Evaluation and selection of biochars and hydrochars derived from agricultural wastes for the use as adsorbent and energy storage materials Lang J. es_PE Matějová L. es_PE Cuentas-Gallegos A.K. es_PE Lobato-Peralta D.R. es_PE Ainassaari K. es_PE Gómez M.M. es_PE Solís J.L. es_PE Mondal D. es_PE Keiski R.L. es_PE Cruz G.J.F. es_PE 2024-05-30T23:13:38Z 2024-05-30T23:13:38Z 2021
dc.description.abstract The utilization of unconventional agricultural wastes to obtain new porous carbonaceous materials, at mild pyrolysis temperatures and without complex procedures, for either water treatment and energy storage applications is important from the economic and environmental perspective. In this study, biochars and hydrochars were prepared from banana rachis, cocoa pod husks, and rice husks at 600 °C-2 h, under nitrogen flux. The prepared materials were characterized to better understand how their morphological, textural, physical-chemical and/or structural properties correlate with their methylene blue (MB) adsorption capacities. The material with the best properties (mainly SBET > 800 m2/g) and MB adsorption capacity was a novel biochar prepared from banana rachis (BW-BC). This novel material was selected for additional kinetics and equilibrium adsorption tests for lead (Pb) along with its energy storage capacity. In equilibrium test, the novel biochar reached a maximum adsorption capacity for methylene blue of 243.4 mg/g and the highest adsorption capacity for Pb(II) of 179.7 mg/g. In the kinetic adsorption test, the equilibrium adsorption value for methylene blue was 150.4 mg/g and that for Pb(II) was 159.6 mg/g. Most importantly, the performance of the BW-BC material for energy storage in supercapacitors surpassed that of the commercial activated carbon YP50F, reaching specific energy values of 6.66 and 8.52 Wh/kg in acidic and neutral electrolytes, respectively. Among the evaluated hydrochar and biochars derived of agrowastes, the biochar prepared from banana rachis showed the best properties, being potentially useful as adsorbent or as an electrode material for energy storage. © 2021 Elsevier Ltd
dc.description.sponsorship The authors would like to thank Universidad Nacional de Tumbes (CANON Projects) and Peruvian National Council for Science and Technology ( CONCYTEC ) (Contract N° 024–2016-FONDECYT and Contract N ° 160–2018-FONDECYT) for financial support of this project. The Institute of Environmental Technology – Excellent Research (No. CZ.02.1.01/0.0/0.0/16_019/ 0000853) and the ESF in “Science without borders” project, reg. nr. CZ.02.2.69/0.0/0.0/16_027/0008463 within the Operational Program Research, Development and Education were thanked. D.R. Lobato-Peralta would like to thank the National Council of Science and Technology ( CONACYT ) for the grant for his Ph.D. studies and the projects IG100217 PAPIIT-DGAPA and 279953 from CONACYT. Thanks to Eber Herrera who participated in the experimental work.
dc.identifier.scopus 2-s2.0-85110330795
dc.language.iso eng
dc.publisher Elsevier Ltd
dc.relation.ispartof Journal of Environmental Chemical Engineering
dc.rights info:eu-repo/semantics/openAccess
dc.subject Water treatment
dc.subject Banana rachis es_PE
dc.subject Biochar es_PE
dc.subject Hydrochar es_PE
dc.subject Lead es_PE
dc.subject Supercapacitor es_PE
dc.title Evaluation and selection of biochars and hydrochars derived from agricultural wastes for the use as adsorbent and energy storage materials
dc.type info:eu-repo/semantics/article
dspace.entity.type Publication