Polyethyleneimine modification of activated fly ash and biochar for enhanced removal of natural organic matter from water via adsorption
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Truong, Hai Bang | - |
dc.contributor.author | Ike, Ikechukwu A. | - |
dc.contributor.author | Ok, Yong Sik | - |
dc.contributor.author | Hur, Jin | - |
dc.date.accessioned | 2021-08-31T08:52:45Z | - |
dc.date.available | 2021-08-31T08:52:45Z | - |
dc.date.created | 2021-06-18 | - |
dc.date.issued | 2020-03 | - |
dc.identifier.issn | 0045-6535 | - |
dc.identifier.uri | https://scholar.korea.ac.kr/handle/2021.sw.korea/57512 | - |
dc.description.abstract | In this study, fly ash (FA) and biochar (BC), two common industrial byproducts, were activated and surface-modified with polyethyleneimine (PEI) to enhance their capacities to remove natural organic matter (NOM) from water via adsorption. Different fluorescent components were identified using fluorescence excitation-emission matrix coupled with parallel factor analysis (EEM-PARAFAC) to explore the individual adsorption behaviors of different organic constituents in a bulk NOM. The NOM adsorption was quantitatively examined via adsorption isotherm and kinetics models. Compared to the pristine adsorbents, the functionalized adsorbent with increased surface area and positive surface charge achieved higher NOM adsorption. By evaluating the adsorptive behaviors of UV-absorbing and fluorescent moieties, it was concluded that the operative mechanism of adsorption included electrostatic attraction, hydrogen bonding, and It-IC interaction. At the optimal pH of 3, the surface-modified FA and BC (i.e., FA-PEI and BC-PEI) had adsorption capacities for NOM that were -3 times higher than the capacities of the pristine materials. Due to its aromatic features, it-it interaction may have enhanced BC and BC-PEI selective adsorption of aromatic NOM components compared to FA and FA-PEI. Kinetic modelling showed that the mesopores of FA-PEI were available for NOM adsorption and diffusion of NOM molecules into the mesoporous structures was rate-limiting. On the other hand, PEI-modification may have further reduced NOM diffusion through the narrow micropores in BC such that external adsorption primarily occurred on BC-PEI. The modified adsorbents showed a faster adsorption kinetics than the pristine counterparts and a high durability in repeated adsorption-desorption cycles. (C) 2019 Elsevier Ltd. All rights reserved. | - |
dc.language | English | - |
dc.language.iso | en | - |
dc.publisher | PERGAMON-ELSEVIER SCIENCE LTD | - |
dc.subject | CONTROLLING HALOGENATED DBPS | - |
dc.subject | HUMIC-ACID | - |
dc.subject | AQUEOUS-SOLUTION | - |
dc.subject | FLUORESCENCE | - |
dc.subject | NOM | - |
dc.subject | DISINFECTION | - |
dc.subject | SUBSTANCES | - |
dc.subject | BEHAVIOR | - |
dc.subject | MARINE | - |
dc.subject | OXIDE | - |
dc.title | Polyethyleneimine modification of activated fly ash and biochar for enhanced removal of natural organic matter from water via adsorption | - |
dc.type | Article | - |
dc.contributor.affiliatedAuthor | Ok, Yong Sik | - |
dc.identifier.doi | 10.1016/j.chemosphere.2019.125454 | - |
dc.identifier.scopusid | 2-s2.0-85075558721 | - |
dc.identifier.wosid | 000512221100032 | - |
dc.identifier.bibliographicCitation | CHEMOSPHERE, v.243 | - |
dc.relation.isPartOf | CHEMOSPHERE | - |
dc.citation.title | CHEMOSPHERE | - |
dc.citation.volume | 243 | - |
dc.type.rims | ART | - |
dc.type.docType | Article | - |
dc.description.journalClass | 1 | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.relation.journalResearchArea | Environmental Sciences & Ecology | - |
dc.relation.journalWebOfScienceCategory | Environmental Sciences | - |
dc.subject.keywordPlus | CONTROLLING HALOGENATED DBPS | - |
dc.subject.keywordPlus | HUMIC-ACID | - |
dc.subject.keywordPlus | AQUEOUS-SOLUTION | - |
dc.subject.keywordPlus | FLUORESCENCE | - |
dc.subject.keywordPlus | NOM | - |
dc.subject.keywordPlus | DISINFECTION | - |
dc.subject.keywordPlus | SUBSTANCES | - |
dc.subject.keywordPlus | BEHAVIOR | - |
dc.subject.keywordPlus | MARINE | - |
dc.subject.keywordPlus | OXIDE | - |
dc.subject.keywordAuthor | Biochar | - |
dc.subject.keywordAuthor | Fly ash | - |
dc.subject.keywordAuthor | Natural organic matter | - |
dc.subject.keywordAuthor | EEM-PARAFAC | - |
dc.subject.keywordAuthor | Adsorbent | - |
dc.subject.keywordAuthor | Polyethyleneimine | - |
Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.
(02841) 서울특별시 성북구 안암로 14502-3290-1114
COPYRIGHT © 2021 Korea University. All Rights Reserved.
Certain data included herein are derived from the © Web of Science of Clarivate Analytics. All rights reserved.
You may not copy or re-distribute this material in whole or in part without the prior written consent of Clarivate Analytics.