Publicação
Evaluation of the adsorption capacity of a new cellulose-based polymer
| Resumo: | A novel cellulose-based polymer, dicarboxymethyl cellulose (DCMC), was synthesized from cellulose and sodium 2-bromomalonate. Inductively coupled plasma atomic emission spectrometry (ICP-AES) and Fourier-transform infrared spectroscopy (FTIR) were employed to characterize the polymer. The size of the particles ranged between 10 and 100 µm. Equilibrium and kinetic adsorption studies were performed to evaluate its suitability for methylene blue removal at different pH. Equilibrium adsorption data was analyzed using Langmuir and Freundlich isotherms. At pH = 3, adsorption isotherms followed the Langmuir model with a maximum adsorption capacity of 887.6 mg/g. At pH = 6.4, the adsorption isotherms produced an S-shape and were fitted with the Sips model, giving a maximum uptake of 1354.6 mg/g. Pseudo second-order kinetic model provided the best fit of the experimental data. The reusability of DCMC was evaluated. After the first cycle, adsorption decreased 30%. Adsorption coupled with membrane filtration allowed complete removal. The adsorption of cytochrome C was evaluated. The adsorption process followed the Langmuir adsorption isotherm, giving a maximum uptake of 1279.6 mg/g. Pseudo second-order kinetic model adjusted well the experimental data. DCMC was successfully regenerated and reused without compromising performance. After three cycles, adsorption efficiency was above 90%. |
|---|---|
| Autores principais: | Gago, Diana Xavier Cardoso Torres |
| Assunto: | Adsorption isotherms Adsorption kinetics Dicarboxymethyl cellulose Dye removal Low-cost adsorbents Protein purification |
| Ano: | 2019 |
| País: | Portugal |
| Tipo de documento: | dissertação de mestrado |
| Tipo de acesso: | acesso aberto |
| Instituição associada: | Universidade Nova de Lisboa |
| Idioma: | inglês |
| Origem: | Repositório Institucional da UNL |
| _version_ | 1868415162823737344 |
|---|---|
| author | Gago, Diana Xavier Cardoso Torres |
| author_facet | Gago, Diana Xavier Cardoso Torres |
| author_role | author |
| contributor_name_str_mv | Coelhoso, Isabel Chagas, Ricardo RUN |
| country_str | PT |
| creators_json_txt | [{\"Person.name\":\"Gago, Diana Xavier Cardoso Torres\"}] |
| datacite.contributors.contributor.contributorName.fl_str_mv | Coelhoso, Isabel Chagas, Ricardo RUN |
| datacite.creators.creator.creatorName.fl_str_mv | Gago, Diana Xavier Cardoso Torres |
| datacite.date.Accepted.fl_str_mv | 2019-10-10T00:00:00Z |
| datacite.date.available.fl_str_mv | 2020-10-31T01:30:45Z |
| datacite.date.embargoed.fl_str_mv | 2020-10-31T01:30:45Z |
| datacite.rights.fl_str_mv | http://purl.org/coar/access_right/c_abf2 |
| datacite.subjects.subject.fl_str_mv | Adsorption isotherms Adsorption kinetics Dicarboxymethyl cellulose Dye removal Low-cost adsorbents Protein purification |
| datacite.titles.title.fl_str_mv | Evaluation of the adsorption capacity of a new cellulose-based polymer |
| dc.contributor.none.fl_str_mv | Coelhoso, Isabel Chagas, Ricardo RUN |
| dc.creator.none.fl_str_mv | Gago, Diana Xavier Cardoso Torres |
| dc.date.Accepted.fl_str_mv | 2019-10-10T00:00:00Z |
| dc.date.available.fl_str_mv | 2020-10-31T01:30:45Z |
| dc.date.embargoed.fl_str_mv | 2020-10-31T01:30:45Z |
| dc.format.none.fl_str_mv | application/pdf |
| dc.identifier.none.fl_str_mv | http://hdl.handle.net/10362/84553 |
| dc.language.none.fl_str_mv | eng |
| dc.rights.none.fl_str_mv | http://purl.org/coar/access_right/c_abf2 |
| dc.subject.none.fl_str_mv | Adsorption isotherms Adsorption kinetics Dicarboxymethyl cellulose Dye removal Low-cost adsorbents Protein purification |
| dc.title.fl_str_mv | Evaluation of the adsorption capacity of a new cellulose-based polymer |
| dc.type.none.fl_str_mv | http://purl.org/coar/resource_type/c_bdcc |
| description | A novel cellulose-based polymer, dicarboxymethyl cellulose (DCMC), was synthesized from cellulose and sodium 2-bromomalonate. Inductively coupled plasma atomic emission spectrometry (ICP-AES) and Fourier-transform infrared spectroscopy (FTIR) were employed to characterize the polymer. The size of the particles ranged between 10 and 100 µm. Equilibrium and kinetic adsorption studies were performed to evaluate its suitability for methylene blue removal at different pH. Equilibrium adsorption data was analyzed using Langmuir and Freundlich isotherms. At pH = 3, adsorption isotherms followed the Langmuir model with a maximum adsorption capacity of 887.6 mg/g. At pH = 6.4, the adsorption isotherms produced an S-shape and were fitted with the Sips model, giving a maximum uptake of 1354.6 mg/g. Pseudo second-order kinetic model provided the best fit of the experimental data. The reusability of DCMC was evaluated. After the first cycle, adsorption decreased 30%. Adsorption coupled with membrane filtration allowed complete removal. The adsorption of cytochrome C was evaluated. The adsorption process followed the Langmuir adsorption isotherm, giving a maximum uptake of 1279.6 mg/g. Pseudo second-order kinetic model adjusted well the experimental data. DCMC was successfully regenerated and reused without compromising performance. After three cycles, adsorption efficiency was above 90%. |
| dirty | 0 |
| eu_rights_str_mv | openAccess |
| format | masterThesis |
| fulltext.url.fl_str_mv | https://run.unl.pt/bitstreams/be65ef14-8938-4884-ae13-99cdccf022ab/download |
| id | run_c6d7b7bbcef3f397d529901ea14dccda |
| identifier.url.fl_str_mv | http://hdl.handle.net/10362/84553 |
| instacron_str | unl |
| institution | Universidade Nova de Lisboa |
| instname_str | Universidade Nova de Lisboa |
| language | eng |
| network_acronym_str | run |
| network_name_str | Repositório Institucional da UNL |
| oai_identifier_str | oai:run.unl.pt:10362/84553 |
| organization_str_mv | urn:organizationAcronym:unl |
| person_str_mv | Gago, Diana Xavier Cardoso Torres |
| publishDate | 2019 |
| reponame_str | Repositório Institucional da UNL |
| repository_id_str | urn:repositoryAcronym:run |
| service_str_mv | urn:repositoryAcronym:run |
| spelling | engpt_PTA novel cellulose-based polymer, dicarboxymethyl cellulose (DCMC), was synthesized from cellulose and sodium 2-bromomalonate. Inductively coupled plasma atomic emission spectrometry (ICP-AES) and Fourier-transform infrared spectroscopy (FTIR) were employed to characterize the polymer. The size of the particles ranged between 10 and 100 µm. Equilibrium and kinetic adsorption studies were performed to evaluate its suitability for methylene blue removal at different pH. Equilibrium adsorption data was analyzed using Langmuir and Freundlich isotherms. At pH = 3, adsorption isotherms followed the Langmuir model with a maximum adsorption capacity of 887.6 mg/g. At pH = 6.4, the adsorption isotherms produced an S-shape and were fitted with the Sips model, giving a maximum uptake of 1354.6 mg/g. Pseudo second-order kinetic model provided the best fit of the experimental data. The reusability of DCMC was evaluated. After the first cycle, adsorption decreased 30%. Adsorption coupled with membrane filtration allowed complete removal. The adsorption of cytochrome C was evaluated. The adsorption process followed the Langmuir adsorption isotherm, giving a maximum uptake of 1279.6 mg/g. Pseudo second-order kinetic model adjusted well the experimental data. DCMC was successfully regenerated and reused without compromising performance. After three cycles, adsorption efficiency was above 90%.application/pdfpt_PTEvaluation of the adsorption capacity of a new cellulose-based polymerGago, Diana Xavier Cardoso TorresCoelhoso, IsabelChagas, RicardoHostingInstitutionOrganizationalRUNe-mailmailto:run@unl.ptrun@unl.pt2020-10-31T01:30:45Z2019-10-1020192019-10-10T00:00:00ZHandlehttp://hdl.handle.net/10362/84553http://purl.org/coar/access_right/c_abf2open accessAdsorption isothermsAdsorption kineticsDicarboxymethyl celluloseDye removalLow-cost adsorbentsProtein purification8081740 bytesliteraturehttp://purl.org/coar/resource_type/c_bdccmaster thesishttp://purl.org/coar/access_right/c_abf2application/pdffulltexthttps://run.unl.pt/bitstreams/be65ef14-8938-4884-ae13-99cdccf022ab/download |
| spellingShingle | Evaluation of the adsorption capacity of a new cellulose-based polymer Gago, Diana Xavier Cardoso Torres Adsorption isotherms Adsorption kinetics Dicarboxymethyl cellulose Dye removal Low-cost adsorbents Protein purification |
| status | SINGLETON |
| subject.fl_str_mv | Adsorption isotherms Adsorption kinetics Dicarboxymethyl cellulose Dye removal Low-cost adsorbents Protein purification |
| title | Evaluation of the adsorption capacity of a new cellulose-based polymer |
| title_full | Evaluation of the adsorption capacity of a new cellulose-based polymer |
| title_fullStr | Evaluation of the adsorption capacity of a new cellulose-based polymer |
| title_full_unstemmed | Evaluation of the adsorption capacity of a new cellulose-based polymer |
| title_short | Evaluation of the adsorption capacity of a new cellulose-based polymer |
| title_sort | Evaluation of the adsorption capacity of a new cellulose-based polymer |
| topic | Adsorption isotherms Adsorption kinetics Dicarboxymethyl cellulose Dye removal Low-cost adsorbents Protein purification |
| topic_facet | Adsorption isotherms Adsorption kinetics Dicarboxymethyl cellulose Dye removal Low-cost adsorbents Protein purification |
| url | http://hdl.handle.net/10362/84553 |
| visible | 1 |