Evaluation of Commercially available Passive Samplers for Pollutant Saturation Monitoring in Wilming...
Download
1 / 25

Brooks Mason - PowerPoint PPT Presentation


  • 62 Views
  • Uploaded on

Evaluation of Commercially available Passive Samplers for Pollutant Saturation Monitoring in Wilmington, CA. Brooks Mason. Overview. What is passive sampling? Commercial Passive Sampling Media Environmental Justice Project Task I- Chamber Evaluations Task II- Pilot Study

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about ' Brooks Mason' - pello


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript

Evaluation of Commercially available Passive Samplers for Pollutant Saturation Monitoring in Wilmington, CA

Brooks Mason


Overview
Overview Pollutant Saturation Monitoring in Wilmington, CA

  • What is passive sampling?

  • Commercial Passive Sampling Media

  • Environmental Justice Project

    • Task I- Chamber Evaluations

    • Task II- Pilot Study

    • Task III- Harbor Communities Monitoring Study


What is passive sampling
What is Passive Sampling? Pollutant Saturation Monitoring in Wilmington, CA

  • Collection of various chemical compounds utilizing adsorbents

    • Chemical adsorbents

    • Physical adsorbents

  • Virtually maintenance free

    • Requires no pumps, moving parts, electricity, maintenance


Passive sampling cont
Passive Sampling Cont. Pollutant Saturation Monitoring in Wilmington, CA

  • Time integrated measurement

    • High Sensitivity

    • Poor Resolution

  • Relies on an experimentally calculated sampling rate


Ogawa company passive sampler
Ogawa & Company Passive Sampler Pollutant Saturation Monitoring in Wilmington, CA

  • Symmetrical Design allows for two simultaneous measurements

  • Utilizes chemical adsorbent Pads for the collection of NOx, NO2, and SO2

    • Triethanol Amine

  • Sampling Rate is Temperature and Humidity Dependent


Radiello passive sampler
Radiello Passive Sampler Pollutant Saturation Monitoring in Wilmington, CA

  • Utilizes a cylindrical diffusive body to increase surface area, sampling rate

  • Aldehydes

    • DNPH

  • Hydrogen Sulfide

    • Zinc Acetate

  • VOC

    • Carbograph 4


Importance of chemical species
Importance of Chemical Species Pollutant Saturation Monitoring in Wilmington, CA

  • Aromatics, 1,3-butadiene, and Aldehydes react with NOx to produce Ozone and are hazardous to human and ecosystem health

  • SO2 emissions produce secondary aerosols and contribute to ecosystem acidity

  • H2S is hazardous to human health and produces a foul odor


Environmental justice project eric fujita pi barbara zielinska co pi dave campbell
Environmental Justice Project Pollutant Saturation Monitoring in Wilmington, CAEric Fujita, PI; Barbara Zielinska, Co-PI; Dave Campbell

  • Task I (3/06-11/06)

    • Evaluate Passive monitors for NOx, H2S, BTEX, 1,3-butadiene, formaldehyde, acetaldehyde, acrolein in a controlled atmospheric chamber

  • Task II (8/06)

    • Evaluate Passive monitors for NOx, H2S, BTEX, 1,3-butadiene, formaldehyde, acetaldehyde, acrolein in the study area (Wilmington, CA)

  • Task III (2/07-11/07)

    • Harbor Communities Monitoring Study

      • 25 Sites

      • Other measurements include minivol particulate sampling, photoaccousitic black carbon analyzers, dusttrak, qtrak, PID, basic meteorological, quality assurance


Task i exp
Task I - exp Pollutant Saturation Monitoring in Wilmington, CA

Aldehyde Samplers

Sampling Ports

Fan

Temp/RH


Task i exp1
Task I - exp Pollutant Saturation Monitoring in Wilmington, CA

  • Chamber Exposure Information

    • 7 Day Exposures

    • Nominal Concentration based on Wilmington Average


Task i results
Task I Results Pollutant Saturation Monitoring in Wilmington, CA

*Acrolein Validation Method highly inaccurate

*VOC data is forthcoming due to 1,3 butadiene


Task ii exp
Task II exp Pollutant Saturation Monitoring in Wilmington, CA

  • Task II Study Site

    • North Long Beach AQMD Station

    • August 2006

  • Objectives

    • Evaluate Replicate Precision and Accuracy of Passive Samplers under actual Environmental Conditions

    • Evaluate effect of stagnant nightime air on sampling rate


Task ii exp1

Passive Measurement Pollutant Saturation Monitoring in Wilmington, CA

Ogawa NOx

Ogawa SO2

Radiello H2S

Radiello VOC

Radiello Aldehyde

Validation Method

AQMD NOx Box

AQMD Continuous SO2

N/A

(7) 24 hour Canisters

(7) 24 hour DNPH

Task II exp


Task ii results
Task II Results Pollutant Saturation Monitoring in Wilmington, CA


Task ii results1
Task II Results Pollutant Saturation Monitoring in Wilmington, CA


Task ii results2
Task II Results Pollutant Saturation Monitoring in Wilmington, CA


Task iii exp
Task III exp Pollutant Saturation Monitoring in Wilmington, CA

  • Harbor Communities Monitoring Study

    • 4 seasonal saturation monitoring campaigns for 1 month each, 2007

    • Winter 2/13/07 – 3/13/07 finished

    • 23 sites measure NOx, SO2, VOC, and Aldehyde

    • 6 sites for measurement of NO2

    • 3 sites for measurement of H2S

    • 1 QA site with triplicate passive measurements and validation measurements


DRI Core Pollutant Saturation Monitoring in Wilmington, CA

DRI Core + continuous

DRI Passive only

Res1

SCAQMD (tentative)

Port of Los Angeles

OCN

Port of Long Beach

FD13

Res2

HES

Res4

Res3

Revised 1/16/07

W710

Res6

E710

Res5

Res7

BFL

E110

SE

Res8

RES9

Res10

FD49

AQMD

Res11

Note: DRI’s sampling locations are preliminary and are subject to change.

PLAB


Task iii initial results
Task III Initial Results Pollutant Saturation Monitoring in Wilmington, CA


Task iii initial results1
Task III Initial Results Pollutant Saturation Monitoring in Wilmington, CA


Task iii initial results2
Task III Initial Results Pollutant Saturation Monitoring in Wilmington, CA


Task iii initial results3
Task III Initial Results Pollutant Saturation Monitoring in Wilmington, CA


Task iii initial results4
Task III Initial Results Pollutant Saturation Monitoring in Wilmington, CA


Conclusions
Conclusions Pollutant Saturation Monitoring in Wilmington, CA

  • Radiello and Ogawa passive samplers have shown throughout all experiments to be precise, accurate, and sensitive.

  • Low wind speeds have little effect on the sampling rate for all sampler types

  • Future work

    • Identify sampling rate for 1,3-butadiene in chamber exposures

      • Identify effect of storage time on recovery

    • Develop a method for passive collection of aldehydes using PFPH with analysis by thermal desorption GC/MS


Acknowledgements
Acknowledgements Pollutant Saturation Monitoring in Wilmington, CA

  • California Air Resources Board

  • Thanks to Barbara Zielinska, Eric Fujita, Dave Campbell, Larry Sheetz, Katy Rempala, Anna Cunningham, Mark McDaniel, and Mike Keith

  • Questions?


ad