CN103626278B - A kind of method of inexpensive fast deep degrading organic dye waste water - Google Patents

A kind of method of inexpensive fast deep degrading organic dye waste water Download PDF

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CN103626278B
CN103626278B CN201310204545.XA CN201310204545A CN103626278B CN 103626278 B CN103626278 B CN 103626278B CN 201310204545 A CN201310204545 A CN 201310204545A CN 103626278 B CN103626278 B CN 103626278B
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waste water
sodium
sodium bismuthate
silver oxide
bismuth
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CN103626278A (en
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喻恺
罗启仕
孙成
杨绍贵
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Nanjing University
Shanghai Academy of Environmental Sciences
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Nanjing University
Shanghai Academy of Environmental Sciences
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00—Technologies for wastewater treatment
    • Y02W10/30—Wastewater or sewage treatment systems using renewable energies
    • Y02W10/37—Wastewater or sewage treatment systems using renewable energies using solar energy

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Abstract

The invention discloses a kind of method of inexpensive fast deep degrading organic dye waste water.This method is：（A）Grid removal of impurities, staticly settle, regulation pH value to 6~11；（B）After waste water introduces reaction vessel, sodium bismuthate and the bismuth silver oxide of silver nitrate synthesis are added, keeps the homogeneous hybrid reaction of multiphase, temperature room temperature, pressure normal pressure, centrifugation discharge after waste water decolourizes substantially under agitation；（C）Epimere water outlet introduces another reaction vessel, and sodium bismuthate is added by 0.75~2g/L, the stirring reaction under sunshine irradiation, the waste water discharge after processing；Wherein bismuth silver oxide presses sodium bismuthate:Silver nitrate is (2.5~3.5):1 weight is than synthesis.The present invention is using sodium bismuthate Quick Oxidation and the step combination method processing waste water from dyestuff of sodium bismuthate catalysis sunshine mineralising two, decolouring, degraded, the target of mineralising waste water from dyestuff can be reached in a short time, the synthesis ratio of wherein bismuth silver oxide is optimized, depth degradation is carried out using solar irradiation, cost is lower, while the photocatalysis efficiency of sodium bismuthate is improved.

Description

A kind of method of inexpensive fast deep degrading organic dye waste water
Technical field:
The invention belongs to dye wastewater treatment technology field, is related to a kind of processing method of organic dye waste water, specifically relates to A kind of and method of inexpensive fast deep degrading organic dye waste water.
Background technology：
With printing and dyeing and the development of dye industry, world's annual production of dyestuff is about 80~900,000 tons, and China's dyestuff is produced per year For amount up to 150,000 tons, position is at the forefront in the world（The harm and watershed management behave of dyeing waste water, Zhu Hongfei, environmental science and management, 2007）.The species of dye composition is various, wherein the overwhelming majority is organic dyestuff, they are widely used in multiple technologies neck Domain, being related to each branch includes：Leather industry, papermaking, food technology, agricultural, optical arrays, photoelectrochemical cell etc..Dyestuff it is big Amount production causes seriously to pollute with use to water body environment, and the dyestuff of as shown by data about 2% is in process of production with sewage It is expelled directly out, and 10% (Singh, K. is lost in follow-up dyeing course;Arora, S.Removalofsynthetictextiledyesfrom wastewaters: acriticalreviewonpresenttreatmenttechnologies[J].CriticalReviews inEnvironmentalScienceandTechnology,2011,41,(9):807-878).Waste water from dyestuff typically has following Feature：(1) high chroma.The organic matter overwhelming majority in waste water be using aromatic groups such as benzene, naphthalene, green onion, quinones as parent, it is and most With colour developing group, color is very deep, there is very strong pollution sense；(2) high toxicity.Many raw materials and by-product are usually contained in its waste water Some are high for product, such as halides, nitro compounds, amino substance, aniline, the serial organic matter of phenols and sodium chloride, sodium sulphate, sulfide etc. The inorganic salts of concentration, there is larger toxicity.Because improvement rate is low, vision that the development of dye industry is not only brought to water environment Pollution, and severely impact aquatile and grown with microorganism, while to human health damage also quite big (Wang Ziqi, Feng Harm Journal of Sex Research [J] chemical industry labour protections of abundant front yard dye class chemical substances：Industrial hygiene and occupational disease fascicle -1998 years 1 Phase).
Traditional dye waste water treatment method mainly has absorption method, chemical coagulation process, membrane separation process, and aerobic/anaerobic Biological treatment etc., first three methods are all using the principle of enrichment concentration, do not remove dyestuff contaminant, biological treatment really The some dyes pollutant although method can degrade, because most of waste water from dyestuff has, organic concentration is high, biodegradability is poor Even there is the features such as bio-toxicity so that the degradation rate of traditional biological facture and efficiency unsatisfactory (Dong Qiuhua, Liu Bright sun, a .TiO in Zhao2The degraded course of catalytic degradation crystal violet probes into [J] Environmental science and technologies, 2010,33 (9):67- 70).In addition, research most widely also has chemical decolorization method, dye molecule is oxidized in chemical degradative processes, resolves into nothing Color small molecule, such as carbon dioxide, water, nitrogen, aldehyde, acid and sulfate dye structure.The chemical oxidation of gold of organic dyestuff generally relates to And using oxidant, such as chlorine and chlorine dioxide, ozone, hydrogen peroxide etc..When such conventional chemical method for oxidation stops to waste water Between require length, degradation effect is limited, may can also produce the higher metabolite of the toxicity such as chlorinatedorganic.High-level oxidation technology The living radical with strong oxidizing property can be produced, many Stability Analysis of Structures can be made, the difficult organic substance decomposed of microorganism is converted into Nontoxic terminal product, such as carbon dioxide, water and inorganic ions, in recent years as the research heat of dye wastewater treatment Point.But higher equipment investment and operating cost seriously limit commercialization practical application (Xue Xiuling, the Fan Guo of this technology Envelope, for example eastern supported titaniums of Liu2-xNxPreparation characterization and visible light photocatalytic degradation methylene blue [J] Environmental Chemistries, 2011,30 (6):1152-1156)。
Perovskite type metal oxide because stable crystal structure, unique electromagnetic performance and higher oxidation also Original, hydrogenolysis, isomerization, electro-catalysis isoreactivity and be widely used in the fields such as environmental protection and Industrial Catalysis.Wherein, sodium bismuthate is A kind of excellent performance, widely used new material, research find that it has higher visible light catalysis activity, are utilizing the sun Can green curb environmental pollution it is middle demonstrated wide application prospect (Kako T, ZouZG, KatagiriM, etal.DecompositionoforganiccompoundsoverNaBiO3undervisiblelightirradiation [J].ChemistryofMaterials,2007,19(2):198-202).But solar radiation photocatalytic degradation technical finesse dyestuff gives up One objective problem of water is when chroma in waste water is higher, the transmittance of sunshine may because of dyestuff shielding action and Weaken, so as to influence the final process effect of the technology (Selli, E.Synergisticeffectsofsonolysiscombinedwithphotocatalysisinthe degradationofanazodye[J].PhysicalChemistryChemicalPhysics.2002,4(24),6123- 6128.).Patent No. ZL200910029442.8 describes the feelings that sodium bismuthate only contacts with the mixed reactant of silver nitrate in stirring Just can degradation of triphenylmethane dye under condition.This method utilizes the oxidisability of sodium bismuthate, it is not necessary to external energy, to waste water from dyestuff Decolorization rate it is very fast, but depth mineralization ability is limited.
As can be seen here, existing Organic Dyestuff Wastewater Treatment technique is of a relatively high to the demand of energy consumption, will to consersion unit Ask relative complex, and dye wastewater degradation method of the above two based on sodium bismuthate（That is sodium bismuthate Quick Oxidation method and sodium bismuthate Sunlight catalytic mineralising method）There is respective excellent, shortcoming, it is undesirable that a kind for the treatment of effect therein is used alone.
The content of the invention：
The technical problem to be solved in the present invention is：A kind of overcome the deficiencies in the prior art, there is provided oxidation by sodium bismuthate Performance organically combines with sunlight catalytic capability, the method for inexpensive fast deep degrading organic dye waste water.
Technical scheme is as follows：
A kind of method of inexpensive fast deep degrading organic dye waste water, carried out by following process：
（A）Grid removal of impurities, staticly settle, regulation pH value to 6~11 or so；
（B）After waste water introduces reaction vessel, sodium bismuthate and the bismuth silver oxide of silver nitrate synthesis are added, in the effect of stirring The lower holding homogeneous hybrid reaction of multiphase, the temperature of waste water from dyestuff is maintained at room temperature during being somebody's turn to do, and pressure is normal pressure, and waste water takes off substantially Discharge is centrifuged after color, into next handling process；
（C）Epimere water outlet introduces another reaction vessel, adds sodium bismuthate as catalyst, is stirred under the irradiation of sunshine Reaction, the waste water after after-treatment is discharged afterwards.
Sodium bismuthate is Yellow amorphous powder, not soluble in water, has strong oxidizing property in acid medium, can directly buy.Nitre Sour silver is a kind of water white transparency rhomboidal crystal or white fine crystallization, is a kind of conventional chemical reagent.By sodium bismuthate:Silver nitrate is (2.5~3.5):1 part by weight synthesis bismuth silver oxide, and added in pretreated waste water, the oxide energy Fast degradation organic wastewater under agitation.Technique B residence time and the total input amount of bismuth silver oxide regard waste water from dyestuff concentration and Fixed, dyestuff decolourizes to stop substantially, long reaction time and excessive bismuth silver oxide dosage, will not be to final effect It is significantly improved.Sodium bismuthate in technique C（NaBiO3）The concentration that adds be 0.75~2g/L, excessive solid catalyst particle meeting Illumination is scattered, reduces photocatalytic degradation efficiency.Recyclable step after reaction（B）With（C）In bismuth silver oxide and sodium bismuthate Catalyst, it is continuing with.
Beneficial effects of the present invention：
The present invention is organic using sodium bismuthate Quick Oxidation and method processing associated with the step of sodium bismuthate catalysis sunshine mineralising two The synthetic method of bismuth silver oxide is simple in waste water from dyestuff, wherein Quick Oxidation step, can be right in the case of mixing Organic dye waste water quick decolorization, improve the sodium bismuthate sunlight catalytic efficiency in subsequent step.Set used in the method for combined use It is standby simple, energy consumption is low, it is easy to operate, decolouring, degraded, the target of mineralising waste water from dyestuff can be reached in a short time.
Compared with the prior art, beneficial effects of the present invention are also embodied in：
（1）The present invention can be carried out, by integrating based on sodium bismuthate under normal temperature to the strong applicability of organic dye waste water Two kinds of different dyestuff biodegrading process, can efficient depth ground most of organic dyestuff of degrading, non-secondary pollution, realize that advantage is mutual Mend, wherein the synthesis ratio of bismuth silver oxide and add concentration and optimized, make technique B degradation efficiency and cost control equal Get a promotion.
（2）The inventive method is without such as microwave, ultrasound and ultraviolet auxiliary energy, it is only necessary to solution is stirred, by Solar irradiation carries out depth degradation, consumes electric energy compared to artificial light source, is further optimized using sunshine cost, while bismuth Sour sodium can be utilized to ultraviolet light in solar spectrum and visible ray, and photocatalysis efficiency is improved.
（3）Used oxidant in the present invention（Bismuth silver oxide）And catalyst（Sodium bismuthate）Can repeatedly it be used continuously, It is high without regeneration, activity.Associated with raw material needed for two handling process be sodium bismuthate, prepare it is simple, it is cheap, be easy to big Large-scale production uses.
（4）A whole set of system operating cost is very low, simple to operate.
Embodiment
Below by way of specific embodiment, the invention will be further described.
Embodiment 1：
Prepare 60mg/L crystal violet aqueous solution dye wastewaters（Solution belongs in the range of 6~11 without removal of impurities, pH value）, Measure 200mL and load technique（B）In reactor.Weigh 0.15g sodium bismuthates and synthesize bismuth silver oxide with 0.05g nitric acid silver reactions, And put into reactor and start to react in the presence of stirring.Crystal violet solution is determined in direct oxidation after reacting 45min Percent of decolourization and mineralization rate under effect.
60mg/L crystal violet aqueous solution dye wastewaters are prepared, 200mL is equally measured and loads technique（C）In reactor. Weigh 0.15g sodium bismuthates（0.75g/L）It is blended in dye solution under solar irradiation and reacts 45min, measure crystal violet solution exists Percent of decolourization and mineralization rate under sunlight catalytic effect.
The crystal violet solution of same concentrations and volume is finally configured, with identical direct oxidation agent usage amount（0.15g bismuthic acids Sodium and 0.05g silver nitrates）Technique（B）React 15min.In the sunlight catalytic of 0.15g sodium bismuthates after dye solution centrifugation Effect is lower to carry out technique（C）30min is reacted, finally determines the percent of decolourization and mineralization rate of crystal violet solution.
It 0.15g, reaction time is all 45min that three of the above processing method sodium bismuthate usage amount, which is all, crystal violet percent of decolourization All reach more than 95%, but single technique（B）With technique（C）The dye solution of mineralising 23% and 22% can only be distinguished.The present invention The method for combined use of proposition but can mineralising 38% dye solution, realize technique（B）With technique（C）Have complementary advantages.
Embodiment 2：
Prepare 100mg/L safranine aqueous solution dye wastewaters（Solution belongs to 6~11 scopes without removal of impurities, pH value It is interior）, measure 200mL dye solutions and load technique（B）In reactor.The reactor can be any simple receptacle, be stirred wherein putting one Son is mixed, the agitating solution in the presence of agitator.Weigh 0.15g sodium bismuthates and bismuth silver oxide is synthesized with 0.05g silver nitrates, and will It is put into reactor starts to react in the presence of stirring.After direct oxidation process carries out 20min, dye solution is substantially de- Color.Waste water after decolouring is centrifuged being fully transferred to technique（C）In reaction vessel.Weigh 0.15g sodium bismuthates（0.75g/L） Above-mentioned solution is put into, after being sufficiently mixed in the presence of stirring, sunshine irradiation makes the further depth degradation of dye solution, the step Rapid reaction carries out 80min.Determine safranine TOC（Total organic carbon）Test result indicates that, amount to reaction time 100min in Safranine TOC declines 42%.
As a comparison, 0.15g sodium bismuthates are weighed and synthesize bismuth silver oxide with 0.6g silver nitrates, and are used it in technique B, Reacted in the case of remaining reaction condition identical, safranine TOC clearances are still 42% after 100min, illustrate excessive nitre Contribution of the sour silver to being combined biodegrading process is little.
Equally as a comparison, 0.15g sodium bismuthates are weighed and synthesize bismuth silver oxide with 0.01g silver nitrates, and use it for work In skill B, reacted in the case of remaining reaction condition identical, safranine TOC clearances are 35% after 100min, are illustrated very few Silver nitrate can influence technique B efficiency, and then combination biodegrading process is had an impact.
Embodiment 3：
Prepare 65mg/L Alizarin Red Aqueous Solution dye wastewaters（Solution belongs in the range of 6~11 without removal of impurities, pH value）. Measure 200mL dye solutions and load technique（B）In reactor, wherein stirrer is put, the agitating solution in the presence of agitator.Press Sodium bismuthate:Silver nitrate is 3.5:1 part by weight synthesis bismuth silver oxide, weigh the bismuth silver oxide input reaction of 0.2g synthesis Start to react in the presence of stirring in device.After direct oxidation process carries out 15min, dye solution decolourizes substantially.After decolouring Waste water be centrifuged being fully transferred to technique（C）In reaction vessel.Weigh 0.3g sodium bismuthates（1.5g/L）Put into above-mentioned molten Liquid, after being sufficiently mixed, sunshine irradiation makes the further depth degradation of dye solution, and the step reaction carries out 70min.To finally going out Water carries out detection discovery, and alizarin red TOC declines 52% in 85min.
As a comparison, weigh the bismuth silver oxide of 0.4g synthesis and use it in technique B, it is identical in remaining reaction condition In the case of react, 85min alizarin red TOC clearances be 53%, illustrate excessive bismuth silver oxide to be combined biodegrading process tribute Offer less.
Equally as a comparison, the bismuth silver oxide for weighing 0.2g synthesis is used in technique B, extended residence time 30min, Reacted in the case of remaining reaction condition identical, the red TOC clearances of 100min hystazarins are 53%, illustrate that long technique B stops The time is stayed to influence combination biodegrading process smaller.
Embodiment 4：
Prepare the reddish black B aqueous solution dye wastewater that 200mL concentration is 100mg/L（Solution belongs to without removal of impurities, pH value In the range of 6~11）Load technique（B）In reactor.The reactor can be any simple receptacle, wherein putting a stirrer, stir Mix agitating solution in the presence of device.Weigh 0.3g sodium bismuthates and 0.1g silver nitrates（Weight is than 3:1）Bismuth silver oxide is synthesized, and will It is put into reactor starts to react in the presence of stirring.After direct oxidation process carries out 15min, dye solution is substantially de- Color.Waste water after decolouring is centrifuged being fully transferred to technique（C）In reaction vessel.Weigh 0.3g sodium bismuthates（1.5g/L）Throw Enter above-mentioned solution, fully reaction 80min, depth degradation is carried out to dye solution under sunshine irradiation.Determine reddish black B solution TOC results find that the TOC for amounting to azure B in reaction time 95min declines 37%.
As a comparison, it is 50cm away from reactor to use 300W xenon lamps as light source, light source in technique C, is capped on reactor 400nm optical filters ensure that exciting light is all visible light wave range in technique C.Reacted in the case of remaining reaction condition identical, Reddish black B TOC clearances are only 31% after 95min.
Above comparative test result shows that sunshine irradiation is higher than the TOC rates of descent of radiation of visible light, illustrates sunshine Spectrum middle ultraviolet band part improves technique C obvious processing effect, and finally lifts dye while reducing and being combined process costs The overall mineralising efficiency of material.
Embodiment 5：
Prepare 40mg/L malachite green aqueous solution dye wastewaters（Solution belongs to 6~11 scopes without removal of impurities, pH value It is interior）.Measure 100mL and load technique（B）In reactor.The reactor can be any simple receptacle, wherein putting stirrer, stir Agitating solution in the presence of device.Weigh 0.25g sodium bismuthates and 0.1g silver nitrates（Weight is than 2.5:1）Bismuth silver oxide is synthesized, and Put into reactor and start to react in the presence of stirring.Waste water after decolouring is centrifuged being fully transferred to technique （C）In reaction vessel, retain technique（B）In remaining solid particle thing.Weigh 0.2g sodium bismuthates（2g/L）After input is decolourized Dye solution, after sunshine irradiates light-catalyzed reaction 45min, malachite green solution is centrifuged, retains remaining bismuthic acid sodium light and urges Agent.TOC testing results show that the TOC for amounting to malachite green dyestuff in reaction time 55min declines 39%.
Utilize technique（B）In remaining bismuth silver oxide and technique（C）In remaining sodium bismuthate photochemical catalyst repeat it is above-mentioned Course of reaction, after continuously repeating 5 times, measure the 6th degraded and terminate rear malachite green dye solution TOC declines 27%, show this hair The method of bright offer has preferable stability, and oxidant therein can be utilized repeatedly with catalyst.
The present invention is not limited to embodiments above.

Claims (3)

  1. A kind of 1. method of inexpensive fast deep degrading organic dye waste water, it is characterised in that carry out as follows：
    (A) grid is cleaned, staticly settled, regulation pH value to 6~11；
    (B) after waste water introduces reaction vessel, sodium bismuthate and the bismuth silver oxide of silver nitrate synthesis is added, is protected in the presence of stirring The homogeneous hybrid reaction of multiphase is held, temperature is maintained at room temperature, and pressure is normal pressure, and the residence time regards dye with the total input amount of bismuth silver oxide Depending on expecting waste strength, waste water centrifuges discharge after decolourizing substantially, into next handling process；
    (C) epimere water outlet introduces another reaction vessel, adds sodium bismuthate and makees catalyst, the stirring reaction under the irradiation of sunshine, The waste water after processing is discharged afterwards；
    Bismuth silver oxide presses sodium bismuthate in above-mentioned steps (B):Silver nitrate is (2.5~3.5):1 weight is than synthesis；
    The input amount of sodium bismuthate is 0.75~2g/L in above-mentioned steps (C).
  2. 2. the method for inexpensive fast deep degrading organic dye waste water according to claim 1, it is characterised in that reaction Recycling step (B) and bismuth silver oxide and bismuthic acid sodium catalyst in (C) afterwards, are continuing with.
  3. 3. the method for inexpensive fast deep degrading organic dye waste water according to claim 1 or 2, it is characterised in that In step (B), by every 200mL waste water, 0.15g sodium bismuthates and 0.05g nitric acid silver reactions 15min are added；In step (C), by every 200mL waste water, react 30min under the sunlight catalytic effect of 0.15g sodium bismuthates.
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CN111547906B (en) * 2020-05-11 2022-06-24 南昌航空大学 Method for deeply degrading organic pollutants in water by fully utilizing bismuth-silver oxide

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101519256A (en) * 2009-04-10 2009-09-02 南京大学 Application of sodium bismuthate in rapidly degrading organic dye waste water and degradation method
CN101759312A (en) * 2009-12-31 2010-06-30 南京大学 Method for degradation of triphenylmethane dye wastewater
CN101560027B (en) * 2009-04-10 2011-07-20 南京大学 Method for rapid degradation of triphenylmethane dye waste water

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101519256A (en) * 2009-04-10 2009-09-02 南京大学 Application of sodium bismuthate in rapidly degrading organic dye waste water and degradation method
CN101560027B (en) * 2009-04-10 2011-07-20 南京大学 Method for rapid degradation of triphenylmethane dye waste water
CN101759312A (en) * 2009-12-31 2010-06-30 南京大学 Method for degradation of triphenylmethane dye wastewater

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