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Source identification, contamination status and health risk assessment of heavy metals from road dusts in Dhaka, Bangladesh

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Journal of Environmental Sciences 2022年第11期34卷 159-174页

作者： Aklima Nargis Ahsan Habib md Nazrul islam Kai Chen md shafiqul islam.sarker A N M Al-Razee Wenbin Liu Guorui Liu Minggang Cai Coastal and Ocean Management Institute&State Key laboratory of Marine Environmental Science Xiamen UniversityXiamen 361005China Department of Chemistry University of DhakaDhaka 1000Bangladesh Central Chemical Laboratory Department of Narcotics ControlMinistry of Home AffairsDhaka 1204Bangladesh Department of Analytical Chemistry&Environmental Science Training Institute for Chemical IndustriesPolashNarsingdi 1611Bangladesh State Key Laboratory of Environmental Chemistry and Ecotoxicology Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China

In this study, concentrations of Cr, Mn, Ni, Cu, Zn, Cd and Pb were determined in road dusts collected from different locations in Dhaka to assess source, contamination status and health risk. Energy-dispersive X-ray fluorescence spectroscopy and energy-dispersive X-ray spectroscopy were used to determine Cr, Mn, Ni, Cu, Zn, Cd and Pb and their mean concentrations were 162.27 ± 29.46, 721.18 ± 180.14, 35.65 ± 12.55, 104.56 ± 128.33, 515.32 ± 321.90,BDL, and 342.82 ± 591.20 mg/kg, respectively. Among the heavy metals, highest concentrations of Cu, Zn and Pb were found at urban sites-7(municipal waste dumping) and 8(medical waste incineration). Highest concentration of Cr followed by Cu and Zn was found at site-5(Tejgaon, urban). Principal component analysis revealed that anthropogenic activities are the potential sources for Cr, Ni, Cu, Zn and Pb while earth crust for Mn. Pollution index and pollution load index results suggested that all the sites were contaminated and/or degraded by Cr, Cu, Zn and Pb except sites-9(urban), 10(sub-urban), 11(rural) while sites-7 and 8(urban) were extremely degraded. For noncarcinogenic health risk, hazard quotient values for dermal were higher compared to that of inhalation/ingestion. Though hazard index values were less than 1 at all the sites, these were at least one order of magnitude higher for children group than that of adult group, thus the children group may face more noncarcinogenic health risk at sites -7 and 8. Values of incremental lifetime cancer risk were from 10to 10showed no carcinogenic health risk by road dusts contaminated with the heavy metals.

关键词： Heavy metal Road dust Dhaka Principal component analysis Pollution status Health risk assessment

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Spatial distribution,source apportionment,and associated risks of trace metals (As,Pb,Cr,Cd,and Hg) from a subtropical river,Gomti,Bangladesh

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International Journal of Sediment Research 2022年第1期37卷 83-96页

作者： Abu Sayeed Shafiuddin Ahmed Mohammad Belal Hossain Saad Mohammad Omar Faruque Babu Moshiur Rahman Jun Sun Mohammad shafiqul islam.sarker Department of Fisheries and Marine Science Noakhali Science and Technology University School of Engineering and Built Environment Griffith University College of Marine and Environmental Sciences Tianjin University of Science and Technology Forensic Science Laboratory Rapid Action Battalions Headquarters

Sediment samples from the Gomti River basin were investigated to determine and evaluate trace metal concentrations,their biological effect,and potential ecological and human health risks for adults and *** mean concentrations of trace metals were organized in the descending order of mercury(Hg)(0.08 mg/kg)>chromium (Cr)(0.06 mg/kg)>lead (Pb)(0.05 mg/kg)>arsenic (As)(0.02 mg/kg)>cadmium (Cd)(0.01 mg/kg).The current study illustrated that metals were attributed to the area from natural sources and different anthropogenic sources especially from ***,the concentration levels were lower than the sediment quality guidelines (SQGs) based on the effect-range classifications of threshold effect concentration (TEC) and probable effect concentration (PEC).Therefore,the concentration of the elements showed no adverse biological effects on aquatic *** evaluated potential ecological risk index also revealed the low toxicity to the aquatic ***,the applied sediment quality indices,geo-accumulation index (Igeo),contamination factor (CF),and contamination severity index (CSI) suggested that the contamination levels of the elements were in the acceptable range,and the contamination had not notably impacted on the sediment *** risk index (HI) concerning age groups was significantly less than the threshold limit of 1 indicating that the contamination had no non-carcinogenic risk *** total carcinogenic risk (TCR) was less than a risk value of 1×***,the current study suggests that immediate remediation is not required due to an absence of alarming conditions in the study *** monitoring of the attribution of the metal elements should be done for the betterment of human and environmental health.

关键词： Trace metals Biological effects Ecological risk Human health risk Gomti river Bangladesh

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Status of multielement in water of the river Buriganga, Bangladesh: Aquatic chemistry of metal ions in polluted river water

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Emerging Contaminants 2021年第1期7卷 99-115页

作者： Aklima Nargis Ahsan Habib Harun-Or-Rashid Halima Binte Harun md shafiqul islam.sarker Rong Jin Guorui Liu Wenbin Liu A.N.M.Al-Razee Kai Chen Minggang Cai Coastal and Ocean Management Institute Xiamen UniversityXiamenPR China Department of Chemistry University of DhakaDhaka1000Bangladesh Central Chemical Laboratory Department of Narcotics ControlMinistry of Home AffairsDhaka1204Bangladesh Sate Key Laboratory of Environmental Chemistry and Ecotoxicology Research Center for Eco-Environmental ScienecsChinese Academy of SciencesBeijing100085PR China Department of Analytical Chemistry&Environmental Science Training Institute for Chemical IndustriesPolashBangladesh

The peripheral rivers of Dhaka city became highly polluted because of industrialization and urbanization to a greater extent in the last few ***,an attempt has been taken to measure 48 elements in water of the river Buriganga using the ICP-MS method for the first ***,it could be the reference values for future research in *** of the 48 elements,the following metals are given more attention because of their detrimental effects on living organisms and for discussing their aquatic chemistry in polluted water body:Be,Na,Al,Cr,Mn,Fe,Ni,Cu,Zn,Cd,Ba,Hg,Pb,Bi and *** revealed that metals’concentrations in water in the monsoon were less than that of the winter,however,Cr and Fe were found at below detection limits in the winter that is *** parameters of the river water such as pH,dissolved oxygen play vital roles for hydrolysis reactions in the stagnant water *** products of metal ions having low values of solubility products(K sp),for example,iron(III)hydroxide,chromium(III)hydroxide,phase out through precipitation *** study also detects and quantifies total concentrations of Hg and U in water of the river Buriganga for the first *** and correlation matrix results provided potential sources of the relevant *** of hydrolysis and precipitation reactions for metal ions in the polluted river water are also discussed.

关键词： hydrolysis winter river

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Predictors of Meningitis in Under-Fifteen Children Attending an Intensive Care Unit of an Urban Large Diarrheal Disease Hospital in Bangladesh

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Food and Nutrition Sciences 2014年第2期5卷 169-176页

作者： Farzana Afroze Tahmeed Ahmed shafiqul Alam sarker Abu S. G. Faruque Hasan Ashraf Pradip Kumar Bardhan Sumon Kumar Das Mohammod Jobayer Chisti Centre for Nutrition and Food Security (CNFS) International Centre for Diarrhoeal Disease Research Dhaka Bangladesh Centre for Nutrition and Food Security (CNFS) International Centre for Diarrhoeal Disease Research Dhaka Bangladesh School of Population Health The University of Queensland Brisbane Australia.

Background: Data are lack on predicting features of meningitis in diarrheal children although the great clinical importance. Objective: To evaluate clinical and laboratory features in predicting meningitis in under-fifteen children having diarrheal illnesses. Methods: Children aged 1 month to 15 years, admitted in the ICU of the Dhaka Hospital of icddr, b between March 2011 and February 2012 with fever and seizure or altered consciousness and having LP done were enrolled into this analysis. Those children who had abnormal CSF findings [pleocytosis (normal range of leukocyte, 0 - 10/mm3) and/or elevated protein (normal range, 0.10 - 0.45 mg/dl) and low glucose (normal value, 60% of corresponding blood glucose)] were defined as meningitis. Comparison was made between children with (cases = 17) and without meningitis (controls = 66) from our study children. Data were retrospectively collected from SHEBA, an online database system of the Dhaka Hospital of icddr, b. Results: Death was significantly higher among the cases compared to the controls (29% vs. 3%, p = 0.003). In logistic regression analysis, after adjusting for potential confounders, cases frequently had hypoxemia (95% CI 1.55 - 21.93), absent peripheral pulse (95% CI 1.95 - 27.13) and neutrophilia (95% CI 1.13 - 17.00). Conclusion: Our data suggest that children with meningitis had higher case fatality rate. Simple independent predictors of meningitis such as hypoxemia, absent peripheral pulse, and neutrophilia may help clinicians to initiate early and prompt management in order to curve lifelong sequel due to meningitis and death in such patient population especially those in resource poor settings.

关键词： Children Diarrhea Hypoxemia Meningitis Neutrophilia Peripheral Pulse

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