Cobalt-impregnated biochar produced from CO2-mediated pyrolysis of Co/lignin as an enhanced catalyst for activating peroxymonosulfate to degrade acetaminophen

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dc.contributor.authorYang MT
dc.contributor.authorDu Y
dc.contributor.authorTong WC
dc.contributor.authorYip ACK
dc.contributor.authorLin KYA
dc.date.accessioned2019-05-29T21:31:57Z
dc.date.available2019-05-29T21:31:57Z
dc.date.issued2019en
dc.date.updated2019-04-14T14:46:48Z
dc.description.abstractWhile sulfate radical (SO4−)-based processes are useful to degrade acetaminophen (ACE), studies of using peroxymonosulfate (PMS) to degrade ACE are quite limited. In addition, although Co is validated as the most effective metal for activating PMS, very few Co catalysts have been developed and investigated for activating PMS to degrade ACE. Since carbon is a promising substrate to support Co nanoparticles (NPs) to form Co/carbon composite catalysts, most existing carbon substrates require delicate fabrications. As biochar is an easy-to-obtain but versatile carbon material, pyrolysis of Co/lignin affords an advantageous Co-impregnated biochar (CoIB) as an attractive catalyst for PMS activation. Specifically, as CO2 substitutes N2 as a reaction medium for pyrolysis of Co/lignin, the syngas production from pyrolysis can be substantially improved and a magnetic CoIB is afforded. This CoIB consists of evenly-distributed Co nanoparticles (NPs) impregnated in carbon matrices of biochar, and possesses several superior characteristics, such as high porosity, large surface area and magnetism, enabling CoIB a promising catalyst for activating PMS to degrade ACE. CoIB also shows a much higher catalytic activity of PMS activation than CoIBN2, and Co3O4 for degrading ACE. CoIB is also recyclable for activating PMS to effectively degrade ACE for multiple cycles. The ACE degradation pathway by this CoIB-activated PMS is proposed according to the degradation products. These findings validate that CoIB is assuredly an advantageous heterogeneous catalyst, which can be easily prepared from pyrolysis of Co/lignin in CO2 with concomitant enhanced syngas production for effectively activating PMS to degrade ACE.en
dc.identifier.citationYang MT, Du Y, Tong WC, Yip ACK, Lin KYA (2019). Cobalt-impregnated biochar produced from CO2-mediated pyrolysis of Co/lignin as an enhanced catalyst for activating peroxymonosulfate to degrade acetaminophen. Chemosphere. 226. 924-933.en
dc.identifier.doihttps://doi.org/10.1016/j.chemosphere.2019.04.004
dc.identifier.issn0045-6535
dc.identifier.urihttp://hdl.handle.net/10092/16757
dc.languageEnglish
dc.language.isoen
dc.publisherElsevier BVen
dc.rightsCreative Commons Attribution Non-Commercial No Derivatives Licenseen
dc.subjectBiocharen
dc.subjectcobalten
dc.subjectPMSen
dc.subjectAcetaminophenen
dc.subjectCO2en
dc.subjectpyrolysisen
dc.subject.anzsrcFields of Research::40 - Engineering::4004 - Chemical engineering::400408 - Reaction engineering (excl. nuclear reactions)en
dc.subject.anzsrcField of Research::09 - Engineering::0904 - Chemical Engineering::090410 - Water Treatment Processesen
dc.titleCobalt-impregnated biochar produced from CO2-mediated pyrolysis of Co/lignin as an enhanced catalyst for activating peroxymonosulfate to degrade acetaminophenen
dc.typeJournal Articleen
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