Nanotechnology for the Environment

Information about Nanotechnology for the Environment

Published on November 20, 2009

Author: ankush85

Source: authorstream.com

Content

Slide 1: Nanotechnology for the Environment AAAS Environmental Science and Technology Policy Fellow National Center for Environmental Research (NCER) U.S.EPA Slide 2: Nanotechnology and the Environment “The emerging fields of nanoscience and nanoengineering are leading to unprecedented understanding and control over the fundamental building blocks of all physical things. This is likely to change the way almost everything - from vaccines to computers to automobile tires to objects not yet imagined - is designed and made.”  - Interagency Working Group on Nanoscience, Engineering, and Technology Report (1999) Nature of nanoparticles themselves. The bad… As nano-xyz is manufactured, what materials are used? Characteristics of the products made. Manufacturing processes involved. What waste is produced? Are toxic substances used in the manufacturing of nano-xyz? What happens when nano-xyz gets into the air, soil, water, or biota? Slide 3: Cd(CH3)2 H2S gas Cadmium sulfide (CdS) “Quantum dots” Enter the environment Bio/Enviro/other applications + Avoiding the Negative Are there more benign precursor materials or synthetic methods that can be used to make the quantum dots? How are these semiconductor nanoparticles being introduced to their target? Will it be possible to recover the quantum dots for reuse? Are there measures that can be taken now to minimize or avoid the negative impact quantum dots (or other nanotechnologies) may have on the environment? CdS CdS CdS CdS CdS Slide 4: Nanotechnology has the potential to substantially benefit environmental quality and sustainability through Pollution prevention Treatment Remediation Information Nanotechnology and the Environment The good… “As EPA looks to the future, it will need to employ innovative approaches and sound science to investigate complex, interdisciplinary problems in environmental protection.” - EPA FY 2001 Annual Report Slide 5: Involved in making a manufacturing process environmentally benign. An environmentally benign material or manufactured product that replaces toxic substances or minimizes raw materials. Synthetic or manufacturing processes which can occur at ambient temperature and pressure. Nanotechnology for pollution prevention Use of non-toxic catalysts with minimal production of resultant pollutants. Use of aqueous-based reactions. Build molecules as needed --“just in time.” Nanoscale information technologies for product identification and tracking to manage recycling, remanufacture, and end of life disposal of solvents. Slide 6: Biomimetic methods of organizing metal particles 1.5 nanometers in diameter. Biomolecular nanolithography J. E. Hutchison and coworkers, Superlattices and Microstructures, Vol. 00, No. 0,2000 5mm Assembling the particles on a biopolymer template or scaffold stretched out on a surface. Nanostructures are organized into well-defined chip architectures, such as lines and grids. Process eliminates the current process chemicals that are harmful to the environment. Nanoscale assemblies have been made that demonstrate stable, room-temperature electrical behavior that may be tolerant of defects and useful in building nanoscale circuits. Slide 7: End-of-pipe management and cleanup of pollution Treatment & Remediation Iron Treatment Walls… Used in groundwater treatment for many years. Iron chemically reduces organic and inorganic environmental contaminants. Currently involves granular or “microscale” iron ( 50 mm or 50,000 nm). and Nanotechnology Nanosized iron enhances the reaction. Enhanced further by coupling with other metals (Fe/Pd)* on the nanoscale. Nano Fe0 is more reactive and effective than the microscale. Smaller size makes it more flexible -- penetrates difficult to access areas. * Elliot and Zhang ES&T 2001, 35, 4922-4926 Slide 8: Kamat, P.V, et al. J.Phys.Chem. B 2002, 106,788-794. Nanosized zinc oxide (ZnO) “senses” organic pollutants indicated by change in visible emission signal. Sensing capability means that the energy-consuming oxidation stage only occurs when the pollutants present. “Sense and Shoot” Approach to Pollution Treatment The ZnO “shoots” the pollutants via photocatalytic oxidation to form more environmentally benign compounds. Multifunctionality and “smartness” is highly desirable for environmental applications. Dual role of ZnO semicondouctor film as a sensor and photocatalyst >300 nm UV Slide 9: Used for • Process control, compliance and ecosystem monitoring, and data/information interfaces. Sensors Molecules adsorb on surface of micro cantilever, causes a change in surface stress, cantilever bends. IBM--Berger et al., Science 1997 June 27; 276: 2021-2024 Single Molecule Detection Used to detect chemicals using either a specific reaction between analyte and sensor layer or chem/physisorption processes. Applications to bio-toxins as well. Need to be • Low cost, rapid, precise, and ultra sensitive. • Operated remotely and continuously, in situ, and in real time. Slide 10: Science and Engineering approaches are needed that offer new capabilities to prevent or treat highly toxic or persistent pollutants, and that result in the more effective monitoring of pollutants or their impact in ways not currently possible. Conclusions Nanoscience, engineering, and technology holds great potential for the continued improvement of technologies for environmental protection. The recent breakthroughs in creating nanocircuitry, give further evidence and support the predictions that nanoscale science and engineering “will most likely produce the breakthroughs of tomorrow.” BUT the environmental implications (nano in the environment) need to be considered as we consider nano for the environment.

Related presentations


Other presentations created by ankush85

Nanotechnology
03. 04. 2009
0 views

Nanotechnology

Human Resource Management System
06. 03. 2009
0 views

Human Resource Management System

Nanotechnology
27. 03. 2009
0 views

Nanotechnology

INTRODUCTION TO NANOTECHNOLOGY
20. 11. 2009
0 views

INTRODUCTION TO NANOTECHNOLOGY

Nanotechnology in Sports
22. 11. 2009
0 views

Nanotechnology in Sports

Computer Architecture
14. 07. 2009
0 views

Computer Architecture

HR
18. 03. 2009
0 views

HR

Hospital Management System
08. 04. 2009
0 views

Hospital Management System

Welcome to Visual Basic
06. 03. 2009
0 views

Welcome to Visual Basic

HTML
20. 04. 2009
0 views

HTML

Computer Languages
03. 06. 2013
0 views

Computer Languages

Taking Care of Computer
03. 06. 2013
0 views

Taking Care of Computer

Understanding Camera
16. 10. 2012
0 views

Understanding Camera

Photography Technical Terms
25. 09. 2012
0 views

Photography Technical Terms

Basics of Photography
25. 09. 2012
0 views

Basics of Photography

AIR MUSCLES
03. 01. 2012
0 views

AIR MUSCLES

Molecular Nanotechnology
24. 11. 2009
0 views

Molecular Nanotechnology

Nanotech Innovation
22. 11. 2009
0 views

Nanotech Innovation

FINANCIAL  MARKET
16. 05. 2009
0 views

FINANCIAL MARKET

Operating System
19. 04. 2009
0 views

Operating System

Management Control
10. 07. 2009
0 views

Management Control

Accounting Principles
01. 07. 2009
0 views

Accounting Principles

Balance Sheet
21. 07. 2009
0 views

Balance Sheet

Balance Sheet Auditing
01. 07. 2009
0 views

Balance Sheet Auditing

BRANCH AND BOUND
05. 03. 2009
0 views

BRANCH AND BOUND

THE  THREE  BRANCHES  OF GOVERNMENT
13. 06. 2009
0 views

THE THREE BRANCHES OF GOVERNMENT

Structure of Atom
11. 05. 2009
0 views

Structure of Atom

Compression Techniques
05. 03. 2009
0 views

Compression Techniques

DYNAMIC PROGRAMMING
06. 03. 2009
0 views

DYNAMIC PROGRAMMING

Quantum Mechanics
25. 08. 2009
0 views

Quantum Mechanics

Marketing Plan
19. 06. 2009
0 views

Marketing Plan

Book Keeping
24. 06. 2009
0 views

Book Keeping

DFDS
02. 10. 2008
0 views

DFDS

Semiconductors
25. 04. 2009
0 views

Semiconductors

Organic  Chemistry
28. 04. 2009
0 views

Organic Chemistry

Atoms Molecules and Ions
17. 06. 2009
0 views

Atoms Molecules and Ions

Covalent Bond
25. 04. 2009
0 views

Covalent Bond

Cost Accounting Standards
25. 06. 2009
0 views

Cost Accounting Standards

Crisis Management
19. 06. 2009
0 views

Crisis Management

Marketing
18. 03. 2009
0 views

Marketing

Business Strategy
27. 04. 2009
0 views

Business Strategy

Time Management
23. 03. 2009
0 views

Time Management

Networking Protocols
23. 05. 2009
0 views

Networking Protocols

Network Layer
23. 05. 2009
0 views

Network Layer

Final Accounts
24. 06. 2009
0 views

Final Accounts

ARTIFICIAL  INTELLIGENCE
03. 04. 2009
0 views

ARTIFICIAL INTELLIGENCE

Play with C
08. 04. 2009
0 views

Play with C

Software Development Cycle
23. 03. 2009
0 views

Software Development Cycle

THE GREEDY METHOD
06. 03. 2009
0 views

THE GREEDY METHOD

JOB SEQUENCING
06. 03. 2009
0 views

JOB SEQUENCING

Electricity and Magnetism
29. 04. 2009
0 views

Electricity and Magnetism

Optical Fiber
24. 05. 2009
0 views

Optical Fiber

Quality Assurance
06. 03. 2009
0 views

Quality Assurance

Object-oriented Design
11. 04. 2009
0 views

Object-oriented Design

A.R. Rahman
08. 03. 2009
0 views

A.R. Rahman

Hollywood Female Celebrities
13. 03. 2009
0 views

Hollywood Female Celebrities

Flow nets
04. 09. 2009
0 views

Flow nets

Energy and Nanotechnology
22. 11. 2009
0 views

Energy and Nanotechnology

LOGIC  DESIGN
06. 03. 2009
0 views

LOGIC DESIGN

VB-IDE
06. 03. 2009
0 views

VB-IDE

DLF IPL FINAL
25. 05. 2009
0 views

DLF IPL FINAL

MINIMUM SPANNING TREES
06. 03. 2009
0 views

MINIMUM SPANNING TREES

CPU Scheduling
05. 03. 2009
0 views

CPU Scheduling

Virtual Memory
05. 03. 2009
0 views

Virtual Memory

POK
09. 05. 2009
0 views

POK

2D Transformations
05. 03. 2009
0 views

2D Transformations

Greedy Algorithms
05. 03. 2009
0 views

Greedy Algorithms

BACKTRACKING
05. 03. 2009
0 views

BACKTRACKING

DIVIDE And CONQUER
06. 03. 2009
0 views

DIVIDE And CONQUER

ELEMENTARY DATA STRUCTURES
06. 03. 2009
0 views

ELEMENTARY DATA STRUCTURES

JPEG Compression
06. 03. 2009
0 views

JPEG Compression

Mpeg-compression
06. 03. 2009
0 views

Mpeg-compression

NP - HARD
06. 03. 2009
0 views

NP - HARD

TRAVELLING SALESPERSON PROBLEM
06. 03. 2009
0 views

TRAVELLING SALESPERSON PROBLEM

VBA Introduction
06. 03. 2009
0 views

VBA Introduction

Introduction to Java
09. 03. 2009
0 views

Introduction to Java

Java  Basics
09. 03. 2009
0 views

Java Basics

Heuristic Search
13. 03. 2009
0 views

Heuristic Search

HSM
19. 03. 2009
0 views

HSM

Tata's  Nano  Car
25. 03. 2009
0 views

Tata's Nano Car

Air Cranes
08. 04. 2009
0 views

Air Cranes

Newborn Care
10. 04. 2009
0 views

Newborn Care

Photosynthesis Process
10. 04. 2009
0 views

Photosynthesis Process

ActionScript
13. 04. 2009
0 views

ActionScript

Xml
15. 04. 2009
0 views

Xml

Snakes mis use
17. 04. 2009
0 views

Snakes mis use

Php Web Development
21. 04. 2009
0 views

Php Web Development

Cricket Intro
21. 04. 2009
0 views

Cricket Intro

Cricket Umpiring and Rules
21. 04. 2009
0 views

Cricket Umpiring and Rules

Arm and Forearm
23. 04. 2009
0 views

Arm and Forearm

Elements Ions Isotopes
25. 04. 2009
0 views

Elements Ions Isotopes

Chemical Bond
25. 04. 2009
0 views

Chemical Bond

Discovering Newtons Laws
29. 04. 2009
0 views

Discovering Newtons Laws

FreeFall
29. 04. 2009
0 views

FreeFall

Digital photography
26. 04. 2009
0 views

Digital photography

Health Effects of Alcohol
26. 04. 2009
0 views

Health Effects of Alcohol

Poetry Terminology
27. 04. 2009
0 views

Poetry Terminology

Indian Force
05. 05. 2009
0 views

Indian Force

Machine Intelligence
14. 05. 2009
0 views

Machine Intelligence

Data Link Layer
16. 05. 2009
0 views

Data Link Layer

Database Development Cycle
15. 05. 2009
0 views

Database Development Cycle

Queue
15. 05. 2009
0 views

Queue

Presentaion Skills
23. 04. 2009
0 views

Presentaion Skills

Network Layers
23. 05. 2009
0 views

Network Layers

Narmada Dam, India
23. 05. 2009
0 views

Narmada Dam, India

User Datagram Protocol
24. 05. 2009
0 views

User Datagram Protocol

Linear Momentum
28. 05. 2009
0 views

Linear Momentum

Stack and Queue
04. 06. 2009
0 views

Stack and Queue

Information Management
19. 06. 2009
0 views

Information Management

Role of Senior Management
19. 06. 2009
0 views

Role of Senior Management

Wake Up India
07. 06. 2009
0 views

Wake Up India

Adobe Flex 3.0
13. 06. 2009
0 views

Adobe Flex 3.0

Adobe Flex Presentation
13. 06. 2009
0 views

Adobe Flex Presentation

Introduction to Adobe Flex
13. 06. 2009
0 views

Introduction to Adobe Flex

Adobe Flash Media Server
13. 06. 2009
0 views

Adobe Flash Media Server

Dreamweaver
13. 06. 2009
0 views

Dreamweaver

Adobe Flash
13. 06. 2009
0 views

Adobe Flash

Flash CS4 Professional
13. 06. 2009
0 views

Flash CS4 Professional

Adobe Flash Lite
13. 06. 2009
0 views

Adobe Flash Lite

Digital Camera
13. 06. 2009
0 views

Digital Camera

Mozilla_Firefox
15. 06. 2009
0 views

Mozilla_Firefox

Managerial Accounting
27. 06. 2009
0 views

Managerial Accounting

Accounting  Information  System
01. 07. 2009
0 views

Accounting Information System

RETAILING AND MARKETING
06. 07. 2009
0 views

RETAILING AND MARKETING

ACCOUNTING IN BUSINESS
05. 07. 2009
0 views

ACCOUNTING IN BUSINESS

STRATEGIC RETAIL MANAGEMENT
05. 07. 2009
0 views

STRATEGIC RETAIL MANAGEMENT

Reiki
01. 08. 2009
0 views

Reiki

Using Buttons in PowerPoint
26. 04. 2009
0 views

Using Buttons in PowerPoint

Nanotechnology  for  Students
21. 08. 2009
0 views

Nanotechnology for Students

NANOSCIENCE
25. 08. 2009
0 views

NANOSCIENCE

Fundamentals of Nanoscience
27. 08. 2009
0 views

Fundamentals of Nanoscience

Nanoscience in Nature
27. 08. 2009
0 views

Nanoscience in Nature

Applied Mechanics
04. 09. 2009
0 views

Applied Mechanics

Accounts Payable Training
27. 06. 2009
0 views

Accounts Payable Training