naa a22 4500 510752705 CHVBK 20180411083110.0 cr unu---uuuuu 180411e20131101xx s 000 0 eng 10.1007/s11270-013-1764-1 doi (NATIONALLICENCE)springer-10.1007/s11270-013-1764-1 Application of WASP for Modelling and Management of Naphthenic Acids along Athabasca River, Alberta, Canada [Elektronische Daten] [Prakash Kannel, Thian Gan] This study investigates the potential impact of OSPW (oil sands processed water) in terms of naphthenic acids (NAs) in the event that OSPW which contain NAs were discharged to a stretch of the Athabasca River of Alberta, Canada. A one-dimensional model WASP7 (water quality analysis simulation programme) was hydro-dynamically calibrated and validated for the data 1999-2008. The model represented the field data quite well except frozen seasons. The sensitivity analysis showed that the concentrations of NAs in the Athabasca River due to OSPW discharged to the river will be most sensitive to changes in the discharge rate of OSPW and concentrations of NAs in the OSPW. The WASP7 was applied to investigate how to achieve acceptable concentrations of NAs (≤0.15mg/L) along the river, assuming NAs are degraded by natural dilution, biodegradation, sorption, photodegradation or combinations of these processes. If only the dilution effect is considered for an OSPW discharged at 1.5, 3.0 and 4.5m3/s (initial NAs concentration of 120mg/L) to the river, respectively, all the NAs concentrations simulated would exceed an allowable limit of ≤0.15mg/L, which indicates that dilution effect alone is not sufficient to decrease the concentration of NAs in the river. Similarly, by only considering a photodegradation rate of 0.005/day, the concentrations of NAs would decrease by approximately 0.1-3%. However, by only considering a maximum biodegradation rate of 0.4/day, NAs discharged to the river can be decreased by 5-90%. If a more moderate biodegradation rate of 0.2/day is assumed but photodegradation is also considered at 0.0025/day, then for the same three discharge rates of OSPW to the river, the allowable OSPW NAs have to be limited to 8.02, 4.09 and 2.77mg/L to limit NAs at 0.15mg/L. This implies that high biodegradation itself is more effective than a combination of moderate biodegradation and photodegradation in degrading NAs. Through multiple numerical experiments with WASP7, it seems that to limit the concentrations of the final NAs in the Athabasca River within 0.15mg/L, it will be crucial to limit the OSPW NAs and the OSPW discharge rate to the river. Springer Science+Business Media Dordrecht, 2013 Naphthenic acids nationallicence Oil sand processed water nationallicence Biodegradation nationallicence Photodegradation nationallicence Dilution nationallicence Sorption nationallicence WASP7 nationallicence Kannel Prakash Department of Civil and Environmental Engineering, University of Alberta, 9105-116th Street NW, T6G2W2, Edmonton, AB, Canada aut Gan Thian Department of Civil and Environmental Engineering, University of Alberta, 9105-116th Street NW, T6G2W2, Edmonton, AB, Canada aut Water, Air, & Soil Pollution Springer Netherlands 224/11(2013-11-01), 1-16 0049-6979 224:11<1 2013 224 11270 https://doi.org/10.1007/s11270-013-1764-1 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11270-013-1764-1 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Kannel Prakash Department of Civil and Environmental Engineering, University of Alberta, 9105-116th Street NW, T6G2W2, Edmonton, AB, Canada aut NATIONALLICENCE 700 1- Gan Thian Department of Civil and Environmental Engineering, University of Alberta, 9105-116th Street NW, T6G2W2, Edmonton, AB, Canada aut NATIONALLICENCE 773 0- Water, Air, & Soil Pollution Springer Netherlands 224/11(2013-11-01), 1-16 0049-6979 224:11<1 2013 224 11270 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer