Factors Affecting the Distribution of H<sub>2</sub>O<sub>2</sub> in Surface Waters

Cooper, William J.; Shao, Chihwen; Lean, D. R. S.; Gordon, Andrew S.; Scully, Frank E.

doi:10.1021/ba-1994-0237.ch012

Cited by 66 publications

(100 citation statements)

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“…Loss of H 2 O 2 and MHP followed first-order kinetics with half-lives of 120 and 45 min, respectively, at 24 8C in Chesapeake Bay surface waters with a salinity of 17.8x. Our observed H 2 O 2 half-life in unfiltered Chesapeake Bay surface waters is in good agreement with determinations by Cooper et al (1994). For Bay waters, t 1/2 ranged from 2.49 to 12.2 h. The latter is similar to the 12.6 h half-life for unfiltered Vineyard sound surface waters observed by Moffett and Zafiriou (1990).…”

Section: Sample Stability Studiessupporting

confidence: 89%

“…Decay of hydrogen peroxide in natural waters has been shown to follow first-order kinetics in freshwater and seawater (Cooper et al, 1994;Petasne and Zika, 1997). Peroxide decay occurs through a number of biologically mediated and chemically mediated pathways.…”

Section: Sample Stability Studiesmentioning

confidence: 99%

“…Peroxide decay occurs through a number of biologically mediated and chemically mediated pathways. In natural waters, particlemediated decay dominates the removal of hydrogen peroxide (Cooper et al, 1994). The stability of peroxides in unfiltered surface waters was examined by determining peroxide loss rates in a brown acidcleaned NalgeneR bottle.…”

Section: Sample Stability Studiesmentioning

confidence: 99%

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Photochemical production of hydrogen peroxide and methylhydroperoxide in coastal waters

et al. 2005

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Section: Sample Stability Studiessupporting

confidence: 89%

Section: Sample Stability Studiesmentioning

confidence: 99%

Section: Sample Stability Studiesmentioning

confidence: 99%

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Photochemical production of hydrogen peroxide and methylhydroperoxide in coastal waters

et al. 2005

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“…The importance of UVBR in the production of H 2 O 2 is evident, confirming the results of Cooper et al (1994). This radiation is 227 times more efficient for the production of H 2 O 2 than VIS and 35 times more efficient than UVAR (Table 1).…”

Section: Deck Incubationssupporting

confidence: 80%

“…It was assumed that the relation between H 2 O 2 production and light intensity is linear (Cooper et al, 1994). It was assumed that the increase in peroxide concentration C at time t x + 1 was due to the energy of the incoming light E between t x and t x + 1 multiplied by a factor L, according to:…”

Section: Deck Incubationsmentioning

confidence: 99%

The influence of solar ultraviolet radiation on the photochemical production of H2O2 in the equatorial Atlantic Ocean

Gerringa

Rijkenberg

Timmermans

et al. 2004

Journal of Sea Research

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Hydrogen peroxide (H 2 O 2 ) was measured in marine surface waters of the eastern Atlantic Ocean between 25jN and 25jS. H 2 O 2 concentrations decreased from 80 nM in the north to 20 nM in the south, in agreement with earlier observations. A diel cycle of H 2 O 2 production as a function of sunlight in surface waters was followed twice whilst the ship steamed southward. Around 23jN a distinct diel cycle could be measured which correlated well with irradiance conditions. The wavelength dependency of H 2 O 2 formation was studied near the equator. For 16 hours, water samples were incubated with wavelength bands of the solar spectrum, i.e. visible (VIS: 400 -700 nm), VIS and ultraviolet A radiation (UVAR: 320 -400 nm) and VIS, UVAR and ultraviolet B radiation (UVBR: 280 -320 nm). A significant relationship was found between wavelength band and the production of H 2 O 2 . In addition, a clear positive relationship between intensity and production was found. UVAR was 6.5 times more efficient than VIS in producing 1 nM of H 2 O 2 , whereas UVBR was 228 times more efficient than VIS. When these data were weighted with respect to the energy of the solar spectrum at zenith hour, 28% of the H 2 O 2 was formed by VIS, 23% was formed by UVAR and 48% was formed by UVBR. Considering the strong attenuation of UVBR in marine waters as compared with UVAR and VIS radiation, the role of UVAR deeper in the water column is recognised. Furthermore results of this research emphasise the importance of VIS radiation in the formation of H 2 O 2 .

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Widespread Effects of Climatic Warming on Freshwater Ecosystems in North America

1997

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Freshwaters in dierent regions show many similarities and dierences in their responses to climatic warming. Bases for comparison include reports from regional committees, long-term records for several sites where climate has warmed in the past two decades and other human alterations to freshwaters that simulate some of the expected results of climatic warming, such as reservoir construction. Palaeoecological studies of freshwaters under climatic warming and dierences in communities under dierent climatic regimes are also considered. Major changes in the physical, chemical and biological characteristics of lakes occur. Many of the changes to lakes and streams are the result of strong eects of climatic warming on terrestrial catchments. Inputs from catchments can be either dampened or ampli®ed by in-lake processes, in some cases causing counter-intuitive responses, such as the acidi®cation of streams but alkalinization of lakes in areas where supplies of base cations are limited. Consideration of land±water interactions and interactions between climatic warming and other human stresses are important for the accurate prediction of the eects of climatic change.

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Factors Affecting the Distribution of H₂O₂ in Surface Waters

Cited by 66 publications

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Photochemical production of hydrogen peroxide and methylhydroperoxide in coastal waters

Photochemical production of hydrogen peroxide and methylhydroperoxide in coastal waters

The influence of solar ultraviolet radiation on the photochemical production of H2O2 in the equatorial Atlantic Ocean

Widespread Effects of Climatic Warming on Freshwater Ecosystems in North America

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Factors Affecting the Distribution of H2O2 in Surface Waters

Cited by 66 publications

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Photochemical production of hydrogen peroxide and methylhydroperoxide in coastal waters

Photochemical production of hydrogen peroxide and methylhydroperoxide in coastal waters

The influence of solar ultraviolet radiation on the photochemical production of H2O2 in the equatorial Atlantic Ocean

Widespread Effects of Climatic Warming on Freshwater Ecosystems in North America

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Factors Affecting the Distribution of H₂O₂ in Surface Waters