Environmental Engineering Science最新文献

{"title":"Microbial and Chemical Processes in Natural and Engineered Systems","authors":"Susan J. Masten, Raymond M. Hozalski, Thanh H. Helen Nguyen, Catherine A. Peters, Kristine H. Wammer","doi":"10.1089/ees.2023.0239","DOIUrl":"https://doi.org/10.1089/ees.2023.0239","url":null,"abstract":"This special issue honors them: Edward (Ed) Bouwer (1955–2019), Michael (Mike) Aitken (1956–2020), James (Jim) J. Morgan (1932–2020), Deborah (Deb) Swackhamer (1954–2021), and Philip (Phil) Singer (1942–2020). The 16 papers focus on the innovative microbial and chemical processes for addressing both classic problems (e.g., nutrient recovery and wastewater treatment) as well as emerging problems (e.g., biodiversity loss, plastic pollution, biotransformation of organic chemicals, cyanotoxins, and disinfection byproducts).","PeriodicalId":11777,"journal":{"name":"Environmental Engineering Science","volume":"312 6","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135117216","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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":"Microbial Community Structures in Family Anaerobic Digesters Reveal Potentially Differing Waste Conversion Pathways","authors":"Heidi L. Gough, Abigail Kargol, David A.C. Beck, Benjamin G. Therrien, Bed Mani Dahal, Michael D. Marsolek","doi":"10.1089/ees.2023.0038","DOIUrl":"https://doi.org/10.1089/ees.2023.0038","url":null,"abstract":"Family-scale rural digesters are widely implemented in Nepal for waste management, resource recovery, and environmental stewardship for distributed communities. However, there is little documentation on the microbial community structures in real-world family farm digesters. This work compared microbial community structures in four family digesters with a near-by municipal digester. Included in the family digesters was a high-altitude family digester located on Mt. Everest in Mosi, Nepal (2,634 m elevation). Differences in the community structures included the prevalence in family digesters of Bathyarchaeota MGC-6. MCG-6 is an archaeal population putatively involved in autotrophic acetate generation and conversion of cellulose to sugars. In addition, Rikenellaceae DMER64, a population thought to degrade sugars, was more prevalent in the family digesters. The ratio of Methanothrix to hydrogenotrophic methanogens was higher in the family digesters. In addition, the dominant species of syntrophic hydrogen-producing bacteria differed. Syntrophobacter and Syntrophomonas species, documented for their critical roles in waste activated sludge digesters, were not detected. In conclusion, observed differences in microbial community composition suggested a capacity to support different substrate conversion pathways and a major role of Archaea beyond methanogenesis among the studied digesters.","PeriodicalId":11777,"journal":{"name":"Environmental Engineering Science","volume":"126 ","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136102581","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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":"Atenolol Biotransformation by Denitrifying Mixed Culture Communities","authors":"Amy E. Hunter, C. Andrew Ramsburg","doi":"10.1089/ees.2023.0064","DOIUrl":"https://doi.org/10.1089/ees.2023.0064","url":null,"abstract":"The biotransformation of atenolol, sotalol, and metoprolol by mixed culture denitrifying communities was examined as a function of carbon availability and pharmaceutical concentration to explore the possible roles of cometabolism and direct substrate utilization. Sotalol and metoprolol were not found to be transformed. A matrix of conditions explored the biotransformation of water resource recovery facility relevant (25 μg/L) and chemical oxygen demand (COD)-equivalent (10–100 mg/L) atenolol concentrations in batch reactors (1 L) containing 25 mg-N/L nitrate. Carbon (MicroC® 2000) conditions included Nonlimiting (COD:N ratio >10), Partially Limiting (COD:N ratio = 2–3), and Limiting (COD:N ratio <1). Reactors without atenolol served as denitrification control experiments. Results suggest that atenolol did not appreciably influence nitrate reduction. The extent of atenolol degradation was independent of carbon availability. In the experiments conducted in the μg/L range, 30–40% biotransformation was observed. Scant degradation at higher concentrations suggested that direct utilization of the pharmaceutical was either unlikely or occurring slowly and independent of the pharmaceutical concentration. Process-based modeling using the Activated Sludge Model framework assessed denitrification across carbon availability conditions and incorporated three individual pharmaceutical biotransformation modeling strategies: (1) direct metabolism model; (2) cometabolic model, and (3) biotransformation kinetic model. Results suggest that there was insufficient evidence to suspect direct metabolism meaningfully contributed to the reduction in atenolol concentration. The cometabolic process-based model, including both growth and nongrowth-linked rate coefficients offered the best model performance, although growth-linked cometabolism was limited and not readily apparent across all experiments (growth-linked transformation coefficient <0.4 g-atenolol·g-COD−1). Thus, the biotransformation kinetic model is favored for monitoring and forecasting biotransformation in larger-scale systems because use of the parsimonious model (rate coefficient of 7 mg-atenolol·g-COD−1·d−1) resulted in only modest performance reductions. The biotransformation model represents an improvement over pseudo first-order models as it is a mixed-order kinetic model that is linked to transient biomass conditions.","PeriodicalId":11777,"journal":{"name":"Environmental Engineering Science","volume":"201 2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135510078","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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":"Source Apportionment and Analysis of Spatial Representativeness of Fine Particle Pollution for an Urban Residential Area in Lucknow, India","authors":"Sreekanth Bojjagani, S.S. Kalikinkar Mahanta, Hari Om Prasad, Altaf Husain Khan, Ganesh Chandra Kisku","doi":"10.1089/ees.2023.0120","DOIUrl":"https://doi.org/10.1089/ees.2023.0120","url":null,"abstract":"Land use changes in the wake of urbanization have arranged the urban residential sites to be encircled by anthropogenic activities, resulting in greater exposure to air pollution. There are limited studies carried out on source apportionment of urban landscape-induced air pollution and their spatial representativeness for urban residential sites, and the present study addressed this issue. Characterization, dissemination analysis, and source apportionment of particulate matter (PM)2.5 in a residential area, Lucknow have been carried out. Samples of PM2.5 were collected during mid-winter 2021–2022 at near-road-locations (viz. L1, L2, L3, and L4) of the study area. Samples of PM2.5 chemical speciation were done by inductively coupled plasma mass spectrometry and ion chromatography for 26-elements and 5-ions, respectively. Mean PM2.5 was recorded highest at L3 in the daytime and lowest at L4 in the nighttime with the values 166 μg/m3 and 76 μg/m3 respectively. ArcGIS-inverse distance weighing (IDW) simulations identified the representativeness of PM2.5 for the entire residential site. IDW mapping identified the PM2.5 propagation up to 200 m–500 m over the study area. The diversity in the concentration of PM2.5 observed within the residential area due to the influence of the respective day and night times, multiple sources mix and their spatial distribution. Chemical speciation data of PM2.5 applied to Positive Matrix Factorization version 5.0—as receptor model (PMF v5.0) run for individual sites separately and pool all four sites' data together as a single dataset, which ultimately confirmed seven factors. The PMF model outputs ascertained the mean apportionment of PM2.5 by the determined seven local sources that is, vehicular exhaust—21%, resuspended road dust—15%, cooking fuel emission—12%, waste burning—12%, diesel generator sets exhaust—10%, secondary aerosols—10%, and Construction and Demolition—7%. The remaining 13% mean contribution to PM2.5 was evidenced by unaccounted sources. The present study outcomes qualify the significance to undertake source apportionment studies in connection with urban landscape patterns for air pollution abatement specifically for rapidly changing cities.","PeriodicalId":11777,"journal":{"name":"Environmental Engineering Science","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135413702","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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":"A Lightweight Deep Learning Algorithm for Multi-Objective Detection of Recyclable Domestic Waste","authors":"Qunbiao Wu, Tao Liang, Haifeng Fang, Yangyang Wei, Mingqiang Wang, Defang He","doi":"10.1089/ees.2023.0138","DOIUrl":"https://doi.org/10.1089/ees.2023.0138","url":null,"abstract":"In light of the rapid development of human society, there has been a notable surge in waste production, which has resulted in environmental pollution and degradation. This is a pervasive issue that requires attention. To address the environmental problems caused by waste generation and advance the development of recyclable domestic waste detection, this article proposes waste classification as a solution. Traditional waste sorting methods have proven to be inefficient and prone to errors, hence the need for a more effective approach. A multiobjective recyclable domestic waste detection and classification method based on improved You Only Look Once v5s (YOLOv5s) is proposed in this study. In this study, the network structure is enhanced through the implementation of the Bidirectional Pyramid Network (BiFPN). The coordinate attention mechanism is then incorporated to elevate the accuracy of the model. Additionally, the loss function is refined by adopting the Efficient Intersection Over Union Loss (EIOU_Loss) metric to further optimize network performance. Finally, the introduction of the Ghost convolution module reduces parameter count and significantly improves the real-time detection speed. The waste dataset named Multi-classified Recyclable Domestic Trash Identification Dataset (MULTI-TRASH), which is composed of machine shooting, web crawler, and artificial photography, is used for verification due to its good generalization and representativeness. The mean Average Precision at a threshold of 0.5 ([email protected]) value of 94.8% is achieved by the improved model, which is a 30.72% reduction in the number of parameters and a 1.2% improvement in the [email protected] value compared with YOLOv5s. The effectiveness of the proposed algorithm is proved by a comparison with other target detection algorithms. This study aims to provide technical references for the development of a recyclable domestic waste detection system.","PeriodicalId":11777,"journal":{"name":"Environmental Engineering Science","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136356846","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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":"Recirculating Vertical Hydroponic Systems: Effect of Light and Nutrient Solution Composition on Nitrification Activity","authors":"Jorge L. Calabria, Armando Oliva, Piet N.L. Lens, Daniel H. Yeh","doi":"10.1089/ees.2023.0181","DOIUrl":"https://doi.org/10.1089/ees.2023.0181","url":null,"abstract":"Nitrogen-rich effluents from anaerobic processes present nutrient resource recovery opportunities for fertilizer applications in hydroponic systems, thus facilitating agricultural production in less conventional contexts such as urbanized areas. However, the high ammonia and soluble chemical oxygen demand, which is common in anaerobic digestate, can inhibit crop development in a hydroponic system, requiring conditioning to enable optimal performance of the system. This study examines the use of three nutrient sources to support the growth of lettuce (Lactuca sativa) in vertical hydroponic systems: (i) synthetic permeate (SP) solution, (ii) desorption solution (DS) from an anaerobic membrane bioreactor (AnMBR), and (iii) DS modified with acetic acid addition. Two light conditions were used to observe the effect of photon flux (from 150–200 to 10–15 μmol/[m2·s]) on lettuce crop development and nitrification efficiency of the treated AnMBR permeate. Fresh and dry mass of the harvested lettuce crops as well as chlorophyll content were measured as an indicator of crop quality after a 13-day development period. Crops grown under well-lit conditions in DS had harvested fresh weight (2929.0 ± 454.6 mg/plant) than SP-grown crops (2646.2 ± 908.8 mg/plant). The lighting conditions did not significantly impact the nitrification efficiency; thus nitrate, the preferred form of nitrogen for supporting lettuce crop development, was sufficiently available to support crop growth in the recirculating hydroponic systems.","PeriodicalId":11777,"journal":{"name":"Environmental Engineering Science","volume":"62 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135690003","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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":"Are Showerhead Filters Retailed Online a Scam? Investigating Water Quality Claims Through a Course-Based Research Experience","authors":"Elizabeth Dach, Lara David, Julian Van der Made, Mariah Pope, Joshua Chabeda, Adam Brown, John C. Foo, Ngai Yin Yip","doi":"10.1089/ees.2023.0099","DOIUrl":"https://doi.org/10.1089/ees.2023.0099","url":null,"abstract":"Showerhead filters are point-of-use devices installed just before showerheads to alter bathing water quality. Such products are gaining popularity but are presently not under any regulatory oversight. Sellers of showerhead filters make wide-ranging claims, including removing harmful substances, modifying pH, and adding elements to the water matrix, and tout health and cosmetic benefits, but without providing substantiating evidence upfront. This study evaluates selected water chemistry parameters, including pH and concentrations of vitamin C, fluoride, and chlorine, of five showerhead filters sold on AMAZON.COM and finds that most of the sellers' water quality claims are not met. Instead, some filters change a number of water quality parameters opposite to what is marketed, for example, water hardness and dissolved oxygen. We conclude that the sellers of showerhead filters are, at the very least, guilty of promoting misleading advertisements, but more likely culpable of exploiting pseudoscience to profit from consumers' poor literacy in water chemistry. This study is the outcome of a course-based research experience for senior undergraduate and junior graduate students implemented in a technical elective on environmental physicochemical processes. Through sharing the design and execution of this experimental investigation and discussing the wider pedagogical benefits, this study further aims to stimulate others to explore the integration of research and education. On a broader perspective, this study sheds light on the worrying contagion of pseudoscience in water quality engineering and underscores the urgent need to enlighten the public and promote their scientific literacy.","PeriodicalId":11777,"journal":{"name":"Environmental Engineering Science","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135324153","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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":"AEESP Spotlight: Late 2023","authors":"David A. Ladner","doi":"10.1089/ees.2023.0245","DOIUrl":"https://doi.org/10.1089/ees.2023.0245","url":null,"abstract":"Environmental Engineering ScienceAhead of Print AEESP Spotlight: Late 2023David A. LadnerDavid A. Ladner*Corresponding author: Department of Environmental Engineering and Earth Sciences, Clemson University, 342 Computer Court, Anderson, SC 29625, USA. Phone: 1-864-656-5572; E-mail Address: [email protected]https://orcid.org/0000-0002-9214-783XDepartment of Environmental Engineering and Earth Sciences, Clemson University, Anderson, South Carolina, USA.†Member of AEESP.Search for more papers by this authorPublished Online:3 Oct 2023https://doi.org/10.1089/ees.2023.0245AboutSectionsView articleView Full TextPDF/EPUB Permissions & CitationsDownload CitationsTrack CitationsAdd to favorites Back To Publication ShareShare onFacebookTwitterLinked InRedditEmail View article\"AEESP Spotlight: Late 2023.\" Environmental Engineering Science, , pp. FiguresReferencesRelatedDetails Volume 0Issue 0 InformationCopyright 2023, Mary Ann Liebert, Inc., publishersTo cite this article:David A. Ladner.AEESP Spotlight: Late 2023.Environmental Engineering Science.ahead of printhttp://doi.org/10.1089/ees.2023.0245Online Ahead of Print:October 3, 2023PDF download","PeriodicalId":11777,"journal":{"name":"Environmental Engineering Science","volume":"145 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134935275","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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":"Photocatalytic Performance of Boron-Doped TiO₂ for Treatment of Rhodamine-B Dye and Industrial Wastewater Under Ultraviolet Irradiation","authors":"Shreyansh Tatiya, Mohit Pandey, Satyam Gupta, Shantanu Bhattacharya","doi":"10.1089/ees.2023.0026","DOIUrl":"https://doi.org/10.1089/ees.2023.0026","url":null,"abstract":"The organic dyes that have been added to water by various industrial effluents possess a serious threat to the environment due to their mutagenic character. TiO2 has been widely employed as a photocatalysis for the degradation of these dyes. However, a non-metal doped TiO2 can be a promising candidate for the advanced treatment of industrial wastewater containing organic dyes. In this work, we have prepared and tested different boron-doped TiO2 photocatalysts to examine the effect of boron addition on the photocatalytic activity of TiO2. The various boron precursors used are boric acid (BA), boron oxide (BO), and boron nitride (BN), through which Boron is formulated and is doped through a single-step sol-gel method. The prepared nanocomposites are characterized using various characterization techniques, such as Field Emission Scanning Electron Microscopy (FESEM), Transmission electron microscopy (TEM), ultraviolet-visible (UV-Vis) and Raman spectroscopy, X-ray diffraction (XRD), Fourier Transform Infrared (FTIR) spectroscopy, photoluminescence, and X-ray Photoelectron Spectroscopy (XPS) analysis. UV light of wavelength 365 nm has been used for studying the photocatalyst behavior. Both rhodamine-B (RhB) and industrial wastewater samples have been studied for degradation kinetics. The boron-doped TiO2 nanocomposites show a high level of dye degradation (>95%) with RhB dye and (>63%) with industrial wastewater samples. Further, TiO2-BA composites in both the cases showed maximum dye degradation compared with other boron nanocomposites with an enhancement in the efficiency of (>13%) over a pure phase of TiO2.","PeriodicalId":11777,"journal":{"name":"Environmental Engineering Science","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135323889","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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":"Simultaneous Removal of Ammonium and Nitrite in Aqueous Suspensions of Ferric Tannate Powder by Adsorption and Catalysis","authors":"Zhu Liang, Mingluo Zhou, Zhou Xu, Yuankun Yang","doi":"10.1089/ees.2023.0012","DOIUrl":"https://doi.org/10.1089/ees.2023.0012","url":null,"abstract":"Ferric tannate (TA-Fe3+) has the potential to transform ammonium (NH4+) and nitrite (NO2−) into nitrogen gas (N2) through adsorption and catalysis. Few reports have given detailed account of different adsorption behavior for NH4+ and NO2−, which is important to develop the potential of the material. TA-Fe3+ was synthesized here and its performance as an adsorbent/catalyst for the simultaneous removal of NH4+ and NO2− from water was investigated. Results confirmed the adsorption and catalysis capability of TA-Fe3+ toward NH4+ and NO2−: (1) Following a 24 h adsorption and redox, the concentrations of NH4+ and NO2− in the mixed solution decreased from initial values of 10.71 and 7.14 to 4.28 and 1.64 mmol/L, respectively, and 0.41 mmol/g of N2 was produced with a maximal N2 yield rate of 0.072 mmol/[g·h]. The N2 yield was about 144 times that in the absence of TA-Fe3+; (2) intermediate products such as nitrous oxide (N2O) and nitrate (NO3−) were not detected; and (3) Raman spectrum analysis identified the site of Fe–O bond to be the center of adsorption and catalysis. Moreover, there were interesting findings: (1) TA-Fe3+ exhibited significantly distinct adsorption behavior toward NH4+ and NO2−. External diffusion and internal diffusion exerted a key influence on the adsorption toward NH4+ and NO2−, respectively; NH4+ was adsorbed on TA-Fe3+ in the form of monolayer, and NO2− in the forms of both monolayer and multilayer; (2) TA-Fe3+ was easily regenerated with water; and (3) adsorption toward NO2− was the rate-determining step of the catalytic reaction. These findings will provide valuable enlightenment for the further work to reveal the adsorption and catalysis mechanisms of TA-Fe3+.","PeriodicalId":11777,"journal":{"name":"Environmental Engineering Science","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135367689","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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}