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Degradation of rhodamine b by MnFe-LDH/PMS/O_(3) three-phase catalytic system: performance, mechanism and ecotoxicity studies

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Frontiers of Environmental Science & Engineering 2024年第1期18卷 111-127页

作者： Ying Han Ying Yang Weibao Liu Yilong Hou Ce Wang Jiangwei Shang Xiuwen Cheng Key Laboratory of Pollutant Chemistry and Environmental Treatment College of Chemistry and Environmental ScienceYili Normal UniversityYining 835000China Key Laboratory for Environmental Pollution Prediction and Control of Gansu Province College of Earth and Environmental SciencesLanzhou UniversityLanzhou 730000China

This study developed a novel MnFe-LDH/PMS/O3 three-phase catalytic system to degrade the organic dye Rhb, which was used to address the drawbacks of persulfate oxidation and ozonation techniques. The structure, ionic and elemental composition, specific surface area, and magnetic properties of the LDHs were investigated using a variety of physicochemical characterization tools. The results showed that MnFe-LDH had a large specific surface area, a rich crystalline phase composition, and a functional group structure. The Rhb degradation rate of MnFe-LDH/PMS/O3 was 0.34 min−1, which was much higher than that of other comparative systems. Rhb could be completely degraded in 10 min after optimization and had a significant effect on TOC removal. The system was found to be effective over a wide pH range. Common anions were largely unaffected and humic acid acted as an inhibitor. At the same time, the system had generally effective degradation performance for different dyes. Combined with quenching experiments and EPR, it was found that SO4•−, •OH, O_(2)•−, and 1O_(2) all participated in the reaction, and •OH contributed more. The degradation pathway of Rhb was derived by LC-MS, and the T.E.S.T. evaluation found that the toxicity of the intermediate product was significantly reduced. Finally, the stability and availability of LDHs were verified using cycling experiments and metal ion leaching. This work provides a theoretical basis and data support for the synergistic catalysis of PMS/O3 and the deep treatment of dye wastewater.

关键词： rhodamine b Layered double hydroxides Peroxymonosulfate Ozonation

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Advancements in adsorption and photodegradation technologies for rhodamine b dye wastewater treatment: fundamentals, applications, and future directions

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Green Chemical Engineering 2024年第4期5卷 440-460页

作者： Peter Olusakin Oladoye Mohammed Kadhom Idrees Khan Kosar Hikmat Hama Aziz Yakubu Adekunle Alli Department of Chemistry and biochemistry Florida International University Analytical/Environmental Chemistry Unit Department of Pure and Applied ChemistryLadoke Akintola University of Technology Department of Environmental Science College of Energy and Environmental ScienceAlkarkh University of Science School of Chemistry and Chemical Engineering Northwestern Polytechnical University Department of Chemistry College of ScienceUniversity of Sulaimani Department of Medical Laboratory of Science College of Health SciencesUniversity of Human Development CNRS LCC (Laboratoire de Chimie de Coordination)UPR8241Université de Toulouse

Organic dye pollutants present in wastewater pose a significant global challenge. Among pollutants, the synthetic dye rhodamine b(Rb) stands out due to its non-biodegradable nature and associated neurotoxic, carcinogenic,and respiratory irritant properties. Extensive research has been conducted on the efficacy of adsorption and photodegradation techniques for the removal of Rb from wastewater. While adsorption and advanced oxidation processes(AOPs) have gained considerable attention for their effectiveness in recent years, the underlying behaviors and mechanisms of these technologies remain incompletely understood. Therefore, a comprehensive of recent research progress in this domain is imperative to clarify the basics and present the up-to-date *** review provides an in-depth exploration of the fundamentals, advancements, and future trajectories of Rb wastewater treatment technologies, mainly encompassing adsorption and photodegradation. This work starts with a general introduction of outlining the sources, toxicity, and diverse applicable removal strategies. Subsequently, it thoroughly examines crucial techniques within non-photochemical, photochemical, and adsorption technologies, such as UV light assisted AOP, catalyst assisted AOP, ozonation, Fenton system, electrochemical AOP, and adsorption technology. The primary objective is to furnish a broad overview of these techniques,elucidating their effectiveness, limitations, and applicability. Following this, the review encapsulates state-of-theart computational simulations pertaining to Rb adsorption and interactions with clays and other ***, it delves into column adsorption of Rb dye, and elucidates various influencing factors, including bed height, feed concentration, pollutant(Rb) feeding or flow rate, and column regeneration. This panoramic review aims to provide valuable insights into suitable techniques, research gaps, and the applicability of nonphotochemical, photochemical, and

关键词： rhodamine b Wastewater treatment Photodegradation Column adsorption Dye removal Advanced oxidation processes

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Mg(NO_(3))_(2)·6H_(2O)-Assisted insitu-Fabrication of Tea Residual biochar for Ultra-Fast and High Adsorption of rhodamine b

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Wuhan University Journal of Natural Sciences 2024年第2期29卷 165-176页

作者： HU Dandan XUE Yangfan LIU bo WU Yongjuan LI Zichen School of Chemistry&Chemical Engineering Shaanxi Xueqian Normal UniversityXi'an 710100ShaanxiChina Safe College Xi􀆳an University of Science and TechnologyXi'an 710054ShaanxiChina

In this work,porous biochar(MN-TRb_(750))was fabricated via direct pyrolysis of tea residue(TR)and Mg(NO_(3))_(2)·6H_(2)O(MN).The as-synthesized MN-TRb_(750) reached a specific surface area of 839.54 m^(2)·g^(-1)and an average pore size of 3.75 nm with multi-level pore *** decreased TR's carbonization temperature and promoted the aromatics extent,pore structure for the frizzly flake-like *** b(Rhb)was chosen as the adsorbate to explore the removal performance of organic dyes in this *** results indicated that the maximum adsorption capacity of Rhb on MN-TRb_(750) at 20℃ is up to 809.0 mg·g^(-1)with isotherms fitted well to Freundlich and Dubinin-Radushkevic *** adsorption kinetics followed pseudo-second-order and Elovich models with an equilibrium adsorption capacity of 757.6 mg·g^(-1)as the initial concentration of Rhb is 260 mg·L^(-1).High pore filling,hydrogen bond,π-πinteraction determined the adsorption of Rhb onto MN-TRb850 through a multi-active center and exothermic chemical sorption process.

关键词： Mg(NO_(3))_(2)·6H_(2)O porous biochar mechanism rhodamine b adsorption

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Photocatalytic Degradation of rhodamine b by Recyclable Ag br/Polypyrrole(PPy)Nano-Catalysts

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Journal of Wuhan University of Technology(Materials Science) 2023年第5期38卷 1198-1204页

作者： YIN Xiaogang LIU Xinyun LI Hang WU Huimin FU Hai GONG Wei Key Laboratory of Functional Materials Chemistry of Gui Zhou Province School of Chemistry and Materials ScienceGui Zhou Normal UniversityGuiyang 550001China School of Pharmaceutical Sciences Guizhou Medical UniversityGuiyang 550025China

We investigated the removal of the organic dye rhodamine b in wastewater with recyclable Agbr/polypyrrole(PPy)*** PPy as an active base for electron transfer,and hexadecyltrimethylammonium bromide(CTAb)as both the soft-templating agent and the bromine source,a series of Agbr/PPy nano-photocatalysts containing various proportions of silver were prepared in a convenient one-step synthesis *** synthesized catalysts were characterized by TG analysis to reveal that,in comparison with pure PPy,the interaction between PPy and Agbr led to increased thermal *** combination of PPy and Agbr was observed through XRD and XPS *** the morphology study,the Agbr particles were found to be well dispersed in the PPy nanowire network from SEM *** the photodegradation experiments,up to 92%rhodamine b was degraded by the Agbr/PPy catalysts in the period of 1 hour under 254 nm UV *** catalysts could maintain 60%catalytic efficiency after 3 cycles in the recyclability test.

关键词： polypyrrole Agbr photocatalysts rhodamine b

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Application of activated carbon derived from scrap tires for adsorption of rhodamine b

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Journal of Environmental Sciences 2010年第8期22卷 1273-1280页

作者： Li Li Shuangxi Liu Tan Zhu Institute of New Catalytic Materials Science College of Chemistry Nankai University Tianjin 300071 China College of Environmental Science and Engineering Nankai University Tianjin 300071 China

Activated carbon derived from solid hazardous waste scrap tires was evaluated as a potential adsorbent for cationic dye removal. The adsorption process with respect to operating parameters was investigated to evaluate the adsorption characteristics of the activated pyrolytic tire char （APTC） for rhodamine b （Rhb）. Systematic research including equilibrium, kinetics and thermodynamic studies was performed. The results showed that APTC was a potential adsorbent for Rhb with a higher adsorption capacity than most adsorbents. Solution pH and temperature exert significant influence while ionic strength showed little effect on the adsorption process. The adsorption equilibrium data obey Langmuir isotherm and the kinetic data were well described by the pseudo second-order kinetic model. The adsorption process followed intra-particle diffusion model with more than one process affecting the adsorption process. Thermodynamic study confirmed that the adsorption was a physisorption process with spontaneous, endothermic and random characteristics.

关键词： activated pyrolytic tire char rhodamine b adsorption isotherm thermodynamics

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Effect of doped strontium on catalytic properties of La_(1-x)SrxMnO_(3) for rhodamine b degradation

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Journal of Rare Earths 2021年第11期39卷 1362-1369,I0002页

作者： Jiaxiu Guo YueJing Ting Shen Hongdi Luo Juan Liang Shandong Yuan College of Architecture and Environment Sichuan UniversityChengdu 610065China National Engineering Technology Research Center for Flue Gas Desulfurization Chengdu 610065China Institute of New Energy and Low Carbon Technology Sichuan UniversityChengdu 610065China

A series of La_(1-x)Sr_(x)MnO_(3) samples were prepared by sol-gel method and used to degrade rhodamine b(Rhb) in *** samples were characterized by X-ray diffraction(XRD),X-ray photoelectron spectroscopy(XPS),N_(2) adsorption-desorption,temperature-programmed reduction of H_(2)(H_(2)-TPR) and temperature-programmed desorption of O_(2)(O_(2)-TPD).The results show that the degradation of Rhb is highly dependent on the initial pH value of *** doping enhances the degradation ability of LaMnO_(3) for Rhb in the time range of 0-40 min under a strong acidic environment,but all samples exhibit similar degradation rate from 40 to 60 *** La_(0.7)Sr_(0.3)MnO_(3)-Rhb reaction system,there are two different degradation pathways,including N-de-ethylation,chromophore cleavage,ring-opening and ***_(1-x)Sr_(x)MnO_(3)(x ≤0.3) has the perovskite structure of La-Mn oxides,while La_(0.6)Sr_(0.4)MnO_(3) exhibits a Sr_(0.4)MnLa_(0.6)O_(2).98 perovskite *** doping leads to distortion of rhombohedral crystal structure and increases the relative content of Mn^(4+).The perovskite structure is stable in strong acidic environment during Rhb degradation,but the relative content of Mn^(4+)and Mn^(3+) on the material surface *** doped LaMnO_(3) achieves specific surface area of 58.8 m^(2)/g and total pore volume of 0.152 cm^(3)/***,Sr^(2+)doping improves redox properties of La-Mn oxides,and the presence of defects makes oxygen diffusion easier compared with the undoped samples.

关键词： Organic pollutant Degradation rhodamine b LaMnO_(3) Sr Perovskite

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Ag-Co3O4：Synthesis,characterization and evaluation of its photo-catalytic activity towards degradation of rhodamine b dye in aqueous medium

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Chinese Journal of Chemical Engineering 2018年第6期26卷 1264-1269页

作者： Muhammad Saeed Majid Muneer Nida Mumtaz Mohsin Siddique Nadia Akram Muhammad Hamayun Department of Chemisny Government College University Faisalabad Pakistan Department of Chemistry Bacha Khan University Charsadda Pakistan Department of Chemistry University of Gujrat Hafiz Hayat Campus Gujrat Pakistan

Synthesis,characterization of Co_3O_4 and Ag-Co_3O_4 composites and evaluation of their photo-catalytic activities towards photo-degradation of aqueous solution of rhodamine b dye under irradiation of visible light have been described in this ***_3O_4 was prepared by solid phase mechano chemical process using Co(NO_3)_2·6H_2O and NH_4 HCO_3 as precursor *** was deposited on Co_3O_4 from AgNO_3 using Calotropis gigantea extract as reducing ***,SEM and FTIR were used for characterization of prepared ***-catalytic efficiencies of as-prepared Co_3O_4 and Ag-Co_3O_4 were evaluated for aqueous phase photo-degradation of rhodamine *** was found that deposition of Ag on Co_3O_4 highly enhanced the photo-catalytic activity of Co_3O_***-catalytic degradation followed the Eley–Rideal *** 100% and 91% photo-degradation of 40 ml dye solution achieved at 313 K in 90 and 120 min over 0.05 g of Ag-Co_3O_4 as photo-catalyst using 100 and 200 mg·L^(-1) as initial concentration of dye respectively.

关键词： Co3O4 Ag-Co3O4 Photo-catalysis Photo-degradation Calotropis gigantea rhodamine b Elay–Rideal mechanism

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Surface-enhanced Raman Scattering Effect of Ordered Gold Nanoparticle Array for rhodamine b with Different Morphologies

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Chinese Journal of Polymer Science 2015年第10期33卷 1470-1476页

作者： Xi-hong Zu Zhi-hui Jian 易国斌 Hai-liang Huang ben-bin Zhong Hong-sheng Luo Jia-rong Huang Cui Wang School of Chemical Engineering and Light Industry Guangdong University of Technology

In this study, well-ordered gold nanoparticle array on silicon substrate was adopted as an active surface-enhanced Raman scattering substrate for detecting rhodamine b （Rb）, and the influence of Rb morphologies on surface-enhanced Raman scattering （SERS） properties was discussed. The Au nanoparticle array was prepared by using patterned P4VP nanodomains of poly（styrene-b-4-vinylpyridine）（PS-b-P4VP） diblock copolymer thin films as nanoreactors which is a simple and economical approach. The results show that Raman spectra of Rb on the Au nanopaticle array have much stronger intensity than those on the bare silicon substrate by detecting same Rb solution. It indicates that the prepared Au nanoparticle array on silicon substrate has a significant Raman enhancement for Rb. Interestingly, the Raman intensity of Rb from its ethanol solution is much stronger than that from its aqueous solution due to the special morphologies of Rb formed in their ethanol solutions. This work provides an effective approach to prepare highly sensitive and stable surface-enhanced Raman scattering substrate.

关键词： Nanoparticle array rhodamine b Raman spectroscopy Nanowire Nanograss

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Studies on the Recognition Interaction of rhodamine b and DNA by Voltammetry

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Chemical Research in Chinese Universities 2005年第2期21卷 145-148页

作者： JIAOKui LIQing-jun SUNWei WANGZhen-yong CollegeofChemistryandMolecularEngineering QingdaoUniversityofScienceandTechnologyQingdao266042P.R.China

The recognition interaction of rhodamine b(Rb) with DNA was studied in a britton-Robinson (b-R) buffer solution with pH=7.5 at a glassy carbon electrode by electrochemical techniques. Rb shows an irreversible oxidation peak at +0.92 V(vs. SCE). After the addition of DNA in the Rb solution, the peak current of Rb decreased apparently without the shift of the peak potential. The electrochemical parameters such as the charge transfer coefficient α and the electrode reaction rate constant k s of the interaction system were carefully studied. The parameters did not change before and after the addition of DNA, which indicated that an electrochemical non-active complex had been formed, so the concentration of Rb in the solution decreased and the peak current decreased correspondingly. The binding ratio of Rb to DNA was 2∶1 with a binding constant of 2.66×10 9.

关键词： rhodamine b DNA Recognition interaction Electrochemical behavior

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Functionalized nanographene oxide/PEG/rhodamine b/gold nanocomposite for electrochemical determination of glucose

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Journal of Materials Science & Technology 2022年第27期122卷 141-147页

作者： Wenhao Qian Tao Song Mao Ye Xiaoyu Huang Yongjun Li bingjie Hao Department of Stomatology Shanghai Xuhui District Dental Center 500 Fenglin RoadShanghai 200032China Key Laboratory of Synthetic and Self-Assembly Chemistry for Organic Functional Molecules Center for Excellence in Molecular SynthesisChinese Academy of SciencesShanghai Institute of Organic ChemistryUniversity of Chinese Academy of SciencesShanghai 200032China

Diabetes,one of the most serious metabolism diseases,has continually plagued human beings so that timely monitored blood glucose level is very *** nanoparticles(Au NPs)have been considered as potential substitutes for non-enzymatic sensors,due to their unusual physicochemical property and efficient catalytic ***,we prepared a facial platform for Au NPs to maintain good dispersity and inherent physicochemical *** this special platform(SH-n GO-PEG-Rh b),nanographene oxide(n GO)was employed as an ideal base,which provided adequate carboxyls for conjugating with poly(ethylene glycol)(PEG),and enough epoxy groups for thiol active site.A functional dye(rhodamine b)with preferable fluorescence properties was also introduced into this *** NPs were then aptly in situ grown on the platform via reduction of HAuCl_(4) under mild conditions,providing Au NPs@SHn GO-PEG-Rh *** nanocomposite was cast on a glassy carbon electrode(GCE)conveniently,yielding GCE/Au NPs@SH-n GO-PEG-Rh ***,as shown by cyclic voltammetry(CV)and ready-state amperometry,GCE/Au NPs@SH-n GO-PEG-Rh b was capable of electrochemical determination of glucose so as to provide an efficient sensor for glucose determination with dye tracer.

关键词： Nano-graphene oxide Gold nanoparticles Glucose biosensor rhodamine b

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