山东近海陆源耗氧有机物生物可利用性及其降解动力学研究

发布时间：2018-06-02 08:43

本文选题：降解动力学 + 生物可利用性　；参考：《中国海洋大学学报(自然科学版)》2017年07期

【摘要】：针对因不同陆源耗氧有机物组成和生物可利用性的差异,单一表观降解模式难以满足近海水环境管理中对耗氧有机物浓度准确模拟计算的问题,选择山东省近海典型陆源污染来源,通过实验室受控培养实验,研究不同来源耗氧有机物(以COD表征)的生物可利用性及其降解动力学规律。结果显示,耗氧有机物的降解基本符合准一级动力学规律,即先快后慢最后趋于稳定的降解规律,且不同陆源耗氧有机物降解速率常数及生物可利用性存在显著差异(P0.01)。其中,纺织印染厂来源耗氧有机物的生物可利用性最大,约为92%,其次为污水处理厂和小清河来源,而虞河和啤酒厂来源最小;啤酒厂来源耗氧有机物降解速率常数最高,约为0.40d~(-1),其次为污水处理厂来源,而小清河、虞河以及印染厂来源最低。根据降解速率常数的不同,可以将不同来源的耗氧有机物分为四类:食品工业源(啤酒厂)生物可利用组分,城镇生活源(污水处理厂)生物可利用组分,河流综合源(小清河、虞河和印染厂)生物可利用组分以及难降解组分。污水处理厂来源耗氧有机物培养实验结果表明,耗氧有机物的降解速率常数随温度的升高及搅拌速率的增强而增大,生物可利用性则随水动力条件的增强而增大。本文研究结果可为提高水环境管理中水质模拟计算准确性提供实验支持。
[Abstract]:In view of the differences in composition and bioavailability of oxygen consuming organic compounds from different terrestrial sources, a single apparent degradation model is difficult to satisfy the problem of accurate simulation and calculation of the concentration of oxygen consuming organic compounds in coastal water environment management. The bioavailability and degradation kinetics of different sources of oxygen-consuming organic compounds (characterized by COD) were studied by means of controlled culture experiments in Shandong Province, which were selected from typical land-based pollution sources off the coast of Shandong Province. The results showed that the degradation of oxygen consuming organic matter basically accords with the quasi-first-order kinetic law, that is, the degradation law of fast first, then slow and then stable, and the degradation rate constant and bioavailability of different terrestrial organic compounds are significantly different (P 0.01). Among them, the bioavailability of oxygen consuming organic compounds from textile printing and dyeing factories was the largest (about 922), followed by sewage treatment plants and Xiaoqing River sources, while the sources of Yuhe and breweries were the least, and the degradation rate constants of oxygen consuming organic compounds from breweries were the highest. It was about 0.40 d ~ (-1), followed by wastewater treatment plant, while Xiaoqing River, Yuhe and printing and dyeing plants were the lowest. According to the degradation rate constant, different sources of organic oxygen consumption can be divided into four categories: food industry sources (breweries) bioavailable components, urban sources (sewage treatment plants) bioavailable components, River integrated sources (Xiaoqing River, Yuhe and dyeing plants) can be used by biological components as well as refractory components. The results showed that the degradation rate constant of organic matter increased with the increase of temperature and agitation rate, and the bioavailability increased with the increase of hydrodynamic conditions. The results of this paper can provide experimental support for improving the accuracy of water quality simulation calculation in water environment management.
【作者单位】：中国海洋大学海洋化学理论与工程技术教育部重点实验室化学化工学院;青岛市环境保护科学研究院;
【基金】：国家自然科学基金委员会-山东省人民政府联合资助海洋科学研究中心项目(U1406403)资助~~
【分类号】：X55

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