Show simple item record

dc.contributor.authorChen, Lianguo
dc.contributor.authorXu, Ying
dc.contributor.authorWang, Wenxiong
dc.contributor.authorQian, Pei-Yuan
dc.date.accessioned2016-02-25T12:58:58Z
dc.date.available2016-02-25T12:58:58Z
dc.date.issued2015-01
dc.identifier.citationChen L, Xu Y, Wang W, Qian P-Y (2015) Degradation kinetics of a potent antifouling agent, butenolide, under various environmental conditions. Chemosphere 119: 1075–1083. Available: http://dx.doi.org/10.1016/j.chemosphere.2014.09.056.
dc.identifier.issn0045-6535
dc.identifier.pmid25460745
dc.identifier.doi10.1016/j.chemosphere.2014.09.056
dc.identifier.urihttp://hdl.handle.net/10754/597924
dc.description.abstract© 2014 Elsevier Ltd. Here, we investigated the degradation kinetics of butenolide, a promising antifouling compound, under various environmental conditions. The active ingredient of the commercial antifoulant SeaNine 211, 4,5-dichloro-2-n-octyl-4-isothiazolin-3-one (DCOIT), was used as positive control. The results showed that the degradation rate increased with increasing temperature. Half-lives of butenolide at 4. °C, 25. °C and 40. °C were. >64. d, 30.5. d and 3.9. d, respectively. Similar half-lives were recorded for DCOIT: >64. d at 4. °C, 27.9. d at 25. °C and 4.5. d at 40. °C. Exposure to sunlight accelerated the degradation of both butenolide and DCOIT. The photolysis half-lives of butenolide and DCOIT were 5.7. d and 6.8. d, respectively, compared with 9.7. d and 14.4. d for the dark control. Biodegradation led to the fastest rate of butenolide removal from natural seawater, with a half-life of 0.5. d, while no obvious degradation was observed for DCOIT after incubation for 4. d. The biodegradative ability of natural seawater for butenolide was attributed mainly to marine bacteria. During the degradation of butenolide and DCOIT, a gradual decrease in antifouling activity was observed, as indicated by the increased settlement percentage of cypris larvae from barnacle Balanus amphitrite. Besides, increased cell growth of marine diatom Skeletonema costatum demonstrated that the toxicity of seawater decreased gradually without generation of more toxic by-products. Overall, rapid degradation of butenolide in natural seawater supported its claim as a promising candidate for commercial antifouling industry.
dc.description.sponsorshipThis study was supported by Grants from China Mineral Resources Research and Development Association (COMRRDA12SC01) and from the Research Grant Council of HKSAR government (662413), and the King Abdullah University of Science and Technology (SA-C0040/UK-C0016) and the State Key Laboratory in Marine Pollution, City University of Hong Kong.
dc.publisherElsevier BV
dc.subjectAntifouling
dc.subjectButenolide
dc.subjectDCOIT
dc.subjectDegradation kinetics
dc.subjectToxicity
dc.titleDegradation kinetics of a potent antifouling agent, butenolide, under various environmental conditions
dc.typeArticle
dc.identifier.journalChemosphere
dc.contributor.institutionHong Kong University of Science and Technology, Hong Kong, China
kaust.grant.numberSA-C0040/UK-C0016


This item appears in the following Collection(s)

Show simple item record