Production of dissolved organic carbon (DOC) and trihalomethane (THM) precursor from peat soils

Chow, Alex T.; Tanji, Kenneth K.; Gao, Suduan

doi:10.1016/s0043-1354(03)00437-8

Cited by 95 publications

(81 citation statements)

References 15 publications

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“…Water colour is correlated with DOC, so as DOC increases water colour will be increasingly brown. Whilst colour per se is not a public health issue, the chlorination processes at water treatment plants generate by-products, such as trihalomethanes, which are carcinogens (Chow et al, 2003). DOC modelling by Futter et al, (2007) suggests that warmer, wetter climates could lead to higher levels of surface water DOC, but there remain large uncertainties due to the complex dynamics and biochemical processes controlling soil carbon flux.…”

Section: Acidification and Doc In The Uplandsmentioning

confidence: 99%

A review of the potential impacts of climate change on surface water quality

Whitehead

Wilby

Battarbee

et al. 2009

Hydrological Sciences Journal

997

561

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It is now accepted that some human-induced climate change is unavoidable. Potential impacts on water supply have received much attention, but relatively little is known about the concomitant changes in water quality. Projected changes in air temperature and rainfall could affect river flows and, hence, the mobility and dilution of contaminants. Increased water temperatures will affect chemical reaction kinetics and, combined with deteriorations in quality, freshwater ecological status. With increased flows there will be changes in stream power and, hence, sediment loads with the potential to alter the morphology of rivers and the transfer of sediments to lakes, thereby impacting freshwater habitats in both lake and stream systems. This paper reviews such impacts through the lens of UK surface water quality. Widely accepted climate change scenarios suggest more frequent droughts in summer, as well as flash-flooding, leading to uncontrolled discharges from urban areas to receiving water courses and estuaries. Invasion by alien species is highly likely, as is migration of species within the UK adapting to changing temperatures and flow regimes. Lower flows, reduced velocities and, hence, higher water residence times in rivers and lakes will enhance the potential for toxic algal blooms and reduce dissolved oxygen levels. Upland streams could experience increased dissolved organic carbon and colour levels, requiring action at water treatment plants to prevent toxic by-products entering public water supplies. Storms that terminate drought periods will flush nutrients from urban and rural areas or generate acid pulses in acidified upland catchments. Policy responses to climate change, such as the growth of bio-fuels or emission controls, will further impact freshwater quality.Key words climate change; water quality; rivers; catchments; lakes; estuaries; ecology; hydrochemistry Une revue des impacts potentiels du changement climatique sur la qualité des eaux de surface Résumé Il est maintenant admis qu'un certain changement climatique d'origine anthropique est inévitable. Les impacts potentiels sur l'alimentation en eau ont fait l'objet de nombreuses attentions, mais peu de connaissances sont disponibles sur les changements associés en termes de qualité de l'eau. Les changements prévus en termes de température de l'air et de précipitations pourraient affecter les écoulements des rivières et par conséquent la mobilité et la dilution des substances polluantes. Une augmentation des températures de l'eau affectera la cinétique des réactions chimiques et, par combinaison avec les dégradations de la qualité, l'état écologique des hydrosystèmes. Une augmentation des écoulements aura pour conséquences des changements dans la puissance des cours d'eau et donc aussi des charges sédimentaires qui pourront altérer la morphologie des rivières et le transfert de sédiments vers les lacs, ce qui aura des impacts sur les habitats hydrobiologiques dans les systèmes lacustres et fluviatiles. Cet article fait une revue de tels imp...

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Section: Acidification and Doc In The Uplandsmentioning

confidence: 99%

A review of the potential impacts of climate change on surface water quality

Whitehead

Wilby

Battarbee

et al. 2009

Hydrological Sciences Journal

997

561

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“…Dissolved organic carbon (DOC) may play an important role in the carbon cycle of peatlands and beyond: DOC losses may form an important part of the carbon balance (Dinsmore et al, 2010;Rowson et al, 2010), act as a transport vector for organically bound substances (Rothwell et al, 2007) and influence biogeochemical cycling in and drinking water quality of the receiving water bodies (Chow et al, 2003). While the governing processes and influence factors for nitrate are quite well known, the effects of drainage and re-wetting on DOC and dissolved organic nitrogen (DON) losses are less clear.…”

Section: Introductionmentioning

confidence: 99%

Nitrogen and dissolved organic carbon (DOC) losses from an artificially drained grassland on organic soils

Tiemeyer¹,

Kahle

2014

Biogeosciences

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Abstract. -N) as well as dissolved organic carbon (DOC) and nitrogen (DON) concentrations and losses were studied for three and two years, respectively, in a small catchment dominated by a degraded peatland used as intensive grassland. Concentrations in the shallow groundwater were spatially and temporally very variable, with NO 3 -N being the most dynamic component . Ditch DOC concentration were lower than the groundwater DOC concentration of 50.6 ± 15.2 mg L −1 (14.9 to 88.5 mg L −1 ). Both DOC and N concentrations were governed by hydrological conditions, but NO 3 -N reacted much faster and clearer on rising discharge rates than DOC, which tended to be higher under drier conditions. In the third year of the study, the superposition of a very wet summer and land use changes from grassland to arable land in a part of the catchment suggests that, under re-wetting conditions with a high groundwater table in summer, NO 3 -N would diminish quickly, while DOC would remain on a similar level. Further intensification of the land use, on the other hand, would increase N losses to receiving water bodies.

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“…It attenuates UV radiation 1 , influences the functioning of aquatic ecosystems 2 , impacts 45 on water treatment costs 3 , and has implications for human health in potable water due to its 46 role as a precursor of disinfectant by-products 4 . Large increases in DOC concentrations have 47 been observed in surface waters draining semi-natural ecosystems across many areas of 48 analytical equipment.…”

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confidence: 99%