Read Anywhere and on Any Device!

Subscribe to Read | $0.00

Join today and start reading your favorite books for Free!

Create Free Account

Quick and Easy Sign Up!

It takes less then 1 minute to sign up, then you can enjoy Unlimited eBooks.

Sign Up Browse

Popular Genres

Read Anywhere and on Any Device!

  • Download on iOS
  • Download on Android
  • Download on iOS

Characterization and source apportionment of urban particulate matter.

Characterization and source apportionment of urban particulate matter.

Qinyue. Sun
0/5 ( ratings)
Read Download
Particulate matter is known to be harmful to human beings. The US Environmental Protection Agency has set standards for PM concentration in the atmosphere. In cases of high PM episodes it is important to know the sources of PM in order to develop efficient reduction strategies.;A high-volume cascade impactor ChemVol 2400 with polyurethane foam and polypropylene foam as collection substrates was used for PM sample collection. In this work a novel protocol was developed for both substrate pre-cleaning and analyte extraction. This method is suitable for quantification of a suite of semi and non-polar organic tracer compounds in 24-h and even 3-h ambient PM samples.;Aerosol particle composition varies with particle size. The improved analytical technique developed was used to investigate the variation of organic species with particle size in a field experiment in Nogales, Arizona. The hypothesis that the size distribution of molecular marker species changed substantially between morning, evening and 24 hour averages was examined.;Occasionally in Nogales, annual and daily maximum PM10 and PM2.5 concentrations are near or above the EPA standard. A field campaign was performed in Winter 2005/06 in Nogales. Source apportionment was performed using the EPA CMB model. Results showed that 2 distinct pollution peaks were observed on many days, one in the morning and one in the afternoon/evening hours. 10-20% of the PM sources were not identified.;Aeration is used at the majority of wastewater treatment plants . During the aeration process aerosol particles can be emitted by bubble bursting. The present work is designed to determine aerosol emissions from wastewater treatment plants and assess their impact on urban air quality. Field campaigns were performed in Arizona Wastewater Treatment plants. Results show that daily fine particulate matter emissions are low . Surface emission fluxes are ∼0.5mug/ which are more than 2 orders of magnitude lower than laboratory experiments on sea salt. The odor control system investigated in the present study was able to reduce PM emissions by ∼80%, slightly higher in PM10 than PM2.5.
Pages
140
Format
NOOKstudy eTextbook
Publisher
ProQuest LLC
Release
October 25, 2022
ISBN
1109571887
ISBN 13
9781109571882

Characterization and source apportionment of urban particulate matter.

Qinyue. Sun
0/5 ( ratings)
Read Download
Particulate matter is known to be harmful to human beings. The US Environmental Protection Agency has set standards for PM concentration in the atmosphere. In cases of high PM episodes it is important to know the sources of PM in order to develop efficient reduction strategies.;A high-volume cascade impactor ChemVol 2400 with polyurethane foam and polypropylene foam as collection substrates was used for PM sample collection. In this work a novel protocol was developed for both substrate pre-cleaning and analyte extraction. This method is suitable for quantification of a suite of semi and non-polar organic tracer compounds in 24-h and even 3-h ambient PM samples.;Aerosol particle composition varies with particle size. The improved analytical technique developed was used to investigate the variation of organic species with particle size in a field experiment in Nogales, Arizona. The hypothesis that the size distribution of molecular marker species changed substantially between morning, evening and 24 hour averages was examined.;Occasionally in Nogales, annual and daily maximum PM10 and PM2.5 concentrations are near or above the EPA standard. A field campaign was performed in Winter 2005/06 in Nogales. Source apportionment was performed using the EPA CMB model. Results showed that 2 distinct pollution peaks were observed on many days, one in the morning and one in the afternoon/evening hours. 10-20% of the PM sources were not identified.;Aeration is used at the majority of wastewater treatment plants . During the aeration process aerosol particles can be emitted by bubble bursting. The present work is designed to determine aerosol emissions from wastewater treatment plants and assess their impact on urban air quality. Field campaigns were performed in Arizona Wastewater Treatment plants. Results show that daily fine particulate matter emissions are low . Surface emission fluxes are ∼0.5mug/ which are more than 2 orders of magnitude lower than laboratory experiments on sea salt. The odor control system investigated in the present study was able to reduce PM emissions by ∼80%, slightly higher in PM10 than PM2.5.
Pages
140
Format
NOOKstudy eTextbook
Publisher
ProQuest LLC
Release
October 25, 2022
ISBN
1109571887
ISBN 13
9781109571882

More books from Qinyue. Sun

Rate this book!

Write a review?

loader