环境科学与技术最新文献

{"title":"B-Modified Pd Cathodes for the Efficient Detoxification of Halogenated Antibiotics: Enhancing C-F Bond Breakage beyond Hydrodefluorination.","authors":"Zefang Chen, Lin Du, Victor Fung, Qingquan Ma, Xiaojun Wang, Shaohua Chen, John C Crittenden, Yongsheng Chen","doi":"10.1021/acs.est.4c12635","DOIUrl":"https://doi.org/10.1021/acs.est.4c12635","url":null,"abstract":"<p><p>Halogenated antibiotics pose a great threat to aqueous environments because of their persistent biotoxicity from carbon-halogen bonds. Electrochemical reduction (ER) is an efficient technology for dehalogenation, but it still suffers from limited efficiencies in breaking C-F bonds. Herein, we present a strategy to enhance C-F cleavage and promote detoxification by loading benchmark palladium cathodes onto boron-doped carbon. This improves the florfenicol (FLO) degradation rate constant and defluorination efficiency by 1.24 and 1.05 times, respectively, and improves the defluorination of various fluorinated compounds. The cathode with optimal B content shows superior mass activity for FLO degradation (1.11 mmol g^-1 Pd min^-1), which is 5.9 times that of commercial Pd/C and is among the best-reported cathodes. Notably, the exclusive formation of the direct defluorination product (i.e., FLO-F) on Pd/B-C implies a higher intrinsic C-F cleavage ability endowed by B doping. As revealed by experiments and theoretical calculations, boron modification enhances palladium binding and induces stronger strain effects and higher electron density for surface palladium atoms, which boosts H* generation and reduces the energy barrier for C-F cleavage. This study provides an effective cathode design strategy to enhance C-F activation, which may broadly benefit the destruction and detoxification of fluorinated organics that are limited by sluggish C-F cleavage kinetics.</p>","PeriodicalId":36,"journal":{"name":"环境科学与技术","volume":" ","pages":""},"PeriodicalIF":10.8,"publicationDate":"2025-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143595776","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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":"Microplastic-Induced Alterations in Soil Aggregate-Associated Carbon Stabilization Pathways: Evidence from δ13C Signature Analysis","authors":"Yanpei Li, Qing Yan, Chuningrui Zou, Xia Li, Jiao Wang, Ming’an Shao, Hanzhong Jia","doi":"10.1021/acs.est.4c09242","DOIUrl":"https://doi.org/10.1021/acs.est.4c09242","url":null,"abstract":"Microplastics (MPs) are known to affect soil carbon stability in a numerous ways. However, the mechanisms by which they alter the carbon stability within soil aggregates remain unclear . Herein, a one-year field experiment was conducted in an arid agricultural region employing stable isotope techniques to evaluate the soil organic carbon flow in the presence of both persistent (PE, PVC) and biodegradable (PLA, PHA) MPs. PE and PVC reduced the stability of soil aggregates, while PLA and PHA maintained it. Additionally, organic carbon content increased in microaggregates but decreased in small macroaggregates for PE and PVC treatments. By contrast, treatment with PLA and PHA enhanced organic carbon content across aggregates. The δ¹³C values of PE- and PVC-treated aggregates ranged from −25.34 to −20.85‰, while those of PLA and PHA ranged from −16.29 to −9.26‰. Notably, MPs altered the direction of carbon flow between aggregates, reduced carbon flux, and accelerated carbon emissions. RFP and PLS–PM analyses revealed that persistent MPs affected carbon flow primarily via abiotic factors, whereas biodegradable MPs influenced it via biotic factors. These findings provide insights into the mechanisms by which MPs impact aggregate-associated carbon, highlighting their effects on soil ecosystem services.","PeriodicalId":36,"journal":{"name":"环境科学与技术","volume":"21 1","pages":""},"PeriodicalIF":9.028,"publicationDate":"2025-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143600066","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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":"Decarbonizing the Non-Carbon: Benefit-Cost Analysis of Phasing Out the Most Potent GHG in Interconnected Power Grids.","authors":"Song Xiao, Yuting Yang, Yubei Li, Jingtong Lin, Yana Jin","doi":"10.1021/acs.est.4c10752","DOIUrl":"10.1021/acs.est.4c10752","url":null,"abstract":"<p><p>Sulfur hexafluoride (SF₆), the most potent greenhouse gas, is widely used in gas-insulated switchgear (GIS) in the power industry. With increasing electrification and deepening renewable penetration, GIS installations and SF₆ emissions are expected to rise. This work provides the first comprehensive analysis of the social economic viability of eliminating SF₆ in high-voltage GIS equipment. We develop a flexible and scalable benefit-cost analysis framework to assess the net social benefits of SF₆ replacement strategies. Using data from the Chinese power industry, we find that the social cost of carbon and firms' compliance with SF₆ standards are critical factors. Although high-level policies to eradicate SF₆ in GIS are generally beneficial, net benefits can vary significantly across local implementation realities. Nonetheless, investing in SF₆ alternatives is highly cost-effective in reducing greenhouse gas emissions compared with other green technologies like wind and solar power.</p>","PeriodicalId":36,"journal":{"name":"环境科学与技术","volume":" ","pages":"4255-4265"},"PeriodicalIF":10.8,"publicationDate":"2025-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143412276","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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":"Dominant Mechanism of Nanofiltration for Chloride/Sulfate Ion Separation in High Salinity Solutions: The Quantification of Pore Size-Influenced Dielectric Exclusion","authors":"Wenkai Liu, Xiao-Mao Wang, Danyang Li, Yawei Gao, Kunpeng Wang, Xia Huang","doi":"10.1021/acs.est.5c00277","DOIUrl":"https://doi.org/10.1021/acs.est.5c00277","url":null,"abstract":"Nanofiltration membranes attract extensive attention in solute selective separation, especially in resource extraction and recovery. A prevalent strategy to enhance the monovalent and multivalent ion selective separation performance involves modifying the membrane surface charge properties to influence the Donnan exclusion. However, the counterion adsorption and shielding effects are aggravated with increasing ionic strength, which severely weaken the Donnan exclusion. This study revealed that the contribution of Donnan exclusion was fairly moderate to SO₄^2– rejection in high salinity solutions, while it was dielectric exclusion that exerted the most important influence on Cl^–/SO₄^2– selective separation with a pore radius at 0.35–0.44 nm (molecular weight cutoff at 180–300 Da). Consequently, we proposed that tailored design of nanofiltration membranes with a precise pore radius to fully utilize the steric and dielectric exclusion instead of increasing membrane charge density is more crucial for monovalent/multivalent ion selective separation in high salinity solutions. Overall, our study reveals the importance of dielectric exclusion and provides new insights into nanofiltration membrane customization and application for ion selective separation in high salinity solutions.","PeriodicalId":36,"journal":{"name":"环境科学与技术","volume":"54 1","pages":""},"PeriodicalIF":9.028,"publicationDate":"2025-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143600068","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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":"N-Oxide Zwitterionic-Based Antifouling Loose Nanofiltration Membranes with Superior Water Permeance and Effective Dye/Salt Separation","authors":"Ziming Wang, Shideng Yuan, Dong Wang, Na Zhang, Yun Shen, Zhining Wang","doi":"10.1021/acs.est.5c00916","DOIUrl":"https://doi.org/10.1021/acs.est.5c00916","url":null,"abstract":"Loose nanofiltration (LNF) membranes with high permeance and separation selectivity are highly desired for the effective separation of organic dyes and inorganic salts. Herein, a novel polyamide LNF membrane was fabricated using zwitterionic amine reactant trimethylamine <i>N</i>-oxide-based polyethylenimine (TPEI) and trimesoyl chloride (TMC) via interfacial polymerization (IP). A thin, loose, and smooth polyamide layer was formed due to the low diffusion rate and modified chemical structure of TPEI. The optimized membrane (NF-TPEI) exhibited an extremely high water permeance of 213.0 L m^–2 h^–1 bar^–1, accompanied by outstanding dye rejections of Congo Red (99.8%), Coomassie Brilliant Blue R250 (99.5%), and Evans Blue (99.9%). Meanwhile, the membrane possessed low rejections (&lt;7.0%) of inorganic salts (Na₂SO₄, MgSO₄, MgCl_2, and NaCl). Additionally, the NF-TPEI membrane exhibited outstanding antifouling performance, achieving a superior recovery ratio of 96.0 and 98.1% after the filtration of humic acid and sodium alginate solution, respectively. Compared to the commercial NF270 membrane, the NF-TPEI membrane exhibited significantly improved separation performance in terms of permeance and fouling resistance, which provided more possibilities for high-performance LNF membranes toward the treatment of wastewater with organic contaminants.","PeriodicalId":36,"journal":{"name":"环境科学与技术","volume":"41 1","pages":""},"PeriodicalIF":9.028,"publicationDate":"2025-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143600094","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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":"Coupled Physical-Biogeochemical Dynamics of Polycyclic Aromatic Compounds in the East China Sea.","authors":"Lihong Zhang, Yisen Zhong, Qilian Fan, Shuangzhao Li, Jincai Zhu, Xiao Ma, Yuanli Zhu, Ruiming Wu, Zhiwei Zhang, Feng Zhou, Yuehong Wu, Minghong Cai, Yuxin Ma","doi":"10.1021/acs.est.4c11906","DOIUrl":"10.1021/acs.est.4c11906","url":null,"abstract":"<p><p>Polycyclic aromatic compounds (PACs), including harmful polycyclic aromatic hydrocarbons (PAHs) and more toxic derivatives, are continuously released contaminants. Their provenance and dynamics in coastal oceans remain poorly understood. This study presents the first comprehensive assessment of PACs in coastal oceans by combining their presence with key hydrological and biogeochemical indicators, and potential microbial degradation. High concentrations of Σ₉₂PACs (48-660 ng/L) were observed in the East China Sea, influenced vertically by upwelling and related sediment resuspension during winter. Spatial heterogeneity reveals distinct distribution patterns: PAHs and alkyl-PAHs were mainly influenced by riverine inputs, horizontal transport via coastal currents, and fronts acting as barriers, in contrast, oxygen-PAHs and nitro-PAHs were primarily shaped by secondary transformations within warm water masses rich in nutrients. The relationship between dissolved PACs and chlorophyll <i>a</i> underscores the dominance of biodegradation over the marginal biological pump effect during wintertime low primary productivity. Metagenomic analysis further highlights microbial degradation as a crucial PAC removal pathway, with enhanced microbial diversity driven by terrigenous advection and upwelling. The methodologies and findings of this research provide valuable insights into PAC cycling in coastal oceans.</p>","PeriodicalId":36,"journal":{"name":"环境科学与技术","volume":" ","pages":"4684-4698"},"PeriodicalIF":10.8,"publicationDate":"2025-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143447268","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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":"Contamination of Bivalve Mytilus galloprovincialis, the Case of Radiocobalt in a Context of Environmental Release","authors":"Romain Stefanelli, Maria Rosa Beccia, Anne-Laure Faure, Pier Lorenzo Solari, Sophie Pagnotta, Aurélie Jeanson, Françoise Vernier, Christophe Moulin, Marguerite Monfort, Jean Aupiais, Christophe Den Auwer","doi":"10.1021/acs.est.4c11743","DOIUrl":"https://doi.org/10.1021/acs.est.4c11743","url":null,"abstract":"Since the end of nuclear weapon testing, anthropogenic metallic radionuclides have originated from nuclear accidents such as Chernobyl and Fukushima and controlled releases from the nuclear industry. ⁶⁰Co is an activation product found in the effluents of nuclear power plants, mobile nuclear reactors, and fuel reprocessing facilities. In this paper, we are addressing the question of (radio)cobalt speciation upon bioaccumulation in the sentinel organism <i>Mytilus galloprovincialis</i> after <i>in vivo</i> contamination in a pseudo-natural system. For this study, inductively coupled plasma mass spectrometry and gamma spectroscopy were used to quantify the cobalt distribution in the various organs: hepatopancreas, gills, visceral mass, mantle, foot, and byssus, as well as in subcellular compartments. Two X-ray spectroscopic techniques were used to decipher cobalt speciation and localization, bulk X-ray absorption spectroscopy (XAS with EXAFS and XANES regimes), and micro X-ray fluorescence imaging (μ-XRF). Lastly, secondary ion mass spectrometry images provided information on cobalt distribution at a subcellular scale. The accumulation of cobalt exhibits significant differences depending on the origin of the individuals, with higher concentration factor values for mussels from the Toulon Naval Base (considered as polluted) compared to Villefranche sur Mer, France (considered as unpolluted). However, concentration in organs always follows the same order: byssus ≫ hepatopancreas ≫ other organs. In terms of spatial distribution, cobalt has been visualized in the hepatopancreas, revealing the presence of preferred zones within some digestive cells and this could be linked to detoxification mechanisms. Finally, the determination of speciation data using XAS suggested the presence of a Co(II)-metallothionein complex in the hepatopancreas and a potential Co(II)-mfp-1 complex in the byssus. While they can be challenging, accumulation and speciation studies in radioecology are essential steps for a comprehensive approach to the impact of trace metallic radionuclides on the marine biota.","PeriodicalId":36,"journal":{"name":"环境科学与技术","volume":"19 1","pages":""},"PeriodicalIF":9.028,"publicationDate":"2025-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143599135","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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":"Isotopic Exchange between Aqueous Fe(II) and Solid Fe(III) in Lake Sediment─A Kinetic Assemblage Approach","authors":"David W. O’Connell, Catherine Mccammon, James M. Byrne, Marlene Mark Jensen, Bo Thamdrup, Hans Christian Bruun Hansen, Dieke Postma, Rasmus Jakobsen","doi":"10.1021/acs.est.4c07369","DOIUrl":"https://doi.org/10.1021/acs.est.4c07369","url":null,"abstract":"The catalytic effect of aqueous Fe(II) (Fe²⁺_aq) on the transformation of Fe(oxyhydr)oxides has been extensively studied in the laboratory. It involves the transfer of electrons between Fe²⁺_aq and Fe-(oxyhydr)oxides, rapid atomic exchange of Fe between the two states, and recrystallization of the Fe-oxides into more stable Fe-(oxyhydr)oxides. The potential occurrence of these reactions in natural soils and sediments can have an important impact on biogeochemical cycling of iron, carbon, and phosphorus. We investigated the possible isotopic exchange between Fe²⁺_aq and sedimentary Fe(III) in Fe–Si–C-rich lake sediments. ⁵⁷Fe Mössbauer spectroscopy was used to evaluate Fe mineral speciation in unaltered lake sediments. Unaltered and oxidized sediment laboratory incubations were coupled with a classical kinetic approach that allows a quantitative description of the reactivity of assemblages of Fe-(oxyhydr)oxides found in sediments. Specifically, unaltered and oxidized sediment samples were separately incubated with an ⁵⁵Fe²⁺_aq-enriched solution and exchange was observed between ⁵⁵Fe²⁺_aq and sedimentary Fe(III), highest in the top of the sediment and decreasing with depth with the ⁵⁵Fe²⁺_aq tracer distributed within the bulk of the sedimentary Fe(III) phase. Our results indicate that atomic exchange between Fe²⁺_aq and sedimentary Fe(III) occurs in natural sediments with electrons transferred from the Fe(III)-particle to Fe(III)-particle via Fe²⁺_aq intermediates.","PeriodicalId":36,"journal":{"name":"环境科学与技术","volume":"12 1","pages":""},"PeriodicalIF":9.028,"publicationDate":"2025-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143599134","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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":"Perinatal Bisphenol Exposure and Small-for-Gestational-Age Neonates: The Evolving Effect of Replacements Then and Now.","authors":"Lin Luo, Chang Gao, Yi-Jun Fan, Ting Zhuang, Yuanyuan Li, Chang-An Li, Jia Lv, Zhong-Wang Hu, Lin Tao, Robert Gibson, Hua Wang, De-Xiang Xu, Yichao Huang","doi":"10.1021/acs.est.4c13266","DOIUrl":"https://doi.org/10.1021/acs.est.4c13266","url":null,"abstract":"<p><p>Bisphenol analogues have been shown to have similar estrogenic activity to that of BPA and may affect fetal development. However, no human studies have examined the effects of perinatal exposure to emerging bisphenol alternatives [bisphenol G, bisphenol M, and bisphenol BP (BPBP)] on small for gestational age (SGA) and how placental function may mediate the relationship. Here, 13 urinary bisphenol analogues were detected in 1054 contemporary pregnant women, and BPA was still the most dominant congener. Logistic regressions identified BPA and its traditional alternatives [bisphenol B (BPB), bisphenol E (BPE), bisphenol Z, and bisphenol AP (BPAP)] as being associated with an elevated risk of SGA (all ORs > 1.80, <i>P</i> < 0.05). In contrast, the emerging substitutes, despite high occurrences, all showed much attenuated risk. Mixture effect models Bayesian kernel machine regression and quantile-based <i>g</i>-computation demonstrated that coexposure to bisphenols was strongly correlated with SGA risk (OR = 2.70, <i>P</i> < 0.001), with BPA and the conventional substitutes (BPB, BPE, and BPAP) as primary effect drivers, outweighing the effect from emerging substitutes. Finally, mediation analysis revealed that the placental function index estriol mediated the relationship between exposure and SGA, dominated by BPBP (25.4%). Our findings provide new epidemiological evidence that early BPA alternatives may pose a higher risk for offspring development than those emerging alternatives, potentially via mediation by compromised placental function. Future toxicity assessments and validation studies in other settings on these emerging bisphenols are needed.</p>","PeriodicalId":36,"journal":{"name":"环境科学与技术","volume":" ","pages":""},"PeriodicalIF":10.8,"publicationDate":"2025-03-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143583808","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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":"The Impact of Indoor Environments on the Abundance of Urban Outdoor VOCs","authors":"Li Zhou, Xiaoqiao Jiao, Bo Yang, Wenting Yuan, Wangchao Zhao, Lifang Zhang, Weilin Huang, Shiqian Long, Jiwen Xu, Huizhong Shen, Chen Wang","doi":"10.1021/acs.est.4c13133","DOIUrl":"https://doi.org/10.1021/acs.est.4c13133","url":null,"abstract":"With the upcoming transition to clean electric vehicles, the sources of volatile organic compounds (VOCs) in the ambient environment are rapidly changing and highly uncertain. Here, through systematic characterization of emissions from a typical apartment in a Chinese megacity (Shenzhen), we show that indoor environments contribute significantly to the levels of ambient (i.e., outdoor) VOCs. In particular, we observe that the majority of indoor VOCs originate from unoccupied spaces, demonstrating temperature-dependent release from indoor surface reservoirs. The total indoor-to-outdoor VOC emission rates varied from 53 to 2300 mg day^–1 (median 230 mg day^–1) during unoccupied periods, influenced by both the air exchange rate and indoor temperature. Reanalysis of literature data from various building studies worldwide corroborates our findings and reveals that indoor-to-outdoor emissions scale with room volume, with an average emission rate of 0.33 ± 0.03 mg h^–1 m^–3. Our study implies that indoor-to-outdoor emissions significantly contribute to urban VOC levels, rivaling traditional urban sources, e.g., power generation and biomass burning. This is particularly true for oxygenated VOCs, such as methanol, amounting to ∼60% of transportation emissions. The findings change our understanding of the role of indoor VOC contributions to outdoor air quality, whose importance will increase as controls on industrial and transportation emissions intensify.","PeriodicalId":36,"journal":{"name":"环境科学与技术","volume":"31 1","pages":""},"PeriodicalIF":9.028,"publicationDate":"2025-03-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143582500","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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}