Toxic heavy metals in a landfill environment (Vientiane, Laos): Fish species and associated health risk assessment

IF 4.2 3区环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES

Environmental toxicology and pharmacology Pub Date : 2024-05-03 DOI:10.1016/j.etap.2024.104460

Vongdala Noudeng , Dek Vimean Pheakdey , Tran Dang Xuan

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引用次数: 0

Abstract

Leachates from municipal landfills introduce toxic heavy metals into water, causing bioaccumulation. This study assesses metal levels and potential human health risks associated with consuming Anabas testudineus and Channa striata. Inductively coupled plasma mass spectrometry detected Cd, Cu, Cr, Ni, Pb, and Zn in both fish species. Leachate metal concentrations meet international discharge standards, Cd, Cr, and Pb in the fish exceed the international accepted values. Gastrointestinal tract+liver samples show significant variation between species, particularly in Cd and Pb. EDI, THQ/HI, and TR for the both species fall below TDIs, lower than the limit of 1, and within the acceptable range of the US-EPA permissible limit, respectively. Fish consumption appears safe regarding carcinogenic risk, but exceeding metal limits could impact heavy metals accumulation in the local food chain. Raising public awareness is crucial, and governmental agencies and environmental organizations should enhance waste treatment technologies and enact relevant health legislation.

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垃圾填埋场环境中的有毒重金属（老挝万象）：鱼类物种及相关健康风险评估。

城市垃圾填埋场的渗滤液会将有毒重金属带入水中，造成生物累积。本研究评估了与食用鲶鱼和条斑鳢相关的金属含量和潜在的人类健康风险。电感耦合等离子体质谱法检测了这两种鱼类体内的镉、铜、铬、镍、铅和锌。渗滤液中的金属浓度符合国际排放标准，鱼类体内的镉、铬和铅超过了国际公认值。胃肠道和肝脏样本显示出不同物种之间的显著差异，尤其是镉和铅。两种鱼类的 EDI、THQ/HI 和 TR 分别低于 TDI，低于 1 的限值，在美国环保局允许限值的可接受范围内。就致癌风险而言，食用鱼类似乎是安全的，但金属超标可能会影响重金属在当地食物链中的积累。提高公众意识至关重要，政府机构和环保组织应加强废物处理技术，并制定相关的卫生法规。

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来源期刊

Environmental toxicology and pharmacology 医学-毒理学

CiteScore

7.00

自引率

4.70%

发文量

185

审稿时长

34 days

期刊介绍： Environmental Toxicology and Pharmacology publishes the results of studies concerning toxic and pharmacological effects of (human and veterinary) drugs and of environmental contaminants in animals and man. Areas of special interest are: molecular mechanisms of toxicity, biotransformation and toxicokinetics (including toxicokinetic modelling), molecular, biochemical and physiological mechanisms explaining differences in sensitivity between species and individuals, the characterisation of pathophysiological models and mechanisms involved in the development of effects and the identification of biological markers that can be used to study exposure and effects in man and animals. In addition to full length papers, short communications, full-length reviews and mini-reviews, Environmental Toxicology and Pharmacology will publish in depth assessments of special problem areas. The latter publications may exceed the length of a full length paper three to fourfold. A basic requirement is that the assessments are made under the auspices of international groups of leading experts in the fields concerned. The information examined may either consist of data that were already published, or of new data that were obtained within the framework of collaborative research programmes. Provision is also made for the acceptance of minireviews on (classes of) compounds, toxicities or mechanisms, debating recent advances in rapidly developing fields that fall within the scope of the journal.