Chemosphere最新文献_第3页

Characteristics, prediction, and risk assessment of phthalates, organophosphate esters, and polycyclic aromatic hydrocarbons in vegetables from plastic greenhouses of Northeast China. 中国东北塑料大棚蔬菜中邻苯二甲酸盐、有机磷酸酯和多环芳烃的特征、预测和风险评估。

Chemosphere Pub Date : 2024-11-13 DOI: 10.1016/j.chemosphere.2024.143743

Xinhao Xu, Yan Wang, Yue Xu, Feng Tan

{"title":"Characteristics, prediction, and risk assessment of phthalates, organophosphate esters, and polycyclic aromatic hydrocarbons in vegetables from plastic greenhouses of Northeast China.","authors":"Xinhao Xu, Yan Wang, Yue Xu, Feng Tan","doi":"10.1016/j.chemosphere.2024.143743","DOIUrl":"https://doi.org/10.1016/j.chemosphere.2024.143743","url":null,"abstract":"We investigated the contaminations of phthalates (PAEs), organophosphate esters (OPEs), and polycyclic aromatic hydrocarbons (PAHs) in the vegetables and their corresponding soils from 26 plastic greenhouses of Northeast China. PAEs, OPEs, and PAHs in the edible portion of vegetables were in the range of 2620-21800, 115-852, and 32.4-602 ng/g, while the levels of these chemicals in the greenhouse soils were 5770-18800, 196-935, and 109-1600 ng/g, respectively. PAEs are the main organic pollutants in greenhouses, which were 1-2 orders of magnitude higher than that of OPEs and PAHs. Leafy vegetables showed the highest contamination level, which is ∼1-3 times that of root and fruit vegetables. Bioaccumulation factors (BAFs) of chemicals are significantly negatively correlated with their physicochemical properties, e.g., octanol-water partition coefficient and organic carbon partition coefficient. The partition-limited model can accurately predict the contamination level of greenhouse vegetables to a certain extent based on the chemical's concentration in the corresponding soil. We assessed the hazard quotients of target compounds through daily intake of greenhouse vegetables, and found a low risk for di(2-ethylhexyl) phthalate. This research emphasized the potential dietary exposure risks caused by greenhouse leafy vegetables, and proposed a method for evaluating the risk of greenhouse vegetables through soil monitoring.","PeriodicalId":93933,"journal":{"name":"Chemosphere","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142640479","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Temporal Concentrations of Quaternary Ammonium Compounds in Wastewater Treatment Effluents During the COVID-19 Pandemic, 2020-2021. 2020-2021 年 COVID-19 大流行期间废水处理废水中季铵化合物的时间浓度。

Chemosphere Pub Date : 2024-11-13 DOI: 10.1016/j.chemosphere.2024.143753

Michelle L Hladik, Michael S Gross, Gabrielle P Black, Dana W Kolpin, Jason R Masoner, Patrick J Phillips, Paul M Bradley, Kelly L Smalling

{"title":"Temporal Concentrations of Quaternary Ammonium Compounds in Wastewater Treatment Effluents During the COVID-19 Pandemic, 2020-2021.","authors":"Michelle L Hladik, Michael S Gross, Gabrielle P Black, Dana W Kolpin, Jason R Masoner, Patrick J Phillips, Paul M Bradley, Kelly L Smalling","doi":"10.1016/j.chemosphere.2024.143753","DOIUrl":"https://doi.org/10.1016/j.chemosphere.2024.143753","url":null,"abstract":"Quaternary ammonium compounds (QAC) are high production chemicals used in many commercial and household disinfection products. During the SARS-CoV-2 (COVID-19) pandemic, QACs were included on lists of COVID-19 disinfectants. Increased QAC use could lead to higher levels of QACs in wastewater treatment plant (WWTP) effluents, which could subsequently be released into the environment. To evaluate QACs in WWTP effluent, three WWTPs in the northeastern United States were monitored from May 2020 through August 2021. Target QACs included six benzylalkyldimethyl ammonium compounds (BAC), three dialkyldimethyl ammonium compounds (DADMAC), two ethylbenzylalkyldimethyl ammonium compounds (EBAC), and benzethonium. At least one QAC was detected in every sample with individual concentrations up to 1,600 ng L-1. BAC-C14 was detected most frequently, found in 93% of effluent samples; BAC-C12, BAC-C16, EBAC-C12 and EBAC-C14 were all detected in greater than 80% of samples. Few temporal patterns were observed in QAC concentrations with respect to weekly COVID-19 cases: at WWTP 2, DADMAC-C8:C10 and DADMAC-C10 were positively correlated, and DADMAC-C8 negatively correlated. There were several seasonal trends at WWTP 1, including significant differences of ƩDADMAC, which were higher in fall than summer; ƩBAC was higher during the fall than both spring and summer; and ƩQAC where higher during the fall than spring.","PeriodicalId":93933,"journal":{"name":"Chemosphere","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142640487","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Arsenite removal by using ZnAlFe mixed metal oxides derived from layered double hydroxides. 利用源自层状双氢氧化物的 ZnAlFe 混合金属氧化物去除亚砷酸盐。

Chemosphere Pub Date : 2024-11-12 DOI: 10.1016/j.chemosphere.2024.143694

Luis A May Ix, Sandra Cipagauta Díaz, Francisco Tzompantzi, Raúl Pérez Hernández, Jorge M Meichtry, Emilia B Halac, Marta I Litter

{"title":"Arsenite removal by using ZnAlFe mixed metal oxides derived from layered double hydroxides.","authors":"Luis A May Ix, Sandra Cipagauta Díaz, Francisco Tzompantzi, Raúl Pérez Hernández, Jorge M Meichtry, Emilia B Halac, Marta I Litter","doi":"10.1016/j.chemosphere.2024.143694","DOIUrl":"10.1016/j.chemosphere.2024.143694","url":null,"abstract":"ZnAlFe mixed metal oxides (ZnAlFe-MMOs) were synthesized from layered double hydroxides (LDHs) prepared by the coprecipitation method at pH 9 using an initial weight composition of Zn2+ = 75%, Al3+ = 15% and Fe3+ = 10%, with or without the addition of citric or oxalic acid. The solids were calcined at 400 °C to obtain the respective MMOs, which exhibited relatively high specific surface areas (165.3 - 63.8 m2 g-1) and semiconductor properties active in the visible region (bandgap values (Eg) of 2.42 - 1.77 eV). The synthesized materials were tested for the removal of trivalent arsenic by adsorption and by photocatalysis under visible light irradiation (λ ≥ 420 nm). The best removal of As(III) by adsorption (65.9%) and by photocatalysis (99.9%) was obtained with the ZnAlFe-MMOs prepared in the absence of organic acids. The XPS results indicate the coexistence of As3+ and As5+ over ZnAlFe-MMOs after the photocatalytic reaction and also confirm the formation of Fe2+ sites on the hematite surface that enhances the removal of As(III). Raman measurements confirmed that, in the photocatalytic experiments, As is largely retained as As(V) on ZnAlFe-MMOs, bound to Fe. The results of fluorescence of 7-hydroxycoumarin suggest that the photocatalyst produces HO•, which can be the main species for As(III) oxidation under UV-Vis irradiation. Moreover, ZnAlFe-MMOs exhibited a good reusability after regeneration making ZnAlFe-MMOs a promising material for arsenic decontamination in polluted water.","PeriodicalId":93933,"journal":{"name":"Chemosphere","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142633278","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Cr(VI) bioreduction enhanced by the electron transfer between flavin reductase and persistent free radicals. 黄素还原酶与持久性自由基之间的电子传递增强了 Cr(VI) 的生物还原。

Chemosphere Pub Date : 2024-11-12 DOI: 10.1016/j.chemosphere.2024.143746

Cheng Yu, Yassine Riahi, Qian Wang, Mengyang Feng, Abdelkader Mohamed, Ke Dai, Peng Cai, Qiaoyun Huang

{"title":"Cr(VI) bioreduction enhanced by the electron transfer between flavin reductase and persistent free radicals.","authors":"Cheng Yu, Yassine Riahi, Qian Wang, Mengyang Feng, Abdelkader Mohamed, Ke Dai, Peng Cai, Qiaoyun Huang","doi":"10.1016/j.chemosphere.2024.143746","DOIUrl":"10.1016/j.chemosphere.2024.143746","url":null,"abstract":"Persistent free radicals (PFRs) in biochar are an important electron shuttle for mediating electron transfer, which has significant impact on the biogeochemical redox reactions. Although the influence of biochar on the extracellular electron transfer (EET) for redox cycle has been extensively studied, the molecular mechanism for promoting the EET with PFRs remains poorly understood. This study investigated the oxygen-centered PFRs-mediated Cr(VI) reduction by Shewanella oneidensis MR-1 (MR-1) and exhibited the molecular mechanism of electron transfer between flavin substances and PFRs. Results showed that the Cr(VI) bioreduction rate by MR-1 increased from 31% to 70% with the addition of biochar. Electrochemical results illustrated that biochar increased biocurrent generation in the Cr(VI) bioreduction process. 3D-EEM and LC/MS spectra indicated that MR-1 secreted the flavin mononucleotide (FMN) reductase that relied on the [H] to provide the electrons. Electron paramagnetic resonance spectra illustrated that PFRs in biochar accepted the electrons from FMN reductase and stored those bioelectrons. Because of the oxidation of FMN, the electron transfer from FMN reductase to PFRs would increase the intracellular reactive oxygen species, which further produced the extracellular ·O2-. The reduced PFRs released the bioelectrons, accelerating the Cr(VI) reduction by ·O2-. Together with the results of the mutant strains experiment, it was found that the EET by c-cytochrome and free radicals contributed to the Cr(VI) bioreduction by 7.1% and 92.9%, respectively. These findings revealed that the PFRs could participate in the EET process and promote the redox reactions, providing a new approach for enhancing the remediation of heavy metal pollution by microorganisms and suggesting the important role of PFRs in the electron transfer process.","PeriodicalId":93933,"journal":{"name":"Chemosphere","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142634026","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Assessing the Aquatic Biodegradation Potential of Polymeric Excipients for Pharmaceutical Formulation. 评估用于药物制剂的聚合物辅料的水生生物降解潜力。

Chemosphere Pub Date : 2024-11-12 DOI: 10.1016/j.chemosphere.2024.143739

Mila Bading, Oliver Olsson, Klaus Kümmerer

{"title":"Assessing the Aquatic Biodegradation Potential of Polymeric Excipients for Pharmaceutical Formulation.","authors":"Mila Bading, Oliver Olsson, Klaus Kümmerer","doi":"10.1016/j.chemosphere.2024.143739","DOIUrl":"https://doi.org/10.1016/j.chemosphere.2024.143739","url":null,"abstract":"Polymeric excipients (PEx) are essential in drug formulation but raise environmental concerns upon wastewater release post-administration due their potential detrimental effects to life-histories of freshwater vertebrates and invertebrates Ten pharmaceutical polymeric compounds were assessed in a stepwise environmental biodegradation assessment according to standard OECD 301 guidelines to thoroughly evaluate biodegradability of these compounds. Polyvinyl alcohol (PVA), polyethylene glycol (PEG), chitosan, maize starch, and sodium starch glycolate (SSG) were found to be 'readily biodegradable,' although PVA and PEG showed variation across employed test systems. PEG and PVA did not degrade in OECD 301D tests having low microbial density and diversity. In contrast, in the OECD 301F tests i.e., higher microbial density and diversity, PEG exhibited 73.0 ± 3.3% biodegradation, while PVA showed 91.2 ± 8.0% biodegradation with secondary effluent and activated sludge, respectively. Polyvinyl pyrrolidone (PVP), Copovidone, Kollidon CL, and Eudragit derivatives EPO and L100-55 were categorized as 'non-biodegradable' (< 10 % biodegradation). No increase in degradation was observed after 42 days. This indicates their environmental persistence. This study lays the groundwork for a comprehensive understanding of the biodegradation potential of pharmaceutical polymers. It considers the influence of test conditions, inoculum sources, and compound characteristics. The environmental persistence of certain PExs underlines the urgent need to use more environmentally biodegradable alternatives in drug formulation.","PeriodicalId":93933,"journal":{"name":"Chemosphere","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142633427","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A critical review of microplastic pollution in breeding industry：sources, distribution, impacts, and characterization techniques, mitigation strategies and future research directions. 对养殖业微塑料污染：来源、分布、影响、特征描述技术、缓解策略和未来研究方向的评论。

Chemosphere Pub Date : 2024-11-12 DOI: 10.1016/j.chemosphere.2024.143713

Wei-Kang Deng, Jing-Li Zeng, Yi-Heng Deng, Xin-Di Liao, Si-Cheng Xing

引用次数: 0

Application of Central Composite Design for Commercial Laundry Wastewater Treatment by Packed bed Electrocoagulation using sacrificial iron electrodes. 使用牺牲铁电极的填料床电凝法在商业洗衣废水处理中应用中心复合设计。

Chemosphere Pub Date : 2024-11-12 DOI: 10.1016/j.chemosphere.2024.143729

Sushil Kumar, Patrick Drogui, R D Tyagi

{"title":"Application of Central Composite Design for Commercial Laundry Wastewater Treatment by Packed bed Electrocoagulation using sacrificial iron electrodes.","authors":"Sushil Kumar, Patrick Drogui, R D Tyagi","doi":"10.1016/j.chemosphere.2024.143729","DOIUrl":"https://doi.org/10.1016/j.chemosphere.2024.143729","url":null,"abstract":"This research paper deals with a novel method utilizing packed bed electrocoagulation (PBEC) comprising of sacrificial iron electrodes and coupled with extracellular polymeric substances (EPS) used as flocculent agents for the treatment of commercial laundry wastewater (LWW). The study employs stainless steel cathodes, graphite anodes, and scrap iron pieces as sacrificial electrodes, ensuring efficient treatment in dynamic batch mode operation with enhanced contact time facilitated by serpentine flow. The initial characteristics of LWW were COD 579 ± 30 mg/L, TSS of 60 ± 10 mg/L, TS of 622 ± 20 mg/L, turbidity of 110 ± 5 NTU, pH of 9 ± 0.5, NPEOs of 570 ±150 μg/L and conductivity of 494 ± 20 mS/cm. The results demonstrate effective removal of turbidity (98 ± 2%), TS (95 ± 3%), COD (89 ± 5%), and NPEOs (53 ± 2%) under optimized current intensity: 2.99A, treatment time: 58.8 minutes and enhanced EPS dose from 5.8 mg/L to 8.0 mg/L. The economic feasibility analysis reveals energy consumption as the primary expenditure, with a treatment cost of 1.20$CAN/m3. This research introduces sustainable treatment for commercial LWW, meeting Quebec's reuse standards, implying reuse potential and responsible wastewater management.","PeriodicalId":93933,"journal":{"name":"Chemosphere","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142632994","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Clinical, histological, molecular, and toxicokinetic renal outcomes of per-/polyfluoroalkyl substances (PFAS) exposure: Systematic review and meta-analysis. 接触全氟烷基物质（PFAS）对肾脏的临床、组织学、分子和毒物动力学影响：系统回顾和荟萃分析。

Chemosphere Pub Date : 2024-11-12 DOI: 10.1016/j.chemosphere.2024.143745

Jidapa Hanvoravongchai, Methasit Laochindawat, Yusuke Kimura, Nathan Mise, Sahoko Ichihara

{"title":"Clinical, histological, molecular, and toxicokinetic renal outcomes of per-/polyfluoroalkyl substances (PFAS) exposure: Systematic review and meta-analysis.","authors":"Jidapa Hanvoravongchai, Methasit Laochindawat, Yusuke Kimura, Nathan Mise, Sahoko Ichihara","doi":"10.1016/j.chemosphere.2024.143745","DOIUrl":"10.1016/j.chemosphere.2024.143745","url":null,"abstract":"Background: Per- and polyfluoroalkyl substances (PFAS) are synthetic chemicals present in the environment that can negatively affect health. Kidney is the major target organ of PFAS exposure, yet the renal impact of PFAS is not completely understood. Here we review the effects of PFAS exposure on kidney health to identify gaps in our understanding and mark potential avenues for future research.Methods: PubMed and SCOPUS databases were searched for studies that examined the association between PFAS exposure and kidney-related outcomes. We included all epidemiological, animal, and cell studies and categorized outcomes into four categories: clinical, histological, molecular and toxicokinetic.Results: We identified 169 studies, including 51 on clinical outcomes, 28 on histological changes, 42 on molecular mechanisms, and 68 on toxicokinetics. Perfluorooctanoic acid (PFOA) and perfluorooctane sulfonic acid (PFOS) exposure were associated with kidney dysfunction, chronic kidney diseases, and increased risk of kidney cancer. Various histological changes were reported, especially in tubular epithelial cells, and the etiology of PFAS-induced kidney injury included various molecular mechanisms. Although PFOA and PFOS are not considered genotoxic, they exhibit several characteristics of carcinogens. Toxicokinetics of PFOA and PFOS differed significantly between species, with renal elimination influenced by various factors such as sex, age, and structure of the compound.Conclusion: Evidence suggests that PFAS, especially PFOA and PFOS, negatively affects kidney health, though gaps in our understanding of such effects call for further research.","PeriodicalId":93933,"journal":{"name":"Chemosphere","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142634110","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Co-grown novel S-scheme tubular P-UCN/S-TCN homojunction mediates photocatalysis-PMS activation synergistic system for efficient degradation of antibiotic. 共同生长的新型 S 型管状 P-UCN/S-TCN 同质结介导光催化-PMS 激活协同系统，实现抗生素的高效降解。

Chemosphere Pub Date : 2024-11-11 DOI: 10.1016/j.chemosphere.2024.143731

Ting Wu, Zhifeng Liu, Binbin Shao, Yuan Pan, Qingyun He, Xiansheng Zhang, Lingfeng Zhou, Yunze Wang, Teng Li, Sheng Liu

{"title":"Co-grown novel S-scheme tubular P-UCN/S-TCN homojunction mediates photocatalysis-PMS activation synergistic system for efficient degradation of antibiotic.","authors":"Ting Wu, Zhifeng Liu, Binbin Shao, Yuan Pan, Qingyun He, Xiansheng Zhang, Lingfeng Zhou, Yunze Wang, Teng Li, Sheng Liu","doi":"10.1016/j.chemosphere.2024.143731","DOIUrl":"https://doi.org/10.1016/j.chemosphere.2024.143731","url":null,"abstract":"The low photogenerated carrier separation and transport ability of the photocatalyst are the main factors inhibiting the photocatalytic activity. The construction of composite photocatalysts can effectively improve the efficiency of photogenerated carriers. However, the problem of reduced photocatalyst stability and catalytic activity due to easy separation of unstable composite interfaces has not been well solved for a long time. Therefore, in this work, a co-growth strategy was put forward to thermally co-polymerize sulfur-containing tubular supramolecular precursors with urea in order to achieve the growth of porous g-C3N4 nanoparticles (P-UCN) on the sulfur-doped tubular g-C3N4 (S-TCN), thus to successfully prepare P-UCN/S-TCN homojunction photocatalysts with chemically bonded stable composite interfaces. Furthermore, a coupled photocatalytic-peroxymonosulfate (PMS) activation system was constructed to further promote the photogenerated carrier separation of P-UCN/S-TCN as well as the catalytic activity of the reaction system through the electron donor-acceptor relationship between P-UCN/S-TCN and PMS. Experimental characterization and DFT theoretical calculations together revealed the band gap structural characteristics and the direction of electron flow of the P-UCN/S-TCN S-scheme homojunction, and confirmed the successful construction of a stable chemically bonded homojunction interface. Then the results of catalytic activity test of P-UCN1/S-TCN1 showed a high tetracycline hydrochloride (TCH) degradation efficiency (93.5%) within 30 min, and also demonstrated 100% degradation efficiency for Rhodamine B (RhB). This work made important progress in the design of a novel stable S-scheme homojunction interface and provided a reference for the application of photocatalysis-PMS coupling system in environmental remediation.","PeriodicalId":93933,"journal":{"name":"Chemosphere","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142634121","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Use of ²H-labeled nanoplastics to study their accumulation and toxicity in Daphnia magna. 使用 2H 标记的纳米塑料研究其在大型蚤体内的积累和毒性。

Chemosphere Pub Date : 2024-11-11 DOI: 10.1016/j.chemosphere.2024.143658

Roxane Danquigny, Bruno Grassl, Séverine Le Faucheur, Javier Jiménez-Lamana, Marc Metian, Stéphanie Reynaud

{"title":"Use of 2H-labeled nanoplastics to study their accumulation and toxicity in Daphnia magna.","authors":"Roxane Danquigny, Bruno Grassl, Séverine Le Faucheur, Javier Jiménez-Lamana, Marc Metian, Stéphanie Reynaud","doi":"10.1016/j.chemosphere.2024.143658","DOIUrl":"https://doi.org/10.1016/j.chemosphere.2024.143658","url":null,"abstract":"Understanding the interactions between nanoplastics (NP) and biota is essential for risk assessment. However, NP quantification in complex matrices remains a challenge, especially when they are not labeled. Most labeling strategies consists in adding another compound (fluorophore, metal, lanthanide…) to the polymer, which can alter the NP properties and poses a risk of leaching phenomena. In the present study, we synthesized spherical and monodisperse 2H-labeling NP (129 nm) with carboxyl groups at their surface (8.7 nm-2) using surfactant-free polymerization. A pyrolysis coupled with gas chromatography/mass spectrometry method was developed to enable their quantification (limit of detection = 7.4 ng), without extensive sample preparation or significant matrix effects. The 2H-labeled NP were then used to study their toxicity and accumulation in the planktonic crustaceans Daphnia magna (D. magna). Daphnids were exposed for 48 hours to the deuterated NP at different concentrations, including environmentally realistic ones (from 0.03 to 36 mg kg-1). Little to no acute toxicity were observed in this range of concentration. During the experiment, adsorption on polycarbonate well walls was observed, suggesting that the NP concentration during exposure experiments with organisms should be monitored to take into account possible loss. The NP accumulation (mainly in the digestive tract) increased with the exposure concentration, tending to a plateau at higher concentrations. The depuration was also investigated and was significantly higher (97 % against 59 % in average) when the daphnids have access to algae, which highlight the need to add food in D. magna depuration studies to study the NP fate in these organisms. The present study demonstrated the advantages of stable isotope-labeled NP to better understand the processes controlling NP accumulation and impacts on aquatic biota.","PeriodicalId":93933,"journal":{"name":"Chemosphere","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142634425","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0