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Explore and master the fundamentals of Environmental Quality Monitoring & Analysis, - Vol 4
You've not yet enrolled in this course. Please enroll for free to listen to audio lessons, classroom podcasts and take practice test.Chapter 1
This chapter focuses on essential parameters for calculating dispersion in environmental quality monitoring, particularly from industrial emissions. It discusses the influence of wind speed, stack height, and stability conditions on dispersion modeling. Tools like the windrose are introduced to analyze wind direction and speed, which are critical for predicting the environmental impact of emissions.
Chapter 2
The chapter provides an overview of dispersion modeling, focusing on emission rates calculated from the emission factor and activity rate. It emphasizes the importance of accurately measuring various pollutants from different combustion sources, including stationary and mobile sources. Furthermore, the discussion introduces fugitive emissions and their unique challenges, outlining how to estimate emissions and the impact of reflection on dispersion modeling.
Chapter 3
The chapter covers the Gaussian dispersion model to estimate the concentration of pollutants emitted from various sources. It discusses the application of this model in real-world scenarios, emphasizing the significance of receptor locations in assessing air quality. Further, it highlights the importance of planning for emergency responses and the strategic siting of industrial sources to minimize public exposure to pollution.
Chapter 4
This chapter discusses regulatory models for environmental quality assessment, particularly focusing on dispersion modeling. It emphasizes the importance of understanding the interactions between air masses and how pollutants disperse in various environmental contexts. The chapter also introduces different modeling techniques and frameworks used for accurate assessment of air pollution.
Chapter 5
This chapter focuses on the principles of interphase mass transfer, particularly in environmental contexts. It explores various scenarios of mass transfer, such as chemical release from a surface into different mediums including air, water, and soil. Additionally, it discusses the implications of these processes for understanding environmental impacts and contamination over time.
Chapter 6
The chapter delves into the fundamentals of transport phenomena, particularly focusing on molecular diffusion and bulk flow in various environmental systems. It examines how these mechanisms interact in lakes, rivers, oceans, and groundwater, highlighting scenarios where diffusion predominates over bulk flow and vice versa. Additionally, the discussion includes pollutant transport and the implications for environmental monitoring.
Chapter 7
The chapter focuses on interphase mass transfer, particularly emphasizing Fick's law of diffusion and its implications for environmental quality. It outlines how diffusion is influenced by medium properties, molecular weight, and viscosity, and presents models for understanding mass transfer in sediment and water systems. Resistance to mass transfer and its correlation with hydrodynamics are also discussed.
Chapter 8
The chapter focuses on interphase mass transfer and its governing principles, particularly emphasizing the concepts of boundary layers and mass transfer coefficients. Through an exploration of diffusion and convection, it highlights how these forces interact during mass transfer processes in various fluid systems. The chapter also discusses the significance of understanding mass transfer in environmental contexts, enabling more effective monitoring and analysis activities.
Chapter 9
The chapter discusses interface mass transfer, particularly focusing on air-water interactions and the associated resistances at the mass transfer interfaces. It elaborates on the impact of mixing and boundary layers on concentration gradients, highlighting the difficulty of measuring conditions at molecular levels while emphasizing the assumptions made in mass transfer studies. The steady-state assumption plays a significant role in simplifying the analysis of flux across interfaces.
Chapter 10
The chapter outlines the principles of mass transfer across interfaces and defines mass transfer coefficients, emphasizing the significance of concentration gradients in mass transfer dynamics. It introduces the concept of resistance in series, demonstrating how individual resistances in different phases affect overall mass transfer rates. The chapter concludes by discussing the need to estimate mass transfer coefficients and analyze their impact on environmental situations.
Chapter 11
The chapter discusses the estimation of mass transfer coefficients in various systems using empirical correlations derived from experimental data. It emphasizes the importance of understanding the mass transfer process and the factors influencing these coefficients such as geometry, velocity, and diffusion properties of different chemicals. Techniques for measuring mass transfer coefficients through controlled experiments are also highlighted, along with the application of these coefficients in real-world scenarios.