{"title":"Microplastic Contamination of Non-Mulched Agricultural Soils in Bangladesh: Detection, Characterization, Source Apportionment and Probabilistic Health Risk Assessment.","authors":"Sumaya Sharmin, Qingyue Wang, Md Rezwanul Islam, Weiqian Wang, Christian Ebere Enyoh","doi":"10.3390/jox14020046","DOIUrl":"10.3390/jox14020046","url":null,"abstract":"<p><p>Microplastic contamination in agricultural soil is an emerging problem worldwide as it contaminates the food chain. Therefore, this research investigated the distribution of microplastics (MPs) in agricultural soils without mulch at various depths (0-5, 5-10, and 10-15 cm) across different zones: rural, local market, industrial, coastal, and research areas. The detection of MP types and morphology was conducted using FTIR and fluorescence microscopy, respectively. Eight types of MPs were identified, including high-density polyethylene (HDPE), low-density polyethylene (LDPE), polypropylene (PP), polyethylene terephthalate (PET), polyvinyl chloride (PVC), polyvinyl fluoride (PVF), polyvinyl alcohol (PVA), and polytetrafluoroethylene (PTFE), with concentrations ranging from 0.6 ± 0.21 to 3.71 ± 2.36 MPs/g of soil. The study found no significant trends in MP concentration, with ranges of 0-2.1 ± 0.38, 0-2.87 ± 0.55, and 0-2.0 ± 0.34 MPs/g of soil at depths of 0-5 cm, 5-10 cm, and 10-15 cm, respectively. The highest MP quantity was recorded at 8.67 in coastal area, while the lowest was 6.44 in the local market area. Various MP shapes, e.g., fiber, film, pellet, fragment, and irregular, were observed across all layers. PCA suggested irrigation and organic manure as potential sources of MPs. The estimated concentrations of MPs possessed low non-carcinogenic and carcinogenic risks to the farming community of Bangladesh.</p>","PeriodicalId":42356,"journal":{"name":"Journal of Xenobiotics","volume":"14 2","pages":"812-826"},"PeriodicalIF":6.8,"publicationDate":"2024-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11204539/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141451777","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Vanda Lopes de Andrade, Iolanda Ribeiro, Ana Paula Marreilha Dos Santos, Michael Aschner, Maria Luisa Mateus
{"title":"Carcinogenic Risk from Lead and Cadmium Contaminating Cow Milk and Soya Beverage Brands Available in the Portuguese Market.","authors":"Vanda Lopes de Andrade, Iolanda Ribeiro, Ana Paula Marreilha Dos Santos, Michael Aschner, Maria Luisa Mateus","doi":"10.3390/jox14020045","DOIUrl":"10.3390/jox14020045","url":null,"abstract":"<p><p>Our previous work demonstrated the presence of lead (Pb) and cadmium (Cd) contamination in cow milk (CM) and soy beverages (SBs) in Portugal. These metals share carcinogenic mechanisms, suggesting at least additive effects. Our goals were to assess carcinogenic risks from Pb and Cd intake detected in various CM and SB brands on the Portuguese market and to determine the relative contributions of Pb and Cd. Furthermore, we modeled different consumption scenarios for various age/body weight groups to estimate cumulative Excess Lifetime Carcinogenic Risk (ELCR). ELCR was computed by multiplying chronic daily intake by a cancer slope factor for each metal, with an ELCR > 1 × 10<sup>-4</sup> indicating carcinogenic risk. Five CM and three SB brands posed cancer risks in children, with the highest values at 1.75 × 10<sup>-4</sup> and 9.12 × 10<sup>-5</sup>, respectively; Pb had mean relative contributions of 87.8 ± 3.1% in CM and 54.9 ± 12.1% in SB. Carcinogenic risks were observed for children, adolescents, and adults in several CM or SB consumption scenarios, albeit at levels above typical Portuguese intakes. Strict monitoring of metal levels, such as Pb and Cd, is advised because CM is a component of many foods, including baby food.</p>","PeriodicalId":42356,"journal":{"name":"Journal of Xenobiotics","volume":"14 2","pages":"798-811"},"PeriodicalIF":6.8,"publicationDate":"2024-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11204583/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141451776","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Alexander C Ø Jensen, Niels E Ebbehøj, Anja J Huusom, Keld A Jensen, Ulla B Vogel, Jorid B Sørli
{"title":"The Underlying Mechanism of Poisoning after the Accidental Inhalation of Aerosolised Waterproofing Spray.","authors":"Alexander C Ø Jensen, Niels E Ebbehøj, Anja J Huusom, Keld A Jensen, Ulla B Vogel, Jorid B Sørli","doi":"10.3390/jox14020039","DOIUrl":"10.3390/jox14020039","url":null,"abstract":"<p><p>Waterproofing sprays can cause acute respiratory symptoms after inhalation, including coughing and dyspnoea shortly after use. Here, we describe two cases where persons used the same brand of waterproofing spray product. In both cases the persons followed the instructions on the product and maximized the ventilation by opening windows and doors; however, they still became affected during the application of the product. Products with the same batch number as that used in one case were tested for their effect on respiration patterns of mice in whole-body plethysmographs and lung surfactant function inhibition in vitro. The product was used in spraying experiments to determine the particle size distribution of the aerosol, both using a can from one case and a can with an identical batch number. In addition, the aerosols in the mouse exposure chamber were measured. Aerosol data from a small-scale exposure chamber and data on the physical and temporal dimensions of the spraying during one case were used to estimate the deposited dose during the spraying events. All collected data point to the spraying of the waterproofing product being the reason that two people became ill, and that the inhibition of lung surfactant function was a key component of this illness.</p>","PeriodicalId":42356,"journal":{"name":"Journal of Xenobiotics","volume":"14 2","pages":"679-689"},"PeriodicalIF":6.8,"publicationDate":"2024-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11204789/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141451778","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Melissa I Ortiz-Román, Ileska M Casiano-Muñiz, Felix R Román-Velázquez
{"title":"Toxicity of UV Filter Benzophenone-3 in Brine Shrimp Nauplii (<i>Artemia salina</i>) and Zebrafish (<i>Danio rerio</i>) Embryos.","authors":"Melissa I Ortiz-Román, Ileska M Casiano-Muñiz, Felix R Román-Velázquez","doi":"10.3390/jox14020032","DOIUrl":"10.3390/jox14020032","url":null,"abstract":"<p><p>The benzophenone (BP) family, including oxybenzone (BP-3), a prevalent sunscreen ingredient and environmental contaminant, has raised concerns since the year 2005. This study investigated oxybenzone toxicity in zebrafish (<i>Danio rerio</i>) eleutheroembryos and brine shrimp (<i>Artemia salina</i>) nauplii, focusing on the LC<sub>50</sub> and developmental impacts. Zebrafish embryos (0.100-1.50 mg/L BP-3, 96 h) and <i>A. salina</i> (0.100-5.00 mg/L BP-3, 48 h) were tested with ultrasound-assisted emulsified liquid-phase microextraction (UA-ELPME) used for zebrafish tissue analysis. HPLC-DAD determined BP-3 concentrations (highest: 0.74 ± 0.13 mg/L). Although no significant zebrafish embryo mortality or hatching changes occurred, developmental effects were evident. Lethal concentrations were determined (<i>A. salina</i> LC<sub>50</sub> at 24 h = 3.19 ± 2.02 mg/L; <i>D. rerio</i> embryos LC<sub>50</sub> at 24 h = 4.19 ± 3.60 mg/L), with malformations indicating potential teratogenic effects. <i>A. salina</i> displayed intestinal tract alterations and <i>D. rerio</i> embryos exhibited pericardial edema and spinal deformities. These findings highlight oxybenzone's environmental risks, posing threats to species and ecosystem health.</p>","PeriodicalId":42356,"journal":{"name":"Journal of Xenobiotics","volume":"14 2","pages":"537-553"},"PeriodicalIF":6.0,"publicationDate":"2024-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11130858/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141157167","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Association of Combined PFOA, PFOS, Metals and Allostatic Load on Hepatic Disease Risk.","authors":"Mary Balogun, Emmanuel Obeng-Gyasi","doi":"10.3390/jox14020031","DOIUrl":"10.3390/jox14020031","url":null,"abstract":"<p><p>This study utilizes the National Health and Nutrition Examination Survey (NHANES) 2017-2018 data to explore the relationship between exposure to perfluoroalkyl substances (specifically perfluorooctanoic acid (PFOA) and perfluorooctanesulfonic acid (PFOS), metals lead (Pb), mercury (Hg), and cadmium (Cd), allostatic load, and hepatic disease markers, including the fatty liver index a measure of the likelihood of non-alcoholic fatty liver disease, aspartate aminotransferase (AST), alanine aminotransferase (ALT), alkaline phosphatase (ALP), and total bilirubin. The paper identified significant associations and interaction effects by employing descriptive statistics, Spearman's correlation analysis, linear regression, and Bayesian kernel machine regression (BKMR). Descriptive statistics highlight sex-specific differences in contaminant levels. Spearman's analysis underscores strong correlations among metals and per- and polyfluoroalkyl substances (PFAS). Linear regression reveals significant impacts of specific contaminants on AST, ALT, ALP, and bilirubin levels, adjusting for age and alcohol consumption. BKMR results further elucidate the complex, potentially synergistic relationships between these environmental exposures and the likelihood of non-alcoholic fatty liver disease, offering nuanced insights into their combined effects on liver health. The findings emphasize the intricate dynamics of environmental exposures on hepatic function, advocating for targeted public health interventions.</p>","PeriodicalId":42356,"journal":{"name":"Journal of Xenobiotics","volume":"14 2","pages":"516-536"},"PeriodicalIF":6.0,"publicationDate":"2024-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11130830/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141157009","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Effects of Acute and Developmental Exposure to Bisphenol S on Chinese Medaka (<i>Oryzias sinensis</i>).","authors":"Bingying Li, Yongsi Huang, Duan Pi, Xiang Li, Yafen Guo, Zhiying Liang, Xiaohong Song, Junjie Wang, Xuegeng Wang","doi":"10.3390/jox14020027","DOIUrl":"10.3390/jox14020027","url":null,"abstract":"<p><p>Bisphenol S (BPS), one of the substitutes for bisphenol A (BPA), is widely used in various commodities. The BPS concentrations in surface water have gradually increased in recent years, making it a predominant bisphenol analogue in the aquatic environment and raising concerns about its health and ecological effects on aquatic organisms. For this study, we conducted a 96 h acute toxicity test and a 15-day developmental exposure test to assess the adverse effects of BPS exposure in Chinese medaka (<i>Oryzias sinensis</i>), a new local aquatic animal model. The results indicate that the acute exposure of Chinese medaka embryos to BPS led to relatively low toxicity. However, developmental exposure to BPS was found to cause developmental abnormalities, such as decreased hatching rate and body length, at 15 dpf. A transcriptome analysis showed that exposure to different concentrations of bisphenol S often induced different reactions. In summary, environmental concentrations of BPS can have adverse effects on the hatching and physical development of Chinese medaka, and further attention needs to be paid to the potential toxicity of environmental BPS.</p>","PeriodicalId":42356,"journal":{"name":"Journal of Xenobiotics","volume":"14 2","pages":"452-466"},"PeriodicalIF":6.8,"publicationDate":"2024-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10961820/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140207794","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Johanna Romina Zuccoli, María Del Carmen Martínez, Pablo Vallecorsa, Ana María Buzaleh
{"title":"Xenobiotics Triggering Acute Intermittent Porphyria and Their Effect on Mouse Brain Respiratory Complexes.","authors":"Johanna Romina Zuccoli, María Del Carmen Martínez, Pablo Vallecorsa, Ana María Buzaleh","doi":"10.3390/jox14010019","DOIUrl":"10.3390/jox14010019","url":null,"abstract":"<p><p>Heme enzyme dysfunction causes a group of diseases called porphyrias. Particularly, a decrease in porphobilinogen deaminase, involved in the third step of heme biosynthesis, leads to acute intermittent porphyria (AIP). Considering our previous works demonstrating the multiplicity of brain metabolisms affected by porphyrinogenic agents, this study aimed to elucidate whether they cause any alteration on the mitochondrial respiratory chain. The activities of respiratory chain complexes (I to IV) were measured in encephalon mitochondria of <i>CF1</i> male mice receiving volatile anesthetics: isoflurane (2 mL/kg) and sevoflurane (1.5 mL/kg), ethanol (30%), allylisopropylacetamide (AIA) (350 mg/kg), and barbital (167 mg/kg). Moreover, they were compared versus animals with pathological levels of 5-aminolevulinic acid (ALA, 40 mg/kg). Complex I-III activity was induced by isoflurane and decreased by AIA, ethanol, and ALA. Complex II-III activity was increased by sevoflurane and decreased by isoflurane and AIA. Complex II activity was increased by sevoflurane and barbital and decreased by AIA, ethanol, and ALA. Complex IV activity was increased by barbital and ALA and decreased by sevoflurane. The damage to the respiratory chain by ALA could be reflecting the pathophysiological condition of patients with AIP. Better understanding the broad effect of porphyrinogenic drugs and the mechanisms acting on the onset of AIP is vital in translational medicine.</p>","PeriodicalId":42356,"journal":{"name":"Journal of Xenobiotics","volume":"14 1","pages":"308-319"},"PeriodicalIF":6.0,"publicationDate":"2024-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10971141/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140294900","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Dandan Wang, Hong Yu, Xinbei Liu, Li Sun, Xijian Liu, Ruilong Hu, Chao Wang, Yuping Zhuge, Zhihong Xie
{"title":"The Complete Genome Sequence of <i>Bacillus toyonensis</i> Cbmb3 with Polyvinyl Chloride-Degrading Properties.","authors":"Dandan Wang, Hong Yu, Xinbei Liu, Li Sun, Xijian Liu, Ruilong Hu, Chao Wang, Yuping Zhuge, Zhihong Xie","doi":"10.3390/jox14010018","DOIUrl":"10.3390/jox14010018","url":null,"abstract":"<p><p>The accumulation of high amounts of plastic waste in the environment has raised ecological and health concerns, particularly in croplands, and biological degradation presents a promising approach for the sustainable treatment of this issue. In this study, a polyvinyl chloride (PVC)-degrading bacterium was isolated from farmland soil samples attached to waste plastic, utilizing PVC as the sole carbon source. The circular chromosome of the strain Cbmb3, with a length of 5,768,926 bp, was subsequently sequenced. The average GC content was determined to be 35.45%, and a total of 5835 open reading frames were identified. The strain Cbmb3 was designated as <i>Bacillus toyonensis</i> based on phylogenomic analyses and genomic characteristics. The bioinformatic analysis of the Cbmb3 genome revealed putative genes encoding essential enzymes involved in PVC degradation. Additionally, the potential genomic characteristics associated with phytoprobiotic effects, such as the synthesis of indole acetic acid and secondary metabolite synthesis, were also revealed. Overall, the present study provides the first complete genome of <i>Bacillus toyonensis</i> with PVC-degrading properties, suggesting that Cbmb3 is a potential strain for PVC bioremediation and application.</p>","PeriodicalId":42356,"journal":{"name":"Journal of Xenobiotics","volume":"14 1","pages":"295-307"},"PeriodicalIF":6.0,"publicationDate":"2024-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10970875/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140294899","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Susana I L Gomes, Janeck J Scott-Fordsmand, Mónica J B Amorim
{"title":"Iron Oxide (Magnetite)-Based Nanobiomaterial with Medical Applications-Environmental Hazard Assessment Using Terrestrial Model Species.","authors":"Susana I L Gomes, Janeck J Scott-Fordsmand, Mónica J B Amorim","doi":"10.3390/jox14010017","DOIUrl":"10.3390/jox14010017","url":null,"abstract":"<p><p>Nanobiomaterials (NBMs) have tremendous potential applications including in cancer diagnosis and treatment. However, the health and environmental effects of NBMs must be thoroughly assessed to ensure safety. Fe<sub>3</sub>O<sub>4</sub> (magnetite) nanoparticles coated with polyethylene glycol (PEG) and poly (lactic-co-glycolic acid) (PLGA) were one of the focus NBMs within the EU project BIORIMA. Fe<sub>3</sub>O<sub>4</sub> PEG-PLGA has been proposed to be used as a contrast agent in magnetic resonance imaging for the identification of solid tumors and has revealed low cytotoxicity in several cell lines. However, the effects of Fe<sub>3</sub>O<sub>4</sub> PEG-PLGA have not been assessed in terrestrial environments, the eventual final sink of most materials. In the present study, the effects of Fe<sub>3</sub>O<sub>4</sub> PEG-PLGA and its precursor, (un-coated) Fe<sub>3</sub>O<sub>4</sub> NMs, were assessed in soil model invertebrates <i>Enchytraeus crypticus</i> (Oligochaeta) and <i>Folsomia candida</i> (Collembola). The endpoints were survival, reproduction, and size, based on the standard OECD test (28 days) and its extension (56 days). The results showed no toxicity for any of the endpoints evaluated, indicating that the NBM Fe<sub>3</sub>O<sub>4</sub> PEG-PLGA poses no unacceptable risk to the terrestrial environment.</p>","PeriodicalId":42356,"journal":{"name":"Journal of Xenobiotics","volume":"14 1","pages":"285-294"},"PeriodicalIF":6.0,"publicationDate":"2024-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10971733/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140294898","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Eunice Nuwamanya, Denis Byamugisha, Caroline K Nakiguli, Christopher Angiro, Alice V Khanakwa, Timothy Omara, Simon Ocakacon, Patrick Onen, Daniel Omoding, Boniface Opio, Daniel Nimusiima, Emmanuel Ntambi
{"title":"Exposure and Health Risks Posed by Potentially Toxic Elements in Soils of Metal Fabrication Workshops in Mbarara City, Uganda.","authors":"Eunice Nuwamanya, Denis Byamugisha, Caroline K Nakiguli, Christopher Angiro, Alice V Khanakwa, Timothy Omara, Simon Ocakacon, Patrick Onen, Daniel Omoding, Boniface Opio, Daniel Nimusiima, Emmanuel Ntambi","doi":"10.3390/jox14010011","DOIUrl":"10.3390/jox14010011","url":null,"abstract":"<p><p>Metal fabrication workshops (MFWs) are common businesses in Ugandan cities, and especially those producing metallic security gates, window and door frames (burglar-proof), and balcony and staircase rails. The objective of this study was to comparatively assess the pollution levels and potential health risks of manganese (Mn), chromium (Cr), cadmium (Cd), lead (Pd) and nickel (Ni) in pooled surface soil samples from four 5-, 7-, 8-, and 10-year-old MFWs (<i>n</i> = 28) and a control site (<i>n</i> = 8) in Mbarara City, Uganda. The concentration of the potentially toxic elements (PTEs) was determined using inductively coupled plasma-optical emission spectrometry. Contamination, ecological, and human health risk assessment indices and models were used to identify any risks that the PTEs could pose to the pristine environment and humans. Our results showed that PTE pollution of soils is occuring in the MFWs than at the control site. The mean concentrations of the PTEs (mg kg<sup>-1</sup>) in the samples were: Mn (2012.75 ± 0.23-3377.14 ± 0.31), Cr (237.55 ± 0.29-424.93 ± 0.31), Cd (0.73 ± 0.13-1.29 ± 0.02), Pb (107.80 ± 0.23-262.01 ± 0.19), and Ni (74.85 ± 0.25-211.37 ± 0.14). These results indicate that the PTEs could plausibly derive from the fabrication activities in these workshops, which is supported by the high values of contamination factors, index of geoaccumulation, and the overall increase in pollution load indices with the number of years of operation of the MFWs. Human health risk assessment showed that there are non-carcinogenic health risks that could be experienced by children who ingest PTEs in the soils from the 7-, 8- and 10-year-old MFWs. The incremental life cancer risk assessment suggested that there are potential cancerous health effects of Cd and Ni that could be experienced in children (who ingest soils from all the four MFWs) and adults (ingesting soils from the 8- and 10-year-old MFWs). This study underscores the need to implement regulatory guidelines on the operation and location of MFWs in Uganda. Further research should be undertaken to investigate the emission of the PTEs during welding operations in the MFWs.</p>","PeriodicalId":42356,"journal":{"name":"Journal of Xenobiotics","volume":"14 1","pages":"176-192"},"PeriodicalIF":6.0,"publicationDate":"2024-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10885048/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139933444","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}