Tag Archives: Measurement

Crowdfunding: Aerosol Research Using Mt. Fuji. 富士山頂の測候所

A “message” from Waseda University (Profs. Okochi and Shimada)back3

クラウドファンディング
富士山頂の測候所から、大気汚染物質の広がりの謎にせまる!

Visited Central Research Institute of Electric Power Industry. 【見学】電力中央研究所

18 Dec. 2015
After a lunch time (Turkish food) around Kamakura station; we (12 students) visited Central Research Institute of Electric Power Industry (電力中央研究所) in Yokosuka city (Kanagawa prefecture).

Since 2008, some of lab’s members have been collaborating with CRIEPI on measuring particulate matters (PM) at the exhaust of coal-based power plant.

Thanks to Noda san, Shimizu san, and Makino san for our study tour.

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Joint Seminar with School of Agriculture Labs 農学府の研究室と合同セミナー

IMG_075014 Dec. 2015:
Two of our students have presented their studies at a joint seminar with Hatakeyama Lab and Matsuda Lab.

Place: FM Tama Kyuryo (Matsuda Lab)

More than four students have also visited FM Tama Kyuryo (an experimental “forest” of TUAT sites) in November 2015, for the rain water samples.

fm-tama-TUAT

PAPER: Charge of Particle by Kelvin Probe Force Microscopy. ケルビンフォース顕微鏡で粒子の帯電を計測

Other “intro” of papers from our lab >> /tag/paper/


okuda-gunji2015

A collaborated study with Dr. Okuda group at Keio University. エアロゾル研究 Vol. 30 (2015) No. 3 p. 190-197 (Journal of Aerosol Research) doi.org/ | ResearchGate

Kelvin Probe Force Microscopyを用いたエアロゾル個別粒子の帯電状態の測定
Measurement of the Electrostatic Charging State of Individual Particles in Ambient Aerosol Using Kelvin Probe Force Microscopy (Okuda, Gunji, Lenggoro)

 

呼吸により人体に入る微粒子に関する課題において、微粒子の帯電状態が注目されるようになった。本研究では大気中に浮遊する微粒子の帯電状態を評価できる新たな手法を考案した。大気環境中から捕集された微粒子の表面電位を測定し、その微粒子の電荷素量が4以上であることが明らかになった。今後は化学組成と帯電状態との関係を検討していく必要も考えられる。

2016-award-okuda-gunji-lenggoro2
An award from JAAST (Industry consortium) related to this study (Okuda/Gunji/Lenggoro)

Recently, the importance of electrostatic charging state to particle deposition in the human airways has been suggested. We developed a measurement method of electrostatic charging state of individual ambient aerosol particles using Kelvin probe force microscopy (KPFM). For the ambient aerosol particles, the surface potential ranged from-56.6 mV to+156.7 mV, indicating that the number of elementary charges of ambient aerosol particles analyzed in this study was more than 4.

Recent journal articles from our group.研究室から発表した(最近の)論文
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BEST PAPER AWARD at International Conference (PURE 2015, Malaysia)最優秀論文賞

OPE

11 Nov. 2015. BEST PAPER AWARD, 2nd International Conference on Purity, Utility Reaction and Environmental Research (PURE 2015), Kuala Lumpur.12265664_1658963404361849_7010463302459411147_o
“Development of a battery-driven passive sampling system for electrostatically trapping atmospheric particles”
(M. P. Khairunnisa, F. Faizal, H. Fukushima, M. Gen, P. Widiatmoko, I. W. Lenggoro*)

award201511-nisa-malaysiaaward201511-nisa-malaysia-paper

(乾電池を用いた高電圧変換器を駆使し、携帯性に優れた、大気中微粒子捕集器の開発):各地のPM2.5またはPM1.0の解析に役にたつ

Full paper : Journal of Purity, Utility Reaction and Environment, 5(2), 43-50 (2016.Apr)

Open Access:

Nisa-award-JAASTYoung2015

The related study was also honored as BEST POSTER AWARD during 12th Forum of Young Association of JAAST (Japan Association of Aerosol Science and Technology) 第12回エアロゾル若手フォーラム 2015/10/14 (Keio Univ.)

“A battery- and electrostatic-driven system for sampling suspended particles on a substrate”
(M. P. Khairunnisa, Ferry Faizal, Hisako Fukushima, Masao Gen*, Pramujo Widiatmoko**, I. Wuled Lenggoro)
Tokyo University of Agriculture and Technology; *Tohoku University; **Institut Teknologi Bandung.

研究室のこれまで:受賞歴.AWARD

PAPER: Charge of particles (PM2.5) collected in filter, 捕集された大気粒子の帯電状態

Other “intro” of papers from our lab >> /tag/paper/AJAE-cover


Preliminary study on the measurement of the electrostatic charging state of PM2.5 collected on filter media, 
実環境中のPM2.5(粒子状物質)をフィルター状で捕集したあとに帯電状態を調べた。「帯電」は、PMによる健康への影響を理解するために重要な情報。捕集されたPM2.5は75~87%が負に帯電されたことがわかった。

共同研究の成果 Collaborated between:
* Keio Univ: Okuda (Prof.), and graduate students (Yoshida, Gunji, Okahisa) and
* Tokyo Univ. of Agr. & Tech.: Kusdianto (Doctoral-student), Gen (Doctoral-student), Sato (Master-student), Lenggoro (Prof.)

keio-collected-tuat-measured
Schematic of experiments

Asian Journal of Atmospheric Environment (2015) 9(2):105-113 … more…
Continue reading PAPER: Charge of particles (PM2.5) collected in filter, 捕集された大気粒子の帯電状態

2013 Kanji Takahashi Award for our paper, 高橋幹二賞

2013 Kanji Takahashi Award

2013 Kanji Takahashi Award (from Japan Association of Aerosol Science and Technology) for our paper published in 2011:
Measurement of Model Aerosols Containing Two Metal Components Formed via Cooling and Dilution Routes, Authors: Naoya HAMA, Yukie TAKASHIMA, Masao GEN, Mayumi TSUKADA, Hidehiro KAMIYA and Wuled LENGGORO*
Journal of Aerosol Research, エアロゾル研究, 26, 277-285 (2011)

For full article/PDF = jstage, Or from: researchgate.net

In 2010-2011, Hama (濱) was doctoral student; Takashima (高島) was master student; Gen(玄)was master student (in 2011 became doctoral student); Dr. Tsukada and Prof. Kamiya are our “strong” collaborators.

火力発電所等の燃焼過程における粒子生成を実験室内で模擬した。モデル混合排気ガスには軽金属(アルカリ)と重金属系の粉末の昇華を用いて、その後の希釈(冷却)と凝縮による粒子化の挙動を計測した研究。火力発電所や室内等の「燃焼の場」における捕集技術の高度化に役に立つ。

Thermal Fluid Analysis by Numerical simulation

The emission of alkali (“light-metals”) and heavy metals in combustion processes is an important contributor to environmental load. We investigated experimentally in the laboratory the generation of particles from model exhaust gases derived from NaCl and CdCl2. An on-line gas-phase measurement system showed that the mean diameters of aerosol particles derived from the evaporation of NaCl and CdCl2 were 35 and 30 nm, respectively, when the dilution ratio of the model gas was 1:20. The value was 50 nm in two-metal co-evaporation (NaCl and CdCl2). These results may be informative for predicting the phenomena related to gas-to-particle conversion at the exit of stationary emission sources.

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Our recent topics << 最近の発表論文概要.
Research areas << 研究領域

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