Creating air pollution map and analyzing traffic survey ...€¦ · Emission from motor bikes,...

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Creating air pollution map and analyzing traffic survey with VNU-HCM students Osaka Prefecture University Tomofumi Kiyose Yusuke Suda Takako Yamazaki

Transcript of Creating air pollution map and analyzing traffic survey ...€¦ · Emission from motor bikes,...

Page 1: Creating air pollution map and analyzing traffic survey ...€¦ · Emission from motor bikes, cars, etc. Air pollutions(CO 2, NO ... • Front of VNUHCM (NVC street) • Both street

Creating air pollution map and analyzing traffic survey with VNU-HCM students

Osaka Prefecture University

Tomofumi Kiyose

Yusuke Suda

Takako Yamazaki

Page 2: Creating air pollution map and analyzing traffic survey ...€¦ · Emission from motor bikes, cars, etc. Air pollutions(CO 2, NO ... • Front of VNUHCM (NVC street) • Both street

Air pollution

Economy of Vietnam is significantly developing

Reason of air pollution:◆Rapid economic growth◆Growth of populations◆Major development of industries

Especially problems in urban area

Emission from motor bikes, cars, etc.Air pollutions(CO2, NOx etc.)

Air pollutants increase in Vietnam

2Background

Page 3: Creating air pollution map and analyzing traffic survey ...€¦ · Emission from motor bikes, cars, etc. Air pollutions(CO 2, NO ... • Front of VNUHCM (NVC street) • Both street

Purpose

Air monitoring by setting equipment in Ho Chi Minh city.→make pollution map

Compare with the result of same experiment last several year.

→discuss about the change of the pollution in Ho Chi Minh city

Sampling with Vietnamese students→attend in international joint study

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Page 4: Creating air pollution map and analyzing traffic survey ...€¦ · Emission from motor bikes, cars, etc. Air pollutions(CO 2, NO ... • Front of VNUHCM (NVC street) • Both street

Materials & Methods

to identify the factor of air pollution clearly

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49 sampling points

to measure NO2 ,NH3 ,O3

1. Passive Sampler

2. Filter pack

4 sampling points

to measure PM2.5, HNO3, HONO, NO2 and NH3

3. Traffic Count

Page 5: Creating air pollution map and analyzing traffic survey ...€¦ · Emission from motor bikes, cars, etc. Air pollutions(CO 2, NO ... • Front of VNUHCM (NVC street) • Both street

Materials & Methods

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VNUHCM

Passive samples

+ Filter Pack

City area

Page 6: Creating air pollution map and analyzing traffic survey ...€¦ · Emission from motor bikes, cars, etc. Air pollutions(CO 2, NO ... • Front of VNUHCM (NVC street) • Both street

What is passive sampler?

Sampler : low Atmosphere : high

Trapping filter

Diffusion of gaseous particles resulted from difference of the gaseous concentration

Principle of passive sampler

○Advantage*Not use power source*Small and light*Low cost*Easy to set and collect

×Disadvantage*Variation is over 10 %

Page 7: Creating air pollution map and analyzing traffic survey ...€¦ · Emission from motor bikes, cars, etc. Air pollutions(CO 2, NO ... • Front of VNUHCM (NVC street) • Both street

Passive sampler

Airheight : 19 mmdiameter : 30 mmφ

pore size:1.0 mm

remove particles and water drop

Teflon filter

Filter include chemical

To catchNH3 → H3PO4

O3 → NaNO2

NO2 → N(CH2CH2OH)3

Page 8: Creating air pollution map and analyzing traffic survey ...€¦ · Emission from motor bikes, cars, etc. Air pollutions(CO 2, NO ... • Front of VNUHCM (NVC street) • Both street

Filter pack

○Advantage

*Small and light

*Can collect samples where is no analyzers

×Disadvantage

Need power source

Analysis

Page 9: Creating air pollution map and analyzing traffic survey ...€¦ · Emission from motor bikes, cars, etc. Air pollutions(CO 2, NO ... • Front of VNUHCM (NVC street) • Both street

Filter pack

pump

F7: TEA 20 %(NO2)F8: TEA 20 %(NO2)

0.1 L/min

3.9 L/min

Calculation

HONO concn. : F4-F5

NO2 concn. : F5×2+F7+F8

MFC

4.0 L/minAir MFC

F1: Donut filter(particle >2.5 µm)F2: Quartz filter(PM2.5)F3:NaCl(HNO3 all)F4: Na2CO3(HONO all、NO2 about 2 %)F5: Na2CO3(Compensate for NO2 of F4)F6: H3PO4 (NH3 all)

Page 10: Creating air pollution map and analyzing traffic survey ...€¦ · Emission from motor bikes, cars, etc. Air pollutions(CO 2, NO ... • Front of VNUHCM (NVC street) • Both street

Analytical method

Passive sampler(49 places)

Material Analytical method

NH3 IC

NO2 UV-vis

O3 UV-vis

Filter pack sampler(4 places)

Material Analytical method

PM2.5 Weight measurement

HONO IC

HNO3 IC

NH3 IC

NO2 UV-vis

Page 11: Creating air pollution map and analyzing traffic survey ...€¦ · Emission from motor bikes, cars, etc. Air pollutions(CO 2, NO ... • Front of VNUHCM (NVC street) • Both street

Program schedule

Passive sampler

Filter pack Activity

21/8 Group meeting Welcome party

22 set set Plastic factory

23 Mekong Delta

24 Change filterDalat travel

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26 Change filterCity tour & Cultureexchange program

27 Water park

28 Collect sample Collect samples Karaoke & city tour

29 Analyzing Super market

30 Presentation Ben Tanh market

Keep

Page 12: Creating air pollution map and analyzing traffic survey ...€¦ · Emission from motor bikes, cars, etc. Air pollutions(CO 2, NO ... • Front of VNUHCM (NVC street) • Both street

Pollution Map:NH3 (2018)

Big Highway

2 km

Tan Binh Dist

Dist. 9

Dist. 2

Dist. 4

Dist. 1

Dist. 3

Dist. 10

Dist. 11

Dist. 6

Dist. 8Dist. 7

Dist. 5

Dist. 12

Thu Duc Dist.

Binh ChanhDist.

Hoc Mon Dist.

Binh ThanhDist.

Phu NhuanDist.

Go Vap Dist.

NH3 ppb75 ~

50 to 75

25 to 50

0 to 25

Saigon River

Big Highway

City area

2018

Emission source:Waste water

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NH3 Comparison 2017-18

NH3 ppb75 ~

50 to 75

25 to 50

0 to 25

2017 2018

Saigon River

Location trend is almost same

Big Highway Big Highway

Saigon River

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NO2 Comparison 2017-18

NO2 ppb75 ~

50 to 75

25 to 50

0 to 25

2017 2018

Compare 2018 with 2017• NO2 concentration is higher than that of 2017.

• It had not rained much in the measurement period.2NO2 + H2O → HONO + HNO3

NO2 ppb30 ~

20 to 30

10 to 20

0 to 10

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O3 Comparison 2016-18

2018

Different trend

Page 16: Creating air pollution map and analyzing traffic survey ...€¦ · Emission from motor bikes, cars, etc. Air pollutions(CO 2, NO ... • Front of VNUHCM (NVC street) • Both street

[Counting period] 7 a.m. ~ 6 p.m., for 5min / 1h

[Place]• Front of VNUHCM (NVC street)• Both street (South & North side)

Standard Heavy duty Motorbike

[Type]

Traffic count

VNUHCM

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12000Bike / Monday to South

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Bike / Monday to North

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rResult:Traffic count

◆In the morning:North > South

→to go center of city

◆In the evening:South > North

→to go home

Direction to center of city

Page 18: Creating air pollution map and analyzing traffic survey ...€¦ · Emission from motor bikes, cars, etc. Air pollutions(CO 2, NO ... • Front of VNUHCM (NVC street) • Both street

VNUHCM

Office area

Bed town

Bed town

Bed town

Bed town

Page 19: Creating air pollution map and analyzing traffic survey ...€¦ · Emission from motor bikes, cars, etc. Air pollutions(CO 2, NO ... • Front of VNUHCM (NVC street) • Both street

Conclusion

NH3: Concentration, location trend is

same to 2017.

NO2: Concentration is higher than 2017.

Location trend is similar.

O3: Concentration is lower than 2016,2017.

Location trend is opposite from last two years.

But this year,

NH3,NO2,O3 are high value in city area.

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