Occurrence and distribution of heavy metals in the tissues of Physa acuta (D.) in relation to the contamination level of sediments from Boumerzoug wadi (Algeria)

IF 1.5 4区环境科学与生态学 Q4 ENVIRONMENTAL SCIENCES

Environmental Forensics Pub Date : 2021-10-07 DOI:10.1080/15275922.2021.1976313

Dounia Keddari, Imane Smatti-Hamza, S. Mehennaoui, L. Sahli, Fatima-Zohra Afri-Mehennaoui

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引用次数: 1

Abstract

Abstract The aim of this study was to assess the metallic contamination of sediments, and metals bioaccessibility via their distribution in the gastropod Physa acuta (Pulmonata). The concentrations of Cd, Co, Cr, Cu, Mn, Ni, Pb and Zn in the soft tissue and shell of P. acuta, as well as in fresh surface sediments from the Boumerzoug wadi and its tributaries, northeastern Algeria, were determined by flame atomic absorption spectrophotometry. The samples were collected from ten sites on five occasions (May, September and December 2016, March and July 2017). Results showed that the trace metal mean concentrations in sediments, tissues and shells of the gasteropod, followed a decreasing order: Mn > Zn > Cr > Cu > Ni > Pb > Co > Cd. The pseudo-total contents of Cd, Co, Cr, Cu, Mn, Ni, Pb, and Zn in sediment were about 0.45 ± 0.43, 12.19 ± 2.49, 51.70 ± 19.82, 46.70 ± 39.60, 296.15 ± 105.83, 36.50 ± 10.93, 32.40 ± 9.10, and 186.72 ± 118.93 mg/kg dw, respectively. The concentrations of the metals studied in P. acuta were age dependent, with adults having significantly higher concentrations than juveniles. All heavy metal concentrations detected were higher in soft tissue with the lowest coefficient of variation than in shells for both adults and juveniles. The presence of a significant direct relationship between the Cd content in the sediment and in the soft tissues of P. acuta in both adults (r = 0.83; P < 0.01) and juveniles (r = 0.53; P < 0.01), and the high bioaccumulation factor observed make this gastropod a good indicator for the monitoring of freshwater sediment contamination by this metal.

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阿尔及利亚Boumerzoug wadi沉积物污染水平与尖藻(Physa acuta)组织中重金属的发生和分布

摘要本研究旨在研究沉积物中的金属污染，以及金属在腹足动物中分布的生物可及性。采用火焰原子吸收分光光度法测定了阿尔及利亚东北部Boumerzoug河及其支流淡水表层沉积物中Cd、Co、Cr、Cu、Mn、Ni、Pb和Zn的含量。样本于2016年5月、9月和12月、2017年3月和7月5次在10个地点采集。结果表明:沉积物、组织和甲壳中微量金属的平均含量依次为Mn > Zn > Cr > Cu > Ni > Pb > Co > Cd。沉积物中Cd、Co、Cr、Cu、Mn、Ni、Pb、Zn的准总含量分别为0.45±0.43、12.19±2.49、51.70±19.82、46.70±39.60、296.15±105.83、36.50±10.93、32.40±9.10和186.72±118.93 mg/kg dw。所研究的金属浓度与年龄有关，成虫的浓度明显高于幼虫。成鱼和幼鱼软组织中重金属含量均高于壳中，变异系数最低。两种成虫的沉积物中Cd含量与软组织中Cd含量之间存在显著的直接关系(r = 0.83;P < 0.01)和幼鱼(r = 0.53;P < 0.01)，且具有较高的生物蓄积因子，可作为监测淡水沉积物中重金属污染的良好指标。

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来源期刊

Environmental Forensics 环境科学-环境科学

CiteScore

4.90

自引率

5.60%

发文量

审稿时长

3 months

期刊介绍： Environmental Forensics provides a forum for scientific investigations that address environment contamination, its sources, and the historical reconstruction of its release into the environment. The context for investigations that form the published papers in the journal are often subjects to regulatory or legal proceedings, public scrutiny, and debate. In all contexts, rigorous scientific underpinnings guide the subject investigations. Specifically, the journal is an international, quarterly, peer-reviewed publication offering scientific studies that explore or are relevant to the source, age, fate, transport, as well as human health and ecological effects of environmental contamination. Journal subject matter encompasses all aspects of contamination mentioned above within the environmental media of air, water, soil, sediments and biota. Data evaluation and analysis approaches are highlighted as well including multivariate statistical methods. Journal focus is on scientific and technical information, data, and critical analysis in the following areas: -Contaminant Fingerprinting for source identification and/or age-dating, including (but not limited to) chemical, isotopic, chiral, mineralogical/microscopy techniques, DNA and tree-ring fingerprinting -Specific Evaluative Techniques for source identification and/or age-dating including (but not limited to) historical document and aerial photography review, signature chemicals, atmospheric tracers and markets forensics, background concentration evaluations. -Statistical Evaluation, Contaminant Modeling and Data Visualization -Vapor Intrusion including delineating the source and background values of indoor air contamination -Integrated Case Studies, employing environmental fate techniques -Legal Considerations, including strategic considerations for environmental fate in litigation and arbitration, and regulatory statutes and actions