Water treatment technologies for the remediation of naphthenic acids in oil sands process-affected water

Quinlan, Patrick; Tam, Kam Chiu

doi:10.1016/j.cej.2015.05.062

Cited by 84 publications

(31 citation statements)

References 105 publications

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“…Further, the equilibrium adsorption capacity was observed to decay exponentially from 179.4 to 37.9 mg/g as the concentration of NaCl was increased from 0 to 40 mmol/L. This drastic reduction in performance would certainly require consideration when implementing QCHA as NA adsorbents from OSPW due to the high concentration of monovalent and divalent salts …”

Section: Resultsmentioning

confidence: 99%

“…Among the many contaminants present in OSPW, a very diverse group of organic carboxylates, collectively recognized as naphthenic acids (NAs), have been identified as being the most acutely toxic . NAs are typically present in OSPW in concentrations ranging from 40–70 mg/L . NAs require a considerably long period of time for complete degradation and are also well‐known contributors to the corrosion of process equipment .…”

Section: Introductionmentioning

confidence: 99%

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Removal of 2‐naphthoxyacetic acid from aqueous solution using quaternized chitosan beads

2016

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The present study investigates the use of quaternized chitosan hydrogels for the adsorption of an aromatic organic carboxylate, 2‐naphthoxyacetic acid (2‐NAA), to demonstrate the applicability of this type of adsorbent towards the removal of naphthenic acids (NAs) from oil sands process‐affected water (OSPW). The effects of varying three processing parameters on the physical and adsorption characteristics of the resulting adsorbents were investigated, namely the density, degree of cross‐linking, and degree of quaternization of the hydrogel beads. Their effects on the swelling behaviour and Langmuir adsorption capacity of 2‐NAA were reported. The Langmuir adsorption isotherm provided adequate fit for the equilibrium adsorption data (R2 ≥ 0.99), while the pseudo second order rate equation described the kinetic adsorption data quite well (R2 ≥ 0.95). The effects of adsorbate concentration, adsorbent dosage, agitation rate, ionic strength, pH, and temperature on the adsorption process were also studied. At the initial concentration of approximately 200 mg/L, up to 91 % of 2‐NAA was adsorbed. The best quaternized chitosan hydrogel adsorbents reported in this study possessed a maximum adsorption capacity of 315 mg/g.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Removal of 2‐naphthoxyacetic acid from aqueous solution using quaternized chitosan beads

2016

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“…Some components of OSPW are well understood: trace elements including metals, semimetals, and metalloids (Nix and Martin ; Siwik et al ; Bicalho et al ; Donner et al ), salts and ammonia (COSIA ), and suspended solids (El‐Din et al ; COSIA ; McQueen, Hendrikse et al ). However, the complexity of the organics in OSPW creates a practical challenge for determining treatment methods (Headley et al ; Pereira et al 2013; Goff et al ; Brown and Ulrich ; Quinlan and Tam ; Wilde et al ; Ajaero et al ), in addition to estimating potential risks (West et al ; Huang et al ). The estimation of potential risk is further supported through an existing understanding of chemical properties such as the propensity for bioaccumulation (Zhang et al ; Morandi et al ).…”

Section: Workhop Frameworkmentioning

confidence: 99%

Overview of Existing Science to Inform Oil Sands Process Water Release: A Technical Workshop Summary

Tanna¹,

Redman

Frank

et al. 2019

Integr Envir Assess & Manag

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The extraction of oil sands from mining operations in the Athabasca Oil Sands Region uses an alkaline hot water extraction process. The oil sands process water (OSPW) is recycled to facilitate material transport (e.g., ore and tailings), process cooling, and is also reused in the extraction process. The industry has expanded since commercial mining began in 1967 and companies have been accumulating increasing inventories of OSPW. Short‐ and long‐term sustainable water management practices require the ability to return treated water to the environment. The safe release of OSPW needs to be based on sound science and engineering practices to ensure downstream protection of ecological and human health. A significant body of research has contributed to the understanding of the chemistry and toxicity of OSPW. A multistakeholder science workshop was held in September 2017 to summarize the state of science on the toxicity and chemistry of OSPW. The goal of the workshop was to review completed research in the areas of toxicology, chemical analysis, and monitoring to support the release of treated oil sands water. A key outcome from the workshop was identifying research needs to inform future water management practices required to support OSPW return. Another key outcome of the workshop was the recognition that methods are sufficiently developed to characterize chemical and toxicological characteristics of OSPW to address and close knowledge gaps. Industry, government, and local indigenous stakeholders have proceeded to utilize these insights in reviewing policy and regulations. Integr Environ Assess Manag 2019;15:519–527. © 2019 SETAC

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“…The proper handling of these large volumes of OSPW is a major challenge for the oil sands industry. To remove OAs from OSPW, several methods have been studied, including biodegradation, catalytic decarboxylation (using Ag 2 O), membrane separation, and ozonation (Azad et al, 2013;Gamal El-Din et al, 2011;Iranmanesh et al, 2014;Quinlan and Tam, 2015;Scarlett et al, 2012, Zhang et al, 2006. These methods are effective in removal of OAs from wastewater, but are considered to be expensive, so their use is generally limited (Iranmanesh et al, 2014;Scott et al, 2008).…”

Section: Introductionmentioning

confidence: 99%

Removal of organic acids from water using biochar and petroleum coke

Alam

Cossio

Robinson

et al. 2016

Environmental Technology & Innovation

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Water treatment technologies for the remediation of naphthenic acids in oil sands process-affected water

Cited by 84 publications

References 105 publications

Removal of 2‐naphthoxyacetic acid from aqueous solution using quaternized chitosan beads

Removal of 2‐naphthoxyacetic acid from aqueous solution using quaternized chitosan beads

Overview of Existing Science to Inform Oil Sands Process Water Release: A Technical Workshop Summary

Removal of organic acids from water using biochar and petroleum coke

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