Departmentof Ecology and Environmental Sciences, Pondicherry University, 605014, India.
Department of Biochemistry and Molecular Biology, Pondicherry University, 605014, India.
Chemosphere. 2021 Apr;269:128757. doi: 10.1016/j.chemosphere.2020.128757. Epub 2020 Oct 27.
In the present study, we assessed the extent of microplastic pollution in the road dust of Chennai, the fifth largest metropolitan city in India. This study is the first of its kind to be reported from India. Sixteen different locations were selected from which road dust samples were collected. The average microplastic abundance was estimated to be 227.94 ± 91.37 per hundred grams of street dust sample. Nile Red dye was used for microplastic identification and quantification. 92.46% of the quantified microplastics were fragments. Raman spectroscopy of a representative sample identified nine types of polymers viz. polyvinyl chloride, poly(ethylene-co-vinyl-acetate), HDPE, poly(tetrafluoroethylene), cellulose microcrystalline, lyocell, superflex-200, wax-1032, and AC-395. SEM-EDS analysis highlighted the presence of various trace elements pertaining to automobile exhausts. Assessment of microplastic pollution rampant in street dust, especially in coastal cities as Chennai, is a dire need as it pertains to the concerns of human health and escape into the marine environment.
在本研究中，我们评估了印度第五大城市钦奈的道路灰尘中的微塑料污染程度。这是印度首例此类报告。从该市的 16 个不同地点采集了道路灰尘样本。估计每百克街道灰尘样本中的微塑料丰度为 227.94 ± 91.37。尼罗红染料用于微塑料的鉴定和定量。定量的微塑料中有 92.46%是碎片。代表性样本的拉曼光谱鉴定出了 9 种聚合物，分别是聚氯乙烯、聚乙烯-醋酸乙烯酯共聚物、高密度聚乙烯、聚四氟乙烯、纤维素微晶、莱赛尔纤维、Superflex-200、蜡-1032 和 AC-395。SEM-EDS 分析强调了存在与汽车尾气有关的各种痕量元素。评估钦奈等沿海城市街道灰尘中普遍存在的微塑料污染是当务之急，因为这关系到人类健康和进入海洋环境的问题。
