scholarly journals Microplastic Pollution in the Ambient Air of Surabaya, Indonesia

2019 ◽  
Vol 14 (2) ◽  
pp. 290-298 ◽  
Author(s):  
Arie Dipareza Syafei ◽  
Nurul Rizki Nurasrin ◽  
Abdu Fadli Assomadi ◽  
Rachmat Boedisantoso
Keyword(s):  
Ambient Air ◽  
Traffic Volume ◽  
Vacuum Pump ◽  
Aquatic Environments ◽  
Air Samples ◽  
Dust Emissions ◽  
Digital Microscope ◽  
Land Surfaces ◽  
High Traffic Volume ◽  
Roadside Area

Microplastics are plastic particles less than 5 mm in length. Microplastics in the air can be ingested and inhaled by humans. In this work, three sites in a roadside area were investigated for microplastics. Air samples were obtained by sucking air at these three sites into a stainless steel funnel with a vacuum pump. The air went through a filter media to retain any particles, which were then collected and observed with a digital microscope and Fourier Transform Infrared (FTIR) testing. A diversity of microplastic shapes were identified at the sites, including fibres, fragments and films. Pellets were not found at any sites, and fibre was the dominant microplastic shape. The highest microplastic was found in the study site with high traffic volume than at sites with low traffic volume. Microplastic on Urip Sumoharjo street (225,087 units/day) as many as 174.97 particles/m3 and 130.50 particles/m3, Mayjend Sungkono street (132,066 units/day) as many as 131.75 particles/m3 and 68.36 particles/m3, and Embong Malang street (98,017 units/day) as much 94.69 particles/m3 and 55.93 particles/m3. Microplastics from different polymers, such as polyethene terephthalate (PET), polyester and cellophane, were identified. Thus, dust emissions and depositions in the air, on land surfaces, and in aquatic environments are associated with microplastic transportation.

Electron Microscopic Characterization and Quantitation of Air Borne Particulate Matter with Special Emphasis on Asbestos

1972 ◽  
Vol 30 ◽  
pp. 356-357
Author(s):  
Peter K. Mueller ◽  
Glenn R. Smith ◽  
Leslie M Carpenter ◽  
Ronald L. Stanley
Keyword(s):  
Electron Microscopy ◽  
Light And Electron Microscopy ◽  
Ambient Air ◽  
Quality Standard ◽  
Primary Objective ◽  
Cellulose Ester ◽  
Main Concept ◽  
Electron Microscopic ◽  
Air Samples ◽  
Diffraction Patterns

At the present time the primary objective of the electron microscopy group of the Air and Industrial Hygiene Laboratory is the development of a method suitable for use in establishing an air quality standard for asbestos in ambient air and for use in its surveillance. The main concept and thrust of our approach for the development of this method is to obtain a true picture of fiber occurrence as a function of particle size and asbestos type utilizing light and electron microscopy.We have now available an electron micrographic atlas of all asbestos types including selected area diffraction patterns and examples of fibers isolated from air samples. Several alternative approaches for measuring asbestos in ambient air have been developed and/or evaluated. Our experiences in this regard will be described. The most promising method involves: 1) taking air samples on cellulose ester membrane filters with a nominal pore size of 0.8 micron; 2) ashing in a low temperature oxygen plasma for several hours;

scholarly journals Polybrominated diphenyl ethers (PBDEs) in ambient air samples at the electronic waste (e-waste) reclamation site

2019 ◽  
Vol 1 (1) ◽  
pp. 79-89 ◽  
Author(s):  
Ajit Ghimire ◽  
Albert Leo N. dela Cruz ◽  
Roberto Wong ◽  
Panida Navasumrit ◽  
Stephania Cormier ◽  
...  
Keyword(s):  
Polybrominated Diphenyl Ethers ◽  
Electronic Waste ◽  
Ambient Air ◽  
Air Samples ◽  
Diphenyl Ethers ◽  
Waste Reclamation

In the vicinity of a rendering plant it is very difficult to find a really unpolluted place for the olfactometric measurements. Although the most unpolluted site luff of the plant was chosen, another precaution was taken. As adaption of the panelists to the plant odour could cause one of the greatest errors, some minutes before and during the measurement the panelists inhale solely odourless air from the olfactometer. To prevent discomfort by inhaling completely dry air, the olfactometer Modell 1158 is supplied with a moistening device, fig. 1. Fig. 1. Moistening device. In a standard impinger, filled with destillated water, air is moistened close to saturation. An equal flow of moistened air is mixed to the olfactometer outlet, thus delivering to the panelist a rel. moisture content of nearly 50 %. The panel consisted of 4 persons. The samples are prediluted taken into plastic bags, simultaneously at the inlet (raw air) and at the outlet (cleaned air) of the air cleaners. To receive an unfalsified sample from the outlet of the biofilters, undiluted by ambient air, a "tent” of plastic foil, fig. 2, is placed on the filter surface. The cleaned air blows up the tent and escapes through the sample hole, large enough to prevent a significant increase of pressure. The form of the upblown tent indicates, wether a sample area with normal air flow is chosen, and over the space of the covered filter area of 6,25m2 an average sample is received. Fig. 2. Device for cleaned air samples from biofilter outlet.

1986 ◽  
pp. 238-238
Keyword(s):  
Ambient Air ◽  
Air Samples ◽  
Dry Air ◽  
Filter Surface ◽  
Plastic Bags ◽  
Plastic Foil ◽  
Air Cleaners ◽  
Unpolluted Site ◽  
Filter Area ◽  
To Receive

scholarly journals PENGARUH KEMACETAN DI SIMPANG SABILILLAH TERHADAP IMPLEMENTASI CITRA LALU LINTAS DI SIMPANG PROGRESIF

2015 ◽  
Vol 9 (2) ◽  
pp. 114
Author(s):  
Supiyono, Dwi Ratnaningsih, Rudy Ariyanto
Keyword(s):  
Road Traffic ◽  
Flame Length ◽  
Traffic Volume ◽  
Signalized Intersections ◽  
Degree Of Saturation ◽  
The Road ◽  
Road Section ◽  
On The Road ◽  
High Traffic Volume

Progress of a country in line with the progress of traffic (transport). Fluency in traffic is determined by the smoothness of traffic on the road. Problems often arise on the highway is congestion at the intersection. Neither was signalized intersections and signalized intersections. Problems at the intersection is less accuracy green flame at the intersection with the number of vehicles in a segment. A road with high traffic volume vehicle green flame low while other road traffic volume small green flame length. So in a long queue roads, while other roads are deserted while still green flame.     This study aims to minimize the occurrence of conflic at the intersection of green flame. Research will make iterations in the intersection, where a road section which will be nominated densely green flame, the flame of the green according to the volume of traffic on these roads. Each road will be a green flame in accordance with the volume of traffic, without having to change any program there is a change in traffic volume.The degree of saturation of the calculation obtained by ....Keywords: roads, hight traffic, progressive intersection, degree saturation

Tracing the sources of PCDD/Fs in Baltic Sea air by using metals as source markers

2018 ◽  
Vol 20 (3) ◽  
pp. 544-552 ◽  
Author(s):  
Anteneh Assefa ◽  
Mats Tysklind ◽  
Jana Klanova ◽  
Karin Wiberg
Keyword(s):  
Baltic Sea ◽  
Ambient Air ◽  
Air Mass ◽  
Back Trajectories ◽  
Air Samples ◽  
Metal Source ◽  
Source Markers

A combination of PCDD/F patterns and metal source markers in ambient air samples together with stable air mass back trajectories can reveal the most significant atmospheric sources of PCDD/Fs.

scholarly journals Atmospheric Chemistry, Sources, and Sinks of Carbon Suboxide, C<sub>3</sub>O<sub>2</sub>

2017 ◽  
Author(s):  
Stephan Keßel ◽  
David Cabrera-Perez ◽  
Abraham Horowitz ◽  
Patrick R. Veres ◽  
Rolf Sander ◽  
...  
Keyword(s):  
Atmospheric Chemistry ◽  
Relative Rate ◽  
Ambient Air ◽  
Rate Coefficients ◽  
Oh Radicals ◽  
Carbon Suboxide ◽  
Air Samples ◽  
Sources And Sinks

Abstract. Carbon suboxide, O = C = C = C = O, has been detected in ambient air samples and has the potential to be a noxious pollutant and oxidant precursor; however, its lifetime and fate in the atmosphere is largely unknown. In this work, we collect an extensive set of studies on the atmospheric chemistry of C3O2. Rate coefficients for the reactions of C3O2 with OH radicals and ozone were determined using relative rate techniques as k4 = (2.6 ± 0.5) × 10−12 cm3 molecule−1 s1 at 295 K (independent of pressure between ~ 25 and 1000 mbar) and k6 

Analysis of genotoxic effects on plants exposed to high traffic volume in urban crossing intersections

Chemosphere ◽  
2020 ◽  
Vol 259 ◽  
pp. 127511
Author(s):  
Carlos Fernando Campos ◽  
Matheus Campos Cunha ◽  
Vanessa Santana Vieira Santos ◽  
Edimar Olegário de Campos Júnior ◽  
Ana Maria Bonetti ◽  
...  
Keyword(s):  
Traffic Volume ◽  
Genotoxic Effects ◽  
High Traffic Volume

Occupational exposure to mercury vapor in a compact fluorescent lamp factory: Evaluation of personal, ambient air, and biological monitoring

2019 ◽  
Vol 35 (4) ◽  
pp. 304-313 ◽  
Author(s):  
Ebrahim Darvishi ◽  
Mohammad Javad Assari ◽  
Maryam Farhadian ◽  
Ebrahim Chavoshi ◽  
Hamid Reza Ehsani
Keyword(s):  
Occupational Exposure ◽  
Light Emitting Diode ◽  
Mercury Level ◽  
Mercury Vapor ◽  
Ambient Air ◽  
Cross Sectional Study ◽  
Cross Sectional ◽  
Air Samples ◽  
The Mean ◽  
Occupational Exposure To Mercury

Compact fluorescent lamps (CFLs) have become a popular lighting choice in recent years despite the good performance of light-emitting diode (LED) lamps. The CFLs that have been produced recently contain 1.5–3.5 mg Hg/lamp. There is evidence that even low doses of mercury are toxic. This study aimed to assess occupational exposure to mercury vapor in workers of a CFLs factory by determining mercury levels in personal and ambient air samples and urine of workers. This cross-sectional study was conducted on 59 workers in a CFLs factory in Iran. Personal and ambient air sampling of mercury vapor levels (MVLs) was performed during a workday. In total, 10 personal samples and 10 ambient air samples of mercury vapor were collected simultaneously from different units of the factory. Urine samples were collected before the work shift. Samples were analyzed using a cold-vapor atomic absorption spectrophotometer (CVAAS). The mean of the MVLs in the personal and ambient air samples was 14.78 ± 5.76 and 67.10 ± 59.37 µg.m−3, respectively. The highest MVL was measured for the production line supervisor (25 µg.m−3). There was a significant correlation between the MVLs in the ambient air and personal samples ( r = 0.84, p = 0.005). The mean urinary mercury level (UML) was 13.85 ± 13.14 µg/g creatinine. The UML of 86.4% workers was below the 20 µg/g creatinine recommended by the Centre of Environmental and Occupational Health in Iran. There were significant differences between the UMLs in different areas of the factory ( p = 0.041). Lamp breakage was an important determinant of exposure to mercury vapor; hence, effective programs to control mercury vapor are essential in the CFLs industry.

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