Journal of hazardous materials letters最新文献

Toxicological assessment & risk evaluation of pesticides and their mixtures through C. elegans & RISK21: A risk-based approach for sustainable agriculture

IF 6.6 Q1 ENGINEERING, ENVIRONMENTAL

Journal of hazardous materials letters

Pub Date : 2025-02-12 DOI: 10.1016/j.hazl.2025.100145

Mariana I. Manetti , M. Laura Migliori , M. Florencia Kronberg , Rosana Rota , Aldana Moya , Eduardo A. Pagano , Daniel H. Calvo , Sandrine Deglin , Michelle Embry , Diego A. Golombek , Eliana R. Munarriz

Pesticides are extensively used in agriculture to protect crops, but their environmental release, particularly as mixtures, raises concerns about effects on non-target organisms and ecosystem health. This study aimed to evaluate the toxicity of five pesticides used extensively on soybean crops - glyphosate, 2,4-D, paraquat, chlorpyrifos, and lambda-cyhalothrin- and their binary mixtures on the nematode Caenorhabditis elegans, a model organism in toxicology. Locomotion and growth assays were conducted to assess acute and chronic effects, and the RISK21 matrix framework was used to convey environmental risks based on the bioassay results combined with surface water monitoring data and modeled exposure estimates. Our results demonstrate significant reductions in locomotion and body length for all tested pesticides, with synergistic effects observed in binary mixtures. However, the risk-based analysis suggests that the estimated environmental concentrations of these pesticides pose minimal ecological risks. In conclusion, our work highlights the novelty of combining C. elegans-based toxicity assays in a risk-based approach to evaluate pesticide mixtures, offering a practical approach for predicting environmental impacts and promoting sustainable agriculture.

{"title":"Toxicological assessment & risk evaluation of pesticides and their mixtures through C. elegans & RISK21: A risk-based approach for sustainable agriculture","authors":"Mariana I. Manetti , M. Laura Migliori , M. Florencia Kronberg , Rosana Rota , Aldana Moya , Eduardo A. Pagano , Daniel H. Calvo , Sandrine Deglin , Michelle Embry , Diego A. Golombek , Eliana R. Munarriz","doi":"10.1016/j.hazl.2025.100145","DOIUrl":"10.1016/j.hazl.2025.100145","url":null,"abstract":"<div><div>Pesticides are extensively used in agriculture to protect crops, but their environmental release, particularly as mixtures, raises concerns about effects on non-target organisms and ecosystem health. This study aimed to evaluate the toxicity of five pesticides used extensively on soybean crops - glyphosate, 2,4-D, paraquat, chlorpyrifos, and lambda-cyhalothrin- and their binary mixtures on the nematode <em>Caenorhabditis elegans</em>, a model organism in toxicology. Locomotion and growth assays were conducted to assess acute and chronic effects, and the RISK21 matrix framework was used to convey environmental risks based on the bioassay results combined with surface water monitoring data and modeled exposure estimates. Our results demonstrate significant reductions in locomotion and body length for all tested pesticides, with synergistic effects observed in binary mixtures. However, the risk-based analysis suggests that the estimated environmental concentrations of these pesticides pose minimal ecological risks. In conclusion, our work highlights the novelty of combining <em>C. elegans</em>-based toxicity assays in a risk-based approach to evaluate pesticide mixtures, offering a practical approach for predicting environmental impacts and promoting sustainable agriculture.</div></div>","PeriodicalId":93463,"journal":{"name":"Journal of hazardous materials letters","volume":"6 ","pages":"Article 100145"},"PeriodicalIF":6.6,"publicationDate":"2025-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143419900","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}

引用次数: 0

Visualization and spatial mapping of PFAS in the edible storage root of radish

IF 6.6 Q1 ENGINEERING, ENVIRONMENTAL

Journal of hazardous materials letters

Pub Date : 2025-02-01 DOI: 10.1016/j.hazl.2025.100141

Yuwei Zuo, Weilan Zhang

Plants, as key components of trophic networks, play a critical role in the bioaccumulation of PFAS and their transfer to higher trophic levels. This study introduces an innovative methodology using timsTOF fleX MALDI-2 to visualize the spatial distribution of PFAS in plant tissues. Radish was selected as the model plant due to its global popularity as a widely consumed vegetable. DAN (1,5-diaminonaphthalene) was used as the MALDI matrix, and the mass spectrometry operating conditions were optimized to acquire the best PFAS signals. The results show that long-chain PFAS predominantly accumulated in the xylem of the edible storage root, where their high hydrophobicity limits upward translocation. In contrast, short-chain PFAS and PFOA exhibited stronger signals in the cortex and periderm, likely due to alternative transport pathways. This differential distribution highlights the significant influence of PFAS physicochemical properties, such as chain length and hydrophobicity, on their in-planta transport mechanisms. By precisely mapping PFAS within plant tissues, this study provides a powerful tool for identifying high-risk edible tissues and assessing human exposure risks through PFAS-contaminated crops. It also reinforces the urgent need for sustainable remediation strategies to reduce PFAS levels in agricultural systems, thereby safeguarding food safety, ecosystem health, and human well-being.

{"title":"Visualization and spatial mapping of PFAS in the edible storage root of radish","authors":"Yuwei Zuo, Weilan Zhang","doi":"10.1016/j.hazl.2025.100141","DOIUrl":"10.1016/j.hazl.2025.100141","url":null,"abstract":"<div><div>Plants, as key components of trophic networks, play a critical role in the bioaccumulation of PFAS and their transfer to higher trophic levels. This study introduces an innovative methodology using timsTOF fleX MALDI-2 to visualize the spatial distribution of PFAS in plant tissues. Radish was selected as the model plant due to its global popularity as a widely consumed vegetable. DAN (1,5-diaminonaphthalene) was used as the MALDI matrix, and the mass spectrometry operating conditions were optimized to acquire the best PFAS signals. The results show that long-chain PFAS predominantly accumulated in the xylem of the edible storage root, where their high hydrophobicity limits upward translocation. In contrast, short-chain PFAS and PFOA exhibited stronger signals in the cortex and periderm, likely due to alternative transport pathways. This differential distribution highlights the significant influence of PFAS physicochemical properties, such as chain length and hydrophobicity, on their in-planta transport mechanisms. By precisely mapping PFAS within plant tissues, this study provides a powerful tool for identifying high-risk edible tissues and assessing human exposure risks through PFAS-contaminated crops. It also reinforces the urgent need for sustainable remediation strategies to reduce PFAS levels in agricultural systems, thereby safeguarding food safety, ecosystem health, and human well-being.</div></div>","PeriodicalId":93463,"journal":{"name":"Journal of hazardous materials letters","volume":"6 ","pages":"Article 100141"},"PeriodicalIF":6.6,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143169644","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}

引用次数: 0

Elevated concentrations of quaternary ammonium compounds in childcare centers: A pilot study

IF 6.6 Q1 ENGINEERING, ENVIRONMENTAL

Journal of hazardous materials letters

Pub Date : 2025-01-02 DOI: 10.1016/j.hazl.2024.100138

Yao Cheng , Zhong Lv , Erika Schreder , Min Hu , Abby Mutic , Guomao Zheng , Amina Salamova

Quaternary ammonium compounds (QACs) are used as antimicrobials, preservatives, and antistatic agents in cleaning, disinfecting and personal care products, and textiles. High levels of QACs have been found in indoor dust in residential homes; however, there is limited information on QAC exposure in non-residential environments serving sensitive populations, such as childcare centers. In this study, we investigated the occurrence of QACs, including benzylalkyldimethyl ammonium compounds (BACs), dialkyldimethylammonium compounds (DADMACs), and alkyltrimethylammonium compounds (ATMACs), in dust from childcare centers and estimated daily intake of QACs by toddlers in chidlcare via dust ingestion. Nineteen QACs were detected in dust with a median total QAC concentration (ΣQAC) of 150 μg/g. BACs were the most abundant QAC group found at concentrations ranging from 2.67 to 1370 μg/g (median 90.4 μg/g) and constituted 64 % of the ΣQAC concentrations. The QAC levels in dust from childcare centers were significantly higher than concentrations previosly reported in homes. The EDIs for BACs, DADMACs, and ATMACs via dust ingestion calculated based on the 95th percentile concentrations in childcare dust were up to 30 times higher than those for toddlers in residential homes. These findings demonstrate high QAC exposure in childcares, posing significant early-life exposure for toddlers.

{"title":"Elevated concentrations of quaternary ammonium compounds in childcare centers: A pilot study","authors":"Yao Cheng , Zhong Lv , Erika Schreder , Min Hu , Abby Mutic , Guomao Zheng , Amina Salamova","doi":"10.1016/j.hazl.2024.100138","DOIUrl":"10.1016/j.hazl.2024.100138","url":null,"abstract":"<div><div>Quaternary ammonium compounds (QACs) are used as antimicrobials, preservatives, and antistatic agents in cleaning, disinfecting and personal care products, and textiles. High levels of QACs have been found in indoor dust in residential homes; however, there is limited information on QAC exposure in non-residential environments serving sensitive populations, such as childcare centers. In this study, we investigated the occurrence of QACs, including benzylalkyldimethyl ammonium compounds (BACs), dialkyldimethylammonium compounds (DADMACs), and alkyltrimethylammonium compounds (ATMACs), in dust from childcare centers and estimated daily intake of QACs by toddlers in chidlcare via dust ingestion. Nineteen QACs were detected in dust with a median total QAC concentration (ΣQAC) of 150 μg/g. BACs were the most abundant QAC group found at concentrations ranging from 2.67 to 1370 μg/g (median 90.4 μg/g) and constituted 64 % of the ΣQAC concentrations. The QAC levels in dust from childcare centers were significantly higher than concentrations previosly reported in homes. The EDIs for BACs, DADMACs, and ATMACs via dust ingestion calculated based on the 95th percentile concentrations in childcare dust were up to 30 times higher than those for toddlers in residential homes. These findings demonstrate high QAC exposure in childcares, posing significant early-life exposure for toddlers.</div></div>","PeriodicalId":93463,"journal":{"name":"Journal of hazardous materials letters","volume":"6 ","pages":"Article 100138"},"PeriodicalIF":6.6,"publicationDate":"2025-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143169641","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}

引用次数: 0

No traces of emerging and priority organic pollutants in the muscles of Procambarus clarkii suggest the feasibility of its regulated and sustainable control from uncontaminated environments

IF 6.6 Q1 ENGINEERING, ENVIRONMENTAL

Journal of hazardous materials letters

Pub Date : 2024-12-30 DOI: 10.1016/j.hazl.2024.100140

Dario Savoca , Vincenzo Arizza , Gaetano Cammilleri , Leonardo Cerasino , Antonella Maccotta , Federico Marrone , Licia Pantano , Nico Salmaso , Francesco Paolo Faraone

A monitoring of organic contaminants in the muscles of the Procambarus clarkii and environmental samples of water and sediment was conducted in three Sicilian wetlands (Italy). The substances investigated in the biological samples were per- and polyfluoroalkyl substances (PFAS), phthalic acid esters (PAEs), pesticides, antibiotics, and microcystins (MCs), all of which were below the detection limit. Given that the Louisiana red swamp crayfish is considered a bioaccumulator, the results of this study indicate that these environments are not significantly contaminated by the selected pollutants. Furthermore, the study suggests the potential uses of the edible portions of this alien species. Despite P. clarkii cannot be marketed in several countries, including Italy, it is possible that the animal biomass obtained in the frame of the monitoring, control and eradication activities carried out by local authorities, could be exploited for various purposes, such as food, feed and biotechnology. This would reduce the costs associated with disposal and make these activities more sustainable in the long term, thereby contributing to the preservation of ecosystems that are currently threatened by this invasive species.

{"title":"No traces of emerging and priority organic pollutants in the muscles of Procambarus clarkii suggest the feasibility of its regulated and sustainable control from uncontaminated environments","authors":"Dario Savoca , Vincenzo Arizza , Gaetano Cammilleri , Leonardo Cerasino , Antonella Maccotta , Federico Marrone , Licia Pantano , Nico Salmaso , Francesco Paolo Faraone","doi":"10.1016/j.hazl.2024.100140","DOIUrl":"10.1016/j.hazl.2024.100140","url":null,"abstract":"<div><div>A monitoring of organic contaminants in the muscles of the <em>Procambarus clarkii</em> and environmental samples of water and sediment was conducted in three Sicilian wetlands (Italy). The substances investigated in the biological samples were per- and polyfluoroalkyl substances (PFAS), phthalic acid esters (PAEs), pesticides, antibiotics, and microcystins (MCs), all of which were below the detection limit. Given that the Louisiana red swamp crayfish is considered a bioaccumulator, the results of this study indicate that these environments are not significantly contaminated by the selected pollutants. Furthermore, the study suggests the potential uses of the edible portions of this alien species. Despite <em>P. clarkii</em> cannot be marketed in several countries, including Italy, it is possible that the animal biomass obtained in the frame of the monitoring, control and eradication activities carried out by local authorities, could be exploited for various purposes, such as food, feed and biotechnology. This would reduce the costs associated with disposal and make these activities more sustainable in the long term, thereby contributing to the preservation of ecosystems that are currently threatened by this invasive species.</div></div>","PeriodicalId":93463,"journal":{"name":"Journal of hazardous materials letters","volume":"6 ","pages":"Article 100140"},"PeriodicalIF":6.6,"publicationDate":"2024-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143169642","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}

引用次数: 0

New Approach Methodologies: Physiological responses of daphnids to pharmaceutical mixtures

IF 6.6 Q1 ENGINEERING, ENVIRONMENTAL

Journal of hazardous materials letters

Pub Date : 2024-12-28 DOI: 10.1016/j.hazl.2024.100139

Emma Rowan , Anne Leung , Katie O’Rourke , Xiaofei Yin , Lorraine Brennan , Konstantinos Grintzalis

Conventional methods for water monitoring are insufficient to capture the impacts of pollution because of their sensitivity limits, while they also fail to provide mechanistic insight regarding the actions of pollutants. On the other hand, New Approach Methodologies are more and more introduced as supplementary tools that provide sensitive metrics for pollution assessment. In this context, freshwater sentinel species commonly known as water fleas were used to assess the impact of a pharmaceutical mixture. The pharmaceutical cocktail comprised of representatives of commonly encountered pharmaceuticals and specifically diclofenac, metformin, gabapentin, amoxicillin, trimethoprim, and erythromycin. Combining toxicity, phenotypic and molecular endpoints, results showed differences in mortality, feeding, key enzyme activities and metabolic perturbations, thus supporting a distinct pattern in physiological responses of daphnids that could be used to monitor and predict pollution early.

引用次数: 0

Per- and polyfluoroalkyl substances in rainfall runoff from an AFFF-impacted concrete pad: A field simulation study

IF 6.6 Q1 ENGINEERING, ENVIRONMENTAL

Journal of hazardous materials letters

Pub Date : 2024-11-28 DOI: 10.1016/j.hazl.2024.100137

Phong K. Thai , Jeffrey T. McDonough , Trent A. Key , Anita Thapalia , Scott Porman , Pritesh Prasad , Stephanie Fiorenza , Hirozumi Watanabe , Craig M. Barnes , Jochen F. Mueller

Per- and polyfluoroalkyl substances (PFAS) retained within hardscape have been observed to leach over time in numerous laboratory studies. The aim of this study was to measure the release of key PFAS in rainfall runoff from a concrete pad impacted by historical AFFF use at the field-scale. Rainfall simulations were conducted on a 5 m² (1 ×5 m) plot for 3 consecutive days. Runoff water was collected every 2 minutes and analyzed for 5 PFAS commonly associated with AFFF. Surface samples of the concrete were collected from the plot after the rainfall runoff experiment. Perfluorooctane sulfonate (PFOS) exhibited the highest concentrations within the concrete (up to ∼4000 μg kg⁻¹) and runoff water (up to 500 μg L⁻¹), followed by 6:2 fluorotelomer sulfonate (6:2 FTS). PFAS concentrations in runoff water were higher in the first sample and then decreased in the consecutive samples of each rainfall simulation. It is estimated that the percentage of the total PFAS mass within the surface of the concrete contributing to runoff samples ranged from 0.006 % (PFOS) to 0.031 % (PFHxA) per rainfall event. This suggests low but sustained PFAS leaching from AFFF-impacted concrete into runoff water. Our findings confirmed that concrete impacted by legacy use of AFFF is a likely secondary source of PFAS in runoff water and highlight some similarities and differences between laboratory- and field-scale rainfall simulations.

{"title":"Per- and polyfluoroalkyl substances in rainfall runoff from an AFFF-impacted concrete pad: A field simulation study","authors":"Phong K. Thai , Jeffrey T. McDonough , Trent A. Key , Anita Thapalia , Scott Porman , Pritesh Prasad , Stephanie Fiorenza , Hirozumi Watanabe , Craig M. Barnes , Jochen F. Mueller","doi":"10.1016/j.hazl.2024.100137","DOIUrl":"10.1016/j.hazl.2024.100137","url":null,"abstract":"<div><div>Per- and polyfluoroalkyl substances (PFAS) retained within hardscape have been observed to leach over time in numerous laboratory studies. The aim of this study was to measure the release of key PFAS in rainfall runoff from a concrete pad impacted by historical AFFF use at the field-scale. Rainfall simulations were conducted on a 5 m<sup>2</sup> (1 ×5 m) plot for 3 consecutive days. Runoff water was collected every 2 minutes and analyzed for 5 PFAS commonly associated with AFFF. Surface samples of the concrete were collected from the plot after the rainfall runoff experiment. Perfluorooctane sulfonate (PFOS) exhibited the highest concentrations within the concrete (up to ∼4000 μg kg<sup>−1</sup>) and runoff water (up to 500 μg L<sup>−1</sup>), followed by 6:2 fluorotelomer sulfonate (6:2 FTS). PFAS concentrations in runoff water were higher in the first sample and then decreased in the consecutive samples of each rainfall simulation. It is estimated that the percentage of the total PFAS mass within the surface of the concrete contributing to runoff samples ranged from 0.006 % (PFOS) to 0.031 % (PFHxA) per rainfall event. This suggests low but sustained PFAS leaching from AFFF-impacted concrete into runoff water. Our findings confirmed that concrete impacted by legacy use of AFFF is a likely secondary source of PFAS in runoff water and highlight some similarities and differences between laboratory- and field-scale rainfall simulations.</div></div>","PeriodicalId":93463,"journal":{"name":"Journal of hazardous materials letters","volume":"6 ","pages":"Article 100137"},"PeriodicalIF":6.6,"publicationDate":"2024-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143169645","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}

引用次数: 0

Effect of triclosan on phosphate solubilising bacteria in mangrove ecosystem: In-vitro and In-vivo 三氯生对红树林生态系统中磷酸盐增溶菌的体外和体内影响

IF 6.6 Q1 ENGINEERING, ENVIRONMENTAL

Journal of hazardous materials letters

Pub Date : 2024-11-19 DOI: 10.1016/j.hazl.2024.100136

R.K. Dash , K. Kumar , S.P. Shukla , S. Kumar , S. Kumar H , S. Karmakar , T. Paul

Triclosan (TCS) is a widely used biocide found in medicinal, household, and personal care products, frequently detected in various environmental matrices, posing significant threats to microbial communities and overall ecosystem functioning. This study evaluates the in vivo and in vitro effects of triclosan (TCS) on phosphate-solubilising bacteria (PSB) in mangrove ecosystems. Two experimental approaches were employed: a microcosm (in vivo) study and a laboratory (in vitro) analysis. Five isolated PSB strains—Sphingomonas paucimobilis, Rhizobium radiobacter, Serratia ficaria, Klebsiella oxytoca, and Klebsiella pneumoniae—were selected from the mangrove ecosystem for investigation. The minimum inhibitory concentration (MIC) results revealed that Klebsiella pneumoniae exhibited the highest resistance to TCS among the tested strains. In vivo experiments demonstrated a significant reduction in soil-available phosphorus and enzymatic activities, including acid and alkaline phosphatase, dehydrogenase, and fluorescein diacetate (FDA) activity, in TCS-exposed samples throughout the exposure period. In vitro results showed that phosphate solubilisation decreased significantly with increasing TCS concentrations in all strains except Klebsiella pneumoniae. Overall, TCS effectively inhibited the growth of PSB in mangrove ecosystems. This study is the first to report the impact of TCS on PSB in mangroves and provides valuable data for future research on microbial communities in such environments.

三氯生（TCS）是一种广泛应用于医药、家庭和个人护理产品中的杀菌剂，经常在各种环境矩阵中检测到，对微生物群落和整体生态系统功能构成重大威胁。本研究评估了三氯生（TCS）对红树林生态系统中磷酸盐溶解菌（PSB）的体内和体外影响。采用两种实验方法：微观（体内）研究和实验室（体外）分析。从红树林生态系统中分离出少动鞘氨单胞菌、放射根瘤菌、沙雷氏菌、氧化克雷伯菌和肺炎克雷伯菌5株PSB进行研究。最低抑菌浓度（MIC）结果显示肺炎克雷伯菌对TCS的耐药性最高。体内实验表明，在整个暴露期间，暴露于tcs的样品中土壤有效磷和酶活性（包括酸性和碱性磷酸酶、脱氢酶和双乙酸荧光素（FDA）活性）显著降低。体外实验结果显示，除肺炎克雷伯菌外，所有菌株的磷酸盐增溶作用均随TCS浓度的增加而显著降低。总体而言，TCS有效抑制了红树林生态系统中PSB的生长。本研究首次报道了TCS对红树林PSB的影响，为今后研究此类环境下的微生物群落提供了有价值的数据。

{"title":"Effect of triclosan on phosphate solubilising bacteria in mangrove ecosystem: In-vitro and In-vivo","authors":"R.K. Dash , K. Kumar , S.P. Shukla , S. Kumar , S. Kumar H , S. Karmakar , T. Paul","doi":"10.1016/j.hazl.2024.100136","DOIUrl":"10.1016/j.hazl.2024.100136","url":null,"abstract":"<div><div>Triclosan (TCS) is a widely used biocide found in medicinal, household, and personal care products, frequently detected in various environmental matrices, posing significant threats to microbial communities and overall ecosystem functioning. This study evaluates the <em>in vivo</em> and <em>in vitro</em> effects of triclosan (TCS) on phosphate-solubilising bacteria (PSB) in mangrove ecosystems. Two experimental approaches were employed: a microcosm (<em>in vivo</em>) study and a laboratory (in vitro) analysis. Five isolated PSB strains—<em>Sphingomonas paucimobilis</em>, <em>Rhizobium radiobacter</em>, <em>Serratia ficaria</em>, <em>Klebsiella oxytoca</em>, and <em>Klebsiella pneumoniae</em>—were selected from the mangrove ecosystem for investigation. The minimum inhibitory concentration (MIC) results revealed that <em>Klebsiella pneumoniae</em> exhibited the highest resistance to TCS among the tested strains. <em>In vivo</em> experiments demonstrated a significant reduction in soil-available phosphorus and enzymatic activities, including acid and alkaline phosphatase, dehydrogenase, and fluorescein diacetate (FDA) activity, in TCS-exposed samples throughout the exposure period. <em>In vitro</em> results showed that phosphate solubilisation decreased significantly with increasing TCS concentrations in all strains except <em>Klebsiella pneumoniae</em>. Overall, TCS effectively inhibited the growth of PSB in mangrove ecosystems. This study is the first to report the impact of TCS on PSB in mangroves and provides valuable data for future research on microbial communities in such environments.</div></div>","PeriodicalId":93463,"journal":{"name":"Journal of hazardous materials letters","volume":"6 ","pages":"Article 100136"},"PeriodicalIF":6.6,"publicationDate":"2024-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142748804","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}

引用次数: 0

Hitchhikers on traveling microplastics: Three necessary steps for bacteria becoming dangerous invaders 微塑料旅行中的 "搭便车者"：细菌成为危险入侵者的三个必要步骤

IF 6.6 Q1 ENGINEERING, ENVIRONMENTAL

Journal of hazardous materials letters

Pub Date : 2024-11-01 DOI: 10.1016/j.hazl.2024.100133

Xiaohan Zhang , Ying Zhang , Yongzheng Ma , Zhiguang Niu

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.

微塑料（MPs）近年来备受关注，其携带的细菌是否会对生态造成危害也是一个热门话题。旅行微塑料上的定殖细菌（即 "搭便车者"）在新环境中成为入侵物种，需要完成三个步骤：到达、下落和生长。然而，以往的研究大多只关注第一步，我们认为这不足以讨论物种入侵问题。因此，在这篇前沿综述中，我们回顾了目前关于MPs上细菌群落独特性的研究进展，并总结了质球的独特性并不像之前认为的那么高。此外，我们还解释了为什么完成细菌物种入侵需要三个步骤。此外，我们还分析了阻碍讨论 MPs 作为入侵物种载体的技术难点，以及未来研究的前景。因此，这篇前沿综述提出了关于 MPs 作为细菌载体的新见解，并为未来研究提出了研究方向。

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引用次数: 0

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 用 µ-X 射线荧光 (XRF) 和氟 K 边 µ-X 射线吸收近边结构 (XANES) 光谱检测受影响混凝土中 PFAS 的分布情况

IF 6.6 Q1 ENGINEERING, ENVIRONMENTAL

Journal of hazardous materials letters

Pub Date : 2024-11-01 DOI: 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.

更好地了解全氟烷基和多氟烷基物质（PFAS）在受全氟烷基和多氟烷基物质（PFAS）影响的混凝土中的分布情况对于全氟烷基和多氟烷基物质（PFAS）的风险管理和净化非常重要。这项研究结合了 µ-X 射线荧光 (µ-XRF) 和氟 K 边 µ-X 射线吸收近边结构 (µ-XANES) 光谱法，以非破坏性的方式深入了解受影响混凝土中 PFAS 的分布情况。μ-XRF 和 μ-XANES 光谱为检测 PFAS 提供了更多细节，而之前进行的解吸电喷雾电离 (DESI) 成像方法没有检测到这些 PFAS。短链全氟辛烷磺酸出现在混凝土芯的顶部（0.5 厘米），长链全氟辛烷磺酸主要出现在混凝土芯的底部（5 厘米）。此外，还检测到了无机氟部分，这可能会妨碍对混凝土中有机氟（如 PFAS）的检测。因此，这种非破坏性技术是检测受污染混凝土中 PFAS 的一种补充方法。

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引用次数: 0

Per- and polyfluoroalkyl substances in feathers of waterbirds (Ardeidae) from Poyang Lake, China: Bioaccumulation, distribution, and environmental relevance 中国鄱阳湖水鸟羽毛中的全氟和多氟烷基物质：生物累积、分布和环境相关性

IF 6.6 Q1 ENGINEERING, ENVIRONMENTAL

Journal of hazardous materials letters

Pub Date : 2024-11-01 DOI: 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 C_9–14 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.

有关全氟烷基和多氟烷基物质（PFAS）在水鸟羽毛中的分布特征和环境相关性的研究很少。本研究调查了鄱阳湖三种常见鸟类（小白鹭、灰鹭和池鹭）羽毛中 23 种 PFAS 的浓度。羽片和肩胛骨中的全氟辛烷磺酸总浓度分别为 38 - 42 纳克/克干重（干重）和 21 - 38 纳克/克干重；所有羽毛中都富含长链 C9-14 全氟羧酸。大多数全氟辛烷磺酸在羽片中积累；但全氟己烷磺酸和全氟辛烷磺酰胺在肩胛中占主导地位。尾羽和飞行羽毛中的全氟辛烷磺酸浓度高于覆盖羽毛和体羽。此外，水鸟羽毛中的全氟辛烷磺酸浓度与鱼类相当，高于底栖无脊椎动物，这些水鸟均来自鄱阳湖。羽毛中的 PFAS 含量与鱼类（r > 0.71）和底栖动物（r > 0.43）中的 PFAS 含量呈显著正相关。这些结果表明，水鸟羽毛是区域淡水生态系统中 PFAS 污染的合适生物监测器。

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引用次数: 0