SEMANA 1

Course Overview and MNA as an Evolving Technology

Welcome to the course! In the Course Overview section, you will find general information about the course as well as instructions on how to navigate the course. In the lectures for this week, we will start with history. We look at a general brief history of groundwater remediation, and then a specific history of MNA featuring a list of the key protocols from 1994 to 2015. Special topics include active remediation vs. MNA, and Neat New MNA Technologies, and how degradation, storage, and dilution are all part of the MNA story.

9 videos, 4 lecturas

Vídeo: Course Overview
Vídeo: Course Navigation
Reading: General Course Information
Reading: Discussion Forum Guidelines
Discussion Prompt: Get to Know Your Classmates!
Reading: Pre-Course Survey
Vídeo: Changing Paradigms for Groundwater Remediation
Vídeo: Active Remedation vs. MNA
Vídeo: History of MNA: Fuels, Solvents, Three Lines of Evidence
Vídeo: Key MNA Protocols
Vídeo: New Technologies, New Thinking about MNA
Vídeo: Three Key MNA Processes: 1) Degradation; 2) Storage; 3) Dilution
Reading: Week 1 Homework Exercises (Optional)

Calificado: Week 1 Quiz

SEMANA 2

Biodegradation Principles

In this series of lectures, we will learn when biodegradation can or cannot occur and what conditions are conducive to faster degradation.

7 videos, 1 lectura

Vídeo: Thermodynamic Feasibility of Biodegradation
Vídeo: All About Electron Donors and Acceptors
Vídeo: Biodegradation Mechanisms: Chlorinated Solvents vs Hydrocarbons
Vídeo: Reactions at Interfaces and Sustained Treatment: Emerging Concepts
Vídeo: Biodegradation Kinetics: from Monod to First-Order Models
Vídeo: Mass Balance Type Calculations
Reading: Week 2 Homework Exercises (Optional)

Calificado: Week 2 Quiz

SEMANA 3

Abiotic Degradation Principles

In this series of lectures, we will focus on the principles of abiotic degradation and discuss how these processes support monitored natural attenuation. You will be learning about the key reactions and minerals that are involved in abiotic degradation. We will also be covering what methods are used to determine if abiotic degradation is relevant at a particular site, and the rates at which these reactions may be occurring

6 videos, 1 lectura

Vídeo: Which Minerals Degrade which Contaminants?
Vídeo: Reaction Models
Vídeo: Methods and Challenges for Documenting Abiotic Degradation
Vídeo: Other Abiotic Reactions: Hydrolysis
Vídeo: Application: Does Abiotic Degradation Explain Attenuation Observed at Field Site?
Reading: Week 3 Homework Exercises (Optional)

Calificado: Week 3 Quiz

SEMANA 4

Attenuation and Storage in Low K Zones

In these lectures, we will focus on the idea that storage of contaminants in geologic media as a potential natural attenuation mechanism. Under this scenario, certain contaminants diffuse in low permeability media such as silt, clay, and limestone and then eventually reenter the aquifer by a process called back diffusion. Like sorption, this process is not destructive, but attenuates a contaminant plume by sequestering some of the initial loading and then slowly releases it over long time scales. You will learn about diffusion vs. dispersion, see case studies in the lab and field, learn how to sample and model this process, and hear the latest research about degradation processes associated with matrix diffusion.

6 videos, 1 lectura

Vídeo: Diffusion vs Dispersion
Vídeo: Matrix Diffusion in the Lab and Field
Vídeo: Matrix Diffusion Sampling
Vídeo: Groundwater Models for Matrix Diffusion
Vídeo: Degradation Processes Within Low-k Zones
Reading: Week 4 Homework Exercises (Optional)

Calificado: Week 4 Quiz

SEMANA 5

Dilution as an Attenuation Process - Sometimes

In this series of lectures, we will discuss how dilution is an attenuation process – sometimes. We start with the basics, and review groundwater flow and one of the “top ten things” that every hydrogeologist should know: the distinction between Darcy Velocity and Seepage Velocity. Next we give some examples of regulatory programs where dilution is considered an acceptable attenuation process. Then we present how dispersion and mixing in wells are dilution-related processes. Finally we show how the emerging field of mass flux/ mass discharge can be used to see if a contaminant plume is strong enough to impact water supply wells and/or streams, and to see where your plume ranks in the “Plume Magnitude Classification System.”

6 videos, 1 lectura

Vídeo: Darcy vs. Seepage Velocity
Vídeo: Attenuation Due to Mixing and Dispersion
Vídeo: Mass Flux/Mass Discharge Concepts for Estimating Dilution
Vídeo: Mass Flux/Mass Discharge Measurement Methods
Vídeo: Plume Magnitude Classification System/Mass Discharge Wrap Up
Reading: Week 5 Homework Exercises (Optional)

Calificado: Week 5 Quiz

SEMANA 6

Better Technologies: Compound Specific Isotopes & Molecular Biological Tools

In this series of lectures, we will focus on several established and emerging methods for demonstrating that biological and other attenuation processes are occurring. We will start with an overview on lines of evidence for biological degradation processes, and then transition to newer molecular methods for identifying and quantifying biodegradation potential for a variety of compounds. Several of this week’s lectures also examine compound-specific isotope analysis, which has been emerging as a key resource for MNA studies. You will learn how stable isotope analyses can provide critical information on whether attenuation is occurring, the rate at which it is occurring, and even the pathway that is responsible.

6 videos, 1 lectura

Vídeo: Interpreting CSIA Data
Vídeo: Emerging Technologies with Isotopes: Pathways and Modeling
Vídeo: Demonstrating In-Situ Biodegradation
Vídeo: Molecular Evidence of Biodegradation
Vídeo: Stable Isotope Probing
Reading: Week 6 Homework Exercises (Optional)

Calificado: Week 6 Quiz

SEMANA 7

Monitoring for MNA

In this series of lectures, we will discuss how you should perform the monitoring that is such an important part of monitored natural attenuation (after all, it’s right there in the title!). We start off with a discussion of how data are collected, including using newer high-resolution techniques, to help build a proper conceptual site model and support the selection of MNA as a remedy. Then we touch on how to design a long-term monitoring program to assess the performance of MNA. Methods for analyzing concentration trends and graphically presenting MNA data are also presented, along with a discussion of the potential sources of variability in monitoring data.

6 videos, 1 lectura

Vídeo: Designing an MNA Monitoring Program
Vídeo: Monitoring Frequency
Vídeo: Trend Analysis
Vídeo: Monitoring Well Dynamics
Vídeo: Key MNA Calculations and Graphics
Reading: Week 7 Homework Exercises (Optional)

Calificado: Week 7 Quiz

SEMANA 8

Modeling Tools to Support MNA

In this series of lectures, we talk about models and how they can be used to understand MNA. We first start with two key MNA questions: How Long? (will the plume get) and How Far? (how long until the site is clean). Then a review of analytical computer models, remediation timeframe models, the more complex but more powerful numerical models, and even a discussion of the “Fourth Paradigm: Big Data”.

6 videos, 1 lectura

Vídeo: Fate and Transport Equations for MNA
Vídeo: Analytical Groundwater Models for MNA
Vídeo: Estimating Remediation Timeframes
Vídeo: MNA Lessons from "Big Data" Studies
Vídeo: Numerical Groundwater Computer Models and MNA
Reading: Week 8 Homework Exercises (Optional)

Calificado: Week 8 Quiz

SEMANA 9

New Directions for MNA

This final series of lectures will cover a mélange of interesting MNA topicsl We start with the brand new ESTCP BIOPIC tool, then talk about the broad universe of MNA that extends to a lot of different contaminant classes. Then some new developments in the LNAPL world: Natural Source Zone Depletion, both with conventional methods and a new method based on thermal monitoring. Then we talk a little bit about low threat closures and transition assessments, and end up with a brief conversation with the three instructors. And then you are done!

6 videos, 2 lecturas

Vídeo: Applicability of MNA for Different Contaminant Classes
Vídeo: Natural Source Zone Depletion (NSZD)
Vídeo: Thermal Monitoring of Natural Source Zone Depletion (Thermal NSZD)
Vídeo: Low Risk Sites, Transition Assessments, and MNA
Vídeo: Where MNA Might Go From Here
Reading: Week 9 Homework Exercises (Optional)
Reading: End-of-Course Survey

Calificado: Week 9 Quiz

Nivel	Avanzado
Idioma	English
Cómo aprobar	Aprueba todas las tareas calificadas para completar el curso.
Calificaciones del usuario	4.8 estrellas Calificación promedio del usuario 4.8Ve los que los estudiantes dijeron

	Comprar curso
Accede a los materiales del curso	Disponible
Accede a los materiales con calificación	Disponible
Recibe una calificación final	Disponible
Obtén un Certificado de curso para compartir	Disponible

Natural Attenuation of Groundwater Contaminants: New Paradigms, Technologies, and Applications

Natural Attenuation of Groundwater Contaminants: New Paradigms, Technologies, and Applications