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博碩士論文 etd-0922103-171007 詳細資訊
Title page for etd-0922103-171007
論文名稱
Title
疏水性有機污染物之吸附及脫附動力傳輸之數值模擬
A Numerical Simulation of HOPs Transport with a Sorption-Desorption Kinematic Model
系所名稱
Department
畢業學年期
Year, semester
語文別
Language
學位類別
Degree
頁數
Number of pages
75
研究生
Author
指導教授
Advisor
召集委員
Convenor
口試委員
Advisory Committee
口試日期
Date of Exam
2003-06-30
繳交日期
Date of Submission
2003-09-22
關鍵字
Keywords
疏水性有機污染物、脫附、射流、吸附
sorption, jet, hydrophobic organic pollutants, desorption
統計
Statistics
本論文已被瀏覽 5722 次,被下載 1254
The thesis/dissertation has been browsed 5722 times, has been downloaded 1254 times.
中文摘要
在過去的數十年來,與人類健康息息相關之污染物的傳播一直是主要的水質和環境相關議題。疏水性有機污染物由於具高毒性和高生物累積性,在許多國家中將其列為重要污染物之一。雖然並非所有的化學和物理因素在污染物之傳輸中均需被考慮,但在之前已有一簡單一維的數學模式在概念上包含所有因素已被發展 ( Bobba et al., 1996)。在當時的研究中,幾乎所有這些重要參數都已經驗化。在本篇研究報告中已成功發展了二維的數值模式且此一模式能夠容易地擴展成三維之模式。模式包括了可能影響污染物的傳輸相關的物理和化學的因素。為證實和確認本模式,在目前的研究中僅先考慮吸附與脫附作用並結合了沈降效應。從模擬的結果, 吸附和脫附作用的機制和污染物沈澱之清除效應的影響很明顯地影響了從河口排放廢水中的污染物之命運和傳輸。


Abstract
The transport of health-related organic micropollutans has been a major water quality and environmental issue in the past few decades. Because of their high toxicity, long environmental half-life and high bioaccumulation factors, many of the hydrophobic organic pollutants (HOPs) are listed as priority pollutants in many countries.
Although not all of the chemical and physical factors should be considered in the fate of transportation of all chemicals, a simple one-dimensional mathematical model used to simulate all of the factors was conceptually developed (Bobba et al., 1996). In that study, most important parameters needed in the model were empirically fitted. For numerical simulation of the behaviors of pollutants in the environment, it is important to provide a feasible chemical and physical transport mechanism to describe the geo-chemical and geophysical interactions involved in the system. In this study a general two-dimensional hydrodynamic numerical simulation model is developed .This model can readily extend to a three-dimensional one. The model includes all possible physical and chemical factors that might affect the transport of the pollutants. For validation and demonstration purpose, only sorption-desorption between specified dissolved organic material and phase are studied in the present study. The hydrodynamic model is verified by comparing with the reported numerical results. The numerical model then incorporates the sorption-desorption terms and the sediment effects. From the results of the simulation, the sorption-desorption mechanism and sediment scavenge effect are founded to significantly affects the pollutants fate and transport of an outfall discharge.



目次 Table of Contents
ABSTRACT 1
CHAPTRE 1 INTRODUCTION 3
1.1 Introduction 3
1.2 Literature Review 4
CHAPTER 2 MATHEMATICAL MODEL 6
2.1 Governing Equations 6
2.1.1 Equations of Fluid Motion 6
2.1.2 Pollutant Concentration Equations 8
2.1.3 Transport of Solid Particulates 9
2.2 Boundary Conditions 10
2.3 Coordinate Transformation 11
2.4 Dimmensionless Equations 13
CHAPTER 3 COMPUTATIONAL ALGORITHM 18
3.1 Finite Difference Method 18
3.2 Procedures of Numerical Computation 21
CHAPTER 4 RESULTS AND DISCUSSION 23
4.1 Results of Outfall Flowfield Simulation 23
4.1.1 Case (a): u=0.1 m/s , w=1.0 m/s 23
4.1.2 Case (b): u=0.2 m/s , w=1.0 m/s 25
4.2 Results of Dissolved And Particulate Contaminant Concentration Simulation 27
4.2.1- 1 Case (1): (early stage) 28
4.2.1- 2 Case (2): (early stage) 34
4.2.1- 3 Case (3): (early stage) 40
4.2.1- 4 Case (4): (early stage) 46
4.2.2- 1 Case (1): (later stage) 52
4.2.2- 2 Case (2): (later stage) 56
4.2.2- 3 Case (3): (later stage) 60
4.2.2- 4 Case (4): (later stage) 64
4.2.3 Discussion about Ku,K,Ws,R 69
CONCLUSION 74
SUGGESTION 75

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