Chemosphere最新文献

{"title":"Enhancement of atmospheric nucleation precursors on formic sulfuric anhydride induced nucleation: Theoretical mechanism","authors":"Guo-Ce An","doi":"10.1016/j.chemosphere.2024.143684","DOIUrl":"10.1016/j.chemosphere.2024.143684","url":null,"abstract":"<div><div>As an intermediate formed by H₂SO₄ (SA), formic sulfate anhydride (FSA) has been hypothesized to play a role in the nucleation of atmospheric aerosols. It is the first time that the clusters (SA)_<em>x</em>(A)_<em>y</em>(W)_<em>n</em> and (FSA)_<em>x</em>(A)_<em>y</em>(W)_<em>n</em> (<em>x</em> = 1–2; <em>y</em> = 1–2; <em>n</em> = 0–4) were systematically studied in theory on the structures, thermodynamics, intermolecular interactions, humidity dependence, atmospheric dependence and optical properties. FSA is predicted to be more stronger to promote the clustering with ammonia (A) than SA, suggesting that substituent group enhances nucleation capability of FSA. Whereas, the substituent group does not influence the humidity sensitivity of hydrated clusters. The clusters trend to form small hydrated clusters (<em>n</em>_water≦3). The study on atmospheric dependence indicates that the stability of the clusters depends more on temperature other than pressure. Moreover, FSA shows a stronger ability on reducing atmospheric visibility than A, SA and water molecules. This finding aims to draw attention to FSA about atmospheric nucleation.</div></div>","PeriodicalId":276,"journal":{"name":"Chemosphere","volume":"368 ","pages":"Article 143684"},"PeriodicalIF":8.1,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142592427","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}

{"title":"Assessing the long-term adverse effects of aluminium nanoparticles on freshwater phytoplankton using isolated-species and microalgal communities","authors":"A.A. Cortés-Téllez ,&nbsp;A. D'ors ,&nbsp;A. Sánchez-Fortún ,&nbsp;C. Fajardo ,&nbsp;G. Mengs ,&nbsp;M. Nande ,&nbsp;C. Martín ,&nbsp;G. Costa ,&nbsp;M. Martín ,&nbsp;M.C. Bartolomé ,&nbsp;S. Sánchez-Fortún","doi":"10.1016/j.chemosphere.2024.143747","DOIUrl":"10.1016/j.chemosphere.2024.143747","url":null,"abstract":"<div><div>The physicochemical properties of aluminum oxide nanoparticles (Al₂O₃-NPs or AlNPs) allow them to remain suspended in water for extended periods. Despite this, AlNPs are one of the least studied types of metal nanoparticles and pose a significant risk to aquatic ecosystems. Therefore, it is essential to understand the toxic mechanisms of AlNPs on microalgae and cyanobacteria, as they can have adverse effects on the entire aquatic food web. Our research aimed to assess the toxicity of continuous exposure to low environmentally relevant concentrations of AlNPs on the growth rate, photosynthetic activity, oxidative stress (ROS), and microcystin production (MC-LR) in a phytoplanktonic community (PCC) consisting of <em>Scenedesmus armatus</em> and <em>Microcystis aeruginosa</em>. Both single and community cultures were exposed to 1.0 μg mL-1 AlNPs for 28 days. The results showed a significant 20–40% inhibition of <em>S. armatus</em> population growth in both individual and community cultures after 28 days of exposure. In contrast, <em>M. aeruginosa</em> exhibited increased survival and cell division rates when exposed to nanoparticles, both individually and within the community. Additionally, <em>S. armatus</em> showed a substantial reduction in gross photosynthesis (Pg) and net photosynthesis (Pn), with less inhibition in respiration (R) after 28 days of exposure. Conversely, <em>M. aeruginosa</em> demonstrated higher rates of photosynthetic productivity in all three parameters (Pg, Pn, and R). In the PCC, respiration was inhibited from 14 to 28 days, and both Pg and Pn were also inhibited. Both <em>S. armatus</em> and <em>M. aeruginosa</em> showed 28–31% levels of ROS generation, while the phytoplanktonic community exhibited no significant ROS production. Moreover, the production and release of MC-LR decreased by 8–38% in <em>M. aeruginosa</em> compared to the control strain. These findings underscore the importance of monitoring the use and application of nanomaterials to mitigate their potential toxic effects on aquatic ecosystems.</div></div>","PeriodicalId":276,"journal":{"name":"Chemosphere","volume":"368 ","pages":"Article 143747"},"PeriodicalIF":8.1,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142640475","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Heavy metal bioaccumulation based on seasonal monsoon impact in benthic macroinvertebrates of Korean streams","authors":"Cheol Hong ,&nbsp;Thodhal Yoganandham Suman ,&nbsp;Chang Woo Ji ,&nbsp;Dong-soo Kong ,&nbsp;Ihn-Sil Kwak","doi":"10.1016/j.chemosphere.2024.143749","DOIUrl":"10.1016/j.chemosphere.2024.143749","url":null,"abstract":"<div><div>This study investigates the influence of seasonal monsoon flooding on heavy metal contamination and bioaccumulation in benthic macroinvertebrate communities within a stream ecosystem. We analyzed sediment and benthic macroinvertebrate samples for eight heavy metals [zinc (Zn), chromium (Cr), nickel (Ni), lead (Pb), copper (Cu), arsenic (As), cadmium (Cd), and mercury (Hg)]) before (BF) and after (AF) a major flooding event. We found significant spatial and temporal variations in heavy metal concentrations were observed, with higher levels after the flood. Chironomidae showed high bioaccumulation factors (BAFs) for several metals, highlighting their role as bioindicators. Notably, elevated Cu accumulation was observed in multiple species, including <em>Radix auricularia</em> (<em>R. auricularia</em>), <em>Cipangopaludina chinensis malleata</em> (<em>C. c. malleata</em>), and <em>Palaemon</em> spp. Non-metric multidimensional scaling (NMDS) analysis revealed shifting correlations between environmental variables and bioaccumulation patterns before and after flooding. Pre-flood, total nitrogen (TN) showed a strong positive correlation with Hg bioaccumulation, while post-flood, large sand content emerged as a more influential factor for Zn, Cr, Ni, and Pb bioaccumulation. Our findings emphasize the complex interplay between seasonal flooding, environmental factors, and heavy metal dynamics, with potential implications for ecological risk assessment and water quality management.</div></div>","PeriodicalId":276,"journal":{"name":"Chemosphere","volume":"368 ","pages":"Article 143749"},"PeriodicalIF":8.1,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142640485","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}

{"title":"Pt position determining efficiency and stability for photocatalytic toluene degradation over Pt decorated TiO2","authors":"Liuhan Guo ,&nbsp;Hehua Liao ,&nbsp;Zhaoliang Wang ,&nbsp;Shitong Han ,&nbsp;Dongmiao Li ,&nbsp;Bing Wang ,&nbsp;Jinni Shen ,&nbsp;Wenxin Dai ,&nbsp;Hailing Xu ,&nbsp;Xuxu Wang ,&nbsp;Zizhong Zhang","doi":"10.1016/j.chemosphere.2024.143773","DOIUrl":"10.1016/j.chemosphere.2024.143773","url":null,"abstract":"<div><div>Highly durable photocatalytic degradation of gas toluene pollutants is a great challenge due to the easy deactivation of photocatalysts. Herein, we synthesized the Pt embedded at interface of TiO₂ nanocomposites (TiO₂/Pt/TiO₂) and Pt exposed on the surface of TiO₂ nanocomposites (Pt/TiO₂/TiO₂) to investigate the effect of Pt position on the photocatalytic performance of toluene degradation. It was found that the Pt-exposed samples showed inactivation as the reaction progressed because carbonaceous intermediates such as phenol and benzoic acid were observed to be deposited on the exposed Pt to restrain the role of Pt in electron transfer for the production of reactive oxygen species. Whereas, Pt-embedded nanocomposites had excellent activity and stability for toluene degradation and CO₂ production more than 60 h. This was attributed to the protective effect of the TiO₂ outerlayer. The embedded Pt was not easily poisoned by the degradation intermediates, resulting in a good electron transfer and the continuous production of reactive oxygen species for photocatalytic reaction. Therefore, this work provides an efficient approach for designing of the stability of metal-decorated photocatalyst for the highly durable photocatalytic performance.</div></div>","PeriodicalId":276,"journal":{"name":"Chemosphere","volume":"368 ","pages":"Article 143773"},"PeriodicalIF":8.1,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142683377","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}

{"title":"Combining citrus waste-derived function microbes with biochar promotes humus formation by enhancing lignocellulose degradation in citrus waste compost","authors":"Jinye Li ,&nbsp;Songwei Wu ,&nbsp;Jixiang Zheng ,&nbsp;Xuecheng Sun ,&nbsp;Chengxiao Hu","doi":"10.1016/j.chemosphere.2024.143754","DOIUrl":"10.1016/j.chemosphere.2024.143754","url":null,"abstract":"<div><div>The low degradation rate of lignocellulose limits the humification process of citrus organic waste composting. This study explored the roles of general microbial inoculation (GM), citrus waste-derived function microbial inoculation (CM), and CM combined with biochar (CMB) in citrus waste compost. Results showed microbial inoculations all promoted lignocellulose degradation and humus formation, but the roles of CM and CMB were better than GM, especially CMB. Compared to the control, CMB raised the temperature and duration of thermophilic phase by 2.8 °C and 4 days, and improved lignin degradation rate and humus content by 21.5% and 7.6%. Furthermore, CMB promoted bacterial community succession and cooperation, and decreased network complexity. Moreover, CMB strengthened the correlation between mainly bacterial communities and polysaccharides, reducing sugars as well as carbohydrates metabolic, enhancing the contribution of bacteria such as <em>Bacillus</em>, <em>Flavobacterium</em> and <em>Staphylococcus</em> to humus and its precursors. It concludes that the naturally derived microbes in compost had better effects on promoting humus synthesis than exogenous microbes, which provides a new route for rapid humification of high-lignin organic waste in composting.</div></div>","PeriodicalId":276,"journal":{"name":"Chemosphere","volume":"368 ","pages":"Article 143754"},"PeriodicalIF":8.1,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142645338","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}

{"title":"Mutational landscape induced by chronic exposure to environmental PM10 and PM2.5 in A549 lung epithelial cell","authors":"Ericka Marel Quezada-Maldonado ,&nbsp;Dennis Cerrato-Izaguirre ,&nbsp;Rocío Morales-Bárcenas ,&nbsp;Yanueh Bautista-Ocampo ,&nbsp;Miguel Santibáñez-Andrade ,&nbsp;Raúl Quintana-Belmares ,&nbsp;Yolanda I. Chirino ,&nbsp;Patricia Basurto-Lozada ,&nbsp;Carla Daniela Robles-Espinoza ,&nbsp;Yesennia Sánchez-Pérez ,&nbsp;Claudia M. García-Cuellar","doi":"10.1016/j.chemosphere.2024.143766","DOIUrl":"10.1016/j.chemosphere.2024.143766","url":null,"abstract":"<div><div>Exposure to particulate matter (PM) has been linked to an increased risk of multiple diseases, primarily lung cancer, through various molecular mechanisms. However, the mutagenic potential of PM remains unclear. This study aimed to provide a comprehensive description of genetic mutations and mutagenic signatures resulting from chronic exposure to PM₁₀ or PM_2.5. Using whole exome sequencing, we identified driver mutations and mutational signatures in A549 cells, a lung epithelial cell model subjected to weekly exposure to either PM₁₀ or PM_2.5, for a period of 28 weeks. The number of single nucleotide variations, insertions, and deletions increased depending on the duration of exposure. PM₁₀ generated the highest number of genomic alterations. Amplifications in <em>SYK</em> (oncogene) and mutations in <em>NCOR1</em> (tumor suppressor gene) were prevalent in cells exposed to either PM₁₀ or PM_2.5; however, other mutations were exclusive, such as <em>TP53</em> and <em>ANK3</em> for PM₁₀, and <em>ERCC1</em> and <em>ERCC2</em> for PM_2.5. Different p53-related signaling pathways were most enriched by driver mutations upon exposure to both PM₁₀ and PM_2.5, particularly the glucose deprivation pathway. Exposure to either PM₁₀ or PM_2.5 resulted in high frequencies of C &gt; A substitutions and one-base insertions/deletions in microhomology sites. The single-base substitution (SBS) signature SBS05, related to the nucleotide excision DNA repair pathway, contributed the most to both PM₁₀-and PM_2.5-exposed cells. The contribution of signature SBS18, related to oxidative stress, was observed in cells exposed to either PM₁₀ or PM_2.5, but a greater contribution was observed in PM_2.5-exposed cells. In addition, SBS03 and SBS36, which are related to different DNA damage repair mechanisms, were observed more frequently in PM₁₀-exposed cells. We assessed the mutagenic potential of PM₁₀ and PM_2.5, as a complete mixture, identifying mutated driver genes and mutational signatures generated by chronic PM exposure, which could contribute to the development of cancer, cardiovascular, and digestive diseases.</div></div>","PeriodicalId":276,"journal":{"name":"Chemosphere","volume":"368 ","pages":"Article 143766"},"PeriodicalIF":8.1,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142649846","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}

{"title":"Novelties on tradescantia: Perspectives on water quality monitoring","authors":"Edimar Olegário de Campos Júnior,&nbsp;José Marcello Salabert de Campos,&nbsp;Roberto Júnio Pedroso Dias,&nbsp;Nathan Oliveira Barros","doi":"10.1016/j.chemosphere.2024.143732","DOIUrl":"10.1016/j.chemosphere.2024.143732","url":null,"abstract":"<div><div>In the face of intense urban expansion, the assessment of water quality plays a crucial role in environmental preservation. Here, we evaluated aquatic genotoxicity in three locations with different degrees of urbanization using <em>Tradescantia pallida</em> var. purpurea and <em>Daphnia magna</em> as bioindicators. The objective was to investigate the influence of urbanization on water quality and the efficiency of the TRAD-MCN biological test in monitoring aquatic genotoxicity. Therefore, we established the genotoxic potential by evaluating micronucleus frequency in <em>T. pallida</em> and immobilization and DNA damage in the standard test with <em>D. magna</em> during two seasons of the year (dry and rainy). Our results showed that the frequency of micronuclei in <em>T. pallida</em> (TRAD-MCN) was significantly higher in the locations with a higher degree of urbanization, independently of the seasons. The tests with <em>D. magna</em> revealed a higher rate of immobilization and DNA damage in the location most impacted by residential and industrial effluents (especially mining activities). Additionally, the TRAD-MCN proved to be equivalent to the standard test for genotoxicity assessment, supporting its potential applicability in environmental monitoring. Finally, we observed that urbanization significantly influences water quality, and among the evaluated physicochemical parameters, dissolved oxygen was shown to be the most important driver of the water quality index (WQI). Our findings have significant implications for water resource management, underlining the need for policies that consider the specificities of different regions. This highlights the robustness, flexibility, and reliability of <em>T. pallida</em> as an environmental monitoring tool.</div></div>","PeriodicalId":276,"journal":{"name":"Chemosphere","volume":"368 ","pages":"Article 143732"},"PeriodicalIF":8.1,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142683241","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}

{"title":"Characterization of AhR-mediated potency in sediments from Kongsfjorden, Svalbard: Application of effect-directed analysis and nontarget screening","authors":"Jiyun Gwak ,&nbsp;Jihyun Cha ,&nbsp;Seung-Il Nam ,&nbsp;Jung-Hyun Kim ,&nbsp;Junghyun Lee ,&nbsp;Hyo-Bang Moon ,&nbsp;Jong Seong Khim ,&nbsp;Seongjin Hong","doi":"10.1016/j.chemosphere.2024.143771","DOIUrl":"10.1016/j.chemosphere.2024.143771","url":null,"abstract":"<div><div>In this study, we aimed to identify the major aryl hydrocarbon receptor (AhR) agonists in surface sediments (S1–S10, n = 10) from Kongsfjorden, Arctic Svalbard, using effect-directed analysis. High AhR-mediated potencies were observed in the mid-polar fractions and RP-HPLC subfractions (F2.6–F2.8; log K_OW 5–8) in the sediments of sites S2 and S3, which are located near abandoned coal mine areas, as assessed by the H4IIE-<em>luc</em> bioassay. The concentrations of traditional polycyclic aromatic hydrocarbon (t-PAHs), emerging PAHs, alkyl-PAHs, and styrene oligomers ranged from 6.1 to 2100 ng g⁻¹ dry weight (dw), 0.5–1000 ng g⁻¹ dw, 47 to 79,000 ng g⁻¹ dw, and 4.2–130 ng g⁻¹ dw, respectively, with elevated levels in S2 and S3. Principal component analysis coupled with multiple linear regression suggested that t-PAHs in sediments primarily originated from coal, petroleum combustion, and coal combustion. Twenty-four target AhR agonists accounted for 3.2%–100% (mean = 47%) of the total AhR-mediated potencies in S2 and S3. Nontarget screening via GC-QTOFMS in the highly potent fractions identified 48 AhR agonist candidates through four-step selection criteria. Among these, 27 compounds were identified as coal-derived substances. VirtualToxLab in silico modeling predicted that most of the 48 tentative AhR agonist candidates could bind to AhR. Overall, our findings indicate significant contamination of the Kongsfjorden sediments by coal-derived substances, highlighting the need for further studies to assess the ecological risks associated with these contaminants.</div></div>","PeriodicalId":276,"journal":{"name":"Chemosphere","volume":"368 ","pages":"Article 143771"},"PeriodicalIF":8.1,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142683878","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}

{"title":"Carbon-mediated modulation pathways of phytotoxicity in chicken manure composting","authors":"Xia Gao ,&nbsp;Yilin Kong ,&nbsp;Jie Yin,&nbsp;Jiani Wang,&nbsp;Guoxue Li,&nbsp;Guoying Wang,&nbsp;Jing Yuan","doi":"10.1016/j.chemosphere.2024.143755","DOIUrl":"10.1016/j.chemosphere.2024.143755","url":null,"abstract":"<div><div>Compost phytotoxicity affects the safety of organic fertilizers returned to the field, thus hindering the breeding cycle, so it is essential to reduce the compost phytotoxicity. The phytotoxicity of compost was estimated utilizing the germination index (GI) and the aqueous substances (organics and ions) present in compost correlated closely with GI. This study assessed the effect of carbon additives from different plant sources (mushroom substrates (MS), cornstalks (CS) and garden substrates (GS)) on maturity parameters (temperature, pH, EC, C/N), content of aqueous carbon and nitrogen matters, salt ions, heavy metal ions, and microbiome of piles when composting with chicken manure and especially focused on their effect on GI. Results showed that all additives significantly improved GI (85.25%–106.28%). The primary factors influencing seed germination were Mg²⁺ and SO₄²⁻ in CM compost, acetic acid and NH₄⁺ in CM + MS compost, humic acid in CM + CS compost, and dissolved total nitrogen in CM + GS compost. During composting, the growth of heavy metal passivating bacteria (<em>Bacillus</em>) and organic matter degrading bacteria (<em>Desemzia</em> and <em>Turicibacter</em>) can be promoted by decreasing aqueous carbon and nitrogen substances (volatile fatty acids, NH₄⁺, dissolved total nitrogen, amino acids) and increasing the content of humic acid, which improved the composting environment and provided favorable conditions for the germination of seeds, thereby increasing GI. Therefore, GS showed the best potential for accelerating degradation of organic matter and improving GI during composting with chicken manure.</div></div>","PeriodicalId":276,"journal":{"name":"Chemosphere","volume":"368 ","pages":"Article 143755"},"PeriodicalIF":8.1,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142645337","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}

{"title":"Effects of incorporating biochar on soil quality and barley yield in microplastics-contaminated soils","authors":"Aya Debab ,&nbsp;Sonia Boudjabi ,&nbsp;Haroun Chenchouni ,&nbsp;Nawal Ababsa ,&nbsp;Amna Brahimi","doi":"10.1016/j.chemosphere.2024.143760","DOIUrl":"10.1016/j.chemosphere.2024.143760","url":null,"abstract":"<div><div>Biochar has been recognized for its potential to improve the fertility soils by reducing the reliance on chemical fertilizers, mitigating carbon emissions, and fostering soil microbial growth. This study aimed to evaluate the impact of biochar addition on the physicochemical properties of arid and semi-arid soils containing microplastics, while also assessing its effect on Barley (<em>Hordeum vulgare</em>) yield under drought stress. The experiment was conducted in a glass greenhouse. Plastic pots containing 3 kg of soil were each planted with 6 barley grains. Biochar was applied at three doses (B0 = 0 g biochar/kg soil, B1 = 6 g biochar/kg soil, B2 = 10 g biochar/kg soil), while microplastics were added at three levels (M0 = Control without microplastics, M1 = 0.5 g/kg soil, and M2 = 1 g/kg soil) on the same sowing date. Water stress was induced when the plants reached the four-leaf stage. ANOVAs and Tukey post-hoc tests were employed for multiple mean comparisons of soil and plant parameters. Drought stress and microplastics negatively influenced soil parameters namely soil moisture, organic carbon, and nitrates, while also affecting electrical conductivity and pH. Biochar exhibited minimal effect on soil properties but significantly altered pH, nitrates, and total CaCO₃. Plant chlorophyll levels decreased under stress, particularly with microplastic dose M1. However, biochar and microplastics enhanced chlorophyll <em>a</em> content, except for dose B1 of biochar, which leads to a decrease in chlorophyll <em>b</em> (0.91 ± 0.138 μg/g FM). Microplastics, at dose M2, improved chlorophyll <em>b</em> content (1.11 ± 0.090 μg/g FM). Aboveground biomass, leaf area, and yield were generally unaffected by tested stresses. Nonetheless, barley grain yield decreased in biochar and microplastic dose M1 (0.47 ± 0.108 g/plant), while it improved with microplastic dose M2 (0.65 ± 0.168 g/plant). Leaf relative water content increased under water stress and microplastics but not with biochar alone. Interaction between microplastics and biochar enhanced plant water content. Drought stress and microplastics diminished soil parameters, whereas biochar lowered nitrates and pH without significantly affecting soil organic carbon. Plant productivity parameters generally exhibited no significant change under water stress, microplastics, or biochar, except for yield and chlorophyll pigments.</div></div>","PeriodicalId":276,"journal":{"name":"Chemosphere","volume":"368 ","pages":"Article 143760"},"PeriodicalIF":8.1,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142649812","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}