 7.54mg/L, total plate count about 1.6 * 10
4When individual, illumination 4 hours and aeration, the TA clearance is about 95%, COD
MnClearance is about 70%, and sterilization rate is up to more than 99%, and the water outlet total plate count is below 100, NH
3-N clearance is nearly 50%, has reached the water quality requirement of country " textile dyeing and finishing industrial reuse water water quality standard " (FZ/T 01107-2011).
Claims (1)
1. one kind is adopted modification sintering ceramsite ultraviolet catalytic to process the method that contains the terephthalic acid micro-polluted surface water, it is characterized in that, take the coal gangue sintering haydite as carrier, carries out nano surface TiO
2The micro-polluted surface water that the ultraviolet catalytic advanced treatment contains terephthalic acid is used in modification, makes little sewage after the processing reach the water quality requirement of country " textile dyeing and finishing industrial reuse water water quality standard " (FZ/T 01107-2011).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104883673A CN103011335A (en) | 2012-11-26 | 2012-11-26 | Method for treating micro-polluted surface water containing terephthalic acid by virtue of photocatalysis |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104883673A CN103011335A (en) | 2012-11-26 | 2012-11-26 | Method for treating micro-polluted surface water containing terephthalic acid by virtue of photocatalysis |
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| Publication Number | Publication Date |
|---|---|
| CN103011335A true CN103011335A (en) | 2013-04-03 |
Family
ID=47960516
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012104883673A Pending CN103011335A (en) | 2012-11-26 | 2012-11-26 | Method for treating micro-polluted surface water containing terephthalic acid by virtue of photocatalysis |
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|---|---|
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108996602A (en) * | 2018-08-23 | 2018-12-14 | 曹立军 | Water body purification plate based on gangue and preparation method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1686095A1 (en) * | 2005-01-31 | 2006-08-02 | Universidad Católica de la Santisima Concepción | Photocatalytic reactor with a modular configuration and advanced oxidation process for purifying and disinfecting wastewater from aquaculture |
| CN102249366A (en) * | 2011-04-22 | 2011-11-23 | 上海理工大学 | Method for processing PAEs (phthalate esters) wastewater by TiO2/13X/ MCM-41 micro mesoporous composite materials |
-
2012
- 2012-11-26 CN CN2012104883673A patent/CN103011335A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1686095A1 (en) * | 2005-01-31 | 2006-08-02 | Universidad Católica de la Santisima Concepción | Photocatalytic reactor with a modular configuration and advanced oxidation process for purifying and disinfecting wastewater from aquaculture |
| CN102249366A (en) * | 2011-04-22 | 2011-11-23 | 上海理工大学 | Method for processing PAEs (phthalate esters) wastewater by TiO2/13X/ MCM-41 micro mesoporous composite materials |
Non-Patent Citations (2)
| Title |
|---|
| 张彭义等: "苯甲酸类物质的光催化降解及其QSAR", 《上海环境科学》 * |
| 张文艺等: "煤矸石烧结滤料TiO2改性及其光催化特性", 《煤炭科学技术》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108996602A (en) * | 2018-08-23 | 2018-12-14 | 曹立军 | Water body purification plate based on gangue and preparation method thereof |
| CN108996602B (en) * | 2018-08-23 | 2021-11-12 | 陕西龙宾立为生态科技有限公司 | Coal gangue-based water body purification plate and preparation method thereof |
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Application publication date: 20130403 |