A5000367939- Indoor Air Quality and Microbial Exposure
- Advanced Chemical Sensor Technologies
- Pesticide Residue Analysis and Safety
- Analytical chemistry methods development
- Air Quality and Health Impacts
- Toxic Organic Pollutants Impact
- Cryospheric studies and observations
- Pharmaceutical and Antibiotic Environmental Impacts
- Analytical Chemistry and Sensors
- Polar Research and Ecology
- Water Quality Monitoring and Analysis
- Environmental Chemistry and Analysis
- Water Quality and Pollution Assessment
- Effects and risks of endocrine disrupting chemicals
- Atmospheric chemistry and aerosols
- Air Quality Monitoring and Forecasting
- Heavy metals in environment
- Microplastics and Plastic Pollution
- Insect and Pesticide Research
- Odor and Emission Control Technologies
- Recycling and Waste Management Techniques
- Isotope Analysis in Ecology
- Radioactivity and Radon Measurements
- Chemical Safety and Risk Management
- Geology and Paleoclimatology Research
University of Shizuoka
2022-2025
Research Institute of Environment, Agriculture and Fisheries, Osaka Prefecture
2019-2024
Osaka Metropolitan University
2024
CAE (Canada)
2020
Osaka Prefecture University
2017-2018
Graduate School USA
2017
Neonicotinoid pesticides are highly hydrophilic systemic insecticides that have been extensively used worldwide. To evaluate their environmental risks, the concentrations of these in aquatic environment must be monitored. Although polar organic chemical integrative sampler (POCIS) has proved to a suitable passive for many compounds, Oasis HLB (Waters) POCIS shown limitations monitoring neonicotinoid pesticides, such as short linear uptake ranges. In present study we optimized by selecting...
The quality of chemical analysis is an important aspect passive sampling-based environmental assessments. present study reports on a proficiency testing program for the hydrophobic organic compounds in silicone and low-density polyethylene (LDPE) samplers hydrophilic polar integrative samplers. median between-laboratory coefficients variation (CVs) compound concentrations polymer phase were 33% (silicone) 38% (LDPE), similar to CVs obtained four earlier rounds this program. CV over all was...
As an alternative to cigarettes, the sales of heated tobacco products (HTPs) have increased in Japanese market. This may contribute improving a smoker's health because levels most toxic compounds─such as tobacco-specific nitrosamines (TSNAs) and volatile organic compounds (VOCs)─in mainstream HTPs are lower than those cigarettes. However, risks associated with flavors that provide attractive tastes remain unknown. We demonstrated compared reduce VOCs TSNAs while achieving comparable nicotine...
To evaluate post-depositional loss from the snow surface and subsequent redistribution of nitrate, we determined spatial variation nitrate concentrations, as well δ15N Δ17O values in snow, sampled along a latitudinal transect eastern Dronning Maud Land, East Antarctica. The NO3– concentrations ranged 40.0 to 130.8 μg L–1, showing no obvious trends with latitude, while δ15N(NO3–) increased coastal sites inland sites, ranging –19.4 165.5‰. relationship between isotopic (δ15N Δ17O) accumulation...
This study validated the chemicals monitoring ability of a polar organic chemical integrative sampler (POCIS) under non-steady-state conditions resulting from natural disasters and environmental accidents in aquatic environments via laboratory experiments. The goal this work was to contribute toward actual state contamination emergencies disasters. A chamber replicating an environment established by exposure assessment model set up clean booth. concentrations seven neonicotinoid pesticides...
Abstract Passive smoking poses a major hazard to the health of non-smokers. Cigarette combustion emits environmental tobacco smoke (ETS) that contains various pollutants, including volatile organic compounds (VOCs), polycyclic aromatic hydrocarbons, and particulate matter with particles < 2.5 μm in aerodynamic diameter (PM ). Therefore, assess risk passive smoking, it is necessary determine exposure levels ETS caused by smoking. However, difficult excluding effects other sources...
Abstract The Buriganga River plays a key role in the socioeconomic structure of Dhaka, capital Bangladesh. However, this river is severely polluted and considered one most world. Therefore, study aimed to assess concentrations various metals River. A was conducted from August 2019 February 2020 determine 16 water samples (n = 210) collected 10 distinct sites mean values for Cr, Mn, Ni, Zn, As, Se, Cd, Sb, Pb were above guideline prescribed by WHO, Japan, Moreover, fraction ratios Be, Co, Cu,...
The polycyclic aromatic hydrocarbons (PAHs) in snow were measured eastern Dronning Maud Land, East Antarctica. sources of these PAHs the mobiles and diesel electric generators used for scientific research from 29th December 2015 to 4th February 2016. Most PAH concentrations low before campaign (lower than detection limit or quantification limit), then increased due activities, finally decreased a level probably because strong blizzard winds. In addition, photolysis polluted samples under...
Polar organic chemical integrative samplers (POCIS) are promising devices for measuring the time-weighted average concentrations of hydrophilic compounds in aquatic environments. However, mechanisms underlying compound uptake by POCIS remain unclear. We investigated permeation kinetics polyethersulfone and polytetrafluoroethylene membrane filters, sorption Oasis HLB (Waters), Envi-Carb (Supelco), WAX (Waters) sorbents. The log octanol-water partition coefficient (K
Abstract Polar organic chemical integrative sampler (POCIS) devices have been suggested for measuring time‐weighted averages (TWAs) of contaminant concentrations resulting from leak accidents in aquatic environments. However, the response POCIS device emergency condition natural water remains unclear. The to fluctuation was investigated using a chamber test with tap and channel water. simulated river under scenario (maximum concentration: 1–10 μg L –1 , half‐life: 1 day). target chemicals...
Nitrate in snow is subject to post-depositional processing, which leads a net loss and redistribution within the snowpack. The relative importance of processes such as volatilization nitric acid (HNO3) photolysis nitrate has long been debated. Changes chloride concentrations snowpack were investigated at H128 (69°23.584’S, 41°33.712’E), an Antarctic coastal site approximately 100 km from Syowa Station East Antarctica December 2015 February 2016. Results indicate that migrated deeper sites...
A polar organic chemical integrative sampler (POCIS) was developed for the detection of linear alkylbenzene sulfonates (LASs), which are one most widely used chemicals globally and represent a type surfactant agent. Owing to natural disasters accidents, these LASs have potential risk leak into aquatic environments at high concentrations, thus far, passive sampling methods not yet been applied in their as, being sorptive compound, they do easily permeate membrane samplers. In present study,...
A polar organic chemical integrative sampler (POCIS) was developed for the detection of linear alkylbenzene sulfonates (LASs), which are one most widely used chemicals globally and represent a type surfactant agent. In present study, LASs were significantly sorbed onto polyethersulfonate (PES) membrane, suggesting that less sorptive polytetrafluoroethylene (PTFE) membrane is suitable application in POCIS device. Calibration experiments showed device with Oasis WAX as sorbent PTFE filter had...