고도산화공정인 오존처리에 의한 난분해성 염료 수용액의 분해특성

황세욱,박종환,이수림,엄주현,류성기,최익원,김성헌,강세원,조주식,서동철 한국환경농학회 2020 한국환경농학회지 Vol.39 No.1

BACKGROUND: Most of the researches on the dye removal using ozonation have been focused on the removal efficiency. However, the research on their removal characteristics and mechanism according to the reaction time has been still insufficient. METHODS AND RESULTS: In this study, the effects of initial pH and dye concentration with reaction time on the degradation characteristics of methyl orange (MO) and methylene blue (MB) by ozonation were evaluated. The degradation efficiency of MB by ozonation increased with increasing pH. On the other hand, the degradation efficiency of MO by ozonation did not show a significant difference with varing pH. The both MO and MB by ozonation were decomposed within 30 min irrespective of the dye con-centration, but the decomposition rates of dyes were faster at lower initial dye concentration. The decomposition efficiency of total organic carbon (TOC) in each dye solution by ozonation was low, which was found to be effective for partial decomposition such as decolorization rather than complete degradation of the dye. CONCLUSION: Overall, ozonation was an effective method for removing nondegradable dyes. However, it is necessary to study the optimization of dye degradation under various environmental conditions for ozonation.

Photocatalytic degradation of dyes using semiconductor photocatalysts to clean industrial water pollution

Asma Rafiq,Muhammad Ikram,S. Ali,Faiza Niaz,Maaz Khan,Qasim Khan,Muhammad Maqbool 한국공업화학회 2021 Journal of Industrial and Engineering Chemistry Vol.97 No.-

Textile industry represents a pollution problem worldwide due to the accidental discharge or dumping ofpolluted wastewater into the waterways, which is having a major influence on the quality of waterresources. Around 17–20% of industrial water pollution arises from textile dyeing and treatmentaccording to the World Bank report. This represents a large environmental challenge for textilemanufacturers. With growing environmental awareness, there is a need for environmentally-friendlytechnology to remove dyes from the industrial and local wastewater. The photo decolorization of dyes isconsidered as a favorable technology for industrial wastewater treatment techniques owing to itsenvironmentally friendly method, low cost, and lack of secondary pollution. The efficiency ofphotocatalysis system depends on the operational parameters that govern the adsorption andphotodegradation of dye molecules. This comprehensive review examines the operational factorsinfluencing the photo decolorization of dye molecules. Our study aims to review and summarize thepreviously published works and R&D progress in thefield of photocatalysis of various water pollutantssuch as the toxic organic compounds (cationic and anionic dyes) using various semiconductornanoparticles under visible, solar and UV irradiation. This paper examines the effects of operatingparameters on the photocatalytic degradation of textile dyes using various photocatalysts. Ourfindingsshowed that various parameters, like initial pH of the solution to be degraded, photocatalystconcentration, reaction temperature, dye concentration and dopants content exert their individualinfluence on the photocatalytic degradation of any dye. By investigating previous research to elucidatethe most significant active species for optimal photo decolorization reactions, this review providesguidelines that can be applied to the development of effective photodegradation systems. The results ofour study will help determine the most effective and economical options for removal of dyes in industrialwastewater.

염색공단폐수의 색도처리를 위한 염료분해 균주의 분리와 특성

김정태 ( Jung Tae Kim ),박근태 ( Guen Tae Park ),이건 ( Geon Lee ),강경환 ( Kyeong Hwan Kang ),김중균 ( Joong Kyun Kim ),이상준 ( Sang Joon Lee ) 한국환경과학회 2014 한국환경과학회지 Vol.23 No.1

To treat chromaticity contained in effluents of dyeing wastewater efficiently, potent dye-degrading microorganisms were isolated from influent water, aeration- tank sludge, recycle water and settling-tank sludge located in leather and dyeing treatment plant. Six potent strains were finally isolated and identified as Comamonas testosteroni, Methylobacteriaceae bacterium, Stenotrophomonas sp., Kluyveromyces fragilis, Ascomycetes sp. and Basidiomycetes sp. When Basidiomycetes sp. was inoculated into ME medium containing basal mixed-dyes, 93% of color was removed after 8 days incubation. In the same experiment, the 1:1 mixed culture of Basidiomycetes sp. and photosynthetic bacterium exhibited 88% of color removal; however, it showed better color removal for single-color dyes. The aeration-tank and settling-tank samples revealed higher color removal (95-96%) for black dyes. The settling-tank sample also revealed higher color removal on basal mixed-dyes, which resulted in 90% color removal after 6-h incubation. From the above results, it is expected to achieve a higher color removal using the mixed microorganisms that were isolated from aeration-tank and settling-tank samples.

미생물을 이용한 염료의 생분해에 관한 연구 : 반응성염료 분해균에 관한 연구 Studies on the Reactive Dye-Degrading Microorganisms

정영건,지원대,정민선,백형진 효성여자대학교 부설 한국환경위생연구소 1994 환경위생연구 Vol.4 No.1

대구시의 염색폐수처리장 폐수 및 처리장 주변의 토양과 물에서 반응성 염료인 Cibacron Brilliant Red 3B-A(CBR), Reactive Orange 16(RO), Reactive Black 5(RB)에 탈색능을 보이는 12종의 균을 분리하고 이들 균 중에서 본 실험에 사용한 CBR, RO, RB5 염료 모두에 약 90% 이상의 높은 탈색율을 나타낸 CBR2균을 선별하였다. 선별된 CBR2균의 특성 및 염료분해특성을 조사하였다. CBR2균은 그람 음성, 무아포, 간균으로 운동성이 있으며, 염농도 5%, 온도 50℃에서도 생육이 가능하였다. CBR2균의 생육 및 염료의 탈색에 미치는 pH의 영향을 조사한 결과, pH 5.0에서 9.0까지 고른 균 성장과 탈색율을 나타내었으며 특히 pH 7.0에서 최고의 균 성장 및 염료 탈색율을 나타내었다. 온도별 균의 생육 및 염료의 탈색율을 조사한 결과 30℃에서 가장 높은 균 성장 및 탈색율을 나타내었다. 산소량에 따른 균의 생육 및 염료의 탈색율을 조사한 결과, 산소량이 많을수록 균의 생육이 좋았으며, 염료의 탈색율에 있어서도 CBR 염료의 경우는 산소량에 비례해서 탈색율이 좋았으나, RO와 RB5 염료의 경우는 산소량이 가장 많은 2ml양의 배양에서 보다 상대적으로 산소량이 적은 4ml양의 배양에서 가장 높은 탈색율을 보였다. Twelve strains, which were exhibited abilities of decolorizationto the reactive dyes, Cibacron Brilliant Red 3B-A(CBR) , Reactive Orange 16(RO) and Reactive Black 5(RB5) , were isolated from the samples of waste waterof the dye textile factories and the samples of soil and water around them. Amongthem one stain, CBR2 was selected because of the higest decolorization rateto the reactive dyes, CBR, RO and RB5 with more than 90% of decolorizationrate. The characteristics of reactive dye-degrading microorganism CBR2 andits decolorization abilities to reactive dyes were investigated. This CBR2 wasGram negative and non-spore forming rod. This organism has motility and ispossible to grow even in 5% of sodium chloride solution and at such temperatueof 50℃ In the pH 5.0 to 9.0, growth rate of the isolate and decolorizationrate to reactive dyes by CBR2 were exhibited almost similar rates. However,among those pH of media the most growth and decolorization rates were appearedat pH 7.0. On the temperature effects to growth rates of CBR2 and decolorizationrate by this organism, the most growth and decolorization rates were at tempera-ture of 30℃. More oxygen volumes in test tubes enhanced generally the growthrate of this organism. However, the decolorization rate of CBR dye by CBR2was higher according to oxygen volume increased in the media but the decoloriza-tion rates of RO and RB5 dyes in 2m1 volume of culture media were rather decrea-sed than that of 4ml volume of culture media where oxygen volume is lowerthan that of 2ml volum of culture media.

Electrochemical degradation of scarlet red dye from aqueous environment by titanium-based dimensionally stable anodes with SS electrodes

Gomathi, E.,Balraj, B.,Kumaraguru, K. The Korean Society for Applied Biological Chemistr 2018 Applied Biological Chemistry (Appl Biol Chem) Vol.61 No.3

Textile effluents are toxic and carcinogenic materials that exist in the aquatic environment. In this study, the degradation efficiency of commercially available scarlet red dye investigated on TSA-SS Electro Fenton process (EFP) was reported. It is of great interest in the field of environmental engineering to remove dyes from aquatic environment. The influence of operating parameters such as pH (2-9), current density ($0.1-0.5mA/cm^2$), concentration of dye (0.1-0.5 g/L), $H_2O_2$ (0.1-0.5 g/L) concentration and $Fe^{2+}$ concentration (0.01-0.03 g/L) were analyzed by batch system. The optimum degradation conditions were determined as pH-3, current density-$0.4mA/cm^2$, concentration of dye-0.4 g/L, $H_2O_2$ concentration-0.5 g/L and $Fe^{2+}$ concentration-0.025 g/L. These results indicated that the degradation efficiency of scarlet red dye by EFP depends on solution pH and Fenton reagent concentration and a low pH value was favorable for the dye degradation. It has been demonstrated that more than 94% dye removal was obtained at 50 min. Electro Fenton process was also investigated by cyclic voltammetry technologies.

Electrochemical degradation of scarlet red dye from aqueous environment by titanium-based dimensionally stable anodes with SS electrodes

E. Gomathi,B. Balraj,K. Kumaraguru 한국응용생명화학회 2018 Applied Biological Chemistry (Appl Biol Chem) Vol.61 No.3

Textile effluents are toxic and carcinogenic materials that exist in the aquatic environment. In this study, the degradation efficiency of commercially available scarlet red dye investigated on TSA-SS Electro Fenton process (EFP) was reported. It is of great interest in the field of environmental engineering to remove dyes from aquatic environment. The influence of operating parameters such as pH (2–9), current density (0.1–0.5 mA/cm2), concentration of dye (0.1–0.5 g/L), H2O2 (0.1–0.5 g/L) concentration and Fe2? concentration (0.01–0.03 g/L) were analyzed by batch system. The optimum degradation conditions were determined as pH—3, current density— 0.4 mA/cm2, concentration of dye—0.4 g/L, H2O2 concentration— 0.5 g/L and Fe2? concentration—0.025 g/L. These results indicated that the degradation efficiency of scarlet red dye by EFP depends on solution pH and Fenton reagent concentration and a low pH value was favorable for the dye degradation. It has been demonstrated that more than 94% dye removal was obtained at 50 min. Electro Fenton process was also investigated by cyclic voltammetry technologies.

큰느타리(Pleurotus eryngii)의 방향족 합성염료 분해 특성

임경환,이태수,백승아 한국버섯학회 2022 한국버섯학회지 Vol.20 No.2

Pleurotus eryngii, a white rot fungus, produces two extracellular lignin-degrading enzymes, laccase and manganese peroxidase (MnP). Owing to these enzymes, P. eryngii efficiently degrades synthetic chemicals such as azo, phthalocyanine, and triphenyl methane dyes. In this study, we investigated the degradation processes of four aromatic dyes, congo red (CR), methylene blue (MB), crystal violet (CV), and malachite green (MG), by P. eryngii under solid and liquid culture conditions. CR and MG were the most quickly degraded under solid and liquid culture conditions, respectively. However, compared to CR, CV, and MG, MB was not degraded well under both culture conditions. The activities of ligninolytic enzymes (laccase and MnP) were also investigated. Laccase was identified to be the major enzyme for dye degradation. A positive relationship between decolorization and enzyme activity was observed for CR, MB, and CV degradation. In contrast, decolorization of MG ensued after high enzyme activity. These results indicate that the degradation process differs between MG and the other aromatic dyes. Therefore, P. eryngii could be a potential tool for the bioremediation of synthetic aromatic dye effluent.

Graphene, charcoal, ZnO, and ZnS/BiOX (X=Cl, Br, and I) hybrid microspheres for photocatalytic simulated real mixed dye treatments

Yoon, Hee Jung,Choi, Young In,Jang, Eue-Soon,Sohn, Youngku Elsevier 2015 Journal of industrial and engineering chemistry Vol.32 No.-

<P><B>Abstract</B></P> <P>Graphene, charcoal, ZnO, and ZnS/BiOX (X=Cl, Br, and I) hybrid microspheres were synthesized for use in the photocatalytic treatment of a mixed dye of MO (methyl orange), RhB (rhodamine B), and MB (methylene blue) solution. The dye degradation rate was generally observed in the order of RhB<MB<MO. The order became MB<RhB<MO for ZnO/BiOI and ZnS/BiOI. The catalysts hybridized with BiOI generally showed superior adsorption capacity to those of the materials hybridized with BiOCl or BiOBr. The 10 mol% ZnO/BiOI and ZnS/BiOI showed selectivity for MB adsorption in the mixed dye.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Graphene/BiOX, charcoal/BiOX, ZnO/BiOX, and ZnS/BiOX hybrid microspheres were synthesized by a solvothermal method. </LI> <LI> Physicochemical properties of the hybrid materials were fully examined. </LI> <LI> Adsorption and photocatalytic dye degradation were fully tested for mixed dye (MO+RhB+MB) under visible light. </LI> <LI> Adsorption and photocatalytic properties in a complicated dye system were discussed. </LI> </UL> </P>

Surface treated and metal oxide loaded rutile TiO₂ nanorod photocatalyst for synergistic degradation of Orange (II) dye pollutant under solar light

( Love Kumar Dhandole ),( Mahadik Mahadeo Abasaheb ),김수경,조민,류정호,장점석 한국공업화학회 2016 한국공업화학회 연구논문 초록집 Vol.2016 No.1

Transition metal oxides loaded acid treated TiO₂ nanorods (NRs) were successfully prepared by chemical treatment and wet impregnation methods. The catalysts were characterized by XRD, TEM, XPS, FT-IR and UV-DRS. The photocatalytic activities of as-prepared, acid treated, metal oxide loaded and metal oxide loaded acid treated NRs were compared and dye degradation efficiency were determined from kinetics of the degradation of Orange (II) dye. Cobalt oxide 1w% loaded on 1.0 M acid treated TiO₂ NRs exhibited the higher photocatalytic Orange (II) degradation efficiency 98.57% (within 120 min) than as-prepared and metal oxide loaded samples. The synergistic effect of cobalt oxide on acid treated TiO₂ NRs over dye degradation is considered as fine dispersion of metal oxides on the OH rich surface of TiO₂. The mechanism of enhanced photocatalytic activity and photoelectrochemical analysis of photocatalyst also studied. ^**This work was supported by the BK21 plus program.

Agar based bimetallic nanoparticles as high-performance renewable adsorbent for removal and degradation of cationic organic dyes

Santanu Patra,Ekta Roy,Rashmi Madhuri,Prashant K. Sharma 한국공업화학회 2016 Journal of Industrial and Engineering Chemistry Vol.33 No.-

Removal of toxic organic compounds from the industrial wastewater is currently one of the mostimportant subjects in water pollution control. A highly efficient, effective and rapid polysaccharide(agar)-based adsorbent was synthesized by modifying monometallic/bimetallic nanoparticles (Fe, Cu,Pd, Fe/Cu and Fe/Pd) to remove cationic dyes (methylene blue, MB and rhodamine B, RhB). The effects ofdifferent parameters like initial contact time, solution pH value, temperature and amount of adsorbenton the adsorption capacity as well as dye removal capacity of the adsorbent were investigated. Themaximum adsorption capacities of the agar@Fe/Pd nanoparticles based adsorbent for both MB and RhBwere found 875.0 mg g 1 and 780.0 mg g 1, respectively. On the optimized parameter, the adsorbentshows a very high efficiency and rapid removal property for both the dyes. The adsorption follows theFreundlich isotherm model for the equilibrium process. The kinetic studies revealed that the adsorptionof both the dyes followed the pseudo-first order kinetic model. Additionally, two different models, i.e. intraparticle diffusion and elovich model were also studied for adsorption of both the dyes. Similarly, therate of degradation of MB and RhB on agar@Fe/Pd nanoparticles was also studied and their rate constantswere found as 3.16 10 2 s 1 and 4.82 10 2 s 1, respectively. Furthermore, the regenerationexperiments showed that the adsorbent could be reused for at least 20 cycles with very efficient dyeremoval capacity (90%) even in complex systems containing mixture of dyes, salt, and surfactant. Thus,the agar-based adsorbent has the potential in the fast and effective adsorption, removal and degradationof toxic dyes from industrial textile wastewater.