Treatment of oil sands process-affected waters using a pilot-scale hybrid constructed wetland

A Light Touch: Solar Photocatalysis Detoxifies Oil Sands Process-Affected Waters Prior to Significant Treatment of Naphthenic Acids

“…In the oil sands, future research should evaluate how buoyant solar photocatalysis can best integrate with existing mine closure plans, such as EPLs and wetlands�in particular, treatment wetlands may be promising to address some of the inorganic challenges in OSPW. 44,156 ■ ASSOCIATED CONTENT * sı Supporting Information…”

“…how buoyant solar photocatalysis can best integrate with existing mine closure plans, such as EPLs and wetlands�in particular, treatment wetlands may be promising to address some of the inorganic challenges in OSPW 44,156. ■ ASSOCIATED CONTENT * sı Supporting InformationThe Supporting Information is available free of charge at https://pubs.acs.org/doi/10.1021/acsestwater.3c00616.Theoretical log K ow predictions, water quality characterization and toxicity of control treatments, estimated partition coefficients for NAFCs (TablesS1−S6), and interactive 3D figures (FiguresS1 and S2) (ZIP) Additional discussions on chemical partitioning modeling; 3D interactive figures of modeled partition coefficient fit to empirical data; figures of LC-MS AEO distributions, sulfoxide FTIR peaks, and toxicological model fit to fathead minnow results; tables of OSPW analytical characterization, model predictions, estimated partition coefficients, and LC-MS formula annotations and feature intensities (PDF) .P., A.B., R.G., H.M., T.W., W.Z., D.J.L., A.D.R., and F.G. declare recent (while engaged in the research project) or present employment by organizations that may gain or lose financially through this publication.…”

Wetlands for wastewater treatment

“…CWs have been considered for mitigation of complex mixtures. Hendrikse et al (2018) studied the performance of pilot-scale hybrid (solar photocatalysis) CW treatment systems (CWTS) for the treatment of oil sand process-affected waters (OSPWs) and measure the rates and extents of COC (constituents of concern), which are removal of naphthenic acids (NAs), oil and grease, As, B, Cu, Pb, and Zn. A 16-day retention time decreased the total NA fraction from 43 mg/L (inflow) to 10 mg/L (outflow) and was able to treat B, Cu, Pb, and Zn on a mass basis, but the performance was masked by evaporative concentration.…”

Evaluating the attenuation of naphthenic acids in constructed wetland mesocosms planted with Carex aquatilis

“…Quantitation across sources and methods must be done sparingly; although NAs in OSPW, can range between 20-120 mg/L, this depends on the source of OSPW (Ajaero et al, 2018;Cancelli & Gobas, 2022;Vander Meulen et al, 2021). Measurement methods must be kept consistent within study designs, as amounts of NAs and NAFCs will also vary between different quanti cation methods, whether using Constructed wetland treatment systems (CWTS) can facilitate the remediation of OSPW by degrading NAFCs through the microbial communities and wetland plants (Cancelli & Gobas, 2020;Hendrikse et al, 2018;. Plants are incorporated into CWTS to directly or indirectly promote microbial activity by increasing aeration and accumulating organic matter (Allen, 2008;Phillips et al, 2010;J.…”

“…Previous successful petroleum bioremediation projects have focused on the potential of wetland graminoids to degrade OSPW in a CWTS (Hendrikse et al, 2018;Simair et al, 2021a). A variety of wetland graminoids (Typha latifolia, Phragmites australis, and Scirpus acutus) were able to selectively enhance the dissipation of nonionized NA compounds, effectively reducing the toxicity of NAs in the system over 30 days (Armstrong et al, 2009).…”