Effect of Pyrolysis Temperature on Mechanistic Transformation for Adsorption of Methylene Blue on Leached Rice-Straw Biochar

dc.contributor.authorBhardwaj, Akanksha
dc.contributor.authorNag, Shilpa
dc.contributor.authorDahiya, Amarjeet
dc.contributor.authorPandey, Puneeta
dc.contributor.authorArora, Meenu
dc.contributor.authorBabu, J. Nagendra
dc.date.accessioned2024-01-21T10:50:40Z
dc.date.accessioned2024-08-14T06:39:35Z
dc.date.available2024-01-21T10:50:40Z
dc.date.available2024-08-14T06:39:35Z
dc.date.issued2022-02-09T00:00:00
dc.description.abstractToxicity characteristic leaching procedure (TCLP) leached biochar is studied for adsorption of methylene blue (MB). Rice straw biochar obtained from slow pyrolysis at 400, 500, and 600��C, respectively, is TCLP leached to furnish leached biochar, BL4, BL5, and BL6. The leached biochar BL4�6 have been characterized for pH, CHN analysis, ash, zeta potential, surface area morphology and functional groups. Batch adsorption studies are optimized for pH (3�9), adsorbent dose (0.5�4�g�L?1), and initial MB concentration (20�135�mg�L?1). Nonlinear fitting to Langmuir, Freundlich, and Redlich-Peterson adsorption isotherm with due statistical treatment and error function analysis is carried out. Leached biochar, BL4, BL5, and BL6, is characterized by the dominance of carboxylic acid, lactone, and phenols moieties, respectively. The MB adsorption on leached biochar exhibits maximum adsorption of 26.87, 51.34, and 18.83�mg�g?1 for BL4, BL5, and BL6, respectively. The underlying mechanism for adsorption of MB using BL5, is characterized by non-ionic lactone ring opening in presence of MB under alkaline conditions that is supported by X-ray photoelectron spectroscopy(XPS) and Fourier transformed infrared spectroscopy (FTIR) studies. Desorption of MB and regeneration from BL5 is studied with methanol and 0.1 m HCl as stripping solvent for four cycles. Recovery of MB is better with methanol in comparison to 0.1 m HCl. � 2022 Wiley-VCH GmbH.en_US
dc.identifier.doi10.1002/clen.202100108
dc.identifier.issn18630650
dc.identifier.urihttps://kr.cup.edu.in/handle/32116/3980
dc.identifier.urlhttps://onlinelibrary.wiley.com/doi/10.1002/clen.202100108
dc.language.isoen_USen_US
dc.publisherJohn Wiley and Sons Incen_US
dc.subjectbiocharen_US
dc.subjectboehm titrationen_US
dc.subjection-exchangeen_US
dc.subjectlactoneen_US
dc.subjectzeta potentialen_US
dc.titleEffect of Pyrolysis Temperature on Mechanistic Transformation for Adsorption of Methylene Blue on Leached Rice-Straw Biocharen_US
dc.title.journalClean - Soil, Air, Wateren_US
dc.typeArticleen_US
dc.type.accesstypeClosed Accessen_US

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