Microplastics and heavy metals in freshwater fish species in the southwestern region of Bangladesh:An emerging concern for public health  

作　　者：Mst Shamima Akter Tapos Kumar Chakraborty Gopal Chandra Ghosh Md Simoon Nice Samina Zaman Abu Shamim Khan 

机构地区：[1]Department of Environmental Science and Technology,Jashore University of Science and Technology,Jashore 7408,Bangladesh [2]Environmental Laboratory,Asia Arsenic Network,Jashore 7400,Bangladesh

出　　处：《Emerging Contaminants》2024年第3期145-157,共13页新兴污染物（英文）

摘　　要：Microplastics(MPs)pollution and its associated toxicity raising concerns among scientists as a result of their toxicological impacts on human health and the ecosystem.This study aims to investigate the microplastics and heavy metals(HMs)contamination in seventeen freshwater fish species collected from the Southwestern region of Bangladesh.Microplastics extracted from these species using the hydrogen peroxide digestion method and characterized by Attenuated Total Reflection-Fourier Transform Infrared Spectroscopy(ATR-FTIR).Atomic Absorption Spectrometry(AAS)was used to determine the concentration of HMs in different species for evaluating human health risks.A total of 142 microplastic particles were extracted with an average concentration of 1.13±0.84 items per individual of fish,where the highest microplastics were found in C.punctata(3.43±3.15 items)and lowest in A.mola(0.14±0.38 items).Identified microplastics were dominated by<1 mm size(87.3%),black color(60.6%),and fiber shape(94.4%).Polyethylene(73.08%),polypropylene(21.15%),and polystyrene(5.77%)were the most prevalent among the identified microplastic polymers.A positive correlation was found between microplastic numbers and fish weight and length.Low to moderate human health risks were associated with microplastics.The concentration(mg/kg)of heavy metals in studied fish samples was Cr(0.47 e2.89;0.79±0.56)>Cu(0.01e1.14;0.50±0.44)>Pb(0.04e0.58;0.22±0.12)>Cd(0.00e0.11;0.03±0.03),respectively.Heavy metals-based human health risk assessment results show that there are no major non-carcinogenic health risks(THI<1),while higher carcinogenic risks are present for consumers.

关 键 词：Microplastics Edible fish Polymer type Heavy metals Human health risk BANGLADESH 

分 类 号：S917[农业科学—水产科学]