Co-occurrence of microplastics and heavy metals in a freshwater lake system in Indian Himalaya: Distribution and influencing factors

被引：9

作者：

Kumar, Sunil ^{[1
]}

Ajay, Kumar ^{[1
]}

Behera, Diptimayee ^{[1
]}

Yaseen, Aarif ^{[2
]}

Karthick, Balasubramanian ^{[3
]}

Prasad, Sushma ^{[4
]}

Bhat, Sami Ullah ^{[2
]}

Jehangir, Arshid ^{[2
]}

Anoop, Ambili ^{[1
]}

机构：

[1] Indian Inst Sci Educ & Res Mohali, Dept Earth & Environm Sci, Mohali 140306, Punjab, India

[2] Univ Kashmir, Dept Environm Sci, Srinagar 190006, J&K, India

[3] Agharkar Res Inst, Biodivers & Paleobiol Grp, GG Agarkar Rd, Pune 411004, Maharashtra, India

[4] Potsdam Univ, Inst Geosci, Karl Liebknecht Str 24-25, D-14476 Potsdam, Germany

来源：

EMERGING CONTAMINANTS | 2025年 / 11卷 / 01期

关键词：

Freshwater lakes; Grain size; Himalaya; Heavy metals; Microplastics; Total organic carbon;

D O I：

10.1016/j.emcon.2024.100394

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Microplastic (MP) contamination in freshwater systems is a prevalent and persistent environmental issue, yet their occurrence and distribution remain poorly constrained. The present study examines the MPs abundance in sediment and water samples and factors controlling their distribution in the Manasbal Lake, north-western (NW) Himalaya. Additionally, the study investigates the relationship between heavy metals and the distribution of MPs in sediment, as well as their potential interactions. The MPs counts in lake surface sediment and water samples varied from 840 nkg 1 to 4020 nkg 1 and 13 nL 1 to 89 nL 1, respectively. The MPs distribution in Manasbal Lake exhibited spatial heterogeneity, with the greatest abundance observed in the eastern and northeastern areas near lake inlets. Grain size and land use appear to collectively modulate the variability of MPs in Manasbal Lake sediments. Five main MPs types were identified: beads/pellets, fragments, fibres, foams, and films, with beads being the predominant type. Polypropylene, polyethylene, and polystyrene are the dominant constituents of the observed MPs, with domestic sewage suggested as the predominant source for their abundance in the lake. Furthermore, the contamination factor for heavy metals indicated a high level of lead contamination in surface sediments, while copper and cobalt showed moderate contamination near the lake inlet. The SEM-EDS analysis illustrated the presence of toxic elements such as Hg, Zn, Pb, Cr, Cd, Ni, and Cu to the surface of MPs. This study expands the baseline characterization of MPs in freshwater systems and enhances our understanding of the potential sources and factors influencing MP distribution. (c) 2024 The Authors. Publishing services by Elsevier B.V. on behalf of KeAi Communications Co. Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/ 4.0/).

引用

页数：11

共 78 条

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