Microplastics (MPs) have received great concern in recent years, and whether the bacteria carried by traveling MPs would cause ecological risks is a hot topic for debate. The colonized bacteria (i.e., hitchhikers) on traveling MPs which become invasive species in the new environment, need to be completed in three steps: arriving, falling, and growing. However, most previous studies only focused on the first step, which we think is insufficient to discuss species invasion. Thus, in this frontier review, we reviewed the progress of the current research on the uniqueness of bacterial communities on MPs, and we summarized that the uniqueness of the plastisphere was not as high as previously thought. Moreover, we explained why the three steps were necessary to complete the bacterial species invasion. Furthermore, we analyzed the technical difficulties hindering discussing MPs as invasive species carriers, as well as the perspectives in future research. Therefore, this frontier review presents new insights into the role of MPs as bacterial carriers, and suggests study directions for future research.
{"title":"Hitchhikers on traveling microplastics: Three necessary steps for bacteria becoming dangerous invaders","authors":"Xiaohan Zhang , Ying Zhang , Yongzheng Ma , Zhiguang Niu","doi":"10.1016/j.hazl.2024.100133","DOIUrl":"10.1016/j.hazl.2024.100133","url":null,"abstract":"<div><div>Microplastics (MPs) have received great concern in recent years, and whether the bacteria carried by traveling MPs would cause ecological risks is a hot topic for debate. The colonized bacteria (i.e., hitchhikers) on traveling MPs which become invasive species in the new environment, need to be completed in three steps: arriving, falling, and growing. However, most previous studies only focused on the first step, which we think is insufficient to discuss species invasion. Thus, in this frontier review, we reviewed the progress of the current research on the uniqueness of bacterial communities on MPs, and we summarized that the uniqueness of the plastisphere was not as high as previously thought. Moreover, we explained why the three steps were necessary to complete the bacterial species invasion. Furthermore, we analyzed the technical difficulties hindering discussing MPs as invasive species carriers, as well as the perspectives in future research. Therefore, this frontier review presents new insights into the role of MPs as bacterial carriers, and suggests study directions for future research.</div></div>","PeriodicalId":93463,"journal":{"name":"Journal of hazardous materials letters","volume":"5 ","pages":"Article 100133"},"PeriodicalIF":6.6,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142651888","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}
Pub Date : 2024-11-01DOI: 10.1016/j.hazl.2024.100134
Phong H.N. Vo , Christian Vogel , Hong T.M. Nguyen , Brett R. Hamilton , Phong K. Thai , Philipp Roesch , Franz-Georg Simon , Jochen F. Mueller
An improved understanding of the distribution of per- and polyfluoroalkyl substances (PFAS) in PFAS-impacted concrete is important for risk management and decontamination of PFAS. This study incorporates µ-X-ray fluorescence (µ-XRF) and fluorine K-edge µ-X-ray absorption near-edge structure (µ-XANES) spectroscopy to gain non-destructive insights into PFAS distribution in the impacted concrete. The μ-XRF and μ-XANES spectroscopy provided additional details on the detection of PFAS, which were not detected by the desorption electrospray ionization (DESI) imaging method conducted previously. The shorter chain PFAS were found on the top part of the concrete core (0.5 cm), and longer chain PFAS were mostly at the bottom part of the concrete core (5 cm). The inorganic fluorine fraction was also detected, and it likely hampered the detection of organic fluorine such as PFAS in the concrete. Thus, this non-destructive technique is an complementary approach to detect PFAS in contaminated concrete.
{"title":"µ-X-ray fluorescence (XRF) and fluorine K-edge µ-X-ray absorption near-edge structure (XANES) spectroscopy for detection of PFAS distribution in the impacted concrete","authors":"Phong H.N. Vo , Christian Vogel , Hong T.M. Nguyen , Brett R. Hamilton , Phong K. Thai , Philipp Roesch , Franz-Georg Simon , Jochen F. Mueller","doi":"10.1016/j.hazl.2024.100134","DOIUrl":"10.1016/j.hazl.2024.100134","url":null,"abstract":"<div><div>An improved understanding of the distribution of per- and polyfluoroalkyl substances (PFAS) in PFAS-impacted concrete is important for risk management and decontamination of PFAS. This study incorporates µ-X-ray fluorescence (µ-XRF) and fluorine K-edge µ-X-ray absorption near-edge structure (µ-XANES) spectroscopy to gain non-destructive insights into PFAS distribution in the impacted concrete. The μ-XRF and μ-XANES spectroscopy provided additional details on the detection of PFAS, which were not detected by the desorption electrospray ionization (DESI) imaging method conducted previously. The shorter chain PFAS were found on the top part of the concrete core (0.5 cm), and longer chain PFAS were mostly at the bottom part of the concrete core (5 cm). The inorganic fluorine fraction was also detected, and it likely hampered the detection of organic fluorine such as PFAS in the concrete. Thus, this non-destructive technique is an complementary approach to detect PFAS in contaminated concrete.</div></div>","PeriodicalId":93463,"journal":{"name":"Journal of hazardous materials letters","volume":"5 ","pages":"Article 100134"},"PeriodicalIF":6.6,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142651892","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}
Pub Date : 2024-11-01DOI: 10.1016/j.hazl.2024.100135
Nannan Wan , Bo Zhou , Limin Mo , Qiyu Wang , Shuai Liu , Miao Zhang , Yu Liu , Xiaojun Luo , Bixian Mai
Studies on the distribution characteristics and environmental relevance of per- and polyfluoroalkyl substances (PFAS) in waterbird feathers are scarce. In the present study, the concentrations of twenty-three PFAS in the remiges, coverts, body, down, and tail feathers of three common species of Ardeidae (little egret, grey heron, and Chinese pond-heron) in Poyang Lake were investigated. The total PFAS concentrations in the pinna and scapus were 38 – 42 ng/g dry weight (dw) and 21 – 38 ng/g dw, respectively; long-chain C9–14 perfluorocarboxylic acids were abundant in all feathers. Most PFAS accumulated in the pinna; however, perfluorohexane sulfonic acid and perfluorooctane sulfonamide were predominant in the scapus. The PFAS concentrations were higher in the tail and flight feathers than in the cover and body feathers. Furthermore, the concentrations of PFAS in waterbird feathers were comparable with those in fish and higher than those in benthic invertebrates, all of which originated from Poyang Lake. The PFAS profiles in feathers were significantly and positively correlated with those in fish (r > 0.71) and benthos (r > 0.43). These results suggest that waterbird feather is a suitable biomonitor of PFAS contamination in regional freshwater ecosystems.
{"title":"Per- and polyfluoroalkyl substances in feathers of waterbirds (Ardeidae) from Poyang Lake, China: Bioaccumulation, distribution, and environmental relevance","authors":"Nannan Wan , Bo Zhou , Limin Mo , Qiyu Wang , Shuai Liu , Miao Zhang , Yu Liu , Xiaojun Luo , Bixian Mai","doi":"10.1016/j.hazl.2024.100135","DOIUrl":"10.1016/j.hazl.2024.100135","url":null,"abstract":"<div><div>Studies on the distribution characteristics and environmental relevance of per- and polyfluoroalkyl substances (PFAS) in waterbird feathers are scarce. In the present study, the concentrations of twenty-three PFAS in the remiges, coverts, body, down, and tail feathers of three common species of Ardeidae (little egret, grey heron, and Chinese pond-heron) in Poyang Lake were investigated. The total PFAS concentrations in the pinna and scapus were 38 – 42 ng/g dry weight (dw) and 21 – 38 ng/g dw, respectively; long-chain C<sub>9–14</sub> perfluorocarboxylic acids were abundant in all feathers. Most PFAS accumulated in the pinna; however, perfluorohexane sulfonic acid and perfluorooctane sulfonamide were predominant in the scapus. The PFAS concentrations were higher in the tail and flight feathers than in the cover and body feathers. Furthermore, the concentrations of PFAS in waterbird feathers were comparable with those in fish and higher than those in benthic invertebrates, all of which originated from Poyang Lake. The PFAS profiles in feathers were significantly and positively correlated with those in fish (r > 0.71) and benthos (r > 0.43). These results suggest that waterbird feather is a suitable biomonitor of PFAS contamination in regional freshwater ecosystems.</div></div>","PeriodicalId":93463,"journal":{"name":"Journal of hazardous materials letters","volume":"5 ","pages":"Article 100135"},"PeriodicalIF":6.6,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142651891","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}
Pub Date : 2024-10-20DOI: 10.1016/j.hazl.2024.100132
Aqsa Pervaiz , Sohail Anjum Shahzad , Mohammed A. Assiri , Tayyeba Javid , Hasher Irshad , Katrine Qvortrup
Isopthalamide based probe DPI has been synthesized by an easy two-step substitution reaction. Unique fluorescence properties of probe DPI were exploited for sensing of CNˉ and chloroform. Various spectroscopic techniques such as NMR, LC-MS, SEM, DLS, UV-Vis. and fluorescence spectroscopy in combination with DFT studies were used to confirm efficient detection of CN‾ through a non-covalent interaction of cyanide with probe. Furthermore, probe showed fluorescence emission at 360 nm which shifted significantly to 415 nm upon addition of water exhibiting unique AIE characteristics and formation of desired J-aggregates. Mechanistically, CN‾ and chloroform were selectively detected through fluorescence quenching with 9 nM and 0.2 % v/v limit of detection (LOD), respectively. Photoinduced electron transfer (PET) was proven to be involved as a sensing mechanism. Moreover, DPI exhibited interesting solvatochromism properties. DPI was proven to be a highly sensitive probe which showed solid-state and vapor phase on-field detection of CN‾. Similar sensing behavior of DPI probe towards CN‾ was seen in food and water samples.
{"title":"Cyanide and chloroform detection through J-aggregates based aggregation induced emission probe with real sample applications","authors":"Aqsa Pervaiz , Sohail Anjum Shahzad , Mohammed A. Assiri , Tayyeba Javid , Hasher Irshad , Katrine Qvortrup","doi":"10.1016/j.hazl.2024.100132","DOIUrl":"10.1016/j.hazl.2024.100132","url":null,"abstract":"<div><div>Isopthalamide based probe <strong>DPI</strong> has been synthesized by an easy two-step substitution reaction. Unique fluorescence properties of probe <strong>DPI</strong> were exploited for sensing of CNˉ and chloroform. Various spectroscopic techniques such as NMR, LC-MS, SEM, DLS, UV-<em>Vis</em>. and fluorescence spectroscopy in combination with DFT studies were used to confirm efficient detection of CN‾ through a non-covalent interaction of cyanide with probe. Furthermore, probe showed fluorescence emission at 360 nm which shifted significantly to 415 nm upon addition of water exhibiting unique AIE characteristics and formation of desired J-aggregates. Mechanistically, CN‾ and chloroform were selectively detected through fluorescence quenching with 9 nM and 0.2 % v/v limit of detection (LOD), respectively. Photoinduced electron transfer (PET) was proven to be involved as a sensing mechanism. Moreover, <strong>DPI</strong> exhibited interesting solvatochromism properties. <strong>DPI</strong> was proven to be a highly sensitive probe which showed solid-state and vapor phase on-field detection of CN‾. Similar sensing behavior of <strong>DPI</strong> probe towards CN‾ was seen in food and water samples.</div></div>","PeriodicalId":93463,"journal":{"name":"Journal of hazardous materials letters","volume":"5 ","pages":"Article 100132"},"PeriodicalIF":6.6,"publicationDate":"2024-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142529683","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}
Pub Date : 2024-10-05DOI: 10.1016/j.hazl.2024.100128
João Pereira Santos , David Amouroux , Vera I. Slaveykova
Bioaccumulation of dissolved elemental mercury (DGM) by various organisms has been demonstrated, but no study has shown its uptake and sequestration by phytoplankton species. The present study aims to investigate the accumulation of mercury by phytoplankton species exposed to DGM. Diatoms (Cyclotella meneghiniana and Navicula pelliculosa) and green algae (Chlamydomonas reinhardtii and Haematococcus pluvialis) were exposed to constant high level of atmospheric gaseous Hg (∼7.7 µg m−3). Total mercury concentrations (THg) in the medium (dissolved fraction) and algae cells (cellular fraction) were determined using cold vapor atomic fluorescence spectroscopy. Results revealed a partitioning of Hg(0) between the atmosphere and phytoplankton cultures, with THg predominantly found in the algae cells. THg in the algae cultures decreased in the order: C. reinhardtii > H. pluvialis > N. pelliculosa > C. meneghiniana. However, the cellular concentration (mol cell−1) decreased in the order: H. pluvialis > C. reinhardtii > C. meneghiniana > N. pelliculosa. These results highlight species specificity in Hg accumulation upon exposure to DGM, further linked to the phytoplankton surface area. Our findings reveal for the first time that phytoplankton species significantly influence the partitioning of atmospheric Hg(0) in aquatic environments, with important implications for the understanding of the aquatic mercury cycle.
各种生物对溶解元素汞（DGM）的生物累积已得到证实，但还没有研究显示浮游植物物种对其的吸收和固存。本研究旨在调查暴露于 DGM 的浮游植物物种的汞积累情况。硅藻（Cyclotella meneghiniana 和 Navicula pelliculosa）和绿藻（Chlamydomonas reinhardtii 和 Haematococcus pluvialis）持续暴露于高浓度大气气态汞（∼7.7 µg m-3）中。采用冷蒸气原子荧光光谱法测定了培养基（溶解部分）和藻细胞（细胞部分）中的总汞浓度（THg）。结果显示，Hg(0) 在大气和浮游植物培养物之间分配，THg 主要存在于藻类细胞中。藻类培养物中的 THg 依次减少：C. reinhardtii > H. pluvialis > N. pelliculosa > C. meneghiniana。然而，细胞浓度（mol cell-1）依次下降：H. pluvialis > C. reinhardtii > C. meneghiniana > N. pelliculosa。这些结果突显了暴露于 DGM 后汞积累的物种特异性，并与浮游植物的表面积进一步相关。我们的研究结果首次揭示了浮游植物物种对水生环境中大气汞分配的重要影响，这对了解水生汞循环具有重要意义。
{"title":"Dissolved elemental mercury accumulation by freshwater phytoplankton species: A pilot study","authors":"João Pereira Santos , David Amouroux , Vera I. Slaveykova","doi":"10.1016/j.hazl.2024.100128","DOIUrl":"10.1016/j.hazl.2024.100128","url":null,"abstract":"<div><div>Bioaccumulation of dissolved elemental mercury (DGM) by various organisms has been demonstrated, but no study has shown its uptake and sequestration by phytoplankton species. The present study aims to investigate the accumulation of mercury by phytoplankton species exposed to DGM. Diatoms (<em>Cyclotella meneghiniana</em> and <em>Navicula pelliculosa</em>) and green algae (<em>Chlamydomonas reinhardtii</em> and <em>Haematococcus pluvialis</em>) were exposed to constant high level of atmospheric gaseous Hg (∼7.7 µg m<sup>−3</sup>). Total mercury concentrations (THg) in the medium (dissolved fraction) and algae cells (cellular fraction) were determined using cold vapor atomic fluorescence spectroscopy. Results revealed a partitioning of Hg(0) between the atmosphere and phytoplankton cultures, with THg predominantly found in the algae cells. THg in the algae cultures decreased in the order: <em>C. reinhardtii</em> > <em>H. pluvialis</em> > <em>N. pelliculosa</em> > <em>C. meneghiniana</em>. However, the cellular concentration (mol cell<sup>−1</sup>) decreased in the order: <em>H. pluvialis</em> > <em>C. reinhardtii</em> > <em>C. meneghiniana</em> > <em>N. pelliculosa.</em> These results highlight species specificity in Hg accumulation upon exposure to DGM, further linked to the phytoplankton surface area. Our findings reveal for the first time that phytoplankton species significantly influence the partitioning of atmospheric Hg(0) in aquatic environments, with important implications for the understanding of the aquatic mercury cycle.</div></div>","PeriodicalId":93463,"journal":{"name":"Journal of hazardous materials letters","volume":"5 ","pages":"Article 100128"},"PeriodicalIF":6.6,"publicationDate":"2024-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142417205","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}
Pub Date : 2024-10-05DOI: 10.1016/j.hazl.2024.100131
Liane Carmen Ruszczyk , Gabriel Tochetto , Adriana Dervanoski , Gean Delise Leal Pasquali
This study investigates the efficacy of activated carbon derived from coconut shells for the removal of Triclosan (TCS) from aqueous solutions. Experimental results demonstrate the impressive efficiency of coconut shell-derived activated carbon in eliminating TCS from water. Statistical analysis underscores the significant role of agitation in enhancing adsorption efficiency, with increased agitation leading to higher contaminant removal rates. Equilibrium is rapidly achieved, with removal efficiencies exceeding 85 %. Kinetic analysis reveals rapid adsorption kinetics, predominantly following the pseudo-second-order model. Additionally, intraparticle diffusion analyses provide insights into TCS diffusion within activated carbon pores, highlighting its dependence on solute concentration. These findings underscore the potential of coconut shell-derived activated carbon as a viable solution for mitigating TCS contamination in water sources, contributing to the development of effective water treatment strategies.
{"title":"Kinetic modeling and optimization of triclosan adsorption onto coconut shell activated carbon","authors":"Liane Carmen Ruszczyk , Gabriel Tochetto , Adriana Dervanoski , Gean Delise Leal Pasquali","doi":"10.1016/j.hazl.2024.100131","DOIUrl":"10.1016/j.hazl.2024.100131","url":null,"abstract":"<div><div>This study investigates the efficacy of activated carbon derived from coconut shells for the removal of Triclosan (TCS) from aqueous solutions. Experimental results demonstrate the impressive efficiency of coconut shell-derived activated carbon in eliminating TCS from water. Statistical analysis underscores the significant role of agitation in enhancing adsorption efficiency, with increased agitation leading to higher contaminant removal rates. Equilibrium is rapidly achieved, with removal efficiencies exceeding 85 %. Kinetic analysis reveals rapid adsorption kinetics, predominantly following the pseudo-second-order model. Additionally, intraparticle diffusion analyses provide insights into TCS diffusion within activated carbon pores, highlighting its dependence on solute concentration. These findings underscore the potential of coconut shell-derived activated carbon as a viable solution for mitigating TCS contamination in water sources, contributing to the development of effective water treatment strategies.</div></div>","PeriodicalId":93463,"journal":{"name":"Journal of hazardous materials letters","volume":"5 ","pages":"Article 100131"},"PeriodicalIF":6.6,"publicationDate":"2024-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142417206","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}
Pub Date : 2024-10-02DOI: 10.1016/j.hazl.2024.100129
Le Thanh Thao , Vu Thi Thu Hien , Nguyen Thuy Tram , Vo Hoai Hieu , Tony Gutierrez , Hoang Thi Thu Ha , Pham My Dung , Ngo Thi Thuy Huong
This study investigated the relationship between MiPs, antibiotic resistance genes (ARGs), and water quality in the Red River Delta. MiPs were collected from water samples at four locations: Hanoi, Ha Nam, Nam Dinh, and Cat Ba Island. Bacteria isolated from MiPs and the surrounding water were analyzed for β-lactamase genes. Polyethylene terephthalate (PET) and polytridecanolactone (PTDL) exhibited notable correlations with coefficients with microbial abundance on MiPs. Aeromonas (99.2 % of all isolates) were the most common bacteria isolated from MiPs, with a fewer Escherichia coli (0.83 %). Of 207 bacterial strains isolated from microplastic, 23 (~11 % of total) were found to carry antibiotic resistance genes, mostly blaTEM (13/23; 56.5 %), blaSHV (9/23; 39.1 %) and blaCTXM-9 (1/23; 4.3 %). All seven environmental factors measured were found to affect the distribution of ARGs and ARBs on MiP surfaces. Chlorophyll-a showed a strong positive correlation with ARB abundance, suggesting a potential link between primary productivity and bacterial colonization. This study is one of the first to report the association of MPs with antibiotic-resistant microbiota and genes. The presence of ARGs on MiPs in areas with high human population highlights the need for effective pollution management strategies to mitigate the risks associated with AMR.
{"title":"First evidence of microplastic-associated extended-spectrum beta-lactamase (ESBL)-producing bacteria in the Red River Delta, Vietnam","authors":"Le Thanh Thao , Vu Thi Thu Hien , Nguyen Thuy Tram , Vo Hoai Hieu , Tony Gutierrez , Hoang Thi Thu Ha , Pham My Dung , Ngo Thi Thuy Huong","doi":"10.1016/j.hazl.2024.100129","DOIUrl":"10.1016/j.hazl.2024.100129","url":null,"abstract":"<div><div>This study investigated the relationship between MiPs, antibiotic resistance genes (ARGs), and water quality in the Red River Delta. MiPs were collected from water samples at four locations: Hanoi, Ha Nam, Nam Dinh, and Cat Ba Island. Bacteria isolated from MiPs and the surrounding water were analyzed for β-lactamase genes. Polyethylene terephthalate (PET) and polytridecanolactone (PTDL) exhibited notable correlations with coefficients with microbial abundance on MiPs. <em>Aeromonas</em> (99.2 % of all isolates) were the most common bacteria isolated from MiPs, with a fewer <em>Escherichia coli</em> (0.83 %). Of 207 bacterial strains isolated from microplastic, 23 (~11 % of total) were found to carry antibiotic resistance genes, mostly <em>bla</em><sub>TEM</sub> (13/23; 56.5 %), <em>bla</em><sub>SHV</sub> (9/23; 39.1 %) and <em>bla</em><sub>CTXM</sub>-9 (1/23; 4.3 %). All seven environmental factors measured were found to affect the distribution of ARGs and ARBs on MiP surfaces. Chlorophyll-a showed a strong positive correlation with ARB abundance, suggesting a potential link between primary productivity and bacterial colonization. This study is one of the first to report the association of MPs with antibiotic-resistant microbiota and genes. The presence of ARGs on MiPs in areas with high human population highlights the need for effective pollution management strategies to mitigate the risks associated with AMR.</div></div>","PeriodicalId":93463,"journal":{"name":"Journal of hazardous materials letters","volume":"5 ","pages":"Article 100129"},"PeriodicalIF":6.6,"publicationDate":"2024-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142529682","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}
Pub Date : 2024-10-02DOI: 10.1016/j.hazl.2024.100130
Sutanu Karmakar , Kundan Kumar , T.J. Abraham , Saurav Kumar , Sanath Kumar , S.P. Shukla , Biswadeep Dey
The study assessed the efficiency of in-vitro oxytetracycline (OTC) exposure on antimicrobial resistance (AMR) development in aquatic bacteria. Aeromonas hydrophila ATCC 49140 and Edwardsiella tarda ATCC 15947 were serially passaged to OTC for short and long durations. Short duration OTC exposure (30 min) at 0, 0.097 (0.25× Minimum Inhibitory Concentration: MIC), 0.195 (0.5× MIC) and 0.39 µg mL−1 (1× MIC) elicited high mutation rate in A. hydrophila (10−4) and E. tarda (10−2). Serial passage exposure to inhibitory concentration of OTC (0.39 µg mL−1) reduced the zone of inhibition of nitrofurantoin (NIT) for A. hydrophila and of tetracycline, NIT and gentamicin for E. tarda to a clinically significant level. The upsurge in MICs of OTC was 4-folds (1.56 µg mL−1) and 8-folds (3.12 µg mL−1) in A. hydrophila and E. tarda, respectively during serial passage exposure to 0.097, 0.195 and 0.39 µg mL−1 OTC. OTC exposure also increased the MICs of biocide triclosan (TCS) >4-folds (>100 µg mL−1) in A. hydrophila without any concentration-dependent pattern. This study shows that environmental OTC levels can drive bacterial mutation and AMR, potentially leading to cross-resistance to biocides like TCS. Reducing OTC use and improving disposal could help limit AMR spread through better antimicrobial management.
{"title":"The role of environmentally relevant concentrations of oxytetracycline in the emergence of antimicrobial resistance in Aeromonas hydrophila and Edwardsiella tarda","authors":"Sutanu Karmakar , Kundan Kumar , T.J. Abraham , Saurav Kumar , Sanath Kumar , S.P. Shukla , Biswadeep Dey","doi":"10.1016/j.hazl.2024.100130","DOIUrl":"10.1016/j.hazl.2024.100130","url":null,"abstract":"<div><div>The study assessed the efficiency of <em>in-vitro</em> oxytetracycline (OTC) exposure on antimicrobial resistance (AMR) development in aquatic bacteria. <em>Aeromonas hydrophila</em> ATCC 49140 and <em>Edwardsiella tarda</em> ATCC 15947 were serially passaged to OTC for short and long durations. Short duration OTC exposure (30 min) at 0, 0.097 (0.25× Minimum Inhibitory Concentration: MIC), 0.195 (0.5× MIC) and 0.39 µg mL<sup>−1</sup> (1× MIC) elicited high mutation rate in <em>A. hydrophila</em> (10<sup>−4</sup>) and <em>E. tarda</em> (10<sup>−2</sup>). Serial passage exposure to inhibitory concentration of OTC (0.39 µg mL<sup>−1</sup>) reduced the zone of inhibition of nitrofurantoin (NIT) for <em>A. hydrophila</em> and of tetracycline, NIT and gentamicin for <em>E. tarda</em> to a clinically significant level. The upsurge in MICs of OTC was 4-folds (1.56 µg mL<sup>−1</sup>) and 8-folds (3.12 µg mL<sup>−1</sup>) in <em>A. hydrophila</em> and <em>E. tarda,</em> respectively during serial passage exposure to 0.097, 0.195 and 0.39 µg mL<sup>−1</sup> OTC. OTC exposure also increased the MICs of biocide triclosan (TCS) >4-folds (>100 µg mL<sup>−1</sup>) in <em>A. hydrophila</em> without any concentration-dependent pattern. This study shows that environmental OTC levels can drive bacterial mutation and AMR, potentially leading to cross-resistance to biocides like TCS. Reducing OTC use and improving disposal could help limit AMR spread through better antimicrobial management.</div></div>","PeriodicalId":93463,"journal":{"name":"Journal of hazardous materials letters","volume":"5 ","pages":"Article 100130"},"PeriodicalIF":6.6,"publicationDate":"2024-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142417204","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}
Our study investigates the interactions between nanoscale Metal-Organic Frameworks (nMOFs), specifically ZIF-8 and CuIm, and key enzymes: Acetylcholine Esterase (AChE), α-amylase. Using circular dichroism (CD) spectroscopy, we observed significant alterations in the secondary structures of these enzymes upon interaction with nMOFs. AChE showed a reduction in α-helix content from 20.1 % to a significantly lower value when exposed to 160 µg/mL of nMOFs, with a corresponding increase in β-sheet and other structural components. Enzymatic activity assays revealed that CuIm nMOFs decreased AChE activity by 67.08 % at the highest concentration tested (160 µg/mL). ZIF-8 also affected AChE activity significantly at this concentration. Similarly, α-amylase exhibited structural changes, with increasing concentrations of nMOFs leading to a near-total loss of secondary structure at 80 and 160 µg/mL. These structural changes were accompanied by a marked decrease in enzymatic activity, particularly with CuIm nMOFs showing the most substantial inhibitory effects. Our findings highlight the profound impact of nMOFs on enzyme structures and functions, emphasising the need for comprehensive assessments of nMOFs' potential toxicity and understanding the aspects of their safety-by-design.
{"title":"Perturbation of enzyme structure by nano-metal organic frameworks: A question mark on their safety-by-design?","authors":"Swaroop Chakraborty , Bashiru Ibrahim , Pankti Dhumal , Nathan Langford , Lauren Garbett , Eugenia Valsami-Jones","doi":"10.1016/j.hazl.2024.100127","DOIUrl":"10.1016/j.hazl.2024.100127","url":null,"abstract":"<div><div>Our study investigates the interactions between nanoscale Metal-Organic Frameworks (nMOFs), specifically ZIF-8 and CuIm, and key enzymes: Acetylcholine Esterase (AChE), α-amylase. Using circular dichroism (CD) spectroscopy, we observed significant alterations in the secondary structures of these enzymes upon interaction with nMOFs. AChE showed a reduction in α-helix content from 20.1 % to a significantly lower value when exposed to 160 µg/mL of nMOFs, with a corresponding increase in β-sheet and other structural components. Enzymatic activity assays revealed that CuIm nMOFs decreased AChE activity by 67.08 % at the highest concentration tested (160 µg/mL). ZIF-8 also affected AChE activity significantly at this concentration. Similarly, α-amylase exhibited structural changes, with increasing concentrations of nMOFs leading to a near-total loss of secondary structure at 80 and 160 µg/mL. These structural changes were accompanied by a marked decrease in enzymatic activity, particularly with CuIm nMOFs showing the most substantial inhibitory effects. Our findings highlight the profound impact of nMOFs on enzyme structures and functions, emphasising the need for comprehensive assessments of nMOFs' potential toxicity and understanding the aspects of their safety-by-design.</div></div>","PeriodicalId":93463,"journal":{"name":"Journal of hazardous materials letters","volume":"5 ","pages":"Article 100127"},"PeriodicalIF":6.6,"publicationDate":"2024-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2666911024000261/pdfft?md5=a99dc6613db8094ea85d05ed5b2751e9&pid=1-s2.0-S2666911024000261-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142310292","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}
Pub Date : 2024-09-19DOI: 10.1016/j.hazl.2024.100126
Kian-Ghee Tiew
Chromium elements are prevalent in daily life, and millions of tonnes of Chromium Ore Processing Residue (COPR) remain untreated in China, posing significant environmental risks. In search of a cost-effective and environmentally friendly treatment method, this study investigated the potential of black soldier fly larvae (BSFL) as a biological treatment for COPR. Experiments were conducted using BSFL to treat 100 % COPR and a mixture of 50 % COPR with 50 % wheat bran. Post-treatment analysis using ICP-MS, X-ray diffraction (XRD), and scanning electron microscopy revealed a significant reduction of approximately 43 % in COPR dry mass and a decrease in total hexavalent chromium content from 5636 ppm to 563 ppm. The optimal treatment conditions involved mixing 50 % COPR with 50 % wheat bran. The results suggest that BSFL can serve as a sustainable and economically viable biological treatment for hazardous waste such as COPR, offering potential benefits for both the environment and the economy. Further research is needed to explore the mechanisms and effects of BSFL on hazardous waste treatment.
{"title":"Sustainable chromium ore processing residue (COPR) waste treatment with black soldier fly larvae (BSFL)","authors":"Kian-Ghee Tiew","doi":"10.1016/j.hazl.2024.100126","DOIUrl":"10.1016/j.hazl.2024.100126","url":null,"abstract":"<div><div>Chromium elements are prevalent in daily life, and millions of tonnes of Chromium Ore Processing Residue (COPR) remain untreated in China, posing significant environmental risks. In search of a cost-effective and environmentally friendly treatment method, this study investigated the potential of black soldier fly larvae (BSFL) as a biological treatment for COPR. Experiments were conducted using BSFL to treat 100 % COPR and a mixture of 50 % COPR with 50 % wheat bran. Post-treatment analysis using ICP-MS, X-ray diffraction (XRD), and scanning electron microscopy revealed a significant reduction of approximately 43 % in COPR dry mass and a decrease in total hexavalent chromium content from 5636 ppm to 563 ppm. The optimal treatment conditions involved mixing 50 % COPR with 50 % wheat bran. The results suggest that BSFL can serve as a sustainable and economically viable biological treatment for hazardous waste such as COPR, offering potential benefits for both the environment and the economy. Further research is needed to explore the mechanisms and effects of BSFL on hazardous waste treatment.</div></div>","PeriodicalId":93463,"journal":{"name":"Journal of hazardous materials letters","volume":"5 ","pages":"Article 100126"},"PeriodicalIF":6.6,"publicationDate":"2024-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142319496","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}
扫码关注我们
求助内容：
应助结果提醒方式：
京公网安备 11010802042870号