Efficient activated carbons from chars of the co-pyrolysis of rice wastes

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Chars obtained from the co-pyrolysis of rice husk (50% w/w) and polyethylene (50% w/w) were converted to activated carbons by physical activation. A fraction of the resulting activated carbon (PCPA) was submitted to chemical treatment with HNO 3 for functionalization purposes (PCAPCT). Both activated carbons were used in Cr(III) removal assays from liquid-phase. A commercial activated carbon, either submitted or not submitted to HNO 3 treatment (CACCT and CAC, respectively) was used for comparison purposes. During Cr(III) removal assays, two different solid/liquid ratios (S/L) were tested: 5.0 and 10.0 g L −1 . Concerning Cr(III) removal, PCPA was more efficient than CAC; with a S/L ratio of 10.0 g L −1 , PCPA was able to remove 99.9% of Cr(III) by precipitation. On the other hand, PCPACT performed slightly better with a S/L ratio of 5 g L −1 than CACCT, with 50.9% Cr(III) removed only by adsorption mechanism.

Original languageEnglish
Title of host publicationWASTES - Solutions, Treatments and Opportunities II - Selected papers from the 4th edition of the International Conference Wastes: Solutions, Treatments and Opportunities, 2017
EditorsMaria de Lurdes Lopes, Cândida Vilarinho, Fernando Castro
PublisherCRC Press/Balkema
Pages359-364
Number of pages6
ISBN (Print)78-113819669-8
DOIs
Publication statusPublished - 1 Jan 2018
Event4th International Conference Wastes: Solutions, Treatments and Opportunities, WASTES 2017 - Porto, Portugal
Duration: 25 Sep 201726 Sep 2017

Conference

Conference4th International Conference Wastes: Solutions, Treatments and Opportunities, WASTES 2017
CountryPortugal
CityPorto
Period25/09/1726/09/17

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