
Md Firoz KhanAlcorn State University · Department of Chemistry and Physics
Md Firoz Khan
PhD
About
189
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Introduction
Interested in air pollution and risk estimation from pollutants-health interaction. Open for future project discussion and collaboration at mdfiroz.khan@gmail.com.
Additional affiliations
January 2022 - February 2024
October 2019 - September 2022
December 2018 - present
Education
Publications
Publications (189)
A comprehensive assessment of PM2.5 compositions during the Southeast Asian dry season is presented. Samples of PM2.5 were collected between 24 June and 14 September 2014 using a high volume sampler. Water-soluble ions (WSI), trace species, rare earth elements (REE), and a range of elemental and organic carbon (EC, OC) were analysed. The characteri...
Exposure to fine particulate bound toxic metals in ambient air poses adverse effects to human. This study aims to determine the spatial variability in heavy metals in PM2.5 samples, for identifying their potential sources and to perform the health risk modelling. PM2.5 samples were collected using high volume sampler (HVS) on 24 h basis from three...
Carbonaceous aerosols play a key role in climate modification and exert a deleterious effect on human health. Thus, this study aimed to determine the thermally derived carbonaceous fraction in particulate matter (PM)2.5 from the Southern Malay Peninsula, a tropical area in Malaysia, during January 2019 to March 2019. PM2.5 was captured on quartz fi...
Atmospheric aerosols and nitrogen dioxide (NO2) are a global concern, especially in major Asian cities, because of their multiple impacts on climate, health, ecology, and the environment. Although many studies have been conducted individually, studies on the coupling of NO2 and Aerosol optical depth (AOD) in major Asian cities are still scarce. Thi...
Formaldehyde (HCHO), a precursor to tropospheric ozone, is an important tracer of volatile organic compounds (VOCs) in the atmosphere. Two years (2019–2020) of HCHO simulations obtained from the global chemistry transport model CHASER at a horizontal resolution of 2.8° × 2.8° have been evaluated using the Tropospheric Monitoring Instrument (TROPOMI...
Editorial on the Research Topic: Crucial air quality, atmospheric environment, and climate change in lowand middle-income countries
Apart from homes, daycare centers (DCCs) serve as essential indoor environments for children. The objective of this study was to investigate the correlation between IAQ and respiratory health implications in children and to identify patterns in IAQ using chemometric analysis. A total of 100 children aged 4 to 6 from 5 urban DCCs in Petaling Jaya, S...
Models suggest that biomass burning causes thousands of premature deaths annually in Southeast Asia due to excessive exposure to particulate matter (PM) in smoke. However, measurements of surface air quality are sparse across the region, and consequently estimates for the public health impacts of seasonal biomass burning, are not well constrained....
This book is based on the accepted papers for presentation at the 2nd MedGU Annual Meeting, Marrakesh 2022. The book presents a series of newest research studies that are nowadays relevant to Middle East, Mediterranean region, Africa, and surrounding areas. The book gives a general overview on current research, focusing on geoenvironmental issues a...
Air pollution has been creating severe environmental crises in Dhaka. This city ranks at the top among the major cities of the world. A multidimensional study is needed to assess the severity of this crisis. This study aims to determine the sources of trace elements in PM2.5 and their effects on health. We measured concentrations of 15 trace elemen...
The emission sources of fine particulate matter (PM 2.5 ) have not yet been fully identified in Ho Chi Minh City (HCMC), Vietnam, presenting difficulties to authorities in controlling air pollution efficiently. To address this issue, this study explores the source apportionment of PM 2.5 by the positive matrix factorization (PMF) model and identifi...
This study aims to assess the Indoor Air Quality (IAQ) inside a one-room apartment of about 240 square feet in the Henveiru district in Male', Maldives. Concentrations of Particulate Matter (PM 2.5), one of the most detrimental air pollutants, were measured every 15 minutes from 10-09-2021 to 18-12-2021 using low-cost PM BlueSky sensors inside the...
In Bangladesh, particularly in Dhaka, gridlock in the transportation network is such a typical occurrence that it is critical to have a thorough understanding of the magnitude of carcinogenic airborne toxins like polycyclic aromatic hydrocarbons (PAHs) along the city’s busy streets. In this study, we investigated the airway deposition of PM2.5- and...
Dr. Firoz Khan, Associate Professor, the Department of Environmental Science and Management, North South University talks about Air Pollution in SIPG 5 Minutes Talk #6
Formaldehyde (HCHO), a precursor to tropospheric ozone, is an important tracer of volatile organic compounds (VOCs) in the atmosphere. Two years of HCHO simulations obtained from the global chemistry transport model CHASER at horizontal resolution of 2.8° × 2.8° have been evaluated using observations from the Tropospheric Ozone Monitoring Experimen...
This study estimates the radiative forcing by biomass burning and dust aerosols over the Indian subcontinent, with emphasis on the Indo-Gangetic Plains (IGP) during the period from January 2021 to April 2021, based on multiple satellite and reanalysis datasets. In this respect, we used retrievals from the Moderate Resolution Spectroradiometer (MODI...
Polycyclic aromatic hydrocarbons (PAHs) are persistent organic pollutants (POPs) found in the environment, posing significant health concerns for the population. This research aimed to assess the PAH levels in road dust near bus stops, identify their sources, and evaluate potential health risks. The analysis involved the use of a gas chromatography...
Countries in South Asia and Southeast Asia are experiencing severe air pollution problems. Most countries lack technical capabilities and adequate air quality management (AQM) infrastructure. A capacity building workshop on AQM was organised from 19-23 September 2022 for countries in South Asia and Southeast Asia. A total of 17 countries (eight in...
Models suggest that biomass burning causes thousands of premature deaths annually in Southeast Asia due to excessive exposure to particulate matter (PM) in smoke. However, measurements of surface air quality are sparse across the region, and consequently estimates for the public health impacts of seasonal biomass burning are not well constrained. W...
The main topic of interest for this special issue includes but is not limited to the following: a) Characterization of nano/micro-and macro plastics pollution in different environments including biota b) Sources, fate, and health effects of macro/micro and nano plastics c) Transformation and transport of plastics d) The development of innovative te...
Industrial areas are typically associated with hazardous levels of air pollution to human health and the environment. The growing number of factories in the area poses an ever-greater threat to the surrounding communities. One of the several incidents pointing to poor air quality in the industrial region is the severe air pollution incident that oc...
Polycyclic aromatic hydrocarbons (PAHs) in the atmospheric particles constitute a topic of growing health concern. This study aims to calculate PAH concentrations, identify the source, assess the health risk from exposure to carcinogenic PAHs, and the respiratory deposition flux. PM10 and PM2.5 were collected in September 2019 in the urban, semi-ur...
A Special Issue named “Observation and Management of Aerosols and Gaseous Air Pollution” has been proposed to launch soon under the journal Sustainability. The Issue will broadly but precisely cover the topic of interest in aerosol and volatile compositions in air pollution. Aerosols, their compositions, and volatile gases appropriately indicate th...
Due to rapid urbanization and fast economic development, aerosol pollution is a serious environmental issue, especially in Bangladesh. Based on bioaccessibility and respiratory deposition doses (RDD), health risks of PM2.5 and PM10 bound 15 (fifteen) metals were investigated at fourteen urban sites (roadside, marketplace, industrial, and commercial...
Atmospheric aerosols affect human health, alter cloud optical properties, influence the climate and radiative balance, and contribute to the cooling of the atmosphere. Aerosol climatology based on aerosol robotic network (AERONET) and ozone monitoring instrument (OMI) data from two locations (Urban Dhaka and coastal Bhola Island) over Bangladesh wa...
This study explored the potential of functionalized nanoparticles with active compounds extracted from tropical fruit wastes to increase the performance of turbidity removal from the water of natural coagulants. Extracts from banana, durian, and jackfruit wastes (peel and seed) were tested for their coagulation activity. Banana peel extract had the...
This study aims to determine the concentrations of the trace metals (TM) and water soluble inorganic ions (WSII) of the PM2.5 pollutant collected in the suburban industrial-residential airshed during the southwest (SW), inter-monsoon (IM) and northeast (NE) monsoons in Skudai, Johor Bahru. The PM2.5 samples were collected using the MiniVol™ portabl...
THIS BOOK:
- Enhances the understanding of climate, paleoclimate, and paleoenvironmental changes in Europe, America, Africa, Middle East, and Asia, but mainly focuses on the Mediterranean environment and surrounding regions.
- Provides new insights on sustainable water characterization, evaluation, management, and protection.
- Includes case studi...
A school environment with good indoor air quality contributes to the children's performance and learning efficacy. This study aims to determine indoor and outdoor PM2.5 concentrations in school environments and its possible sources and exposure levels. Daily measurements of PM2.5 samples were collected for 24 h using low volume samplers from 19 pri...
Good indoor air quality (IAQ) is essential to ensure students’ and teachers’ improved performance and productivity. This study aimed to investigate particulate matter (PM) concentration with different sizes in a classroom during haze episode and to evaluate the health effect of air pollution during haze to the school student in Malaysia. The partic...
This study aims to examine the relationship between daily temperature and mortality in the Klang Valley, Malaysia, over the period 2006–2015. A quasi-Poisson generalized linear model combined with a distributed lag non-linear model (DLNM) was used to estimate the association between the mean temperature and mortality categories (natural n=69,542, c...
Nowadays, due to population growth and industrialisation, air quality in Malaysia is becoming a critical threat. Air pollution has become a serious issue due to its impacts on humans, animals, and the environment. Malaysia experienced air quality deterioration in 2019 when the episodes of haze happened from July to September. It was due to the loca...
Surface sediments along the Southern Terengganu coast (≤7 km from the coast) were analyzed for polycyclic aromatic hydrocarbons (PAHs). The concentrations of 16 USEPA priority polycyclic aromatic hydrocarbons (ΣPAH16) ranged from 2.59 to 155 ng g⁻¹ and their respective alkylated ranged between 8.80 and 24.90 ng g⁻¹. Traces of acephenanthrylene, ben...
Good indoor air quality in school environment is crucial for teaching and learning processes, as well as student development. This study aims to identify the composition of PM2.5 and the main sources of it which influence the indoor and outdoor school environment. The PM2.5 sampling was conducted using a portable low volume air sampler and took pla...
The smaller particles that dominate the particle number concentration (PNC) in the ambient air only contribute to a small percentage of particulate matter (PM) mass concentration although present in high particle number concentration. These small particles may be neglected upon assessing the health impacts of the PM. Hence, the knowledge on the par...
The research intended to find the atmospheric concentrations, sources, and health risks of 16 particle-phase polycyclic aromatic hydrocarbons (PAHs) at the Indo Gangetic Plain (IGP) outflow location for the first time. A total of thirty-six samples of total suspended particulate (TSP) matters were collected with a low volume sampler on quartz filte...
This study aims to evaluate the variation of PM2.5 components as well as to identify PM2.5 sources under non-hazy weather conditions in a tropical urban city, Petaling Jaya, Malaysia. The non-hazy weather conditions were characterized by copious rainfall throughout the year and ephemeral dry periods, with no significant haze events. The PM2.5 conce...
Air quality in the Maritime Continent, which worsens particularly during peatland fire periods, causes climate and environmental concerns. The occurrence of peatland fire haze has been related to the interannual variations of the El Niño‐Southern Oscillation, Indian Ocean Dipole, and inter‐seasonal monsoon cycle. However, the factors affecting the...
Black carbon (BC) is of concern due to its contribution to poor air quality and its adverse effects human health. We carried out the first real-time monitoring of BC in Malaysia using an AE33 Aethalometer. Measurements were conducted between 1 January and 31 May 2020 in a university area in a suburban location of the Klang Valley. The measurement p...
With increasing interest in understanding the contribution of secondary organic aerosol (SOA) to particulate air pollution in urban areas, an exploratory study was carried out to determine levels of carbonaceous aerosols and polycyclic aromatic hydrocarbons (PAHs) in the city of Kuala Lumpur, Malaysia. PM2.5 samples were collected using a high-volu...
Metal contaminations in commercial fish have become a great public health concern worldwide including Bangladesh. The current study was conducted to provide preliminary evidence of nine metals in three commercially significant fish namely Pampus argenteus, Sardinella longiceps and Tenualosa ilisha collected from four coastal stations- Kuakata, Path...
The study was conducted to provide baseline information on nine trace elements in three commercially significant fish species (Pampus argenteus, Sardinella longiceps, and Tenualosa ilisha) collected from four stations of coastal areas and five rivers of Bangladesh. The concentrations of Pb and Cd in most of the stations exceeded the maximum recomme...
This study aims to examine the relationship between daily temperature and mortality in the Klang Valley, Malaysia over the period 2006 – 2015. A quasi-Poisson generalized linear model combined with a distributed lag non-linear model (DLNM) was used to estimate the association between mean temperature and mortality categories (natural, cardiovascula...
Polychlorinated dibenzo-p-dioxins (PCDDs) and polychlorinated dibenzofurans (PCDFs) are toxic compounds derived from anthropogenic sources that stay in the environment for long periods. Ambient air has become the most important pathway for the transfer of PCDDs/PCDFs from emission sources to the environment. This review intends to summarise the inf...
Meteorology over coastal region is a driving factor to the concentration of air particles and reactive gases. This study aims to conduct a research to determine the level of year-round air particles and the interaction of the meteorological driving factors with the particle number and mass in 2018, which is moderately influenced by Southeast Asian...
Aerosol climatology during typical haze dominating period over South and Southeast Asia was explored using several Earth‐Observing A‐Train satellite products retrieved in between 2010 and 2020. Comparatively high aerosol optical depth (AOD) with dominance of fine and UV‐absorbing aerosols are noted across the Indo‐Gangetic plain, South Asia (IGP; A...
Mainland and maritime Southeast Asia is home to more than 655 million people, representing nearly 10 % of the global population. The dry season in this region is typically associated with intense biomass burning activity, which leads to a significant increase in surface air pollutants that are harmful to human health, including ozone (O3). Latitude...
With increasing interest in understanding contribution of secondary organic aerosol (SOA) to particulate air pollution in urban areas, an exploratory study was carried out to determine levels of carbonaceous aerosols and polycyclic aromatic hydrocarbons (PAHs) in the City of Kuala Lumpur, Malaysia. PM2.5 samples were collected using a high-volume s...
Size-segregated airborne fine (PM2.1) and coarse (PM>2.1) particulates were measured in an urban environment over central Indo-Gangetic plain in between 2015 and 2018 to get insights into its nature, chemistry and sources. Mean (±1σ) concentration of PM2.1 was 98(±76)µgm-3 with a seasonal high during winter (DJF, 162±71µgm-3) compared to pre-monsoo...
During the COVID-19 pandemic, key policies aimed at reducing exposure to the virus from social distancing, restrictions on travel through to strongly enforced lockdowns. However, COVID-19 restrictions required people to spend more time at home so the exposure to air pollutants shifted to being derived from that of domestic interiors, rather than ou...
Mainland and maritime Southeast Asia are home to more than 655 million people, representing nearly 10 % of the global population. The dry season in this region is typically associated with intense biomass burning activity, which leads to a significant increase in surface air pollutants that are harmful to human health, including ozone (O3). Latitud...