IDEAS home Printed from https://ideas.repec.org/a/gam/jijerp/v16y2019i2p198-d197026.html
   My bibliography  Save this article

Photocatalytic Mechanisms for Peroxymonosulfate Activation through the Removal of Methylene Blue: A Case Study

Author

Listed:
  • Jorge Rodríguez-Chueca

    (Department of Industrial Chemical & Environmental Engineering, Escuela Técnica Superior de Ingenieros Industriales, Universidad Politécnica de Madrid, Calle José Gutiérrez Abascal 2, 28006 Madrid, Spain)

  • Esther Alonso

    (Department of Industrial Chemical & Environmental Engineering, Escuela Técnica Superior de Ingenieros Industriales, Universidad Politécnica de Madrid, Calle José Gutiérrez Abascal 2, 28006 Madrid, Spain)

  • Devendra Narain Singh

    (Department of Civil Engineering, Indian Institute of Technology Bombay, Powai, Mumbai-400076, India)

Abstract

Industrial activity is one of the most important sources of water pollution. Yearly, tons of non-biodegradable organic pollutants are discharged, at the least, to wastewater treatment plants. However, biological conventional treatments are unable to degrade them. This research assesses the efficiency of photocatalytic activation of peroxymonosulfate (PMS) by two different iron species (FeSO 4 and Fe 3+ -citrate) and TiO 2 . These substances accelerate methylene blue removal by the generation of hydroxyl and sulfate radicals. The required pH and molar ratios PMS:Fe are crucial variables in treatment optimization. The kinetic removal is reduced by the appearance of scavenger reactions in acidic and basic conditions, as well as by the excess of PMS or iron. The best performance is achieved using an Fe 3+ -citrate as an iron catalyst, reaching the total removal of methylene blue after 15 min of reaction, with a molar ratio of 3.25:1 (1.62 mM of PMS and 0.5 mM Fe 3+ -citrate). Fe 3+ -citrate reached higher methylene blue removal than Fe 2+ as a consequence of the photolysis of Fe 3+ -citrate. This photolysis generates H 2 O 2 and a superoxide radical, which together with hydroxyl and sulfate radicals from PMS activation attack methylene blue, degrading it twice as fast as Fe 2+ (0.092 min −1 with Fe 2+ and 0.188 min −1 with Fe 3+ -citrate). On the other hand, a synergistic effect between PMS and titanium dioxide (TiO 2 ) was observed ( S PMS/TiO2/UV-A = 1.79). This synergistic effect is a consequence of PMS activation by reaction with the free electron on the surface of TiO 2 . No differences were observed by changing the molar ratio (1.04:1; 0.26:1 and 0.064:1 PMS:TiO 2 ), reaching total removal of methylene blue after 80 min of reaction.

Suggested Citation

  • Jorge Rodríguez-Chueca & Esther Alonso & Devendra Narain Singh, 2019. "Photocatalytic Mechanisms for Peroxymonosulfate Activation through the Removal of Methylene Blue: A Case Study," IJERPH, MDPI, vol. 16(2), pages 1-13, January.
    • Handle: RePEc:gam:jijerp:v:16:y:2019:i:2:p:198-:d:197026
    as

    Download full text from publisher

    File URL: https://www.mdpi.com/1660-4601/16/2/198/pdf
    Download Restriction: no
    File URL: https://www.mdpi.com/1660-4601/16/2/198/
    Download Restriction: no
    ---><---

    References listed on IDEAS

    as
    1. Alexis Nzila & Shaikh Abdur Razzak & Jesse Zhu, 2016. "Bioaugmentation: An Emerging Strategy of Industrial Wastewater Treatment for Reuse and Discharge," IJERPH, MDPI, vol. 13(9), pages 1-20, August.
    2. Lin Ma & Chunhai Jiang & Zhenyu Lin & Zhimin Zou, 2018. "Microwave-Hydrothermal Treated Grape Peel as an Efficient Biosorbent for Methylene Blue Removal," IJERPH, MDPI, vol. 15(2), pages 1-10, January.
    Full references (including those not matched with items on IDEAS)

    Citations

    Citations are extracted by the CitEc Project, subscribe to its RSS feed for this item.
    as


    Cited by:

    1. Joana M.C. Fernandes & Irene Fraga & Rose M.O.F. Sousa & Miguel A.M. Rodrigues & Ana Sampaio & Rui M.F. Bezerra & Albino A. Dias, 2020. "Pretreatment of Grape Stalks by Fungi: Effect on Bioactive Compounds, Fiber Composition, Saccharification Kinetics and Monosaccharides Ratio," IJERPH, MDPI, vol. 17(16), pages 1-13, August.

    Most related items

    These are the items that most often cite the same works as this one and are cited by the same works as this one.
    1. Alexis Nzila, 2018. "Current Status of the Degradation of Aliphatic and Aromatic Petroleum Hydrocarbons by Thermophilic Microbes and Future Perspectives," IJERPH, MDPI, vol. 15(12), pages 1-23, December.
    2. Alexis Nzila & Musa M. Musa, 2020. "Current Status of and Future Perspectives in Bacterial Degradation of Benzo[a]pyrene," IJERPH, MDPI, vol. 18(1), pages 1-24, December.
    3. Marzena Smol, 2023. "Circular Economy in Wastewater Treatment Plant—Water, Energy and Raw Materials Recovery," Energies, MDPI, vol. 16(9), pages 1-18, May.
    4. Xian Liu, 2022. "Analysis of Crop Sustainability Production Potential in Northwest China: Water Resources Perspective," Agriculture, MDPI, vol. 12(10), pages 1-17, October.
    5. Li Liu & Shisuo Fan & Yang Li, 2018. "Removal Behavior of Methylene Blue from Aqueous Solution by Tea Waste: Kinetics, Isotherms and Mechanism," IJERPH, MDPI, vol. 15(7), pages 1-16, June.

    Corrections

    All material on this site has been provided by the respective publishers and authors. You can help correct errors and omissions. When requesting a correction, please mention this item's handle: RePEc:gam:jijerp:v:16:y:2019:i:2:p:198-:d:197026. See general information about how to correct material in RePEc.

    If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.

    If CitEc recognized a bibliographic reference but did not link an item in RePEc to it, you can help with this form .

    If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your RePEc Author Service profile, as there may be some citations waiting for confirmation.

    For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: MDPI Indexing Manager (email available below). General contact details of provider: https://www.mdpi.com .

    Please note that corrections may take a couple of weeks to filter through the various RePEc services.

    IDEAS is a RePEc service. RePEc uses bibliographic data supplied by the respective publishers.