Depletion rates of O2-naphthenic acids from oil sands process-affected water in wetland microcosms†

IF 4.3 3区 环境科学与生态学 Q1 CHEMISTRY, ANALYTICAL Environmental Science: Processes & Impacts Pub Date : 2024-09-09 DOI:10.1039/D4EM00227J
Alexander M. Cancelli and Frank A. P. C. Gobas
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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.

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湿地微生态系统中受油砂加工影响水体中 O2 环烷酸的损耗率。
构建了处理湿地微观世界,以评估 O2-环烷酸在仅含有 OSPW(即自然衰减)、OSPW 与泥炭土(吸附和微生物降解)以及香蒲微观世界反应器(植物介导的吸收和生物转化)的微观世界中的去向。OSPW 的损耗机制包括自然衰减、吸附和微生物降解以及植物介导的吸收和生物转化。O2 环烷酸的平均消耗率在仅有 OSPW 的情况下为每天 0.005(SD 0.010),在有泥炭土的 OSPW 中为每天 0.029(SD 0.013),在香蒲微生态系统反应器中为每天 0.043(SD 0.013)。通过自然衰减从 OSPW 中去除环烷酸的速度较慢,这突出表明有必要为 OSPW 制定有效的补救策略,而香蒲微观世界反应器中环烷酸去除率的增加突出表明了湿地植被在支持从 OSPW 中去除环烷酸方面的重要性。与仅含有 OSPW 的反应器相比,含有 OSPW 和泥炭土的反应器对较低分子量同系物的 O2 环烷酸损耗率增幅最大。与含有 OSPW 和泥炭土的反应器相比,香蒲微观世界反应器中较高分子量同系物的 O2-环烷酸耗竭率增幅最大。
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来源期刊
Environmental Science: Processes & Impacts
Environmental Science: Processes & Impacts CHEMISTRY, ANALYTICAL-ENVIRONMENTAL SCIENCES
CiteScore
9.50
自引率
3.60%
发文量
202
审稿时长
1 months
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.
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