Title: | "Ambient volatile organic compounds in tropical environments: Potential sources, composition and impacts - A review" |
Author(s): | Mohd Hanif N; Limi Hawari NSS; Othman M; Abd Hamid HH; Ahamad F; Uning R; Ooi MCG; Wahab MIA; Sahani M; Latif MT; |
Address: | "Department of Earth Sciences and Environment, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, 43600, Bangi, Selangor, Malaysia. Electronic address: norfazrin@ukm.edu.my. Department of Earth Sciences and Environment, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, 43600, Bangi, Selangor, Malaysia. Institute for Environment and Development (LESTARI), Universiti Kebangsaan Malaysia, 43600, Bangi, Selangor, Malaysia. AQ Expert Solutions, Jalan Dato Muda Linggi, Seremban, 70100, Negeri Sembilan, Malaysia. Institute of Oceanography and Environment, Universiti Malaysia Terengganu, 21030, Kuala Nerus, Terengganu, Malaysia. Institute of Climate Change, Universiti Kebangsaan Malaysia, 43600, Bangi, Selangor, Malaysia. Environmental Health and Industrial Safety Program, Center for Health and Applied Sciences, Faculty of Health Sciences, Universiti Kebangsaan Malaysia, Kuala Lumpur, 50300, Malaysia" |
DOI: | 10.1016/j.chemosphere.2021.131355 |
ISSN/ISBN: | 1879-1298 (Electronic) 0045-6535 (Linking) |
Abstract: | "Volatile organic compounds (VOCs) are widely recognized to affect the environment and human health. This review provides a comprehensive presentation of the types and levels of VOCs, their sources and potential effects on human health and the environment based on past and current observations made at tropical sites. Isoprene was found to be the dominant biogenic VOC in the tropics. Tropical broad leaf evergreen trees are the main emitters of isoprene, making up more than 70% of the total emissions. The VOCs found in the tropical remote marine atmosphere included isoprene (>100 ppt), dimethyl sulfide (=100 ppt) and halocarbons, i.e. bromoform (=8.4 ppt), dibromomethane (=2.7 ppt) and dibromochloromethane (=1.6 ppt). VOCs such as benzene, toluene, ethylbenzene and xylene (BTEX) are the most monitored anthropogenic VOCs and are present mainly due to motor vehicles emissions. Additionally, biomass burning contributes to anthropogenic VOCs, especially high molecular weight VOCs, e.g. methanol and acetonitrile. The relative contributions of VOC species to ozone are determined through the level of the Ozone Formation Potential (OFP) of different species. Emissions of VOCs (e.g. very short-lived halogenated gases) in the tropics are capable of contributing to stratospheric ozone depletion. BTEX has been identified as the main types of VOCs that are associated with the cancer risk in urban areas in tropical regions. Finally, future studies related to VOCs in the tropics and their associated health risks are needed to address these concerns" |
Keywords: | *Air Pollutants/analysis China Environmental Monitoring Humans *Ozone/analysis Toluene/analysis *Volatile Organic Compounds/analysis Anthropogenic VOC Btex Biogenic VOC Tropical environments Voc; |
Notes: | "MedlineMohd Hanif, Norfazrin Limi Hawari, Nor Syamimi Sufiera Othman, Murnira Abd Hamid, Haris Hafizal Ahamad, Fatimah Uning, Royston Ooi, Maggie Chel Gee Wahab, Muhammad Ikram A Sahani, Mazrura Latif, Mohd Talib eng Review England 2021/10/30 Chemosphere. 2021 Dec; 285:131355. doi: 10.1016/j.chemosphere.2021.131355. Epub 2021 Jun 30" |