印度泰米尔纳德邦不同沿海地区微塑料的分布模式、来源和影响的季节性和空间变化。
Seasonal and spatial variations in the distribution pattern, sources and impacts of microplastics along different coastal zones of Tamil Nadu, India.
机构信息
Suganthi Devadason Marine Research Institute, Tuticorin, Tamil Nadu, India.
Tamil Nadu Pollution Control Board, Government of Tamil Nadu, Chennai, India.
出版信息
Mar Pollut Bull. 2023 Jul;192:115114. doi: 10.1016/j.marpolbul.2023.115114. Epub 2023 Jun 3.
We investigated spatiotemporal variations of microplastics (MPs) in Coromandel Coast, Palk Bay, Gulf of Mannar, and West Coast of Tamil Nadu, India. MPs abundance varies from 37 ± 1.52 to 189 ± 9.02 items/kg in sediment and 23 ± 15.25 to 155.25 ± 4.16 items/L in water. Highest abundance in monsoon by riverine inflow transports plastic waste to the ocean. MPs sizes 0.5-1 mm are dominant in summer with 16 polymers, while 3-4 mm dominates the monsoon with 23 polymers. Carbonyl Index shows high MP oxidation (>0.31), unrelated to spatiotemporal changes. SEM-EDAX shows weathered MPs carrying hazardous metals. High MP diversity (MPDII = 0.77) of Coromandel Coast points to many sources of pollution and the need for immediate control measures. Pollution load values indicate low degree of MP pollution (<10), polymer hazard index shows level III (10-100) and IV (100-1000), and ecological risk assessment shows minor risks (<150) at present.
我们研究了印度科罗曼德尔海岸、帕尔克湾、马纳尔湾和泰米尔纳德邦西海岸的微塑料（MPs）的时空变化。在沉积物中，MPs 的丰度从 37±1.52 到 189±9.02 个/千克不等，在水中从 23±15.25 到 155.25±4.16 个/升不等。由于河流的输入，季风期间 MPs 的丰度最高，将塑料废物输送到海洋。尺寸为 0.5-1 毫米的 MPs 在夏季占主导地位，有 16 种聚合物，而 3-4 毫米的 MPs 在季风期间占主导地位，有 23 种聚合物。羰基指数表明 MPs 高度氧化（>0.31），与时空变化无关。SEM-EDAX 显示风化的 MPs 携带危险金属。科罗曼德尔海岸的 MPs 多样性高（MPDII=0.77），表明存在许多污染源，需要立即采取控制措施。污染负荷值表明 MP 污染程度低（<10），聚合物危害指数为 III 级（10-100）和 IV 级（100-1000），生态风险评估显示目前风险较小（<150）。
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