Chemosphere最新文献_第5页

Emerging threats in Сentral Asia: Comparative characterization of organic and elemental carbon in ambient PM_2.5 in urban cities of Kazakhstan. 中亚新出现的威胁：哈萨克斯坦城市环境PM2.5中有机碳和元素碳的比较特征。

Chemosphere Pub Date : 2025-02-01 Epub Date: 2024-12-28 DOI: 10.1016/j.chemosphere.2024.143968

Anara Omarova, Olga P Ibragimova, Madina Tursumbayeva, Bauyrzhan Bukenov, Kazbek Tursun, Ravkat Mukhtarov, Ferhat Karaca, Nassiba Baimatova

{"title":"Emerging threats in Сentral Asia: Comparative characterization of organic and elemental carbon in ambient PM2.5 in urban cities of Kazakhstan.","authors":"Anara Omarova, Olga P Ibragimova, Madina Tursumbayeva, Bauyrzhan Bukenov, Kazbek Tursun, Ravkat Mukhtarov, Ferhat Karaca, Nassiba Baimatova","doi":"10.1016/j.chemosphere.2024.143968","DOIUrl":"10.1016/j.chemosphere.2024.143968","url":null,"abstract":"This study (June 2022-July 2023) investigates the atmospheric concentrations of carbonaceous species, including organic carbon (OC) and elemental carbon (EC), in PM2.5 in two major cities in Kazakhstan. Samples were collected from two sites in Almaty (Seifullin and KazNU) and one in Astana. The results showed that Almaty had significantly higher annual average concentrations of OC (10.8 and 10.5 μg/m3) and EC (1.68 and 1.87 μg/m3) compared to Astana (OC: 7.1 μg/m3, EC: 0.61 μg/m3). Both cities exhibited pronounced seasonal variations, with significantly elevated concentrations (1.5-3.4 times for OC, 2.1-4.8 times for EC) during the heating season compared to the non-heating season. This indicates a significant influence of coal and biomass combustion for heating on carbonaceous aerosol concentrations. Both cities' OC/EC ratios varied widely (2.6-39.4), showing strong positive correlations (0.61-0.94) across all seasons except summer, suggesting a common primary emission source. Primary organic carbon dominated OC levels in winter (71-74%), whereas secondary organic carbon contributed significantly to OC concentrations in summer (43-50%). Higher OC-EC concentrations correlated with lower atmospheric visibility values. The OC-EC contributions to the total light extinction coefficient were estimated to be 15.3-15.9% for Almaty and 12.0% for Astana stations.","PeriodicalId":93933,"journal":{"name":"Chemosphere","volume":" ","pages":"143968"},"PeriodicalIF":0.0,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142857329","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

Corrigendum to 'Deciphering the toxicity of polyhexamethylene guanidine phosphate in lung carcinogenesis: Mutational profiles and molecular mechanisms' [Chemosphere Volume 368 (2024) 143785]. “破译聚六亚甲基胍磷酸在肺癌发生中的毒性：突变谱和分子机制”的勘误表[Chemosphere卷368(2024)143785]。

Chemosphere Pub Date : 2025-02-01 Epub Date: 2024-12-31 DOI: 10.1016/j.chemosphere.2024.144045

Hong Lee, Sang Hoon Jeong, Yong-Wook Baek, Hyejin Lee, Jason K Sa, Ji Yoon Lee, Yu-Seon Lee, Yoon Jeong Nam, Jaeyoung Kim, Jonghoon Kim, Jin Young Choi, Su A Park, Je Hyeong Kim, Yoon Hee Park, Jungyun Lim, Young-Hee Kim, Eun-Kee Park, Cherry Kim, Ju-Han Lee

引用次数: 0

Nationwide monitoring of polychlorinated naphthalenes in soils across South Korea: Spatial distribution, source identification, and health risk assessment. 在韩国全国范围内监测土壤中的多氯化萘：空间分布、来源识别和健康风险评估。

Chemosphere Pub Date : 2025-02-01 Epub Date: 2024-12-26 DOI: 10.1016/j.chemosphere.2024.143962

Jin-Woo Jeon, Chul-Su Kim, Ho-Joong Kim, Seung-Man Hwang, Chang-Ho Lee, Sung-Deuk Choi

{"title":"Nationwide monitoring of polychlorinated naphthalenes in soils across South Korea: Spatial distribution, source identification, and health risk assessment.","authors":"Jin-Woo Jeon, Chul-Su Kim, Ho-Joong Kim, Seung-Man Hwang, Chang-Ho Lee, Sung-Deuk Choi","doi":"10.1016/j.chemosphere.2024.143962","DOIUrl":"10.1016/j.chemosphere.2024.143962","url":null,"abstract":"The production and use of polychlorinated naphthalenes (PCNs) were banned several decades ago, but they continue to be detected due to their persistence in surface environments and ongoing emissions from combustion-related sources. This study presents the first nationwide monitoring data for PCNs in soils collected from 61 sites across South Korea. Industrial sites (mean: 127 pg/g, median: 91.4 pg/g) exhibited higher concentrations of Σ63 PCNs than urban (mean: 53.1 pg/g, median: 50.0 pg/g) and suburban (mean: 52.2 pg/g, median: 23.3 pg/g) sites. Tri- and tetra-CNs were the dominant homologues, with CN-14/24 being the most abundant congeners. The majority of PCN contamination at these sites was attributed to combustion sources and historical emissions from Halowax mixtures. Σ63 PCNs and toxic equivalencies (TEQs) were moderately correlated with the number of companies potentially emitting PCNs, industrial electricity usage, and SO2 concentrations, indicating a significant influence of anthropogenic sources on PCN contamination. The 95th percentile cancer risks for both adults and children across all sites were within the acceptable range (<10-6) set by the US EPA. However, the higher risks observed for children underscore the importance of ongoing PCN monitoring. This study provides valuable insights into the spatial distribution and human exposure to PCNs in soils across South Korea. Based on these initial nationwide findings, comprehensive monitoring of PCNs and other dioxin-like compounds in industrial areas is recommended.","PeriodicalId":93933,"journal":{"name":"Chemosphere","volume":" ","pages":"143962"},"PeriodicalIF":0.0,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142848645","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

Organophosphate flame retardants and their metabolites in paired dog food and urine: Pet exposure through food consumption. 配对狗粮和尿液中的有机磷酸酯阻燃剂及其代谢物：宠物通过食物摄入暴露。

Chemosphere Pub Date : 2025-02-01 Epub Date: 2024-12-19 DOI: 10.1016/j.chemosphere.2024.143960

So-Hwi Park, Pil Jun Yun, Youngmin Hong, Ki-Tae Kim, Gyojin Choo

{"title":"Organophosphate flame retardants and their metabolites in paired dog food and urine: Pet exposure through food consumption.","authors":"So-Hwi Park, Pil Jun Yun, Youngmin Hong, Ki-Tae Kim, Gyojin Choo","doi":"10.1016/j.chemosphere.2024.143960","DOIUrl":"10.1016/j.chemosphere.2024.143960","url":null,"abstract":"Companion dogs are exposed to various chemicals. However, our understanding of the sources and pathways of chemical exposure in pets remains limited. In this study, we collected urine samples from 47 dogs and corresponding samples of the food they consumed to analyze the concentrations and dietary exposure to organophosphate flame retardants (OPFRs) and their metabolites (mOPFRs). Triphenyl phosphate (TPHP) and its metabolite, diphenyl phosphate (DHPH), were the predominant compounds detected in dog food and urine samples. The concentration of mOPFRs in urine decreased as body weight increased; however, neither sex nor age significantly influenced mOPFR levels in dog urine. The estimated daily intake of OPFRs (343 ng/kg bw/day) through food consumption (EDIfood) was comparable to the previously reported levels of polycyclic aromatic hydrocarbons (324 ng/kg bw/day) and higher than those of pesticides (214 ng/kg bw/day), parabens (120 ng/kg bw/day), and polychlorinated biphenyls (103 ng/kg bw/day). By calculating the ratio of EDIfood to the cumulative daily intake based on urinary mOPFR concentrations, it was found that dietary sources contributed to 66% of the total TPHP exposure in dogs. This finding was further supported by Spearman's correlation analysis between parent OPFR concentrations in dog food and mOPFR levels in urine (p < 0.01), indicating that dietary intake may be one of the most significant exposure pathways for OPFRs in dogs. To the best of our knowledge, this is the first study to investigate the levels of OPFR exposure in paired dog food and urine samples.","PeriodicalId":93933,"journal":{"name":"Chemosphere","volume":" ","pages":"143960"},"PeriodicalIF":0.0,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142857343","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

Heterogeneous catalysts for electro-Fenton degradation of cytostatic drug cytarabine. 电fenton降解细胞抑制药物阿糖胞苷的多相催化剂。

Chemosphere Pub Date : 2025-02-01 Epub Date: 2024-12-11 DOI: 10.1016/j.chemosphere.2024.143892

Şule Camcıoğlu, Baran Özyurt, Nihal Oturan, David Portehault, Clément Trellu, Mehmet A Oturan

{"title":"Heterogeneous catalysts for electro-Fenton degradation of cytostatic drug cytarabine.","authors":"Şule Camcıoğlu, Baran Özyurt, Nihal Oturan, David Portehault, Clément Trellu, Mehmet A Oturan","doi":"10.1016/j.chemosphere.2024.143892","DOIUrl":"10.1016/j.chemosphere.2024.143892","url":null,"abstract":"In the present work, a reduced graphene oxide (rGO) modified-Fe3O4 doped bifunctional carbon felt cathode (rGO-Fe3O4/CF) that is capable of generating and converting H2O2 into hydroxyl radicals (•OH) on-site was fabricated, thus removing the need for an external catalyst. In addition, an rGO-modified cathode (rGO/CF) with high H2O2 production efficiency and a heterogeneous Fenton catalyst (CNT-Fe3O4) with magnetic properties were fabricated. The study examined the degradation and mineralization of the cytostatic drug cytarabine (CYT) using two HEF configurations: (i) a bifunctional cathode rGO-Fe3O4/CF and (ii) a combination of the rGO/CF cathode with CNT-Fe3O4 catalyst. The effects of parameters such as catalyst concentration, initial pH, and applied current were studied. HPLC and ion chromatography analyses were used to identify carboxylic acids and inorganic end-products, respectively. The results show that 0.1 mM CYT was completely degraded within 18 min at an applied current of 300 mA in the HEF system with the rGO-Fe3O4/CF bifunctional cathode. Total organic carbon (TOC) analysis revealed that the bifunctional cathode system achieved 98.2% mineralization of CYT after 4 h of treatment at 300 mA. Using the rGO/CF cathode and CNT-Fe3O4 catalyst cell, total degradation of 0.1 mM CYT occurred within 7 min, and nearly total mineralization (97.3% TOC removal) was achieved at 300 mA after 4 h.","PeriodicalId":93933,"journal":{"name":"Chemosphere","volume":" ","pages":"143892"},"PeriodicalIF":0.0,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142788107","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

Monitoring of organochlorine pesticides using pine needle, pine bark, and soil samples across South Korea: Source apportionment and implications for atmospheric transport. 利用韩国松针、松皮和土壤样本监测有机氯农药：来源解析及其对大气运输的影响。

Chemosphere Pub Date : 2025-02-01 Epub Date: 2024-12-31 DOI: 10.1016/j.chemosphere.2024.144043

Sanjenbam Nirmala Khuman, Ho-Young Lee, In-Gyu Cho, David Chung, Soo Yong Lee, Jangho Lee, Jung-Keun Oh, Sung-Deuk Choi

{"title":"Monitoring of organochlorine pesticides using pine needle, pine bark, and soil samples across South Korea: Source apportionment and implications for atmospheric transport.","authors":"Sanjenbam Nirmala Khuman, Ho-Young Lee, In-Gyu Cho, David Chung, Soo Yong Lee, Jangho Lee, Jung-Keun Oh, Sung-Deuk Choi","doi":"10.1016/j.chemosphere.2024.144043","DOIUrl":"10.1016/j.chemosphere.2024.144043","url":null,"abstract":"Pine needle, pine bark, and soil samples were collected from various regions in South Korea, considering the suitability of vegetation samples as passive samplers. A total of 27 organochlorine pesticides (OCPs) were analyzed using a gas chromatograph/high-resolution mass spectrometer (GC/HRMS). The total concentrations of OCPs ranged between 650 and 3652 pg/g dw in soil, 215 and 1384 pg/g ww in pine needles, and 456 and 1723 pg/g ww in pine bark. Metabolites such as endosulfan sulfate, p,p'-DDE, and p,p'-DDD were dominant in the soil samples, whereas parent compounds were more prevalent in the pine needles. Diagnostic ratios and compositional profiles suggested that potential OCP sources were primarily related to historical use, atmospheric transport, and unintentional byproducts. OCPs that were never used or registered in South Korea were also detected in all sample types, indicating atmospheric transport from source regions. Sites closer to North Korea and China showed higher concentrations of OCPs, with levels gradually decreasing from west to east in the soil, suggesting long-range atmospheric transport from the source regions. Fugacity fractions indicated net volatilization for most compounds, while net deposition was observed for others, suggesting a dynamic equilibrium. This study concludes that atmospheric transport plays a predominant role in the distribution and fate of OCPs in the environment, with no evidence of current local sources.","PeriodicalId":93933,"journal":{"name":"Chemosphere","volume":" ","pages":"144043"},"PeriodicalIF":0.0,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142904379","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

Retraction notice to "Computational simulation associated with biological effects of alkyl organophosphate flame retardants with different carbon chain lengths on Chlorella pyrenoidosa"[Chemosphere 263 (2021) 127997]. 不同碳链长度的有机磷烷基阻燃剂对小球藻（Chlorella pyrenoidosa）生物效应的计算模拟 "的撤稿通知[Chemosphere 263 (2021) 127997]。

Chemosphere Pub Date : 2025-02-01 Epub Date: 2024-12-14 DOI: 10.1016/j.chemosphere.2024.143830

Yuhao Chu, Chaofan Zhang, Shih-Hsin Ho

引用次数: 0

Kinetic and isotherm study for the adsorption of per- and polyfluoroalkyl substances (PFAS) on activated carbon in the low ng/L range. 低ng/L活性炭吸附全氟烷基和多氟烷基物质的动力学和等温线研究。

Chemosphere Pub Date : 2025-02-01 Epub Date: 2024-12-21 DOI: 10.1016/j.chemosphere.2024.143889

Marko Pranić, Livio Carlucci, Albert van der Wal, Jouke E Dykstra

{"title":"Kinetic and isotherm study for the adsorption of per- and polyfluoroalkyl substances (PFAS) on activated carbon in the low ng/L range.","authors":"Marko Pranić, Livio Carlucci, Albert van der Wal, Jouke E Dykstra","doi":"10.1016/j.chemosphere.2024.143889","DOIUrl":"10.1016/j.chemosphere.2024.143889","url":null,"abstract":"Activated carbon adsorption is a widely used technology for the removal of per- and polyfluoroalkyl substances (PFAS). However, the rapid breakthrough of PFAS in activated carbon filters poses a challenge to meet the very low allowable PFAS concentrations in drinking water, leading to high operational costs. In this study, we conducted batch isotherm and kinetic adsorption experiments using nine different types of PFAS molecules at concentrations typically found in water sources used for drinking water production (0.1-100 ng/L). The isotherm experiments at these low concentrations reveal that the maximum adsorption capacity of several PFAS is much lower than reported in literature. The estimated isotherms were included in a dynamic model that includes mass transport based on surface diffusion. This model effectively describes the experimental kinetic data, and the obtained surface diffusion coefficients indicate a very slow PFAS surface mobility. Additionally, our findings indicate that PFAS surface mobility decreases in scenarios with more available adsorption sites. Notably, mesoporous activated carbon, with its higher adsorption capacity, exhibits lower PFAS surface mobility than microporous carbon with lower PFAS adsorption capacity. Moreover, for both carbons, we observed a decrease in PFAS surface mobility at higher carbon loadings when the surface is less saturated with PFAS. Our findings suggest potential inherent limitations in activated carbon technology for PFAS removal under environmentally relevant conditions, as we observed lower adsorption capacities than previously reported at higher concentrations, and a decrease in PFAS surface mobility with more available adsorption sites.","PeriodicalId":93933,"journal":{"name":"Chemosphere","volume":" ","pages":"143889"},"PeriodicalIF":0.0,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142788108","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

Enhanced coagulation of Microcystis aeruginosa using titanium xerogel coagulant. 钛干凝胶絮凝剂对铜绿微囊藻的强化絮凝作用。

Chemosphere Pub Date : 2025-02-01 Epub Date: 2024-12-31 DOI: 10.1016/j.chemosphere.2024.144017

Shulian Wang, Yanqun Li, Lu Cai, Xian Yang, Kewu Pi, Zhu Li

{"title":"Enhanced coagulation of Microcystis aeruginosa using titanium xerogel coagulant.","authors":"Shulian Wang, Yanqun Li, Lu Cai, Xian Yang, Kewu Pi, Zhu Li","doi":"10.1016/j.chemosphere.2024.144017","DOIUrl":"10.1016/j.chemosphere.2024.144017","url":null,"abstract":"Cyanobacterial blooms are prevalent globally and present a significant threat to water security. Titanium salt coagulants have garnered considerable attention due to their superior coagulation properties and the absence of metal residue risks. This paper explored the influencing factors in the coagulation process of titanium xerogel coagulant (TXC), the alterations in cell activity during floc storage, and the release of cyanobacterial organic matters, thereby determining the application scope of TXC for cyanobacterial water treatment. The findings indicated that at a TXC dosage of 8 mg Ti/L, the removal rate of Microcystis aeruginosa (M. aeruginosa) exceeded 86% across a pH range of 5-9. The coagulation performance with anions HCO3-, CO32- and H2PO4-/HPO42- was unsatisfactory at concentrations of 10, 20, and 50 mg/L, with corresponding chlorophyll a (Chl-a) levels of 168, 129, and 196 μg/L, respectively. While the presence of Cl-, NO3-, SO42-, K+, NH4+, Ca2+ and Mg2+ had little influence on the removal efficiency. At sodium alginate (SA) concentration of 6 mg/L, the Chl-a content was 116 μg/L, with humic acid (HA) not affecting M. aeruginosa removal but hindering turbidity reduction, leaving a residual turbidity of 11 NTU. Following TXC treatment, a floc storage study with cyanobacteria-laden surface water showed a decrease in microcystins (MCs) content. The low residual titanium concentration post-TXC coagulation (<0.06 mg/L) and MCs reduction contributed to reduced effluent toxicity, indicating TXC's versatile applicability for treating cyanobacterial-contaminated waters.","PeriodicalId":93933,"journal":{"name":"Chemosphere","volume":" ","pages":"144017"},"PeriodicalIF":0.0,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142900620","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

Retraction notice to "Recent advancements of spinel ferrite based binary nanocomposite photocatalysts in wastewater treatment"[Chemosphere 274 (2021) 129734]. 引用本文：“尖晶石铁氧体基二元纳米复合光催化剂在废水处理中的研究进展”[j]。

Chemosphere Pub Date : 2025-02-01 Epub Date: 2024-12-28 DOI: 10.1016/j.chemosphere.2024.143841

R Suresh, Saravanan Rajendran, P Senthil Kumar, Dai-Viet N Vo, Lorena Cornejo-Ponce

引用次数: 0