{"title":"Depletion rates of O2-naphthenic acids from oil sands process-affected water in wetland microcosms†","authors":"Alexander M. Cancelli and Frank A. P. C. Gobas","doi":"10.1039/D4EM00227J","DOIUrl":null,"url":null,"abstract":"<p >Treatment wetland microcosms were constructed to evaluate the fate of O<small><sub>2</sub></small>-naphthenic acids in microcosm reactors containing OSPW only (<em>i.e.</em>, natural attenuation), OSPW with peat soil (sorption and microbial degradation), and cattail microcosm reactors (plant-mediated uptake and biotransformation). Depletion in OSPW occurs by mechanisms of natural attenuation, sorption and microbial degradation, and plant-mediated uptake and biotransformation. The average rate of depletion for O<small><sub>2</sub></small>-naphthenic acids was 0.005 (SD 0.010) per day in OSPW only, 0.029 (SD 0.013) per day in OSPW with peat soil, and 0.043 (SD 0.013) per day in cattail microcosm reactors. Slow rates of depletion from OSPW by natural attenuation highlight the need to develop effective remediation strategies for OSPW, and the increase in rates of depletion for cattail microcosm reactors highlights the importance of wetland vegetation in supporting naphthenic acid removal from OSPW. Reactors containing OSPW with peat soil showed the greatest increase in rates of O<small><sub>2</sub></small>-naphthenic acid depletion for lower molecular weight congeners compared to reactors with OSPW only. Cattail microcosm reactors showed the greatest increase in the rates of O<small><sub>2</sub></small>-naphthenic acid depletion for higher molecular weight congeners compared to reactors with OSPW and peat soil.</p>","PeriodicalId":74,"journal":{"name":"Environmental Science: Processes & Impacts","volume":" 10","pages":" 1859-1867"},"PeriodicalIF":4.3000,"publicationDate":"2024-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Environmental Science: Processes & Impacts","FirstCategoryId":"93","ListUrlMain":"https://pubs.rsc.org/en/content/articlelanding/2024/em/d4em00227j","RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CHEMISTRY, ANALYTICAL","Score":null,"Total":0}
引用次数: 0
Abstract
Treatment wetland microcosms were constructed to evaluate the fate of O2-naphthenic acids in microcosm reactors containing OSPW only (i.e., natural attenuation), OSPW with peat soil (sorption and microbial degradation), and cattail microcosm reactors (plant-mediated uptake and biotransformation). Depletion in OSPW occurs by mechanisms of natural attenuation, sorption and microbial degradation, and plant-mediated uptake and biotransformation. The average rate of depletion for O2-naphthenic acids was 0.005 (SD 0.010) per day in OSPW only, 0.029 (SD 0.013) per day in OSPW with peat soil, and 0.043 (SD 0.013) per day in cattail microcosm reactors. Slow rates of depletion from OSPW by natural attenuation highlight the need to develop effective remediation strategies for OSPW, and the increase in rates of depletion for cattail microcosm reactors highlights the importance of wetland vegetation in supporting naphthenic acid removal from OSPW. Reactors containing OSPW with peat soil showed the greatest increase in rates of O2-naphthenic acid depletion for lower molecular weight congeners compared to reactors with OSPW only. Cattail microcosm reactors showed the greatest increase in the rates of O2-naphthenic acid depletion for higher molecular weight congeners compared to reactors with OSPW and peat soil.
期刊介绍:
Environmental Science: Processes & Impacts publishes high quality papers in all areas of the environmental chemical sciences, including chemistry of the air, water, soil and sediment. We welcome studies on the environmental fate and effects of anthropogenic and naturally occurring contaminants, both chemical and microbiological, as well as related natural element cycling processes.