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131.
This study examined the effects of troposphere ozone (O3) on rice by developing a portable ozone fumigation system and applied to the field in Hanoi, Vietnam. The system was nearly identical to the open top chamber but designed to easily and cheaply assess the O3 sensitivity of local agricultural crops in the actual field. The rice (Oryza sativa L.) was exposed to ozone during the flowering stage at peri-urban experimental site of Hanoi. The fumigation protocols covered five different levels, namely; non-filtered air (ambient) as the control treatment, 32, 62, 85 and 113 ppb in 7-h mean. It was found that observed impacts corresponded well to similar open-top chamber studies in other Asian countries. The methodology and the system left a large room for improvement and called for very careful interpretation and pre-conditions (e.g. low ambient O3 concentration). However, the portable O3 exposure in the field might open a door to the less developed countries to implement the phytotoxic risk assessment of the local agricultural species. 相似文献
132.
Minh NH Minh TB Kajiwara N Kunisue T Iwata H Viet PH Cam Tu NP Tuyen BC Tanabe S 《Chemosphere》2007,67(9):1794-1801
The Mekong River delta is one of the largest agricultural land in the Southeast Asia. It plays a very important role for agriculture and fisheries in South Vietnam. However, comprehensive studies on the environmental pollution of persistent organic pollutants (POPs) in Mekong River delta have not been carried out in recent years. In this study, we collected sediment samples from the Mekong River to evaluate the contamination and ecological risks caused by several POPs. The contamination pattern of POPs was DDT>PCBs>CHLs>HCHs>HCB. DDTs are the most abundant pollutants, their concentration ranging from 0.01 to 110 ng/g dry wt, followed by PCBs (0.039-9.2 ng/g dry wt). DDTs and PCBs concentrations were higher in sediment from adjacent to urban areas than those from rural and agricultural sites, suggesting urban areas as important point sources of DDTs and PCBs to the river. Ratio of p,p'-DDT/p,p'-DDE was lower compared to those previously reported. However, some samples still had the ratio higher than 0.5, indicating recent input of DDT into the aquatic environments. This result shows that although the magnitude of contamination decreased over time, recent inputs of DDTs to the river still occur. Some sediment samples had concentrations of DDT compounds higher than the standards from the Canadian Environmental Quality Guideline, suggesting continuous monitoring for POPs contamination in the Mekong River is necessary. 相似文献
133.
Production of hydrogen and value-added carbon materials by catalytic methane decomposition: a review
Pham Cham Q. Siang Tan Ji Kumar Ponnusamy Senthil Ahmad Zainal Xiao Leilei Bahari Mahadi B. Cao Anh Ngoc T. Rajamohan Natarajan Qazaq Amjad Saleh Kumar Amit Show Pau Loke Vo Dai-Viet N. 《Environmental Chemistry Letters》2022,20(4):2339-2359
Environmental Chemistry Letters - Dihydrogen (H2), commonly named “hydrogen”, is attracting research interest due to potential applications in fuel cells, vehicles, pharmaceuticals and... 相似文献
134.
Pham Cham Q. Bahari Mahadi B. Kumar Ponnusamy Senthil Ahmed Shams Forruque Xiao Leilei Kumar Sunil Qazaq Amjad Saleh Siang Tan Ji Tran Huu-Tuan Islam Aminul Al-Gheethi Adel Vasseghian Yasser Vo Dai-Viet N. 《Environmental Chemistry Letters》2022,20(6):3613-3630
Environmental Chemistry Letters - The Ukraine war has strongly accentuated the ongoing energy and environmental issues, thus requiring a fast development of alternative and more local fuels. For... 相似文献
135.
The excessive use of antimicrobials in animal rearing and the associated environmental hazards have become a pressing issue. Animal agriculture is often viewed as a significant contributor to environmental degradation due to the residues of antimicrobials. It is a common practice to use livestock waste as a soil enhancer in farming. Despite some research into antimicrobials, there is room for more comprehensive data regarding these pollutants in animal farming environments. A handful of earlier studies have identified antimicrobials in animal waste. This research undertook the task of examining and evaluating soils amended with animal waste (from chickens, cows, and pigs) for the presence of seven specific antimicrobials. The antimicrobials under scrutiny included trimethoprim (TRI), ormethoprim (ORM), ofloxacin (OFL), norfloxacin (NOR), tetracycline (TET), chlortetracycline (CTE), and tylosin (TLS). Soil samples were collected from areas surrounding breeding farms located upstream of the Sai Gon River. These samples were then subjected to laboratory analysis, which involved solid-phase extraction using ultrasonic waves and the application of high-performance liquid chromatography-tandem mass spectrometry (LCMS/MS) to identify the antimicrobials. TRI, which had the highest average concentration (2.603–91.304 μg/kg), and OFL, with the second highest average concentration (1.815–15.832 μg/kg), were detected in all soil samples amended with manure. CTE, with the third highest average concentration, was found in soils amended with cow and pig waste (1.625–15.486 μg/kg). ORM and TE, with lower average concentrations (0.595–1.318 μ and 11.537–13.569 μg/kg, respectively), were only detected in soils amended with chicken waste, while NOR was only found in soils amended with cow waste. These findings indicate that the use of antimicrobials in animal farming can negatively impact the soil ecosystem. Consequently, these results can contribute to the creation of guidelines for monitoring antimicrobial residues in agricultural ecosystems. 相似文献
136.
Le Lam Hai Pham Anh Thi Hoang 《Environmental science and pollution research international》2022,29(54):81234-81255
Environmental Science and Pollution Research - The Environment Fund is a state financial institution and a non-profit organization, operating mainly in concessional loans with low-interest rates... 相似文献
137.
Pham Hong Thi Vu Long Duc Lê Ngoc Chi Hoang Thu-Huong Thi 《Environmental science and pollution research international》2022,29(28):42005-42015
Environmental Science and Pollution Research - It is increasingly being recognized that biotic ligand models (BLMs) can successfully predict the toxicity of divalent metals toward aquatic biota... 相似文献
138.
Subeshan Balakrishnan Pham Anh Murad Md. Shafinur Asmatulu Eylem 《Journal of Material Cycles and Waste Management》2023,25(5):2559-2583
Journal of Material Cycles and Waste Management - Mercury (Hg) is a naturally occurring chemical found in rock and coal deposits that can exist in various forms, including elemental Hg, inorganic... 相似文献
139.
Hussain Anwar Rahman Khalil Ur Shahid Muhammad Haider Sajjad Pham Quoc Bao Linh Nguyen Thi Thuy Sammen Saad Shauket 《Environment, Development and Sustainability》2022,24(9):10852-10875
Environment, Development and Sustainability - The low water storage capacity caused water crisis in Pakistan; therefore, the country needs both small- and large-scale reservoirs to store surplus... 相似文献
140.
Pham Thuyen Thi Lam Thanh Phuong Mai Le Dang Hoa Pham Nhien Thi 《Journal of Material Cycles and Waste Management》2023,25(5):2900-2914
Journal of Material Cycles and Waste Management - E-waste is becoming a concern due to its toxic content and serious pollution effect. Many studies have focused on the detrimental impacts of... 相似文献