Phycoremediation of pesticides using microalgae
Every year, pesticides are found in surface and ground waters in Sweden. Fungicides are in common usage and applied in high amounts against potato late blight. The present thesis examined the possible removal of four fungicides (metalaxyl, cyprodinil, propamocarb and mandipropamid) from water using...
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| Formato: | H2 |
| Lenguaje: | Inglés sueco |
| Publicado: |
SLU/Dept. of Biosystems and Technology (from 130101)
2014
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| Materias: |
| _version_ | 1855571167739379712 |
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| author | Ardal, Embla |
| author_browse | Ardal, Embla |
| author_facet | Ardal, Embla |
| author_sort | Ardal, Embla |
| collection | Epsilon Archive for Student Projects |
| description | Every year, pesticides are found in surface and ground waters in Sweden. Fungicides are in common usage and applied in high amounts against potato late blight. The present thesis examined the possible removal of four fungicides (metalaxyl, cyprodinil, propamocarb and
mandipropamid) from water using the microalgae Chlorella vulgaris. Microorganisms are capable of decomposing a range of organic pollutants and the main focus in previously published studies has been on bacteria and fungi. Microalgae are mostly studied due to their high capacity
in biosorbing heavy metals. Removal of organic pollutants such as pesticides has been reported, however in fewer studies. The work was divided into two main experiments; one short-term experiment (60 min) using dead and living cells, and one long-term experiment (4 days) using
growing cells. In the long-term experiment, the presence of growing algae resulted in around 50% lower propamocarb concentration in the medium compared with final concentration in the control without algae. In the short-term study, the presence of live algae cells led to a 30% reduction of propamocarb, compared to the concentration in the control. The main mechanism behind the reduction of propamocarb in the water phase is proposed to be biosorption onto the algal cells. This conclusion is based on the short duration required for removal to occur. For the
other three studied fungicides no removal from the water phase by the algal treatments was observed. |
| format | H2 |
| id | RepoSLU7343 |
| institution | Swedish University of Agricultural Sciences |
| language | Inglés swe |
| publishDate | 2014 |
| publishDateSort | 2014 |
| publisher | SLU/Dept. of Biosystems and Technology (from 130101) |
| publisherStr | SLU/Dept. of Biosystems and Technology (from 130101) |
| record_format | eprints |
| spelling | RepoSLU73432015-10-21T14:27:44Z Phycoremediation of pesticides using microalgae Möjligheter med odling av mikroalger för rening av bekämpningsmedelsrester i vatten Ardal, Embla bioremediation biosorption Chlorella vulgaris fungicides microalgae pesticides phycoremediation Every year, pesticides are found in surface and ground waters in Sweden. Fungicides are in common usage and applied in high amounts against potato late blight. The present thesis examined the possible removal of four fungicides (metalaxyl, cyprodinil, propamocarb and mandipropamid) from water using the microalgae Chlorella vulgaris. Microorganisms are capable of decomposing a range of organic pollutants and the main focus in previously published studies has been on bacteria and fungi. Microalgae are mostly studied due to their high capacity in biosorbing heavy metals. Removal of organic pollutants such as pesticides has been reported, however in fewer studies. The work was divided into two main experiments; one short-term experiment (60 min) using dead and living cells, and one long-term experiment (4 days) using growing cells. In the long-term experiment, the presence of growing algae resulted in around 50% lower propamocarb concentration in the medium compared with final concentration in the control without algae. In the short-term study, the presence of live algae cells led to a 30% reduction of propamocarb, compared to the concentration in the control. The main mechanism behind the reduction of propamocarb in the water phase is proposed to be biosorption onto the algal cells. This conclusion is based on the short duration required for removal to occur. For the other three studied fungicides no removal from the water phase by the algal treatments was observed. Varje år detekteras pesticidrester i yt- och grundvattnet i Sverige. Fungicider används i stor skala mot potatisbladmögel. Mikroorganismer är kapabla att bryta ner en rad olika organiska föroreningar och fokus på den här typen av studier har oftast legat på bakterier och svampar. När liknande studier gjorts på mikroalger har fokus legat på deras goda förmåga att biosorbera tungmetaller. Dock har rening av vatten från organiska föroreningar såsom pesticider rapporterats men dessa har varit få. Detta uppsatsarbete undersökte därför möjligheterna att minska mängden av fyra fungicider (metalaxyl, cyprodinil, propamocarb and mandipropamid) lösta i vatten med hjälp av mikroalgen Chlorella vulgaris. Uppsatsarbetet var uppdelat i två delar; ett korttids-experiment (60 min) med biomassa från levande och döda mikroalger, och ett långtids-experiment (4 dagar) med levande alger. I långtids-experimentet sjönk koncentrationen av propamocarb i lösningen med ca 50% i närvaro av levande alger jämfört med kontrollen där inga alger fanns närvarande. I korttids-experimentet minskade koncentrationen av propamocarb med ungefär 30% i närvaron av levande alger jämfört med kontrollen utan alger. Huvudorsaken till minskningen av propamocarbs beror troligtvis på biosorption som sker på algernas cellväggar. Denna slutsats har dragits baserat på den korta tidsperiod för under vilken minskningen av propamocarb sker. Ingen av de övriga tre fungiciderna minskade i koncentration på grund av mikroalgens närvaro. SLU/Dept. of Biosystems and Technology (from 130101) 2014 H2 eng swe https://stud.epsilon.slu.se/7343/ |
| spellingShingle | bioremediation biosorption Chlorella vulgaris fungicides microalgae pesticides phycoremediation Ardal, Embla Phycoremediation of pesticides using microalgae |
| title | Phycoremediation of pesticides using microalgae |
| title_full | Phycoremediation of pesticides using microalgae |
| title_fullStr | Phycoremediation of pesticides using microalgae |
| title_full_unstemmed | Phycoremediation of pesticides using microalgae |
| title_short | Phycoremediation of pesticides using microalgae |
| title_sort | phycoremediation of pesticides using microalgae |
| topic | bioremediation biosorption Chlorella vulgaris fungicides microalgae pesticides phycoremediation |