Chemosphere最新文献

{"title":"Mechanisms of enhanced Cr (VI) removal by waste lignin derived N-doped hierarchical porous carbon (N-HPC).","authors":"Huirong Zhang, Yi Shen, Lin Luo, Zihe Pan, Xiaokai Shi, Baofeng Wang, Dongke Zhang, Fangqin Chen","doi":"10.1016/j.chemosphere.2024.143989","DOIUrl":"https://doi.org/10.1016/j.chemosphere.2024.143989","url":null,"abstract":"<p><p>N-doped hierarchical porous carbon (N-HPC) is made from waste lignin by a one-pot method, and its mechanisms of Cr (VI) removal was investigated. The specific surface area (S_BET) of N-HPC-Fe3 was 1749.8 m²/g, the experimentally determined equilibrium adsorption capacity (q_e) for Cr (VI) was 386.5 mg/g, and the calculated maximum adsorption capacity (q_m) was 627.1 mg/g, which showed excellent adsorption performance. The adsorption process is consistent with the Langmuir model and the pseudo-second-order model. The removal process of Cr (VI) was proposed: the high specific surface area and positively charged surface of N-HPC enhanced the pore filling and electrostatic adsorption effects; and the high content of nitrogen-oxygen functional groups acted as electron donors and adsorption active sites, which reduced Cr (VI) to Cr (III) and complexed it to the N-HPC surface. The contribution of different mechanisms was quantified and 85.1% reduction was the main removal mechanism. The removal efficiency of N-HPC reached 76.5% after 7 cycles and was minimally affected by coexisting ions, showing excellent reusability, stability and selectivity. This study emphasizes the potential of using cost-effective and sustainable biomass waste carbon for Cr (VI) removal, providing a theoretical and practical basis for environmental remediation.</p>","PeriodicalId":93933,"journal":{"name":"Chemosphere","volume":" ","pages":"143989"},"PeriodicalIF":0.0,"publicationDate":"2024-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142866745","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}

{"title":"Occurrence, seasonal variation, and environmental risk of multiclass antibiotics in the urban surface water of the Buriganga River, Bangladesh.","authors":"Umma Salma, Yuri Nishimura, Masahiro Tokumura, Anwar Hossain, Kozo Watanabe, Kazushi Noro, Mohammad Raknuzzaman, Takashi Amagai, Masakazu Makino","doi":"10.1016/j.chemosphere.2024.143956","DOIUrl":"10.1016/j.chemosphere.2024.143956","url":null,"abstract":"<p><p>Owing to the extensive use of antibiotics in hospitals, animal husbandry, and various human activities, antibiotic contamination is becoming an increasing global concern, including in Bangladesh. In Bangladesh, the Buriganga River is heavily polluted with multiple antibiotics, which can lead to antibiotic resistance in bacteria. In this study, we performed the first investigation of seasonal variations in the occurrence and spatial distribution of 29 antibiotics in the Buriganga River, Bangladesh, from wet season (August 2019) and dry season (February 2020). We also evaluate the potential environmental and resistance risks related to antibiotic contamination. The concentrations of metronidazole (9.1-970 ng L^-1), sulfadiazine (below the limit of detection (<LOD)-790 ng L^-1), and levofloxacin (<LOD-710 ng L^-1) were the highest, and metronidazole, amoxicillin, and doxycycline were detected in all samples during both seasons. The number of antibiotics detected, and their overall concentrations were higher during the dry season (February) than during the wet season (August). Ecological risk assessment using risk quotients (RQs) indicated that levofloxacin (maximum RQ = 90), amoxicillin (58), and ciprofloxacin (21) could pose a high risk to aquatic organisms, whereas sulfamethazine, trimethoprim, doxycycline, and lincomycin pose a medium risk. The levels of seven antibiotics, trimethoprim, ciprofloxacin, levofloxacin, amoxicillin, ampicillin, cefotaxime, and metronidazole exceeded the antibiotic resistance thresholds. In conclusion, this study highlights the urgent need for further research with improved wastewater management practices and implement stricter regulations on antibiotic use to protect aquatic ecosystems and public health in Bangladesh.</p>","PeriodicalId":93933,"journal":{"name":"Chemosphere","volume":" ","pages":"143956"},"PeriodicalIF":0.0,"publicationDate":"2024-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142831126","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}

{"title":"Intensifying intermittent aeration for optimizing nutrient and hormone removal in vertical-flow constructed wetlands filled with aerated concrete.","authors":"Mayra Alves Donato, Adelania de Oliveira Souza, Amanda Pacheco, Lucas de Carvalho Silva, Silvana Svenar, André Nagalli, Fernando Hermes Passig, Jossy Karla Brasil Bernardelli, Karina Querne de Carvalho","doi":"10.1016/j.chemosphere.2024.143941","DOIUrl":"10.1016/j.chemosphere.2024.143941","url":null,"abstract":"<p><p>Operational strategies have been applied in constructed wetlands to optimize the removal of nutrients and hormones that are still a concern in wastewater treatment. The strategy of intensifying intermittent aeration was investigated in two microcosm-scale vertical-flow constructed wetlands (VFCWs) planted with Eichhornia crassipes onto autoclaved aerated concrete (AC) in the removal of nutrients, estrone (E1), 17β-estradiol (E2) and 17α-ethinylestradiol (EE2). CW-1 (2.4 LO₂ min^-1) and CW-2 (1.4 LO₂ min^-1) were fed with synthetic wastewater in sequencing-batch mode (cycles 48-48-72 h) and intermittently aerated for 1 h, followed by 7 h without aeration for 377 days. Combined with the intensification strategy, the use of planted free-floating macrophytes and concrete-based material (emergent) as filtering media stand out as the innovation and originality aspects of this study. Despite the hormone addition, intensifying aeration enhanced the efficiencies since CW-1 achieved the highest removals with 91% COD, 77% TN, 74% TAN, 60% nitrate, and 97% TP in Stage I (no hormone addition) and 90% COD, 80% TN, 93% TAN, 63% nitrate, and 82% TP in Stage II (with hormone addition). CW-1 achieved the highest removal efficiencies of E1 (84%), E2 (95%), and EE2 (73%). Conversely, the efficiencies decreased under the lower aeration rate (in CW-2) for all parameters. Macrophyte uptake and adsorption stood out for TN (>60.25%) and TP (>27.6%) removal as the main mechanisms in the VFCWs. The characteristics of AC favored ion exchange and precipitation, reinforcing the potential of this material as filtering media in VFCWs. Intensification of intermittent aeration combined with hormone addition diverse and riched the microbial community with the presence of Thauera, Lentimicrobium (denitrification), Candidatus Accumulibacter (phosphorus removal), Pseudomonas, Fusibacter, and Azoarcus (EE2 degradation). Intensifying intermittent aeration was an important strategy to enhance the simultaneous removal of nutrients and hormones in the VFCWs under the evaluated operational conditions.</p>","PeriodicalId":93933,"journal":{"name":"Chemosphere","volume":" ","pages":"143941"},"PeriodicalIF":0.0,"publicationDate":"2024-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142840545","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}

{"title":"Effects of energetic compounds on soil microbial communities and functional genes at a typical ammunition demolition site.","authors":"Yongbing Zhu, Sanping Zhao, Shuo Qi, Huijun Zhang, Xinru Zhang, Shangyi Li, Xiaohui Wang, Jing Gu, Tingting Zhang, Hailing Xi, Xiaodong Liu","doi":"10.1016/j.chemosphere.2024.143913","DOIUrl":"10.1016/j.chemosphere.2024.143913","url":null,"abstract":"<p><p>High concentrations of energetic compounds such as 2,4,6-trinitrotoluene (TNT), hexahydro-1,3,5-trinitro-1,3,5-triazine (RDX), and octahydro-1,3,5,7-tetranitro-1,3,5,7-tetrazocine (HMX) in military-contaminated sites pose a serious threat to human health and ecosystems. Better understanding about their effects on microbial diversity and functional genes in soil of ammunition demolition sites is required. In this study, the information of soil microbial community composition was obtained by metagenomic sequencing, and the impacts of energetic compounds on microbial community structure at the level of functional genes and enzymes based on Nr (Non-Redundant Protein Sequence Database), KEGG (Kyoto Encyclopedia of Genes and Genomes), CAZy (Carbohydrate-Active enZymes Database) and other databases were discussed. The results showed that soil microbial diversity and functional gene abundance decreased significantly with the increase of the concentrations of energetic compounds. Conversely, the relative abundance of Proteobacteria increased significantly, reaching over 80% in the heavily TNT-contaminated area near explosive-wastewater pool. Furthermore, functional gene analysis indicated that Proteobacteria had an advantage in degrading energetic compounds, and thus had the potential to improve the soil quality at ammunition demolition sites. This study provides a scientific basis for the future remediation and management of contaminated soils at ammunition demolition sites, as well as for the selection of efficient degraders of energetic compounds.</p>","PeriodicalId":93933,"journal":{"name":"Chemosphere","volume":" ","pages":"143913"},"PeriodicalIF":0.0,"publicationDate":"2024-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142796651","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}

{"title":"Enhanced extraction of Methylene Blue by Dodecyl-methyl Imidazolium Dodecyl sulfate GUMBOS - Magnetic Alginate Beads.","authors":"Taiwo Bakare-Abidola, William J A Russell, Kyle Jorgensen, Rocío L Pérez","doi":"10.1016/j.chemosphere.2024.143991","DOIUrl":"https://doi.org/10.1016/j.chemosphere.2024.143991","url":null,"abstract":"<p><p>In this study, dodecyl-methyl imidazolium dodecyl sulfonate ([C₁₂MIm][DS]) GUMBOS were synthesized and incorporated into alginate with γ-Fe₂O₃ to fabricate magnetic adsorbent beads ([C₁₂MIm][DS]-beads) for methylene blue (MB) removal. Characterization via ESI-MS, FT-IR, SEM, BET, and TGA confirmed their structure and properties. The beads achieved a maximum adsorption capacity of 4.5 mg/g at pH 10 with an initial MB concentration of 500 mg/L, following pseudo-first-order kinetics and the Langmuir isotherm model. Thermodynamic studies confirmed the process was exothermic. Even after six recycling cycles, the beads retained similar morphology and an MB removal percentage of 57.6%. The beads demonstrated high adsorption efficiency (70%) in the presence of Cu²⁺, ibuprofen, and malachite green, comparable to MB removal alone. These results highlight the potential of [C₁₂MIm][DS]-beads as effective adsorbents for water remediation applications.</p>","PeriodicalId":93933,"journal":{"name":"Chemosphere","volume":" ","pages":"143991"},"PeriodicalIF":0.0,"publicationDate":"2024-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142866737","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}

{"title":"Association between volatile organic compounds and circadian syndrome among pre- and postmenopausal women: A population-based study.","authors":"Xiaoya Sun, Zhenao Zhang, Jingyi Ren, Huanting Pei, Jie Liu, Bowen Yin, Chongyue Zhang, Rui Wen, Simeng Qiao, Ziyi Wang, Yuxia Ma","doi":"10.1016/j.chemosphere.2024.143975","DOIUrl":"https://doi.org/10.1016/j.chemosphere.2024.143975","url":null,"abstract":"<p><p>Air pollution is closely associated with the development of multiple metabolic diseases. Circadian syndrome (CircS), as an extended concept of metabolic syndrome (MetS), has been proven to be a better predictor of metabolic diseases than MetS. However, the relationship between volatile organic compounds (VOCs) and CircS in pre- and postmenopausal remains unclear. This study used data from the National Health and Nutrition Examination Survey (NHANES) 2011-2020, including 520 premenopausal women and 531 postmenopausal women. Generalized linear model (GLM), restricted cubic splines (RCS) model, subgroup analyses, and weighted quantile sum (WQS) model was used to assess the relationship between VOCs and CircS. In addition, sensitivity analyses were performed to evaluate the robustness of the results. Our findings showed that seven VOC metabolites were positively associated with the risk of CircS in postmenopausal women. In premenopausal women, only two VOC metabolites were positively associated with the risk of CircS. The WQS analysis further confirmed that VOC mixtures selected by least absolute shrinkage and selection operator (LASSO) were significantly associated with an increased risk of CircS in postmenopausal women, with HPMMA identified as the primary contributor to the combined effect. This association was not evident in premenopausal women. Meanwhile, in postmenopausal women, individual urinary VOC metabolites and VOC mixtures were observed to be positively associated with elevated glucose and short sleep. Our results highlighted that VOCs exposure was strongly associated with the occurrence of CircS in postmenopausal women. Further research is needed to confirm this conclusion.</p>","PeriodicalId":93933,"journal":{"name":"Chemosphere","volume":" ","pages":"143975"},"PeriodicalIF":0.0,"publicationDate":"2024-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142866705","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}

{"title":"Retraction notice to \"A fuzzy cognitive map approach to predict the hazardous effects of malathion to environment (air, water and soil)\" [Chemosphere 263 (2021) 127926].","authors":"S Poomagal, R Sujatha, P Senthil Kumar, Dai-Viet N Vo","doi":"10.1016/j.chemosphere.2024.143833","DOIUrl":"https://doi.org/10.1016/j.chemosphere.2024.143833","url":null,"abstract":"","PeriodicalId":93933,"journal":{"name":"Chemosphere","volume":" ","pages":"143833"},"PeriodicalIF":0.0,"publicationDate":"2024-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142848648","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}

{"title":"Mitigation of aluminum toxicity in rice seedlings using biofabricated selenium nanoparticles and nitric oxide: Synergistic effects on oxidative stress tolerance and sulfur metabolism.","authors":"Abir Das, Sayan Pal, Mirza Hasanuzzaman, Malay Kumar Adak, Sudipta Kumar Sil","doi":"10.1016/j.chemosphere.2024.143940","DOIUrl":"10.1016/j.chemosphere.2024.143940","url":null,"abstract":"<p><p>Biofabricated selenium nanoparticles (Se-NPs) and sodium nitroprusside-derived nitric oxide (NO) singly or in combination was evaluated to improve tolerance to aluminum (Al) stress in rice (Oryza sativa L. cv. Swarna Sub1). The major objective was to elucidate contribution of sulfur reduction processes in oxidative stress tolerance along with cellular responses. Rice seedlings were primed against Al stress (550 μM) by the exogenous application of 100 μM NO and 20 ppm Se-NPs synthesized from a Salvinia molesta D. Mitch. extract. Green-synthesized Se-NPs (∼67 nm) had a crystalline, amorphous structure, high stability with functional groups in capping agents. The seedlings reduced bioaccumulation of Al in root tissues under SNP, Se-NPs, and in combination. Bioexclusion of Al was done in endodermal tissues by callose formation and binding in a fluorescent complex in the root tips. An upregulation of sulfur metabolism, including total sulfur, cysteine, cysteine synthase, and ATP sulfurylase activity was modulated by SNP + Se-NPs combination. Oxidative stress inducing metal stress for membrane oxidation into malondialdehyde, superoxide radical, and hydrogen peroxide, were also moderated by the SNP + Se-NPs combination. The Al-induced oxidative stress was relieved by a proportionate increase in superoxide dismutase and peroxidase activity. A higher ratio of ascorbate to dehydroascorbate and reduced to oxidized glutathione induced by the SNP + Se-NPs combination was supported antioxidation. These findings may substantiate the efficiency of green-synthesized Se-NPs together with SNP (as an NO donor) for amelioration of Al hazardous in crops like rice.</p>","PeriodicalId":93933,"journal":{"name":"Chemosphere","volume":" ","pages":"143940"},"PeriodicalIF":0.0,"publicationDate":"2024-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142824549","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}

{"title":"Retraction notice to \"Pyrolysis: An effective technique for degradation of COVID-19 medical wastes\" [Chemosphere 275 (2021) 130092].","authors":"Selvakumar Dharmaraj, Veeramuthu Ashokkumar, Rajesh Pandiyan, Heli Siti Halimatul Munawaroh, Kit Wayne Chew, Wei-Hsin Chen, Chawalit Ngamcharussrivichai","doi":"10.1016/j.chemosphere.2024.143824","DOIUrl":"https://doi.org/10.1016/j.chemosphere.2024.143824","url":null,"abstract":"","PeriodicalId":93933,"journal":{"name":"Chemosphere","volume":" ","pages":"143824"},"PeriodicalIF":0.0,"publicationDate":"2024-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142848650","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}

{"title":"Assessing PFAS in Drinking Water: Insights from the Czech Republic's Risk-Based Monitoring Approach.","authors":"Frantisek Kozisek, Darina Dvorakova, Filip Kotal, Hana Jeligova, Lenka Mayerova, Veronika Svobodova, Martina Jurikova, Veronika Gomersall, Jana Pulkrabova","doi":"10.1016/j.chemosphere.2024.143969","DOIUrl":"https://doi.org/10.1016/j.chemosphere.2024.143969","url":null,"abstract":"<p><p>This study investigates the presence of perfluoroalkyl substances (PFAS) in the drinking water supplies in the Czech Republic using a risk-based monitoring approach. Tap water samples (n=27) from sources close to areas potentially contaminated with PFAS were analysed. A total of 28 PFAS were measured using ultra-performance liquid chromatography with tandem mass spectrometry after solid phase extraction. Total PFAS concentrations (∑PFAS) varied from undetectable to 90.8 ng/L, with perfluoropentanoic acid (PFPeA), perfluorohexanoic acid (PFHxA), perfluoroheptanoic acid (PFHpA) and perfluorobutane sulfonic acid (PFBS) being the most abundant, detected in over 70% of samples. Risk-based monitoring in drinking water showed that commercial wells had higher PFAS levels compared to tap water, particularly C4-C9 perfluorocarboxylic acids (PFCAs), possibly due to proximity to industrial areas. However, the hypothesis that risk-based monitoring is more effective than random monitoring was not confirmed, possibly because specific sources did not produce the target PFAS or because of the wide range and less obvious sources of potential contamination. The study also assessed exposure risks and compliance with regulatory thresholds. Weekly intake estimates for adults and children indicated that regular consumption of most contaminated water sample would exceed the tolerable weekly intake. Compared to EU regulations, none of the tap water samples exceeded the 'Sum of PFAS' parametric value of 100 ng/L, though one sample approached this limit. In addition, surface water samples from the Jizera River (n=21) showed a wider range of PFAS, with C7-C10 PFCAs, PFBS, and perfluorooctane sulfonic acid (PFOS) in every sample, with higher PFOS concentrations at a median of 2.56 ng/L. ∑PFAS concentrations increased downstream, rising from 1.08 ng/L near the spring to 26 ng/L downstream. This comprehensive analysis highlights the need for detailed/areal monitoring to also address hidden or non-obvious sources of PFAS contamination.</p>","PeriodicalId":93933,"journal":{"name":"Chemosphere","volume":" ","pages":"143969"},"PeriodicalIF":0.0,"publicationDate":"2024-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142857298","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}