Refuse derived fuel char as a low-cost adsorbent for the cationic dye methylene blue

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Abstract

This work addresses the application of Refuse Derived Fuel (RDF) char as a low-cost adsorbent for methylene blue (MB) in batch mode, as an approach to remediate pigment contaminated effluents and a model for the adsorption of cationic analytes. The RDF char was tested without pre-treatment and after a cold alkali treatment to enhance adsorption. The adsorbents were characterized for proximate and ultimate composition, pHpzc and N2 adsorption/desorption behavior. Operation parameters such as pH, adsorbent dose, contact time, dye concentration and temperature were varied. Kinetic studies revealed that adsorption of methylene blue in the RDF chars followed a pseudo-second-order kinetic model. Adsorption isotherms showed differences in the possible adsorption mechanisms as a result of char activation. This work highlighted that RDF chars that are not suitable for energy conversion may be valorized as a low-cost adsorbents.

Original languageEnglish
Title of host publicationWastes: Solutions, Treatments and Opportunities III - Selected papers from the 5th International Conference Wastes: Solutions, Treatments and Opportunities, 2019
EditorsCândida Vilarinho, Fernando Castro, Margarida Gonçalves, Ana Luísa Fernando
PublisherCRC Press/Balkema
Pages549-554
Number of pages6
ISBN (Print)9780367257774
DOIs
Publication statusPublished - 2020
Event5th International Conference Wastes: Solutions, Treatments and Opportunities, 2019 - Costa da Caparica, Portugal
Duration: 4 Sep 20196 Sep 2019

Conference

Conference5th International Conference Wastes: Solutions, Treatments and Opportunities, 2019
CountryPortugal
CityCosta da Caparica
Period4/09/196/09/19

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