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首页> 外文期刊>Hydrobiologia >Contribution of biological processes to self-purification of water with respect to petroleum hydrocarbon associated with No. 0 diesel in Changjiang Estuary and Jiaozhou Bay, China
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Contribution of biological processes to self-purification of water with respect to petroleum hydrocarbon associated with No. 0 diesel in Changjiang Estuary and Jiaozhou Bay, China

机译：长江口和胶州湾0号柴油所含石油烃的生物过程对水自净的贡献

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Mesocosms in 25-m~3 ethylene vinyl acetate or 4-m~3 polyethylene bags were performed at two sites in China: Changjiang Estuary in spring-summer 1998, and Jiaozhou Bay in autumn 1999 and spring-summer 2000. The experiments were designed to show the contributions of physical, physicochemical and biological processes to self-purification of water with respect to the water-soluble fraction (WSF) of petroleum hydrocarbon associated with No. 0 diesel (PHAD). Over the experimental periods, the WSF-PHAD concentration in water declined significantly. A kientic model for WAS-PHAD distribution in multiphase environments-in this case water (W), suspended sediment (SS), phytoplankton (PPT), zooplankton (ZPT) and atmosphere (ATM)-was developed to estimate the contributions of the various processes. In the model, the key processes responsible for self-purification include contributions of the various processes. In the model, the key processes responsible for self-purification inclde (1) physical transport by voltatilization from W to ATM; (2) biological transformation through biodegradation; (3) biological transfer involving bioconcentration by PPT and ZPT; and (4) physicochemical transfer through sorption by SS. Model parameters were determined from the mesocosm experiments and parallel laboratory experiments, or taken from the literature. It indicated that volatilization plays an important role in short-term self-purification especially regarding alkanes with relatively low molecular weight, accounting for 82.9 +- 2.5%. After the volatilization stops, bioconcentration by PPT contributes greatly to long-term self-purification especially regarding alkanes of higher molecular weight and polycyclic aromatic hydrocarbons (PHAs), accounting for 0.7-17.8% with an average of 7.8 +- 7.3%. The bioconcentration is dominated by biomass of PPT as well as the WSF-PHAD concentration. However, the biodegradation process makes the greatest contribution to both the short-and long-term self-purification, affecting alkanes of both lower and higher molecular weights as well as PHAs. The results suggest that it is necessary to take into account the biological processes of biodegradation and bioconcentration in estimating the self-purification of water with respect to oil pollutants.
机译：在中国的两个地点进行了25-m〜3乙烯醋酸乙烯酯袋或4-m〜3聚乙烯袋的内缩膜试验：1998年春夏季的长江口，1999年秋季和2000年春夏季的胶州湾。展示了与0号柴油（PHAD）有关的石油烃的水溶性部分（WSF）的物理，物理化学和生物过程对水自净的贡献。在实验期间，水中的WSF-PHAD浓度显着下降。建立了WAS-PHAD在多相环境中分布的运动学模型，在这种情况下，是水（W），悬浮沉积物（SS），浮游植物（PPT），浮游动物（ZPT）和大气（ATM）-用于估计各种环境的贡献流程。在模型中，负责自我净化的关键过程包括各种过程的贡献。在该模型中，负责自我净化的关键过程包括：（1）通过从W到ATM的电压物理传输。 （2）通过生物降解进行生物转化; （3）涉及通过PPT和ZPT进行生物浓缩的生物转移; （4）通过SS的吸附进行物理化学转移。模型参数由中观实验和平行实验室实验确定，或取自文献。表明挥发在短期自我纯化中起着重要作用，尤其是对于分子量相对较低的烷烃而言，占82.9±2.5％。挥发停止后，PPT的生物富集极大地有助于长期自我纯化，尤其是对于较高分子量的烷烃和多环芳烃（PHA），占0.7-17.8％，平均为7.8±7.3％。 PPT的生物量以及WSF-PHAD的浓度决定了生物浓度。然而，生物降解过程对短期和长期的自我纯化都做出了最大的贡献，影响了分子量较低和较高的烷烃以及PHA。结果表明，在估计相对于油污染物的水的自净时，有必要考虑生物降解和生物浓缩的生物学过程。

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