Seasonal foliar uptake of atmospheric polycyclic aromatic hydrocarbons by some local in a in India

被引:7
作者
Ray, Debajyoti [1 ,2 ]
Ghosh, Sanjay K. [1 ,2 ]
Raha, Sibaji [1 ,2 ]
机构
[1] Bose Inst, Dept Phys, 93-1 APC Rd, Kolkata 700009, India
[2] Ctr Astroparticle Phys & Space Sci, Block EN,Sect 5, Kolkata 700091, India
关键词
PAHs in leaves; Interspecies variation; Seasonality; Urban air pollution; PARTICULATE MATTER; PLANT CUTICLES; DRY DEPOSITION; AMBIENT AIR; ACCUMULATION; URBAN; LEAVES; PAHS; VEGETATION; TREE;
D O I
10.1016/j.apr.2020.10.013
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
This study explored the interspecies and seasonal variation of polycyclic aromatic hydrocarbons (PAHs) in the extracted lipids of the leaves of seven local plants in an urban environment of Kolkata (22 degrees 33'N and 88 degrees 20'E), India. Based on the degree of toxicity and carcinogenicity (expressed in terms of their Benzo(a)pyrene equivalent (BaPeq) concentrations) the overall foliar-PAH accumulation during the study period (September 2018-;August 2019) in the various plants showed the following order: Nerium oleander (80.96 +/- 30.08 ng.g(dw)(-1)) > Mangifera indica (74.15 +/- 20.34 ng.g(dw)(-1)) > Lantana aculeata (60.13 +/- 21.71 ng.g(dw)(-1)) > Thevetia peruviana (40.97 +/- 12.45 ng.g(dw)(-1)) > Ixora coccinea (38.11 +/- 9.5 ng.g(dw)(-1)) > Murraya paniculata (37.1 +/- 7.35 ng.g(dw)(-1)) > Polyalthia longifolia (25.72 +/- 5.71 ng.g(dw)(-1)). The PAHs like phenanthrene, anthracene, fluoranthene, pyrene, benzo(a)anthracene, chrysene, benzo (b+k)fluoranthene, benzo(a)pyrene, benzo [ghi]perylene and indeno [1,2,3-cd]pyrene were predominant during the study period over the PAHs like naphthalene, acynaphthylene, acenaphthene, fluorine and dibenz [a,h]anthracene in the extracted lipids. The temperature-dependent partitioning of the PAHs onto leaf-surface and photo-degradation could have affected the availability of the PAHs. The foliar PAH accumulation varied seasonally as winter (December-February) > postmonsoon (September-November) > premonsoon (March-May) > monsoon (June-August). The leaf epicuticular wax determined the PAH uptake and storage, which in turn was affected by the temperature and solar radiation. In consistence with the idea of "nature-based solutions" for deteriorated air quality remediation in an urban environment, this study could be a promising initiative to build up cost-effective biological filters to combat the airborne pollutants and improve urban air quality.
引用
收藏
页码:104 / 112
页数:9
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