Masami Furuuchi

TL;DR: In Chiang Mai, the northern part of Thailand, the forest fires located upwind of the monitoring site were found to be the largest contributor while the carbon behavior at the site in Bangkok was better accounted for by the EI of provinces in central Thailand including Bangkok and its surrounding provinces, where the burning of crop residues and the cultivation of sugarcane for sugar production are significant factors.

TL;DR: In this paper, the authors describe the design and evaluation of an ambient air sampler consisting of a four-stage impactor and an inertial filter, for collecting various size fractions, including nano-particles, in a short sampling period.

TL;DR: In this paper, the degradation of polyphenylene sulfide (PPS) non-woven fabrics in HNO3, H2SO4 and HCl was investigated, and a linear relationship between the nitric acid concentration and the proportion of carbon in the remaining PPS structures after 100h of acid exposure was found.

TL;DR: For the provinces being evaluated, agricultural activities and forest fires were shown to be closely correlated to the ambient PM concentration while their contribution to the production of gaseous pollutants is much less.

TL;DR: In this article, a new concept for the utilization of fibrous filters for the classification of nanoparticles was proposed and confirmed that the filter employed in the present work can separate particles smaller than 100 nm, and the main conclusions obtained in this paper are as follows: (1) Inertial filter utilizes inertial impaction of particles and the classification performance can be predicted by the log penetration law and the single fiber collection efficiency, (2) 50% cutoff size is reduced by increasing the filtration velocity and is predicted by Stk50 = 1, (3) In