Chemosphere最新文献_第4页

Magnetically enhanced Fe3O4@ZnO and Fe3O4@ZnO@Bi2O2.7 composites for efficient UV and visible light photodegradation of methyl orange and ofloxacin

IF 8.1 2区环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES

Chemosphere

Pub Date : 2025-04-02 DOI: 10.1016/j.chemosphere.2025.144365

Oksana Makota , Maksym Lisnichuk , Jaroslav Briančin , Jozef Bednarčík , Oleksandr Bondarchuk , Inna Melnyk

引用次数: 0

Electrochemical oxidation for the rapid degradation of emerging contaminants: Insights into electrolytes and process parameters for phytotoxicity reduction

IF 8.1 2区环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES

Chemosphere

Pub Date : 2025-04-02 DOI: 10.1016/j.chemosphere.2025.144363

Camila F. Zorzo , Louidi L. Albornoz , Andréa M. Bernardes , Valentín Pérez-Herranz , Fernando H. Borba , Salatiel W. da Silva

Atrazine (ATZ), carbamazepine (CBZ), and sulfamethoxazole (SMX) are contaminants of emerging concern (CECs) commonly detected in water sources, posing a risk to health, sanitation, and the ecosystems. This study evaluates the degradation, mineralization, and phytotoxicity reduction of a solution containing these three CECs using an electrochemical advanced oxidation process (EAOP). Key operational parameters – pH, flow rate (Q), current density (j), and type and concentration of supporting electrolytes (NaCl and Na₂SO₄) – were systematically investigated. The results showed that pH had minimal impact on the process. Higher flow rates (250 L h⁻¹) improved mineralization due to enhanced mass transfer to ^•OH on the anode surface. However, the flow rate had less effect on degradation, as the dominant degradation mechanisms involved chlorine- or sulfate-based oxidants. Current densities of 1 and 10 mA cm⁻² produced the most favorable results, leading to efficient degradation and mineralization, along with satisfactory mineralization current efficiency (up to 47 %) and energy consumption values (91,76–3142,88 kW h kg⁻¹). When NaCl was used as supporting electrolyte, the degradation of CECs was twice as fast as with Na₂SO₄, achieving over 88 % degradation in 5 min and 40 % mineralization within 60 min. While chlorinated and sulfate species enhance process efficiency, excessive electrolyte concentration should be avoided to prevent scaling and ^•OH scavenging. Phytotoxicity tests with Allium cepa revealed an unexpected reduction in toxicity in samples treated with NaCl, suggesting that Na₂SO₄ may be more phytotoxic under the tested conditions.

{"title":"Electrochemical oxidation for the rapid degradation of emerging contaminants: Insights into electrolytes and process parameters for phytotoxicity reduction","authors":"Camila F. Zorzo , Louidi L. Albornoz , Andréa M. Bernardes , Valentín Pérez-Herranz , Fernando H. Borba , Salatiel W. da Silva","doi":"10.1016/j.chemosphere.2025.144363","DOIUrl":"10.1016/j.chemosphere.2025.144363","url":null,"abstract":"<div><div>Atrazine (ATZ), carbamazepine (CBZ), and sulfamethoxazole (SMX) are contaminants of emerging concern (CECs) commonly detected in water sources, posing a risk to health, sanitation, and the ecosystems. This study evaluates the degradation, mineralization, and phytotoxicity reduction of a solution containing these three CECs using an electrochemical advanced oxidation process (EAOP). Key operational parameters – pH, flow rate (<em>Q</em>), current density (<em>j</em>), and type and concentration of supporting electrolytes (NaCl and Na<sub>2</sub>SO<sub>4</sub>) – were systematically investigated. The results showed that pH had minimal impact on the process. Higher flow rates (250 L h<sup>−1</sup>) improved mineralization due to enhanced mass transfer to <sup>•</sup>OH on the anode surface. However, the flow rate had less effect on degradation, as the dominant degradation mechanisms involved chlorine- or sulfate-based oxidants. Current densities of 1 and 10 mA cm<sup>−2</sup> produced the most favorable results, leading to efficient degradation and mineralization, along with satisfactory mineralization current efficiency (up to 47 %) and energy consumption values (91,76–3142,88 kW h kg<sup>−1</sup>). When NaCl was used as supporting electrolyte, the degradation of CECs was twice as fast as with Na<sub>2</sub>SO<sub>4</sub>, achieving over 88 % degradation in 5 min and 40 % mineralization within 60 min. While chlorinated and sulfate species enhance process efficiency, excessive electrolyte concentration should be avoided to prevent scaling and <sup>•</sup>OH scavenging. Phytotoxicity tests with <em>Allium cepa</em> revealed an unexpected reduction in toxicity in samples treated with NaCl, suggesting that Na<sub>2</sub>SO<sub>4</sub> may be more phytotoxic under the tested conditions.</div></div>","PeriodicalId":276,"journal":{"name":"Chemosphere","volume":"377 ","pages":"Article 144363"},"PeriodicalIF":8.1,"publicationDate":"2025-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143746688","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Breast adipose tissue level of organochlorine pesticides as a risk factor in breast cancer: A cross sectional study in North Indian females

IF 8.1 2区环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES

Chemosphere

Pub Date : 2025-04-01 DOI: 10.1016/j.chemosphere.2025.144339

Krishna Latha Thammineni , Gaurav K. Thakur , Basu Dev Banerjee , Navneet Kaur

Organochlorine pesticides (OCPs) were extensively used in India in agriculture as insecticides and in public health programs to control vector borne diseases like Malaria, and typhus. This rampant use led OCPs to persist in the environment due to their resistance to natural degradation and biotransformation, consequently, enter the human body through the food chain and bio-accumulate in adipose tissue as they are lipophillic. Exposure to OCPs have been linked to various diseases due to their endocrine disrupting properties, and lipophillic nature. The purpose of the study is to estimate the OCPs level in the breast cancer patients, and to compare the OCP levels within breast cancer patients based on their clinical features. A case control study was conducted on 100 breast cancer cases and 100 controls of benign breast disease patients. Quantification of OCPs was done by Gas Chromatography system equipped with 63 Ni Electron Capture Detector. Significantly higher levels of γHCH, Endosulfan-II, p'p’DDT and o'p’DDT were found in cases with respect to controls (p < 0.05). The odds ratios (ORs) show a significant association of Endosulfan-II (1.3) and p'p’DDT (2.7) levels with risk of breast cancer. Further, significantly higher levels of γHCH, p'p’DDT and Endosulfan-II were found in lymph node metastasis cases and γHCH and pp’DDD in advanced tumor stage cases as compared to the cases without lymph node involvement, and early tumor stage respectively. The findings of the present study support the contribution of OCPs in the pathophysiology of breast cancer. Further, OCPs like p’p’DDT, Endosulfan-II, and γHCH may promote the progression of breast cancer by influencing the metastatic ability through lymphatic pathway.

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引用次数: 0

A re-assessment of archived (1989–2006) beluga liver from the North American Arctic with non-targeted analysis reveals brominated chemicals of emerging concern 通过对北美北极地区存档（1989-2006 年）白鲸肝脏进行非目标分析，重新评估发现了新关注的溴化化学品

IF 8.1 2区环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES

Chemosphere

Pub Date : 2025-03-30 DOI: 10.1016/j.chemosphere.2025.144361

Jacqueline Bangma , Chris Fuller , James McCord , Heather Whitehead , Richard Liberatore , Jason Boettger , Amanda Moors , Rebecca Pugh , Steven G. O'Connell , Jessica L. Reiner

In 2011, 68 archived beluga whale (Delphinapterus leucas) liver samples collected from Cook Inlet and the eastern Chukchi Sea from 1989 to 2006 were characterized for 12 per- and polyfluoroalkyl substances (PFAS) using targeted mass spectroscopy (MS) methods; however, at the time of the original analysis, high resolution MS (HRMS) methods were not readily available. This follow-up study utilizes both targeted as well as cutting-edge HRMS non-targeted analysis (NTA) techniques to screen for additional PFAS as well as potential contaminants of emerging concern (CECs) in the chemical space under investigation. Targeted analysis detected perfluorodecanesulfonic acid (PFDS) and perfluoroheptane sulfonic acid (PFHpS) in 10 % and 9 % of liver samples, respectively. PFDS detections were observed only in Cook Inlet whales while PFHpS was detected in whales from both locations. In addition, NTA identified four dibrominated pyrrole ring structures two with a sulfate (C₈H₁₁NBr₂SO₃, and C₉H₁₃NBr₂SO₃, Schymanski level 3), and two with either a sulfonate or a sulfate and hydroxy group (C₈H₁₁NBr₂SO₄, C₉H₁₃NBr₂SO₄, Schymanski level 4) in whales from the eastern Chukchi Sea. Literature search reveals similar brominated metabolites from marine bacteria, sponges, and other marine organisms, suggesting the brominated CECs are of marine origin.

2011 年，利用目标质谱 (MS) 方法对 1989 年至 2006 年期间从库克湾和楚科奇海东部采集的 68 份存档白鲸（Delphinapterus leucas）肝脏样本中的 12 种全氟化合物和多氟烷基物质 (PFAS) 进行了表征；但是，在最初进行分析时，还没有高分辨率质谱 (HRMS) 方法。本后续研究采用了靶向分析和尖端的 HRMS 非靶向分析 (NTA) 技术，以筛查更多的 PFAS 以及所调查化学空间中潜在的新关注污染物 (CEC)。靶向分析分别在 10% 和 9% 的肝脏样本中检测到了全氟癸烷磺酸 (PFDS) 和全氟庚烷磺酸 (PFHpS)。仅在库克湾鲸鱼体内检测到 PFDS，而在两个地点的鲸鱼体内均检测到 PFHpS。此外，NTA 还在楚科奇海东部的鲸鱼体内发现了四种二溴吡咯环结构，其中两种带有硫酸盐（C8H11NBr2SO3 和 C9H13NBr2SO3，Schymanski 3 级），另外两种带有磺酸盐或硫酸盐和羟基（C8H11NBr2SO4 和 C9H13NBr2SO4，Schymanski 4 级）。文献检索显示，海洋细菌、海绵和其他海洋生物中也存在类似的溴化代谢物，这表明溴化 CEC 来源于海洋。

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引用次数: 0

Photocatalytic remediation of organic pollutants in contaminated water using trimetallic zeolitic imidazole framework: From methylene blue to wastewater

IF 8.1 2区环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES

Chemosphere

Pub Date : 2025-03-29 DOI: 10.1016/j.chemosphere.2025.144362

Joohyun Kim, Jung Hyeun Kim

Photocatalysts have recently attracted significant attention for their ability to efficiently degrade organic contaminants in wastewater under sunlight irradiation conditions. In this study, trimetallic Zn–ZIF photocatalyst is synthesized by incorporating Ni– and Cd–dopant atoms to enhance photocatalytic performance. Morphological and crystallographic analyses confirm the formation of the ZIF−L structure. Compared to monometallic and bimetallic variants, the trimetallic ZIF exhibits enhanced optical absorbance. PL analysis indicates that additional impurities introduce more active sites, resulting in improved photocatalytic performance. Trimetallic N2C4 ZIF photocatalyst shows the highest organic degradability with 95.1 % MB degradation, with stable second-order kinetics derived primarily from superoxide radicals. The catalyst also effectively degrades melanoidin chromophore in coffee and wastewater. This work demonstrates a promising approach to developing broadly applicable ZIF photocatalysts to photodegrade various polluted environmental systems.

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引用次数: 0

Water circularity index: A novel approach for authorities and operators

IF 8.1 2区环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES

Chemosphere

Pub Date : 2025-03-29 DOI: 10.1016/j.chemosphere.2025.144366

Anabela Rebelo , Genève Farabegoli

The “transition to a circular economy” is frequently articulated in conventional frameworks regarding water use efficiency, predominantly emphasizing quantitative dimensions. However, water is ubiquitous, and its various applications are often directly or indirectly interlinked. Examining water quantity and quality within the water usage cycle is imperative to ensure security and optimise added value throughout the process while promoting the natural values of the surrounding environment. The present study introduces an innovative metric known as the Water Circularity Index (I_C) that encompasses the complex balance between water quantity and quality throughout the water cycle at urban and industrial installation levels. The methodology for developing the I_C is supported by a Multi-Criteria Decision Analysis, where key factors are divided into sub-factors categorised and weighted. The I_C comprises eleven key factors, including freshwater consumption, wastewater discharge, water reuse, best management practices and technologies, hazardous substances defined under the Water Framework Directive, microplastics and emerging contaminants, biodiversity, nutrient recovery, internal industrial symbiosis, sludge management, and voluntary or incentive-based instruments. For each key factor, inputs are classified as negative, neutral, or positive, with final results categorised into five levels: negative circularity, no circularity, and low, medium, or high circularity. The index was applied to facilities across seven countries, encompassing fourteen installations across various industrial sectors and urban wastewater treatment plants, showing the versatility of the index in promoting best practices in multiple processes. In one case study involving a pulp mill, the I_C was computed before and after the revision of its environmental permit. This assessment facilitated an evaluation of the measures implemented during the transition from a discharge permit aligned exclusively with the Industrial Emissions Directive principles to an integrated water management approach that integrated both directives' frameworks. The findings revealed a substantial improvement in the plant's performance, progressing from negative to medium circularity.

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引用次数: 0

Arsenic biotransformation by macroalgae Srgassum thunbergii: Influence of growth stages and phosphate availability on uptake and reductive methylation

IF 8.1 2区环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES

Chemosphere

Pub Date : 2025-03-29 DOI: 10.1016/j.chemosphere.2025.144333

Rakhi Rani Datta , Rimana Islam Papry , Yusuke Asakura , Ryo Kagaya , Kuo Hong Wong , Asami Suzuki Mashio , Hiroshi Hasegawa

Investigations into arsenic (As) biotransformation in marine macroalgae are crucial for understanding environmental and human health impacts. However, the biomethylation of As at different growth stages of macroalgae remains unclear. This study investigated arsenate [As(V)] uptake and reductive methylation at four different growth stages (young, pre-juvenile, juvenile and adult) of marine macroalgae species. The frond of varied growth stages of Sargassum thunbergii were exposed to 1.0 μmol L⁻¹ As(V) and varying phosphate (P) concentrations (0.8, 10, and 20 μmol L⁻¹) in filtered seawater for 14 days. The P concentration 0.8 μmol L⁻¹ indicate nutrient poor condition, whereas P10 and 20 represents environmental or intermediate level and eutrophic P level in seawater respectively. The results showed a significant variations in As(V) uptake at different growth stages, with lower uptake in young sporophyte and higher uptake in pre-juvenile and juvenile sporophytes at P10 and 20 μmol L⁻¹ concentrations. Biotransformation of internalized As(V) to dimethylarsinic acid (DMAA) occurred earlier in young sporophyte compared to juvenile sporophyte. The biotransformation of As(V) and release capacity across the growth stages follows the order of young sporophyte > pre-juvenile sporophyte > adult sporophyte > juvenile sporophyte. A significant difference in As bioaccumulation pattern was also observed at low (P0 and P10) and high (P20) P conditions, underscoring the competitive uptake mechanism of As(V) over the P concentration. Meanwhile total As content increased in the order of adult sporophyte > pre-juvenile sporophyte > juvenile sporophyte > young sporophyte indicating growth stage-specific As(V) uptake and metabolism. These findings deepen our understanding of As(V) biotransformation processes in macroalgae and contribute to elucidating complex interactions between macroalgal growth stages and As(V).

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引用次数: 0

Investigating iodine-129 in coral cores along East Philippines as a tracer of the North Equatorial Current bifurcation and marker of the Anthropocene

IF 8.1 2区环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES

Chemosphere

Pub Date : 2025-03-28 DOI: 10.1016/j.chemosphere.2025.144342

Angel T. Bautista VII , Sophia Jobien M. Limlingan , Jeff Darren G. Valdez , Mary Magareth T. Bauyon , Remjohn Aron H. Magtaas , Arvin M. Jagonoy , Joseph Michael D. Racho , Aldrin Jan E. Tabuso , John Kenneth C. Valerio , Araceli M. Monsada , Edwin E. Dumalagan Jr. , Keanu Jershon S. Sarmiento , Miwako Toya , Fernando P. Siringan , Hiroyuki Matsuzaki

Measuring ¹²⁹I in natural archives is an excellent way of reconstructing the historical impacts of human nuclear activities (HNA) and tracing their transport through the environment. Currently, understanding of ¹²⁹I transport from the North to the South Pacific Ocean is limited, given that most HNA were conducted in the northern hemisphere. Here, we show the ¹²⁹I/¹²⁷I time series of two coral cores, namely Calaguas and Cantilan, located along the north (Kuroshio Current) and south (Mindanao Current) bifurcations of the North Equatorial Current (NEC) – a crucial region that acts as a gateway from the North to the South Pacific Ocean. Measurement and mathematical modeling results show that HNA impacts are transported and divided almost equally between the north and south bifurcations of the NEC. Moreover, it takes around three years for the ¹²⁹I signals from the Philippines to reach Australia. In recent times, when ¹²⁹I in the Pacific Ocean has been more saturated, ¹²⁹I transport from the North to the South Pacific Ocean appear to be affected by the variabilities associated with the El Niño Southern Oscillation and the Pacific Decadal Oscillation, as these influence the strengths and positions of the north and south bifurcations of the NEC. Lastly, our results affirm that ¹²⁹I records are excellent candidates for marking the beginning of the Anthropocene.

{"title":"Investigating iodine-129 in coral cores along East Philippines as a tracer of the North Equatorial Current bifurcation and marker of the Anthropocene","authors":"Angel T. Bautista VII , Sophia Jobien M. Limlingan , Jeff Darren G. Valdez , Mary Magareth T. Bauyon , Remjohn Aron H. Magtaas , Arvin M. Jagonoy , Joseph Michael D. Racho , Aldrin Jan E. Tabuso , John Kenneth C. Valerio , Araceli M. Monsada , Edwin E. Dumalagan Jr. , Keanu Jershon S. Sarmiento , Miwako Toya , Fernando P. Siringan , Hiroyuki Matsuzaki","doi":"10.1016/j.chemosphere.2025.144342","DOIUrl":"10.1016/j.chemosphere.2025.144342","url":null,"abstract":"<div><div>Measuring <sup>129</sup>I in natural archives is an excellent way of reconstructing the historical impacts of human nuclear activities (HNA) and tracing their transport through the environment. Currently, understanding of <sup>129</sup>I transport from the North to the South Pacific Ocean is limited, given that most HNA were conducted in the northern hemisphere. Here, we show the <sup>129</sup>I/<sup>127</sup>I time series of two coral cores, namely Calaguas and Cantilan, located along the north (Kuroshio Current) and south (Mindanao Current) bifurcations of the North Equatorial Current (NEC) – a crucial region that acts as a gateway from the North to the South Pacific Ocean. Measurement and mathematical modeling results show that HNA impacts are transported and divided almost equally between the north and south bifurcations of the NEC. Moreover, it takes around three years for the <sup>129</sup>I signals from the Philippines to reach Australia. In recent times, when <sup>129</sup>I in the Pacific Ocean has been more saturated, <sup>129</sup>I transport from the North to the South Pacific Ocean appear to be affected by the variabilities associated with the El Niño Southern Oscillation and the Pacific Decadal Oscillation, as these influence the strengths and positions of the north and south bifurcations of the NEC. Lastly, our results affirm that <sup>129</sup>I records are excellent candidates for marking the beginning of the Anthropocene.</div></div>","PeriodicalId":276,"journal":{"name":"Chemosphere","volume":"377 ","pages":"Article 144342"},"PeriodicalIF":8.1,"publicationDate":"2025-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143716012","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Environmental distributions of phthalates in sediments affected by municipal wastewater in the South-eastern Black Sea

IF 8.1 2区环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES

Chemosphere

Pub Date : 2025-03-28 DOI: 10.1016/j.chemosphere.2025.144364

Nigar Alkan , Ali Alkan , Bekir Salih , Cemre Yilmaz , Osman Üçüncü

Concerning pollutants, such as chemicals used as additives in plastics, are becoming more and more prevalent in the environment. Information on the temporal and spatial distribution of these contaminants is still scarce in the Black Sea, one of the world's unique ecosystems and a closed sea. This study provides the preliminary data on the quantities and distribution of phthalate acid esters (PAEs) in surface sediment samples collected from the coast of the south-eastern Black Sea in Turkiye. Following solid phase extraction, phthalate levels were measured by Gas Chromatography-Mass Spectrometry (GC-MS) in sediment samples collected during two distinct time periods from 21 stations that covered the locations where pretreated urban wastewater was released. While substantial PAE concentrations were observed in deep sea discharge locations, PAE concentrations were found to be lower at stations away from deep sea discharge and river impact. PAE levels in sediment were found to be between 3.76 and 50.57 ng/g dry weight (dw) in this research, which is lower than the values recorded in a majority of the world. DHP was determined to be the most abundant high molecular weight phthalate, whereas DEP was the most abundant low molecular weight phthalate.

{"title":"Environmental distributions of phthalates in sediments affected by municipal wastewater in the South-eastern Black Sea","authors":"Nigar Alkan , Ali Alkan , Bekir Salih , Cemre Yilmaz , Osman Üçüncü","doi":"10.1016/j.chemosphere.2025.144364","DOIUrl":"10.1016/j.chemosphere.2025.144364","url":null,"abstract":"<div><div>Concerning pollutants, such as chemicals used as additives in plastics, are becoming more and more prevalent in the environment. Information on the temporal and spatial distribution of these contaminants is still scarce in the Black Sea, one of the world's unique ecosystems and a closed sea. This study provides the preliminary data on the quantities and distribution of phthalate acid esters (PAEs) in surface sediment samples collected from the coast of the south-eastern Black Sea in Turkiye. Following solid phase extraction, phthalate levels were measured by Gas Chromatography-Mass Spectrometry (GC-MS) in sediment samples collected during two distinct time periods from 21 stations that covered the locations where pretreated urban wastewater was released. While substantial PAE concentrations were observed in deep sea discharge locations, PAE concentrations were found to be lower at stations away from deep sea discharge and river impact. PAE levels in sediment were found to be between 3.76 and 50.57 ng/g dry weight (dw) in this research, which is lower than the values recorded in a majority of the world. DHP was determined to be the most abundant high molecular weight phthalate, whereas DEP was the most abundant low molecular weight phthalate.</div></div>","PeriodicalId":276,"journal":{"name":"Chemosphere","volume":"377 ","pages":"Article 144364"},"PeriodicalIF":8.1,"publicationDate":"2025-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143726053","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Novel integrated workflow for microplastics extraction, quantification, and characterization in organic fertilizing residuals using micro-Fourier transform infrared spectroscopy (μ-FTIR)

IF 8.1 2区环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES

Chemosphere

Pub Date : 2025-03-28 DOI: 10.1016/j.chemosphere.2025.144357

Mohamed Zakaria Gouda , Steeve Roberge , Lotfi Khiari , Rim Benjannet , Mélanie Desrosiers

Organic fertilizing residuals (OFRs) enhance soil fertility and support sustainable agriculture due to their rich nutrient and organic matter content. However, these materials are increasingly recognized as a significant source of microplastics (MPs) in agricultural soils, raising concerns about the safety of agroecosystems. Therefore, there is an urgent need to develop a reliable workflow for MP analysis in diverse OFRs, given the challenges of extracting small MPs from such organic matter-rich matrices. This study presents an oxidative-alkaline tandem digestion method that achieves an average organic matter (OM) removal efficiency of 93 % across various OFRs. In addition, density centrifugation with NaCl and ZnCl₂ brines was utilized to recover six microplastic polymers (PP, PVC, PET, PS, PE, and HDPE), achieving a recovery rate of over 95 % for large MPs (600 μm–4.75 mm) and over 83 % for small MP-PE beads (38–45 μm). Micro-Fourier transform infrared spectroscopy (μ-FTIR) analysis confirmed that digestion and separation steps did not affect MPs' spectral integrity and chemical identification. To validate the workflow, we applied it to analyze MPs in various OFRs from Québec, allowing for the successful detection of 19 MP polymers with sizes down to 10–50 μm. This workflow can be applied to multiple OFRs to extract, quantify, and characterize MPs. Ultimately, this workflow will facilitate efficient MPs analysis across diverse OFRs, providing essential data for robust risk assessment and better environmental management to mitigate MP pollution from OFR applications in agricultural soils.

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引用次数: 0