Effects of metal pollution and macronutrient enrichment on the photoproduction of hydroxyl radicals in seawater by the alga Dunaliella salina
The marine microalga Dunaliella salina was used as a model organism in this study. Hydroxyl radicals ((OH)-O-center dot) were determined using HPLC with sodium benzoate as a probe, and the photochemical activity of marine alga in the formation of (OH)-O-center dot was confirmed for the first time. C...
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ftxiamenuniv:oai:dspace.xmu.edu.cn:2288/60448 2023-05-15T14:04:18+02:00 Effects of metal pollution and macronutrient enrichment on the photoproduction of hydroxyl radicals in seawater by the alga Dunaliella salina Li, S. X. Hong, H. S. Zheng, F. Y. Deng, N. S. 洪华生 2008-01-16 http://dspace.xmu.edu.cn/handle/2288/60448 en_US eng Marine Chemistry, 2008,108207-214 0304-4203 ISI:000253332400007 http://dspace.xmu.edu.cn/handle/2288/60448 http://dx.doi.org/10.1016/j.marchem.2007.11.012 DISSOLVED ORGANIC-MATTER HYDROGEN-PEROXIDE PHOTOCHEMICAL PRODUCTION MASS SPECTROMETRY ANTARCTIC WATERS FRESH-WATER MARINE MERCURY LEAD EUTROPHICATION Article 2008 ftxiamenuniv 2020-07-21T11:32:08Z The marine microalga Dunaliella salina was used as a model organism in this study. Hydroxyl radicals ((OH)-O-center dot) were determined using HPLC with sodium benzoate as a probe, and the photochemical activity of marine alga in the formation of (OH)-O-center dot was confirmed for the first time. Coastal organisms are often exposed to both metal pollution and macronutrient enrichment, and so the effects of algal concentration, exposure time, macronutrient (nitrate and phosphate) additions and metal pollution (5.0 mu g/L Pb(II) and 0.1 mu g/L methytmercury) on the photoproduction of (OH)-O-center dot were examined. Photoproduction was increased with increasing algal concentration and with exposure time. It could be increased greatly, with or without the presence of D. salina, by the addition of Pb(II), or Pb(II) and methylmercury, but was decreased by the addition of methylmercury only. Photoproduction of (OH)-O-center dot was positively correlated with the amount of basic functional groups on the cell's surface and also with the chlorophyll a content per cell. The influence of macronutrient additions on the photoproduction of (OH)-O-center dot resulted from the photolysis of nitrate and their effects on the photochemical activity of D. salina. (C) 2008 Elsevier B.V. All rights reserved. Article in Journal/Newspaper Antarc* Antarctic Xiamen University Institutional Repository Antarctic |
institution |
Open Polar |
collection |
Xiamen University Institutional Repository |
op_collection_id |
ftxiamenuniv |
language |
English |
topic |
DISSOLVED ORGANIC-MATTER HYDROGEN-PEROXIDE PHOTOCHEMICAL PRODUCTION MASS SPECTROMETRY ANTARCTIC WATERS FRESH-WATER MARINE MERCURY LEAD EUTROPHICATION |
spellingShingle |
DISSOLVED ORGANIC-MATTER HYDROGEN-PEROXIDE PHOTOCHEMICAL PRODUCTION MASS SPECTROMETRY ANTARCTIC WATERS FRESH-WATER MARINE MERCURY LEAD EUTROPHICATION Li, S. X. Hong, H. S. Zheng, F. Y. Deng, N. S. 洪华生 Effects of metal pollution and macronutrient enrichment on the photoproduction of hydroxyl radicals in seawater by the alga Dunaliella salina |
topic_facet |
DISSOLVED ORGANIC-MATTER HYDROGEN-PEROXIDE PHOTOCHEMICAL PRODUCTION MASS SPECTROMETRY ANTARCTIC WATERS FRESH-WATER MARINE MERCURY LEAD EUTROPHICATION |
description |
The marine microalga Dunaliella salina was used as a model organism in this study. Hydroxyl radicals ((OH)-O-center dot) were determined using HPLC with sodium benzoate as a probe, and the photochemical activity of marine alga in the formation of (OH)-O-center dot was confirmed for the first time. Coastal organisms are often exposed to both metal pollution and macronutrient enrichment, and so the effects of algal concentration, exposure time, macronutrient (nitrate and phosphate) additions and metal pollution (5.0 mu g/L Pb(II) and 0.1 mu g/L methytmercury) on the photoproduction of (OH)-O-center dot were examined. Photoproduction was increased with increasing algal concentration and with exposure time. It could be increased greatly, with or without the presence of D. salina, by the addition of Pb(II), or Pb(II) and methylmercury, but was decreased by the addition of methylmercury only. Photoproduction of (OH)-O-center dot was positively correlated with the amount of basic functional groups on the cell's surface and also with the chlorophyll a content per cell. The influence of macronutrient additions on the photoproduction of (OH)-O-center dot resulted from the photolysis of nitrate and their effects on the photochemical activity of D. salina. (C) 2008 Elsevier B.V. All rights reserved. |
format |
Article in Journal/Newspaper |
author |
Li, S. X. Hong, H. S. Zheng, F. Y. Deng, N. S. 洪华生 |
author_facet |
Li, S. X. Hong, H. S. Zheng, F. Y. Deng, N. S. 洪华生 |
author_sort |
Li, S. X. |
title |
Effects of metal pollution and macronutrient enrichment on the photoproduction of hydroxyl radicals in seawater by the alga Dunaliella salina |
title_short |
Effects of metal pollution and macronutrient enrichment on the photoproduction of hydroxyl radicals in seawater by the alga Dunaliella salina |
title_full |
Effects of metal pollution and macronutrient enrichment on the photoproduction of hydroxyl radicals in seawater by the alga Dunaliella salina |
title_fullStr |
Effects of metal pollution and macronutrient enrichment on the photoproduction of hydroxyl radicals in seawater by the alga Dunaliella salina |
title_full_unstemmed |
Effects of metal pollution and macronutrient enrichment on the photoproduction of hydroxyl radicals in seawater by the alga Dunaliella salina |
title_sort |
effects of metal pollution and macronutrient enrichment on the photoproduction of hydroxyl radicals in seawater by the alga dunaliella salina |
publishDate |
2008 |
url |
http://dspace.xmu.edu.cn/handle/2288/60448 |
geographic |
Antarctic |
geographic_facet |
Antarctic |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_source |
http://dx.doi.org/10.1016/j.marchem.2007.11.012 |
op_relation |
Marine Chemistry, 2008,108207-214 0304-4203 ISI:000253332400007 http://dspace.xmu.edu.cn/handle/2288/60448 |
_version_ |
1766275335529168896 |