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Detoxification of fermentable broth with activated biocarbon resulting from pyrolysis of agroforestry residues
Author(s) -
Martins Ayrton F.,
Villetti Marcos A.,
Mortari Sérgio R.,
Pedroso Giovanni B.,
Saldanha Loisleini F.,
Rambo Magale K. D.
Publication year - 2021
Publication title -
water environment research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.356
H-Index - 73
eISSN - 1554-7531
pISSN - 1061-4303
DOI - 10.1002/wer.1505
Subject(s) - activated carbon , sawdust , pyrolysis , pulp and paper industry , adsorption , chemistry , freundlich equation , biomass (ecology) , biorefinery , langmuir , bioproducts , bet theory , waste management , nuclear chemistry , biofuel , raw material , organic chemistry , agronomy , biology , engineering
Carbon‐like materials from pyrolysis (<500°C) of agricultural leftovers (rice husks, eucalyptus sawdust and peach stones) were submitted to steam activation and the expected adsorbent properties evaluated by means of a chemical method (methylene blue) and physically characterized by scanning electron microscopy (SEM), thermogravimetric analysis (TGA) and surface area (BET). Batch experiments were carried out to check the pH effect on the adsorption of methylene blue, by evaluating the respective equilibrium isotherms (Langmuir, Freundlich and Temkin). The steam‐activated biocarbons showed significant adsorbent capacity, which increased along with pH. The best performance was achieved by the activated biocarbon from peach stones, which showed adsorptive properties similar to activated carbon market. The suitable detoxification efficiency of untreated broths with activated biocarbon, and an increase in the required fermentability, supports the potential use of these adsorptive bioproducts from agricultural leftovers. The profitable use of agricultural waste materials is actually a welcome strategy for consolidating the biorefinery concept as well as ensuring planetary sustainability. Practitioner points Use of biomass residues for detoxification of fermentable broth. The activated biocarbons showed significant adsorbent capacity similar to activated carbon market. The results revealed the potential of the biomass residues as a promising source within bio‐refineries.