Details
| Original language | English |
|---|---|
| Article number | 114294 |
| Journal | Journal of Environmental Management |
| Volume | 304 |
| Early online date | 15 Dec 2021 |
| Publication status | Published - 15 Feb 2022 |
Abstract
On-site open burning is a common practice for handling rice straw, but its negative impacts, e.g., biomass loss and air pollution, are largely debated worldwide. To address the negative effects of open burning, many efforts have been made to ‘ignite’ worldwide bans. However, these bans are likely based on a singular view in which some positive aspects of open burning are overlooked. In this study, we aimed to determine the thermal-induced changes of straw and straw arsenic (As) under open burning and heat-treatments (in the temperature range from 300 to 900 °C). It was found that silica phase in rice straw (so-called phytolith) can encapsulate As in its structure. Open burning or heat-treatment of straw resulted in a tighter association of As and phytolith, thereby reducing dissolution of As. We proposed an opinion that open burning causes air pollution, but it can increase the activity of phytolith in sequestrating As, enabling delayed As cycle in rice ecosystems. The combat of on-site open burning of rice straw to reduce air pollution will alter straw handling routines, thereby changing the cycle of straw phytolith and the route of straw As.
Keywords
- Open burning, Paddy field, Rice arsenic, Straw phytolith
ASJC Scopus subject areas
- Environmental Science(all)
- Environmental Engineering
- Environmental Science(all)
- Waste Management and Disposal
- Environmental Science(all)
- Management, Monitoring, Policy and Law
Cite this
- Standard
- Harvard
- Apa
- Vancouver
- BibTeX
- RIS
In: Journal of Environmental Management, Vol. 304, 114294, 15.02.2022.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Thermal induced changes of rice straw phytolith in relation to arsenic release
T2 - A perspective of rice straw arsenic under open burning
AU - Nguyen, Minh N.
AU - Nguyen, Anh T.Q.
AU - Dultz, Stefan
AU - Tsubota, Toshiki
AU - Duong, Lim T.
AU - Nguyen, Anh M.
AU - Pham, Nga T.T.
PY - 2022/2/15
Y1 - 2022/2/15
N2 - On-site open burning is a common practice for handling rice straw, but its negative impacts, e.g., biomass loss and air pollution, are largely debated worldwide. To address the negative effects of open burning, many efforts have been made to ‘ignite’ worldwide bans. However, these bans are likely based on a singular view in which some positive aspects of open burning are overlooked. In this study, we aimed to determine the thermal-induced changes of straw and straw arsenic (As) under open burning and heat-treatments (in the temperature range from 300 to 900 °C). It was found that silica phase in rice straw (so-called phytolith) can encapsulate As in its structure. Open burning or heat-treatment of straw resulted in a tighter association of As and phytolith, thereby reducing dissolution of As. We proposed an opinion that open burning causes air pollution, but it can increase the activity of phytolith in sequestrating As, enabling delayed As cycle in rice ecosystems. The combat of on-site open burning of rice straw to reduce air pollution will alter straw handling routines, thereby changing the cycle of straw phytolith and the route of straw As.
AB - On-site open burning is a common practice for handling rice straw, but its negative impacts, e.g., biomass loss and air pollution, are largely debated worldwide. To address the negative effects of open burning, many efforts have been made to ‘ignite’ worldwide bans. However, these bans are likely based on a singular view in which some positive aspects of open burning are overlooked. In this study, we aimed to determine the thermal-induced changes of straw and straw arsenic (As) under open burning and heat-treatments (in the temperature range from 300 to 900 °C). It was found that silica phase in rice straw (so-called phytolith) can encapsulate As in its structure. Open burning or heat-treatment of straw resulted in a tighter association of As and phytolith, thereby reducing dissolution of As. We proposed an opinion that open burning causes air pollution, but it can increase the activity of phytolith in sequestrating As, enabling delayed As cycle in rice ecosystems. The combat of on-site open burning of rice straw to reduce air pollution will alter straw handling routines, thereby changing the cycle of straw phytolith and the route of straw As.
KW - Open burning
KW - Paddy field
KW - Rice arsenic
KW - Straw phytolith
UR - http://www.scopus.com/inward/record.url?scp=85121103604&partnerID=8YFLogxK
U2 - 10.1016/j.jenvman.2021.114294
DO - 10.1016/j.jenvman.2021.114294
M3 - Article
C2 - 34920282
AN - SCOPUS:85121103604
VL - 304
JO - Journal of Environmental Management
JF - Journal of Environmental Management
SN - 0301-4797
M1 - 114294
ER -