Assessing the role of different dissolved organic carbon and bromide concentrations for disinfection by-product formation using chemical analysis and bioanalysis

2019 ◽  
Vol 26 (17) ◽  
pp. 17100-17109 ◽  
Author(s):  
Peta A. Neale ◽  
Frederic D. L. Leusch
Keyword(s):  
Organic Carbon ◽  
Chemical Analysis ◽  
Dissolved Organic Carbon ◽  
Product Formation

scholarly journals Organotin pollution from pleasure craft at Paraty, a tourist area of Southeastern Brazil: amelioration or interference?

2013 ◽  
Vol 61 (3) ◽  
pp. 177-186 ◽  
Author(s):  
Camila de Leon Lousada Borges ◽  
Marcos Antonio dos Santos Fernandez ◽  
Ítalo Braga Castro ◽  
Gilberto Fillmann
Keyword(s):  
Organic Carbon ◽  
Chemical Analysis ◽  
Dissolved Organic Carbon ◽  
Endocrine Disruptors ◽  
Marine Ecosystems ◽  
Southeastern Brazil ◽  
Reference Sites ◽  
Mangrove Swamp ◽  
Small Vessels ◽  
Stramonita Haemastoma

Some organotin compounds, such as TBT, are endocrine disruptors and harm marine ecosystems. Even after the global ban on organotins, increasing imposex levels have been detected in Stramonita haemastoma analyzed in 2004 and 2011 in some locations at Paraty, a tourist area in southeastern Brazil. The results of this study indicate that particulate and dissolved organic carbon and xenoestrogens might be interfering in this syndrome's development, leading to underestimation of imposex evaluation. Chemical analysis of three mangrove swamp sediments in the area showed the presence of TBT (16.0 - 205.7 ng Sn g-1), DBT (10.1 - 16.4 ng Sn g-1) and MBT (10.1 - 10.2 ng Sn g-1) even at the reference sites. The concentrations of butyltins and the increased incidence of imposexat some stations indicate recent inputs of TBT in the study area due to its illegal use on small vessels.

The Role of Allochthonous Inputs of Dissolved Organic Carbon on the Hypolimnetic Oxygen Content of Reservoirs

Ecosystems ◽  
2008 ◽  
Vol 11 (7) ◽  
pp. 1035-1053 ◽  
Author(s):  
Rafael Marcé ◽  
Enrique Moreno-Ostos ◽  
Pilar López ◽  
Joan Armengol
Keyword(s):  
Organic Carbon ◽  
Dissolved Organic Carbon ◽  
Oxygen Content ◽  
Allochthonous Inputs ◽  
Hypolimnetic Oxygen

Stability and aggregation of silver and titanium dioxide nanoparticles in seawater: Role of salinity and dissolved organic carbon

2014 ◽  
Vol 33 (5) ◽  
pp. 1023-1029 ◽  
Author(s):  
Huanhua Wang ◽  
Robert M. Burgess ◽  
Mark G. Cantwell ◽  
Lisa M. Portis ◽  
Monique M. Perron ◽  
...  
Keyword(s):  
Titanium Dioxide ◽  
Organic Carbon ◽  
Dissolved Organic Carbon ◽  
Titanium Dioxide Nanoparticles

scholarly journals The role of watershed characteristics, permafrost thaw, and wildfire on dissolved organic carbon biodegradability and water chemistry in Arctic headwater streams

2015 ◽  
Vol 12 (5) ◽  
pp. 4021-4056 ◽  
Author(s):  
J. R. Larouche ◽  
B. W. Abbott ◽  
W. B. Bowden ◽  
J. B. Jones
Keyword(s):  
Organic Carbon ◽  
Dissolved Organic Carbon ◽  
Aquatic Ecosystems ◽  
Vegetation Type ◽  
Watershed Scale ◽  
Ecosystem Recovery ◽  
Watershed Characteristics ◽  
Stream Geomorphology ◽  
Tundra Ecosystems

Abstract. In the Alaskan Arctic, rapid climate change is increasing the frequency of disturbance including wildfire and permafrost collapse. These pulse disturbances may influence the delivery of dissolved organic carbon (DOC) to aquatic ecosystems, however the magnitude of these effects compared to the natural background variability of DOC at the watershed scale is not well known. We measured DOC quantity, composition, and biodegradability from 14 river and stream reaches (watershed sizes ranging from 1.5–167 km2) some of which were impacted by permafrost collapse (thermokarst) and fire. We found that region had a significant impact on quantity and biodegradability of DOC, likely driven by landscape and watershed characteristics such as lithology, soil and vegetation type, elevation, and glacial age. However, contrary to our hypothesis, we found that streams disturbed by thermokarst and fire did not contain significantly altered labile DOC fractions compared to adjacent reference waters, potentially due to rapid ecosystem recovery after fire and thermokarst as well as the limited spatial extent of thermokarst. Overall, biodegradable DOC ranged from 4 to 46% and contrary to patterns of DOC biodegradability in large Arctic rivers, seasonal variation in DOC biodegradability showed no clear pattern between sites, potentially related to stream geomorphology and position along the river network. While thermokarst and fire can alter DOC quantity and biodegradability at the scale of the feature, we conclude that tundra ecosystems are resilient to these types of disturbance.

scholarly journals Factors affecting MeHg bioaccumulation in stream biota: the role of dissolved organic carbon and diet

Ecotoxicology ◽  
2019 ◽  
Vol 28 (8) ◽  
pp. 949-963 ◽  
Author(s):  
Hannah J. Broadley ◽  
Kathryn L. Cottingham ◽  
Nicholas A. Baer ◽  
Kathleen C. Weathers ◽  
Holly A. Ewing ◽  
...  
Keyword(s):  
Organic Carbon ◽  
Dissolved Organic Carbon ◽  
Factors Affecting ◽  
Stream Biota
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