Trends of dissolved organic carbon in surface water treated by innate coagulants

2018 ◽  
Vol 136 ◽  
pp. 226-236 ◽  
Author(s):  
Bhavya Kavitha Dwarapuredd ◽  
Vara Saritha ◽  
N. Srinivas ◽  
Manoj Kumar Karnena
Keyword(s):  
Surface Water ◽  
Organic Carbon ◽  
Dissolved Organic Carbon

scholarly journals Concentration of Total Organic Carbon and Its Fractions in Surface Water in Poland and Germany

Proceedings ◽  
2020 ◽  
Vol 51 (1) ◽  
pp. 35
Author(s):  
Patrycja Sobczak ◽  
Agata Rosińska
Keyword(s):  
Drinking Water ◽  
Surface Water ◽  
Organic Carbon ◽  
Dissolved Organic Carbon ◽  
Total Organic Carbon ◽  
Rhine River ◽  
Bacteriological Quality ◽  
Quality Of Water ◽  
Biodegradable Dissolved Organic Carbon

Total organic carbon (TOC) present in surface water consists of different fractions like dissolved organic carbon (DOC) or biodegradable dissolved organic carbon (BDOC). BDOC may have an impact on the bacteriological quality of water as it can be a source of carbon and energy for microorganisms. It is important to consider this parameter in case of the distribution of drinking water. The aim of this research was to compare the qualities of chosen surface water in Poland and Germany in terms of concentration of total organic carbon and its fractions. The samples were taken from the reservoir in Poland and Rhine River in Germany. The first one is a source of drinking water for humans. The research showed that, considering the analyzed compounds, the water from the river has better quality.

Aggregation capability of a fluidised layer of granular material during treatment of water with high DOC and low alkalinity

2008 ◽  
Vol 8 (1) ◽  
pp. 9-17 ◽  
Author(s):  
M. Pivokonsky ◽  
L. Pivokonska ◽  
H. Tomaskova
Keyword(s):  
Surface Water ◽  
Organic Carbon ◽  
Dissolved Organic Carbon ◽  
Granular Material ◽  
Pilot Plant ◽  
Aggregation Processes

The aim of this contribution is to investigate aggregation efficiencies when a fluidised layer of granular material (FLGM) is applied for a treatment of surface water with high DOC (Dissolved Organic Carbon) and low alkalinity in a pilot size operation. It was shown that the FLGM can be effective for agitation of a system using destabilised particles with the aim to form readily separable suspension. An aggregation efficiency of the FLGM reactor was evaluated by the degrees of destabilisation and aggregation of the particles of impurities. The maximal separation efficiencies of the pilot plant after filtration attained φAl = 0.96 and φDOC = 0.73. These values exceeded not negligibly the ones reported for the conventional aggregation processes.

scholarly journals Modelling the effects of climate on long-term patterns of dissolved organic carbon concentrations in the surface waters of a boreal catchment

2008 ◽  
Vol 12 (2) ◽  
pp. 437-447 ◽  
Author(s):  
M. N. Futter ◽  
M. Starr ◽  
M. Forsius ◽  
M. Holmberg
Keyword(s):  
Surface Water ◽  
Organic Carbon ◽  
Dissolved Organic Carbon ◽  
Surface Waters ◽  
Organic Soils ◽  
Catchment Scale ◽  
Changing Climate ◽  
Recovery From Acidification ◽  
Carbon Concentrations ◽  
Process Based Models

Abstract. Dissolved organic carbon concentrations ([DOC]) in surface waters are increasing in many regions of Europe and North America. These increases are likely driven by a combination of changing climate, recovery from acidification and change in severity of winter storms in coastal areas. INCA-C, a process-based model of climate effects on surface water [DOC], was used to explore the mechanisms by which changing climate controls seasonal to inter-annual patterns of [DOC] in the lake and outflow stream of a small Finnish catchment between 1990 and 2003. Both production in the catchment and mineralization in the lake controlled [DOC] in the lake. Concentrations in the catchment outflow were controlled by rates of DOC production in the surrounding organic soils. The INCA-C simulation results were compared to those obtained using artificial neural networks (ANN). In general, "black box" ANN models provide better fits to observed data but process-based models can identify the mechanism responsible for the observed pattern. A statistically significant increase was observed in both INCA-C modelled and measured annual average [DOC] in the lake. This suggests that some of the observed increase in surface water [DOC] is caused by climate-related processes operating in the lake and catchment. However, a full understanding of surface water [DOC] dynamics can only come from catchment-scale process-based models linking the effects of changing climate and deposition on aquatic and terrestrial environments.

THE COMPOSITION OF CYCLOPOID ASSEMBLAGES IN ECOLOGICALLY DIFFERENT GROUNDWATER HABITATS OF A DANUBE RIVERINE WETLAND IN AUSTRIA

Crustaceana ◽  
1999 ◽  
Vol 72 (8) ◽  
pp. 883-892 ◽  
Author(s):  
Peter Pospisil
Keyword(s):  
Species Richness ◽  
Surface Water ◽  
Low Temperature ◽  
Organic Carbon ◽  
Dissolved Organic Carbon ◽  
Surface Waters ◽  
Groundwater Monitoring ◽  
Temperature Fluctuations ◽  
Strong Surface ◽  
Riverine Wetland

AbstractThe cyclopoid assemblages of three groundwater monitoring sites in the Danube wetlands were investigated from mid 1996 to end 1997. One of these sites, located 200 m from surface waters, represents a stable, oligotrophic habitat (characterized by low temperature fluctuations and low dissolved organic carbon (DOC)-values). Six groundwater cyclopoids permanently inhabit this habitat. At two other sites, located closely to a backwater of the Danube and characterized by strong surface water influences, only four stygobitic cyclopoids occur altogether. These data support modern opinions, which stress that groundwater habitats are more heterogeneous and display higher biodiversity (i. e., higher species richness) of selected crustacean taxocoenoses (in this case, Cyclopoida) than expected earlier. Die Grundwassercyclopiden dreier Untersuchungsstellen in den Donauauen wurden von Juni 1996 bis Dezember 1997 untersucht. Eine dieser Stellen reprasentierte ein stabiles, oligotrophes Habitat (charakterisiert durch geringe Temperaturschwankungen und niedrige ''dissolved organic carbon'' (DOC)-Werte). Dieses Habitat wurde von sechs Grundwassercyclopiden standig besiedelt, im Vergleich zu nur vier Arten an den beiden anderen Stellen zusammen, die durch das nahe Oberflachengewasser stark beeinflusst wurden. Diese Beobachtungen bestatigen die moderne Ansicht, dass im Grundwasser eine grossere Habitatdiversitat sowie eine grossere Biodiversitat (d. h., Artenreichtum) von ausgewahlten Crustaceen-Taxozonosen (in diesem Fall Cyclopoida) zu finden ist als bisher angenommen.

scholarly journals Increasing Dissolved Organic Carbon Redefines the Extent of Surface Water Acidification and Helps Resolve a Classic Controversy

BioScience ◽  
2011 ◽  
Vol 61 (8) ◽  
pp. 614-618 ◽  
Author(s):  
Martin Erlandsson ◽  
Neil Cory ◽  
Jens Fölster ◽  
Stephan Köhler ◽  
Hjalmar Laudon ◽  
...  
Keyword(s):  
Surface Water ◽  
Organic Carbon ◽  
Dissolved Organic Carbon ◽  
Water Acidification ◽  
Surface Water Acidification

Responses of dissolved organic carbon and dissolved nitrogen in surface water and soil to CO2 enrichment in paddy field

2011 ◽  
Vol 140 (1-2) ◽  
pp. 273-279 ◽  
Author(s):  
Jia Guo ◽  
Mingqian Zhang ◽  
Li Zhang ◽  
Aixing Deng ◽  
Xinmin Bian ◽  
...  
Keyword(s):  
Surface Water ◽  
Organic Carbon ◽  
Dissolved Organic Carbon ◽  
Paddy Field ◽  
Co2 Enrichment ◽  
Dissolved Nitrogen

scholarly journals Local‐ and landscape‐scale impacts of clear‐cuts and climate change on surface water dissolved organic carbon in boreal forests

2015 ◽  
Vol 120 (11) ◽  
pp. 2402-2426 ◽  
Author(s):  
Stephen K. Oni ◽  
Tejshree Tiwari ◽  
José L. J. Ledesma ◽  
Anneli M. Ågren ◽  
Claudia Teutschbein ◽  
...  
Keyword(s):  
Climate Change ◽  
Surface Water ◽  
Organic Carbon ◽  
Dissolved Organic Carbon ◽  
Boreal Forests ◽  
Landscape Scale
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