Abstract

The amount of information available on the microplastic (MP) contamination in Goa’s riverine water systems is currently limited. The abundance, size, colour, and polymer composition of microplastics in Chapora River surface water were investigated in this study. MPs in Chapora River surface water ranged from 0.1 particles/L (station 13) to 0.47 particles/L (station 5). The mean (± standard deviation) MP concentration was 0.25 (± 0.13) particles/L. Fibre was the dominant shape (77.15%), followed by fragments (12.36%), films (9.36%), and foam (1.12%). Most MPs were found in the 0.1–0.3 mm size range, then in the 0.3–1 mm and 1–5 mm. The dominant type of polymer studied was polyethylene terephthalate (PET; 46%), followed by high-density polyethylene (HDPE; 14%), polypropylene (PP; 5%), and polystyrene (PS; 1%). The risk assessment study indicated high risk with respect to PHI, while PLI shows low risk in the area. The source of MPs was mostly anthropogenic in nature in the region. When compared with other tropical rivers, MP pollution was relatively lower in the Chapora River. Nevertheless, the baseline data will help the local administration take mitigation measures to reduce the impact of MP pollution in the region.

中文翻译：

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印度西南部果阿查波拉河的微塑料污染：空间分布和风险评估

摘要

目前，有关果阿河流水系统中微塑料 (MP) 污染的信息量有限。本研究调查了查波拉河地表水中微塑料的丰度、大小、颜色和聚合物组成。恰波拉河地表水中的 MP 范围为 0.1 颗粒/升（站 13）至 0.47 颗粒/升（站 5）。平均（±标准偏差）MP浓度为0.25（±0.13）颗粒/L。纤维是主要形状（77.15%），其次是碎片（12.36%）、薄膜（9.36%）和泡沫（1.12%）。大多数 MP 的尺寸范围为 0.1-0.3 毫米，然后是 0.3-1 毫米和 1-5 毫米。研究的主要聚合物类型是聚对苯二甲酸乙二醇酯（PET；46%），其次是高密度聚乙烯（HDPE；14%）、聚丙烯（PP；5%）和聚苯乙烯（PS；1%）。风险评估研究表明 PHI 风险较高，而 PLI 显示该地区风险较低。该地区议员的来源主要是人为的。与其他热带河流相比，查波拉河的MP污染相对较低。尽管如此，基线数据将有助于当地政府采取缓解措施，减少MP污染对该地区的影响。