Chemosphere最新文献_第9页

Emerging threats in Central Asia: Comparative characterization of organic and elemental carbon in ambient PM_2.5 in urban cities of Kazakhstan.

Chemosphere Pub Date : 2024-12-16 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 Central 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":"https://doi.org/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 (October-March) 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":"2024-12-16","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

NH₂-MIL-125(Ti)/TiO₂ heterojunction with non-disturbed dual reactive centers for synchronous photocatalytic removal of Cr(VI) and organic dyes. 具有无干扰双反应中心的 NH2-MIL-125(Ti)/TiO2 异质结可同步光催化去除六价铬和有机染料。

Chemosphere Pub Date : 2024-12-16 DOI: 10.1016/j.chemosphere.2024.143935

Ruifang Yan, Songsong Zhi, Mingming Hao, Yanlei Liu, Hongju Wang, Shilei Zhou, Kai Jiang, Dapeng Wu

{"title":"NH2-MIL-125(Ti)/TiO2 heterojunction with non-disturbed dual reactive centers for synchronous photocatalytic removal of Cr(VI) and organic dyes.","authors":"Ruifang Yan, Songsong Zhi, Mingming Hao, Yanlei Liu, Hongju Wang, Shilei Zhou, Kai Jiang, Dapeng Wu","doi":"10.1016/j.chemosphere.2024.143935","DOIUrl":"10.1016/j.chemosphere.2024.143935","url":null,"abstract":"Chromium (VI) (Cr(VI)) generally coexists with organic dyes in industrial effluents, posing a formidable challenge in water purification. Herein, NH2-MIL-125(Ti)/TiO2 Z-scheme heterojunction with intimate interfacial contact was synthesized for synchronous removal of pollutant in coexisting Cr(VI)/dyes system under simulated solar irradiation. Structural and optical investigations indicated that a well-defined interface was formed by establishing a Ti-N-C bond, facilitating the spatial separation of the photoexcited carriers of the Z-scheme heterojunction. The optimum NH2-MIL-125(Ti)/TiO2 nanocomposites show superior performance in photocatalytic removal of the pollutants in the Cr(VI) (5 mg/L, 97.2%)/MB (40 mg/L, 100%) coexistence systems within 120 min, which is comparable to that in the single system. The electron spin resonance (ESR) tests, radicals scavenging experiments, and density functional theory (DFT) cannulations unveiled that TiO2 could serve as oxidation centers to generate hydroxyl radicals (•OH) for MB oxidation, while the NH2-MIL-125(Ti) with exposed Ti nodes could act as reduction centers to effectively adsorb Cr2O72- and inject photo-generated electrons (e-) to accomplish the in-site photoreduction of Cr(VI) into Cr(III) under illumination. Particularly, owing to the spatial separation and non-disturbed dual reactive centers, the reduction and oxidation processes could be well accommodated, which could allow MB and Cr(VI) to be removed synchronously. This work demonstrated the great potential of applying duel reactive centers to eliminate multipollutant simultaneously in the actual scenarios for wastewater treatment.","PeriodicalId":93933,"journal":{"name":"Chemosphere","volume":" ","pages":"143935"},"PeriodicalIF":0.0,"publicationDate":"2024-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142819956","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

LPDE biodegradation promoted by a novel additive based on silica nanoparticles: Structural, microbial and ecotoxicological characterization.

Chemosphere Pub Date : 2024-12-16 DOI: 10.1016/j.chemosphere.2024.143943

Gabriela M Miranda, Andressa F Pivato, Flávia S de Fraga, Vinícius P Machado, Bruna P Lovato, Alini T Fricks, Eliane Santarém, Janira Prichula, Danielle S Trentin, Jeane E A de Lima, Rosane A Ligabue

{"title":"LPDE biodegradation promoted by a novel additive based on silica nanoparticles: Structural, microbial and ecotoxicological characterization.","authors":"Gabriela M Miranda, Andressa F Pivato, Flávia S de Fraga, Vinícius P Machado, Bruna P Lovato, Alini T Fricks, Eliane Santarém, Janira Prichula, Danielle S Trentin, Jeane E A de Lima, Rosane A Ligabue","doi":"10.1016/j.chemosphere.2024.143943","DOIUrl":"10.1016/j.chemosphere.2024.143943","url":null,"abstract":"This study developed a biodegrading additive based on nanosilica and modified by cellulase enzyme in the presence of citric acid and sodium citrate. The additive was tested as a facilitator for biodegradation of the commercial low-density polyethylene (LDPE) in soil. Enzyme immobilization was confirmed by enzymatic assays. Moreover, additive and nanocomposites were characterized by spectroscopic and microscopic techniques. To assess the role of additive in biodegradation, CO2 production in soil was measured at 30 °C for 83 days. Biodegraded nanocomposites were cultivated to isolate possible LDPE-biodegrading microorganisms. Ecotoxicity of the studied materials was evaluated on cucumber (Cucumis sativus L.). CO2 production from LDPE/additive sample was similar to the starch (1055 ± 14 mg and 1078 ± 28 mg, respectively), and higher than pure LDPE (882 ± 34 mg) and LDPE/nanosilica (992 ± 30 mg). Although the presence of LDPE/nanosilica and LDPE/additive led to root length reduction of 24.3 ± 2.3% compared to the control (soil), the accumulation of root biomass was not affected. Furthermore, the nanocomposites did not cause harmful effects on seedling growth. Nine microbial isolates were recovered from biodegraded samples and identified by molecular techniques. It was demonstrated for the first time the LDPE biodegradation potential by four bacterial isolates (Bacillus safensis FO-36b, Lysinibacillus capsici, Bacillus albus N35-10-2 and Bacillus paranthracis Mn5) and two fungal isolates (Cladosporium halotolerans clone EF_526 and Cladosporium sp. MV-2018B isolate MLT-27). Our study sheds light on the biodegradation of commercial LDPE by soil microorganisms using a novel LDPE-biodegrading additive nanocomposite.","PeriodicalId":93933,"journal":{"name":"Chemosphere","volume":" ","pages":"143943"},"PeriodicalIF":0.0,"publicationDate":"2024-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142831125","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 oxidation of 2,4-dichlorophenol in ferrate(VI) and copper oxide system via the formation of trivalent copper ion and singlet oxygen.

Chemosphere Pub Date : 2024-12-15 DOI: 10.1016/j.chemosphere.2024.143970

Guihai Zhang, Yidan Luo, Jiancheng Cheng, Xinlong Hua, Guizhou Xu, Mengqin Yu, Zhu Wang, Yalan Zhang, Wei Liu, Yingxin Du, Xianchuan Xie, Daishe Wu, Zugen Liu

{"title":"Enhanced oxidation of 2,4-dichlorophenol in ferrate(VI) and copper oxide system via the formation of trivalent copper ion and singlet oxygen.","authors":"Guihai Zhang, Yidan Luo, Jiancheng Cheng, Xinlong Hua, Guizhou Xu, Mengqin Yu, Zhu Wang, Yalan Zhang, Wei Liu, Yingxin Du, Xianchuan Xie, Daishe Wu, Zugen Liu","doi":"10.1016/j.chemosphere.2024.143970","DOIUrl":"https://doi.org/10.1016/j.chemosphere.2024.143970","url":null,"abstract":"Improving the activity of ferrate is one of the main research focus in environmental field. Here, we demonstrate a novel copper oxide (CuO)-Ferrate(VI) system wherein CuO plays a key role in activating Fe(VI) to effectively eliminate phenolic contaminants. The dominant reactive species were determined to be Cu(III) and 1O2, confirmed by in situ Raman spectroscopy, quenching experiments, and EPR tests. The results indicated that Fe(VI) preferentially reacts with CuO, forming Cu(III) and 1O2. Subsequently, deprotonated 2,4-dichlorophenol (2,4-DCP) was adsorbed with Cu(III) via electrostatic adsorption and was directly oxidized by Cu(III). Co-existing ion experiments demonstrated the strong stability of the CuO/Fe(VI) system against environmental background substances, maintaining effective removal efficiency over multiple cycles. In summary, this study highlights the potential advantages of CuO-assisted Fe(VI) activation, offering a new route for the efficient utilization of Fe(VI) in eliminating phenolic pollutants.","PeriodicalId":93933,"journal":{"name":"Chemosphere","volume":" ","pages":"143970"},"PeriodicalIF":0.0,"publicationDate":"2024-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142848691","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

Treatment of high concentration phenol wastewater by low-frequency ultrasonic cavitation and long-term pilot scale study.

Chemosphere Pub Date : 2024-12-15 DOI: 10.1016/j.chemosphere.2024.143937

Haohao Sun, Jie Li, Yunian Zhang, Lu Zhuang, Zhou Zhou, Yanfang Ren, Xia Xu, Junyu He, Yingang Xue

{"title":"Treatment of high concentration phenol wastewater by low-frequency ultrasonic cavitation and long-term pilot scale study.","authors":"Haohao Sun, Jie Li, Yunian Zhang, Lu Zhuang, Zhou Zhou, Yanfang Ren, Xia Xu, Junyu He, Yingang Xue","doi":"10.1016/j.chemosphere.2024.143937","DOIUrl":"10.1016/j.chemosphere.2024.143937","url":null,"abstract":"Acoustic cavitation is an advanced, eco-friendly oxidation technology effective in removing organic pollutants from water. However, research on its use for degrading phenol, a common and challenging phenolic pollutant, is limited. This study explores the optimal conditions for phenol degradation using acoustic cavitation and assesses its practical application through extensive pilot tests. Results from batch tests show that low-frequency (15 kHz) ultrasonic cavitation effectively treats high concentrations of phenol (1000 mg L-1). Aeration and acidic pH enhance removal efficiency, while alkaline conditions inhibit degradation. Analysis of total organic carbon (TOC), degradation products, and volatile organic compounds (VOCs) reveals that the primary intermediates are substituted benzenes and alkanes. Long-term pilot tests demonstrated the device's effectiveness in phenol removal and its operational stability over 180 days. The study also establishes a relationship between removal efficiency, hydraulic retention time (HRT), and operating costs, highlighting the feasibility of low-frequency ultrasonic cavitation for treating high-concentration phenolic wastewater and its potential role in the pretreatment stage of biochemical processes.","PeriodicalId":93933,"journal":{"name":"Chemosphere","volume":" ","pages":"143937"},"PeriodicalIF":0.0,"publicationDate":"2024-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142822668","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

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 : 2024-12-15 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":"https://doi.org/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":"2024-12-15","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

Recent advances and factors affecting the adsorption of nano/microplastics by magnetic biochar.

Chemosphere Pub Date : 2024-12-14 DOI: 10.1016/j.chemosphere.2024.143936

Khurram Shahzad, Areej Hasan, Syed Kumail Hussain Naqvi, Saima Parveen, Abrar Hussain, Kyong-Cheol Ko, Sang Hyun Park

{"title":"Recent advances and factors affecting the adsorption of nano/microplastics by magnetic biochar.","authors":"Khurram Shahzad, Areej Hasan, Syed Kumail Hussain Naqvi, Saima Parveen, Abrar Hussain, Kyong-Cheol Ko, Sang Hyun Park","doi":"10.1016/j.chemosphere.2024.143936","DOIUrl":"10.1016/j.chemosphere.2024.143936","url":null,"abstract":"The increase in nano/microplastics (NPs/MPs) from various everyday products entering aquatic environments highlights the urgent need to develop mitigation strategies. Biochar (BC), known for its excellent adsorption capabilities, can effectively target various harmful organic and inorganic pollutants. However, traditional methods involving powdered BC necessitate centrifugation and filtration, which can lead to the desorption of pollutants and subsequent secondary pollution. Magnetic biochar (MBC) offers a solution that facilitates straightforward and rapid separation from water through magnetic techniques. This review provides the latest insights into the progress made in MBC applications for the adsorption of NPs/MPs. This review further discusses how external factors such as pH, ionic strength, temperature, competing ions, dissolved organic matter, aging time, and particle size impact the MBC adsorption efficiency of MPs. The use of machine learning (ML) for optimizing the design and properties of BC materials is also briefly addressed. Finally, this review addresses existing challenges and future research directions aimed at improving the large-scale application of MBC for NPs/MPs removal.","PeriodicalId":93933,"journal":{"name":"Chemosphere","volume":" ","pages":"143936"},"PeriodicalIF":0.0,"publicationDate":"2024-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142820231","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 "Adsorptive removal of Pb(II) ions onto surface modified adsorbents derived from Cassia fistula seeds: Optimization and modelling study" [Chemosphere 283 (2021) 131276].

Chemosphere Pub Date : 2024-12-14 DOI: 10.1016/j.chemosphere.2024.143825

R V Hemavathy, A Saravanan, P Senthil Kumar, Dai-Viet N Vo, S Karishma, S Jeevanantham

引用次数: 0

Retraction notice to "Enhancement of lipid accumulation in microalga Desmodesmus sp. VV2: Response surface methodology and artificial neural network modeling for biodiesel production" [Chemosphere 293 (2022) 133477]. 关于 "Enhancement of lipid accumulation in microalga Desmodesmus sp：生物柴油生产的响应面方法和人工神经网络建模" [Chemosphere 293 (2022) 133477]。

Chemosphere Pub Date : 2024-12-14 DOI: 10.1016/j.chemosphere.2024.143837

Elamathi Vimali, Arumugasamy Senthil Kumar, Nagamalai Sakthi Vignesh, Balasubramaniem Ashokkumar, Amarajothi Dhakshinamoorthy, Aswathy Udayan, Muthu Arumugam, Arivalagan Pugazhendhi, Perumal Varalakshmi

引用次数: 0

Retraction notice to "Utilization of agricultural lignocellulosic wastes for biofuels and green diesel production" [Chemosphere 290(2022) 133246]. 关于 "利用农业木质纤维素废弃物生产生物燃料和绿色柴油 "的撤稿通知 [Chemosphere 290(2022) 133246]。

Chemosphere Pub Date : 2024-12-14 DOI: 10.1016/j.chemosphere.2024.143827

Chaitanya Kumar Reddy Pocha, Shir Reen Chia, Wen Yi Chia, Apurav Krishna Koyande, Saifuddin Nomanbhay, Kit Wayne Chew

引用次数: 0