Comparative study of the efficiency of synthetic and natural mediators in laccase-assisted bleaching of eucalyptus kraft pulp
The natural phenolic compounds syringaldehyde and vanillin were compared to the synthetic mediators 1-hydroxybenzotriazole, violuric acid and promazine in terms of boosting efficiency in a laccase-assisted biobleaching of eucalyptus kraft pulp. Violuric acid and 1-hydroxybenzotriazole revealed to be...
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| Veröffentlicht in: | Bioresource technology 2008-11, Vol.99 (17), p.7959-7965 |
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| creator | Moldes, D. Díaz, M. Tzanov, T. Vidal, T. |
| description | The natural phenolic compounds syringaldehyde and vanillin were compared to the synthetic mediators 1-hydroxybenzotriazole, violuric acid and promazine in terms of boosting efficiency in a laccase-assisted biobleaching of eucalyptus kraft pulp. Violuric acid and 1-hydroxybenzotriazole revealed to be the most effective mediators of the bioprocess. Nevertheless, laccase-syringaldehyde system also improved the final pulp properties (28% delignification and 63.5% ISO brightness) compared to the process without mediator (23% and 61.5% respectively), in addition to insignificant denaturation effect over laccase. The efficiency of the biobleaching process was further related to changes in non-conventionally used optical and chromatic parameters of pulp, such as (L
∗), chroma (C
∗) and dye removal index (DRI) showing good correlation. Adverse coupling reactions of the natural phenolic mediators on pulp lignin were predicted by electrochemical studies, demonstrating the complexity of the laccase-mediator reaction on pulp. |
| doi_str_mv | 10.1016/j.biortech.2008.04.002 |
| format | Article |
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∗), chroma (C
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∗), chroma (C
∗) and dye removal index (DRI) showing good correlation. Adverse coupling reactions of the natural phenolic mediators on pulp lignin were predicted by electrochemical studies, demonstrating the complexity of the laccase-mediator reaction on pulp.</description><subject>Applied sciences</subject><subject>Barbiturates - metabolism</subject><subject>Benzaldehydes - chemistry</subject><subject>Benzaldehydes - metabolism</subject><subject>Biological and medical sciences</subject><subject>Bleaching</subject><subject>Color</subject><subject>Electrochemistry</subject><subject>Eucalyptus</subject><subject>Eucalyptus - metabolism</subject><subject>Exact sciences and technology</subject><subject>Fundamental and applied biological sciences. Psychology</subject><subject>Industrial Waste</subject><subject>Kraft pulp</subject><subject>Laccase</subject><subject>Laccase - metabolism</subject><subject>Optical properties</subject><subject>Paper and paperboard manufacturing</subject><subject>Paper, paperboard, non wovens</subject><subject>Peroxides - metabolism</subject><subject>Phenols - metabolism</subject><subject>Polymer industry, paints, wood</subject><subject>Promazine - metabolism</subject><subject>Pulp manufacturing</subject><subject>Spectrum Analysis</subject><subject>Triazoles - metabolism</subject><subject>Wood. Paper. Non wovens</subject><issn>0960-8524</issn><issn>1873-2976</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2008</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><recordid>eNqFkU1v1DAQhi0EokvhL1S-wC3BduzYvoFWfFSqxAXO1tiZsF6ySbCdSnvofyfbXeDYk6XRM-9Y70PIDWc1Z7x9v699nFLBsKsFY6ZmsmZMPCMbbnRTCavb52TDbMsqo4S8Iq9y3jPGGq7FS3LFjbRWKrYhD9vpMEOCEu-R5rJ0Rzr1tOyQYt_HEHEMj5N8HNdhiYHC2NERypJgoAfsIpQpZRpHOkAIkLGCnGMu2FE_IIRdHH-eAnAJMBznsmT6K0Ff6LwM82vyooch45vLe01-fP70ffu1uvv25Xb78a4KUplSKWgFcs8gqFYIyySYLiiLxnKlwfigZfDaA3Tct6CFtVq3ne288rIxfdNck3fn3DlNvxfMxR1iDjgMMOK0ZCc4a1TTyidBLo1mhvMVbM9gSFPOCXs3p3iAdHScuZMht3d_DbmTIcekWw2tizeXC4tf6_u_dlGyAm8vAOS1sj7BGGL-xwmmjFH6FPThzOFa3H3E5PKjrlVJwlBcN8Wn_vIHBSC1Bw</recordid><startdate>20081101</startdate><enddate>20081101</enddate><creator>Moldes, D.</creator><creator>Díaz, M.</creator><creator>Tzanov, T.</creator><creator>Vidal, T.</creator><general>Elsevier Ltd</general><general>Elsevier</general><scope>IQODW</scope><scope>CGR</scope><scope>CUY</scope><scope>CVF</scope><scope>ECM</scope><scope>EIF</scope><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7ST</scope><scope>C1K</scope><scope>SOI</scope><scope>7QO</scope><scope>8FD</scope><scope>FR3</scope><scope>P64</scope></search><sort><creationdate>20081101</creationdate><title>Comparative study of the efficiency of synthetic and natural mediators in laccase-assisted bleaching of eucalyptus kraft pulp</title><author>Moldes, D. ; Díaz, M. ; Tzanov, T. ; Vidal, T.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c458t-5a62e1b0ac5622904a8dc59e89157a8bc74cb7baad1b6a7299776d9db5b438f33</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2008</creationdate><topic>Applied sciences</topic><topic>Barbiturates - metabolism</topic><topic>Benzaldehydes - chemistry</topic><topic>Benzaldehydes - metabolism</topic><topic>Biological and medical sciences</topic><topic>Bleaching</topic><topic>Color</topic><topic>Electrochemistry</topic><topic>Eucalyptus</topic><topic>Eucalyptus - metabolism</topic><topic>Exact sciences and technology</topic><topic>Fundamental and applied biological sciences. Psychology</topic><topic>Industrial Waste</topic><topic>Kraft pulp</topic><topic>Laccase</topic><topic>Laccase - metabolism</topic><topic>Optical properties</topic><topic>Paper and paperboard manufacturing</topic><topic>Paper, paperboard, non wovens</topic><topic>Peroxides - metabolism</topic><topic>Phenols - metabolism</topic><topic>Polymer industry, paints, wood</topic><topic>Promazine - metabolism</topic><topic>Pulp manufacturing</topic><topic>Spectrum Analysis</topic><topic>Triazoles - metabolism</topic><topic>Wood. Paper. Non wovens</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Moldes, D.</creatorcontrib><creatorcontrib>Díaz, M.</creatorcontrib><creatorcontrib>Tzanov, T.</creatorcontrib><creatorcontrib>Vidal, T.</creatorcontrib><collection>Pascal-Francis</collection><collection>Medline</collection><collection>MEDLINE</collection><collection>MEDLINE (Ovid)</collection><collection>MEDLINE</collection><collection>MEDLINE</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>Environment Abstracts</collection><collection>Environmental Sciences and Pollution Management</collection><collection>Environment Abstracts</collection><collection>Biotechnology Research Abstracts</collection><collection>Technology Research Database</collection><collection>Engineering Research Database</collection><collection>Biotechnology and BioEngineering Abstracts</collection><jtitle>Bioresource technology</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Moldes, D.</au><au>Díaz, M.</au><au>Tzanov, T.</au><au>Vidal, T.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Comparative study of the efficiency of synthetic and natural mediators in laccase-assisted bleaching of eucalyptus kraft pulp</atitle><jtitle>Bioresource technology</jtitle><addtitle>Bioresour Technol</addtitle><date>2008-11-01</date><risdate>2008</risdate><volume>99</volume><issue>17</issue><spage>7959</spage><epage>7965</epage><pages>7959-7965</pages><issn>0960-8524</issn><eissn>1873-2976</eissn><abstract>The natural phenolic compounds syringaldehyde and vanillin were compared to the synthetic mediators 1-hydroxybenzotriazole, violuric acid and promazine in terms of boosting efficiency in a laccase-assisted biobleaching of eucalyptus kraft pulp. Violuric acid and 1-hydroxybenzotriazole revealed to be the most effective mediators of the bioprocess. Nevertheless, laccase-syringaldehyde system also improved the final pulp properties (28% delignification and 63.5% ISO brightness) compared to the process without mediator (23% and 61.5% respectively), in addition to insignificant denaturation effect over laccase. The efficiency of the biobleaching process was further related to changes in non-conventionally used optical and chromatic parameters of pulp, such as (L
∗), chroma (C
∗) and dye removal index (DRI) showing good correlation. Adverse coupling reactions of the natural phenolic mediators on pulp lignin were predicted by electrochemical studies, demonstrating the complexity of the laccase-mediator reaction on pulp.</abstract><cop>Kidlington</cop><pub>Elsevier Ltd</pub><pmid>18499450</pmid><doi>10.1016/j.biortech.2008.04.002</doi><tpages>7</tpages></addata></record> |
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| subjects | Applied sciences Barbiturates - metabolism Benzaldehydes - chemistry Benzaldehydes - metabolism Biological and medical sciences Bleaching Color Electrochemistry Eucalyptus Eucalyptus - metabolism Exact sciences and technology Fundamental and applied biological sciences. Psychology Industrial Waste Kraft pulp Laccase Laccase - metabolism Optical properties Paper and paperboard manufacturing Paper, paperboard, non wovens Peroxides - metabolism Phenols - metabolism Polymer industry, paints, wood Promazine - metabolism Pulp manufacturing Spectrum Analysis Triazoles - metabolism Wood. Paper. Non wovens |
| title | Comparative study of the efficiency of synthetic and natural mediators in laccase-assisted bleaching of eucalyptus kraft pulp |
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