Spatial variation of metal(loid)s in sediments of an Atlantic mesotidal estuary (Sado estuary, Portugal)

IF 5.3 3区环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES

Marine pollution bulletin Pub Date : 2024-11-06 DOI:10.1016/j.marpolbul.2024.117188

José Miguel Almeida , Carla Palma , Pedro M. Félix , Ana C. Brito

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引用次数: 0

Abstract

Estuaries offer favorable conditions for human settlement. As a result, pollutants, such as metals, have been released to these systems. Those are adsorbed by particulate material that tend to settle at the bottom and sink in the sediment. This article analyses the results of metals in sediments of the Sado estuary (Portugal) on a large spatial scale, to differentiate areas according to their impacts and possible sources. The metals were analyzed by Atomic Absorption Spectroscopy and a Direct Mercury Analyser. Higher concentrations, particularly of As, Cr and Zn ([32, 40] mg/kg, [102, 115] mg/kg, [672, 896] mg/kg) were observed at upstream areas of the Alcácer and Marateca channels. Both anthropogenic and natural origins in the area were considered to understand the results, such as industrial activities and geological context. Overall, the concentrations registered do not reach levels of contamination, and the improvement in the quality of the estuary is reflected.

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大西洋潮间带河口（葡萄牙萨多河口）沉积物中金属（loid）的空间变化

河口为人类定居提供了有利条件。因此，金属等污染物被排放到这些系统中。这些污染物被颗粒物质吸附，往往沉降在底部，并沉入沉积物中。本文对葡萄牙萨多河口沉积物中的金属进行了大范围分析，以根据其影响和可能的来源区分不同区域。采用原子吸收光谱法和直接汞分析仪对金属进行了分析。在 Alcácer 和 Marateca 河道上游地区观察到较高的浓度，尤其是砷、铬和锌（[32, 40] mg/kg、[102, 115] mg/kg、[672, 896] mg/kg）。为了解这些结果，考虑了该地区的人为和自然因素，如工业活动和地质环境。总体而言，登记的浓度未达到污染水平，反映出河口质量有所改善。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Marine pollution bulletin 环境科学-海洋与淡水生物学

CiteScore

10.20

自引率

15.50%

发文量

1077

审稿时长

68 days

期刊介绍： Marine Pollution Bulletin is concerned with the rational use of maritime and marine resources in estuaries, the seas and oceans, as well as with documenting marine pollution and introducing new forms of measurement and analysis. A wide range of topics are discussed as news, comment, reviews and research reports, not only on effluent disposal and pollution control, but also on the management, economic aspects and protection of the marine environment in general.