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Hu PT, Liu DH, Cao ZG, Wei H, Zhu FJ, Ma WL, Zhang ZF, Liu LY, Feng JL, Li YF, Li YF, Li YF. Effectively removing gaseous polycyclic aromatic hydrocarbons (PAHs) by willow catkins: Do you still dislike the catkins floating? J Hazard Mater 2023; 455:131639. [PMID: 37196441 DOI: 10.1016/j.jhazmat.2023.131639] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/25/2023] [Revised: 05/11/2023] [Accepted: 05/12/2023] [Indexed: 05/19/2023]
Abstract
The floating catkins generated by willow and poplar trees have been criticized for spreading germ and causing fire for decades. It has been found that catkins are with a hollow tubular structure, which made us wonder if the floating catkins can adsorb atmospheric pollutions. Thus, we conducted a project in Harbin, China to investigate whether and how willow catkins could adsorb atmospheric polycyclic aromatic hydrocarbons (PAHs). The results suggest that both the catkins floating in the air and on the ground preferred to adsorb gaseous PAHs rather than particulate PAHs. Moreover, 3- and 4-ring PAHs were the dominating compositions adsorbed by catkins, which significantly increased with exposure time. The gas/catkins partition (KCG) was defined, which explained why 3-ring PAHs are more easily adsorbed by catkins than by airborne particles when their subcooled liquid vapor pressure is high (log PL > -1.73). The removal loading of atmospheric PAHs by catkins were estimated as 1.03 kg/year in the center city of Harbin, which may well explain the phenomenon that levels of gaseous and total (particle + gas) PAHs are relatively low in the months with catkins floating reported in peer-reviewed papers.
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Affiliation(s)
- Peng-Tuan Hu
- School of Environment, Key Laboratory for Yellow River and Huai River Water Environment and Pollution Control, Ministry of Education, Henan Normal University, Xinxiang 453007, PR China
| | - Dong-Hai Liu
- School of Environment, Key Laboratory for Yellow River and Huai River Water Environment and Pollution Control, Ministry of Education, Henan Normal University, Xinxiang 453007, PR China
| | - Zhi-Guo Cao
- School of Environment, Key Laboratory for Yellow River and Huai River Water Environment and Pollution Control, Ministry of Education, Henan Normal University, Xinxiang 453007, PR China
| | - Hong Wei
- International Joint Research Center for Persistent Toxic Substances (IJRC-PTS), State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology (HIT), Harbin 150090, PR China; Hangzhou PuYu Technology Development Co., Ltd., Hangzhou 311300, PR China
| | - Fu-Jie Zhu
- School of Energy and Environmental Engineering, Hebei University of Technology, Tianjin 300401, PR China
| | - Wan-Li Ma
- International Joint Research Center for Persistent Toxic Substances (IJRC-PTS), State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology (HIT), Harbin 150090, PR China
| | - Zi-Feng Zhang
- International Joint Research Center for Persistent Toxic Substances (IJRC-PTS), State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology (HIT), Harbin 150090, PR China
| | - Li-Yan Liu
- International Joint Research Center for Persistent Toxic Substances (IJRC-PTS), State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology (HIT), Harbin 150090, PR China
| | - Jing-Lan Feng
- School of Environment, Key Laboratory for Yellow River and Huai River Water Environment and Pollution Control, Ministry of Education, Henan Normal University, Xinxiang 453007, PR China
| | | | - Yu-Fei Li
- Northeast Forestry University, Harbin, PR China
| | - Yi-Fan Li
- International Joint Research Center for Persistent Toxic Substances (IJRC-PTS), State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology (HIT), Harbin 150090, PR China.
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Huang H, Shan K, Liu J, Tao X, Periyasamy S, Durairaj S, Jiang Z, Jacob JA. Synthesis, optimization and characterization of silver nanoparticles using the catkin extract of Piper longum for bactericidal effect against food-borne pathogens via conventional and mathematical approaches. Bioorg Chem 2020; 103:104230. [PMID: 32916540 PMCID: PMC7449118 DOI: 10.1016/j.bioorg.2020.104230] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2020] [Revised: 08/03/2020] [Accepted: 08/08/2020] [Indexed: 02/06/2023]
Abstract
Inspired with an increasing environmental awareness, we performed an eco-friendly amenable process for the synthesis of silver nanoparticles (AgNPs) using the catkins of Piper longum as an alternative approach with the existing methods of using plant extracts. The fabrication of nanoparticles occurred within 10 min. This was initially observed by colour change of the solution. UV-visible spectroscopic studies (UV-Vis) were performed for further confirmation. The analysis elucidated that the surface plasmon resonance (SPR) was specifically corresponding to AgNPs. Fourier transform infrared spectrophotometry (FTIR) studies indicated that polyphenols could possibly be the encapsulating agents. The size and shape of the nanoparticles was analysed using Transmission electron microscopy (TEM). The nanoparticles were predominant spheres ranging between 10 and 42 nm at two different scales. The formation of elemental silver was confirmed further by X-ray photoelectron spectroscopy (XPS) and X-ray powder diffraction (XRD). GC-MS analysis was used to identify the possible encapsulates on the nanoparticles. The antibacterial effect of the biosynthesized AgNPs was tested against two gram-positive (Bacillus cereus and Staphylococcus aureus), and five gram-negative (Escherichia coli, Proteus mirabilis, Klebsiella pneumoniae, Pseudomonas aeruginosa and Salmonella typhi) bacteria. Outcomes of the study suggest that these pathogens were susceptible to the AgNPs. This is the first ever international report on correlating the antibacterial effect of silver nanoparticles using mathematical modelling with a conventional antimicrobial assay. The results indicate that nanoparticles of silver synthesized using catkin extract of P. longum can be exploited towards the development of potential antibacterial agents.
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Affiliation(s)
- Hui Huang
- Department of Respiratory Diseases, Kunshan Affiliated Hospital of Nanjing University of Chinese Medicine, Kunshan 215300, China
| | - Kuizhong Shan
- Department of Oncology, The Second People's Hospital of Kunshan, Kunshan 215300, China
| | - Jingbing Liu
- Department of Oncology, Affiliated Hospital of Integrated Traditional Chinese and Western Medicine, Nanjing University of Chinese Medicine, Nanjing 210028, China
| | - Xiaoxin Tao
- Department of Oncology, Liyang People's Hospital, Liyang 213300, China
| | - Sivalingam Periyasamy
- PG and Research Department of Microbiology, Jamal Mohamed College, Khajanagar, Tiruchirappalli, Tamil Nadu 620020, India
| | - Siva Durairaj
- PG & Research Department of Biotechnology, Srimad Andavan Arts and Science College (Autonomous), Tiruchirappalli, Tamil Nadu 620005, India
| | - Ziyu Jiang
- Department of Oncology, Affiliated Hospital of Integrated Traditional Chinese and Western Medicine, Nanjing University of Chinese Medicine, Nanjing 210028, China.
| | - Joe Antony Jacob
- Nanosynthesis Unit, Nanome Consulting, Salem, Tamil Nadu 636008, India.
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Thapliyal G, Vemanna RS, Pawar PM, Barthwal S, Meena RK, Pandey S, Bhandari MS. First record of off-season flowering in Populus deltoides from India: paradigm of climate change indicator. Int J Biometeorol 2020; 64:1629-1634. [PMID: 32415620 DOI: 10.1007/s00484-020-01915-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/05/2020] [Accepted: 04/04/2020] [Indexed: 06/11/2023]
Abstract
Populus deltoides is a fast-growing woody species possessing plethora of industrial applications. This species evolutionarily developed unisexual male and female catkin inflorescence on separate trees. Flowering usually occurs during early spring before the development of foliage, where buds appear near axils or at the extending shoots. In 2019, surveys were undertaken to study the flowering pattern of P. deltoides in the states of Punjab, Haryana, Uttar Pradesh and Uttarakhand in northern India. Interestingly, an anomalous flowering behaviour (appearance of off-season male catkins during autumn, i.e. October) was observed in a plantation trial at Kapurthala, Punjab. The male catkins were 2.7-3.1 ± 0.07 cm long and 0.3-0.5 ± 0.03 cm wide, which is significant for flowering and liberation of pollen grains. Preliminary results suggested that climatic factors, such as episodes of high or low temperature and the precipitation variation forcing the tree species to behave differently. Unearthing the climate-driven off-season flowering in other tree species alluded the stimulation of phytohormones, such as gibberellic and salicylic acid concentrations influencing the flowering time, therefore, needs further investigation in case of P. deltoides. Overall, this work provides early clues of changing climatic scenario altering the flowering pattern of a tropical forestry tree species.
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Affiliation(s)
- Garima Thapliyal
- Division of Genetics & Tree Improvement, Forest Research Institute, Dehradun, Uttarakhand, 248 195, India
| | - Ramu S Vemanna
- Regional Center for Biotechnology, NCR Biotech Science Cluster, 3rd Milestone, Faridabad Gurgaon Expressway, Faridabad, Haryana, 121 001, India
| | - Prashant Mohan Pawar
- Regional Center for Biotechnology, NCR Biotech Science Cluster, 3rd Milestone, Faridabad Gurgaon Expressway, Faridabad, Haryana, 121 001, India
| | - Santan Barthwal
- Division of Genetics & Tree Improvement, Forest Research Institute, Dehradun, Uttarakhand, 248 195, India
| | - Rajendra K Meena
- Division of Genetics & Tree Improvement, Forest Research Institute, Dehradun, Uttarakhand, 248 195, India
| | - Shailesh Pandey
- Forest Pathology Discipline, Division of Forest Protection, Forest Research Institute, Dehradun, Uttarakhand, 248 006, India
| | - Maneesh S Bhandari
- Division of Genetics & Tree Improvement, Forest Research Institute, Dehradun, Uttarakhand, 248 195, India.
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