Зеленые фильтры

THE DEPARTMENT OF EDUCATION AND SCIENCE OF THE CITY OF MOSCOW

SBPEI PC NAMED AFTER P.A. OVCHINNIKOV

Green filters

Made by:

Milena Zlotnikova,

Daniil Timashkov,

Grigorii Toropin,

Yan Beloborodov

Supervisors:

Tatyana Kutentsina,

English Teacher,

Galina Lebedeva,

Biology teacher.

Relevance.

Dust in the air contains a lot of chemicals that are hazardous to health. And the more trees (the best dust collectors) are planted the cleaner the ambient air will be.

Novelty

It’s for the first time in college when we decided to investigate which trees are better than others to clean the air from the dust.

Hypothesis: broadleaf trees are the best air purifiers.

past research results

The results of the survey

2

38- yes

3

40-yes

4

32-yes

5

2-no

6

36-yes

35-yes

7

8-no

4-no

35-yes

maple

5-no

Birch tree 

1

5-no

15

chestnut

Pine

16

2

Larch

3

aspen

2

oak

1

Conclusion: groupmates know that trees are the best dust collectors, but to plant a birch or a chestnut near the college is being researched now.

Our researches

Calculation of the surface of the washed leaves by the formula:

• S = (ddm 2 ), where М1 is the mass of paper cut along the contours of 10 leaves, М2 is the mass of 1dm 2 of paper, P is the number of washed leaves.
• Then it is determined how much dust is deposited on 1 m 2 of the leaf surfaces, and then the average dust deposition rate per day (in g / sq. M per day) using the following formula:
• where M is the mass of dust, S is the surface of the washed leaves in dm 2 , t is the time of dust precipitation (for a day).

Research results

Mass of dust on the leaves

Types of trees

The weight of the sample of 10 leaves, mg

I

Poplar ordinary

II

Birch warty

500

III

American maple

300

250

Average weight (10 leaves) mg

IV

Pedunculated oak

150

425

110

Average weight

Pyramidal poplar

350

100

300

130

S , %

(1 sheet) mg

410

90

140

394

200

90

225

150

460

39,4

6,79

98

22,5

140

470

480

4,98

140

9,8

3,41

455

14

3,82

45,5

4,41

The average mass of dust retained on 1 sheet and the specific dust capacity of the studied leaves

Types of trees

Poplar ordinary

Birch warty

39,4

12

Pyramidal poplar

22,5

14

American maple

45,5

3,3

13,3

14

Pedunculated oak

1,6

146

14

3,3

54

0,1

0,2

Conclusion: as the pyramidal poplar does not fluff and picks up dust very well, it has been decided to plant it along the street of our college.

Last autumn Our proposal

CONCLUSIONS

• Pyramidal poplar has the highest average mass of dust retained per sheet.
• Pyramidal poplar has the highest specific dust holding capacity.
• From the studied trees pyramidal poplar is among the best dust collectors.

OFFERS

• To promote a system of measures to preserve and improve the ecology of the street.
• To continue air monitoring.
• To offer activities for planting trees by the method of wells.
• To implement our project.  

Let the living heart of nature always beat