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Formation of oil-particle aggregates with motor oil and kaolinite clay in cold and warm freshwater
Environmental Science: Processes & Impacts ( IF 4.3 ) Pub Date : 2023-02-02 , DOI: 10.1039/d2em00364c Abdulrhman Fahmi Alali 1, 2 , Shu Wang 1, 3 , Zhenduo Zhu 1 , Joseph Atkinson 1
Environmental Science: Processes & Impacts ( IF 4.3 ) Pub Date : 2023-02-02 , DOI: 10.1039/d2em00364c Abdulrhman Fahmi Alali 1, 2 , Shu Wang 1, 3 , Zhenduo Zhu 1 , Joseph Atkinson 1
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Motor oil is one of the most common pollutants in stormwater runoff in freshwater ecosystems. It can form aggregates with solids (creating oil particle aggregates, OPAs) which complicates the understanding of the fate and transport of motor oil, particularly in cold freshwater, conditions that have not been studied extensively. Laboratory and numerical experiments were conducted with kaolinite clay and three types of motor oil in both cold and warm freshwater, in which: (1) the interaction of clay particles with motor oil was experimentally investigated, in response to changes in oil viscosity, water temperature, and mixing intensity; (2) variability in particle size distribution of the formed OPAs was measured; and (3) a mechanistic OPA formation model was applied and results were compared with experimental data. The results showed that kaolinite clay and motor oil formed mostly droplet-type OPAs, lower-viscosity oil tended to form a wider size range of OPAs, and higher mixing intensity and higher water temperature produced larger numbers of smaller OPAs. Although there was a reasonably good match between the experimental data and the modeling results, more research is needed to further improve the modeling framework.
中文翻译：
在冷暖淡水中与机油和高岭土形成油颗粒聚集体
机油是淡水生态系统中雨水径流中最常见的污染物之一。它可以与固体形成聚集体（产生油颗粒聚集体，OPA），这使得对机油的归宿和运输的理解变得复杂，特别是在寒冷的淡水中，这些条件尚未得到广泛研究。在寒冷和温暖的淡水中用高岭土和三种类型的机油进行了实验室和数值实验，其中：（1）实验研究了粘土颗粒与机油的相互作用，以响应油粘度，水温的变化, 和混合强度; (2) 测量了形成的 OPA 的粒度分布的可变性；(3) 应用机械 OPA 形成模型，并将结果与实验数据进行比较。结果表明，高岭土和机油主要形成液滴型 OPA，低粘度油倾向于形成更宽尺寸范围的 OPA，更高的混合强度和更高的水温产生更多的更小的 OPA。尽管实验数据和建模结果之间有相当好的匹配，但还需要更多的研究来进一步改进建模框架。
更新日期：2023-02-02
中文翻译：
在冷暖淡水中与机油和高岭土形成油颗粒聚集体
机油是淡水生态系统中雨水径流中最常见的污染物之一。它可以与固体形成聚集体（产生油颗粒聚集体，OPA），这使得对机油的归宿和运输的理解变得复杂，特别是在寒冷的淡水中，这些条件尚未得到广泛研究。在寒冷和温暖的淡水中用高岭土和三种类型的机油进行了实验室和数值实验，其中：（1）实验研究了粘土颗粒与机油的相互作用，以响应油粘度，水温的变化, 和混合强度; (2) 测量了形成的 OPA 的粒度分布的可变性；(3) 应用机械 OPA 形成模型，并将结果与实验数据进行比较。结果表明，高岭土和机油主要形成液滴型 OPA，低粘度油倾向于形成更宽尺寸范围的 OPA，更高的混合强度和更高的水温产生更多的更小的 OPA。尽管实验数据和建模结果之间有相当好的匹配，但还需要更多的研究来进一步改进建模框架。
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