This paper studies the quality monitoring decision-making and quality guarantee deposit withhold- ing strategy of the owner in the construction supply chain composed of the owner and the contractor in the engineering construction project under different information environments. Taking the qual- ity monitoring level and quality guarantee deposit retention as the owner’s decision variables and the credit level as the contractor’s decision variables, when the owner’s quality monitoring cost and the contractor’s credit are non-concave and non-convex functions, the optimal solution of the owner’s quality monitoring decision and quality guarantee deposit retention strategy under symmetric information, asymmetric information and incomplete information are deduced by using the maximum principle. Through simulation calculation, the decision results under different information conditions are analyzed. It helps to improve the effectiveness and reliability of the owner’s quality monitoring and realize the expected quality control objectives and quality benefits.
{"title":"A determining method of the water consultancy project quality guarantee deposit considering the contractor's credit level under the incomplete information condition","authors":"Xiangtian Nie, Zihan Chen, Min Li, Bo Wang","doi":"10.5004/dwt.2023.29435","DOIUrl":"https://doi.org/10.5004/dwt.2023.29435","url":null,"abstract":"This paper studies the quality monitoring decision-making and quality guarantee deposit withhold- ing strategy of the owner in the construction supply chain composed of the owner and the contractor in the engineering construction project under different information environments. Taking the qual- ity monitoring level and quality guarantee deposit retention as the owner’s decision variables and the credit level as the contractor’s decision variables, when the owner’s quality monitoring cost and the contractor’s credit are non-concave and non-convex functions, the optimal solution of the owner’s quality monitoring decision and quality guarantee deposit retention strategy under symmetric information, asymmetric information and incomplete information are deduced by using the maximum principle. Through simulation calculation, the decision results under different information conditions are analyzed. It helps to improve the effectiveness and reliability of the owner’s quality monitoring and realize the expected quality control objectives and quality benefits.","PeriodicalId":11260,"journal":{"name":"Desalination and Water Treatment","volume":"49 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83254548","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
B. Szczepanik, Laura Frydel, P. Słomkiewicz, D. Banaś, I. Stabrawa, A. Kubala-Kukuś
{"title":"Adsorptive removal of chloroxylenol and chlorophene from aqueous solutions using carbon-halloysite nanocomposites obtained from corrugated cardboard as a carbon precursor","authors":"B. Szczepanik, Laura Frydel, P. Słomkiewicz, D. Banaś, I. Stabrawa, A. Kubala-Kukuś","doi":"10.5004/dwt.2023.29212","DOIUrl":"https://doi.org/10.5004/dwt.2023.29212","url":null,"abstract":"","PeriodicalId":11260,"journal":{"name":"Desalination and Water Treatment","volume":"18 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83361271","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Hongyu Shi, Yao Zhang, J. Ye, Jiajin Yu, Lijun Luo, Hong Wang, Min Yang, Guizhen Li
The toxic organic pollutant with high concentration in landfill leachate is increasingly harmful to human health. In order to treat landfill leachate more efficiently, a novel cheap organobentonite (CTMAB-bentonite) was successfully prepared from Na-bentonite modified with cetyltrimethylam-monium bromide (CTMAB) as intercalation agent. The CTMAB-bentonite were characterized by X-ray diffraction (XRD) and Fourier-transform infrared spectroscopy, and the effects of contact time, CTMAB concentration, temperature and pH on the adsorption performance were investigated. XRD analysis results showed that CTMAB with concentration of 4 mmol/5 g was successfully intercalated into bentonite, and the layer spacing of CTMAB-bentonite increased by 6 Å than larger that before modification. The adsorption experiment results indicated that the best adsorption time is 60 min, pH and temperature have little effect on the adsorption performance. The adsorption process of landfill leachate conforms to the Freundlich and pseudo-second-order kinetic model, which indicated a multimolecular layer and chemical adsorption, respectively. Thermodynamic parameters confirmed that adsorption process was spontaneous and exothermic. Bentonite modified by CTMAB has a satisfactory adsorption effect on leachate and satisfactory adsorption capacity. CTMAB-bentonite was an excellent adsorbent for removal of landfill leachate which was promising in the field of wastewater treatment.
{"title":"Preparation and adsorption performance of CTMAB-bentonite on landfill leachate","authors":"Hongyu Shi, Yao Zhang, J. Ye, Jiajin Yu, Lijun Luo, Hong Wang, Min Yang, Guizhen Li","doi":"10.5004/dwt.2023.29486","DOIUrl":"https://doi.org/10.5004/dwt.2023.29486","url":null,"abstract":"The toxic organic pollutant with high concentration in landfill leachate is increasingly harmful to human health. In order to treat landfill leachate more efficiently, a novel cheap organobentonite (CTMAB-bentonite) was successfully prepared from Na-bentonite modified with cetyltrimethylam-monium bromide (CTMAB) as intercalation agent. The CTMAB-bentonite were characterized by X-ray diffraction (XRD) and Fourier-transform infrared spectroscopy, and the effects of contact time, CTMAB concentration, temperature and pH on the adsorption performance were investigated. XRD analysis results showed that CTMAB with concentration of 4 mmol/5 g was successfully intercalated into bentonite, and the layer spacing of CTMAB-bentonite increased by 6 Å than larger that before modification. The adsorption experiment results indicated that the best adsorption time is 60 min, pH and temperature have little effect on the adsorption performance. The adsorption process of landfill leachate conforms to the Freundlich and pseudo-second-order kinetic model, which indicated a multimolecular layer and chemical adsorption, respectively. Thermodynamic parameters confirmed that adsorption process was spontaneous and exothermic. Bentonite modified by CTMAB has a satisfactory adsorption effect on leachate and satisfactory adsorption capacity. CTMAB-bentonite was an excellent adsorbent for removal of landfill leachate which was promising in the field of wastewater treatment.","PeriodicalId":11260,"journal":{"name":"Desalination and Water Treatment","volume":"53 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91219274","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Optimization of chemical oxygen demand removal from petroleum refinery wastewater by electrocoagulation using tubular electrochemical reactor with a novel design","authors":"G. F. Naser, T. Mohammed, A. Abbar","doi":"10.5004/dwt.2023.29139","DOIUrl":"https://doi.org/10.5004/dwt.2023.29139","url":null,"abstract":"","PeriodicalId":11260,"journal":{"name":"Desalination and Water Treatment","volume":"52 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91271934","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Jia-Jia Zhang, Yu-Chang Wang, Juan Jin, Wen-Fu Yan, Ying-Chun Guo, Yuan-Peng Wang, Pei-Yu Duan, Li-Xia Yang, Fa-Ju Hou, Jun-Shen Liu
Under the hydrothermal method, a Pb(II) coordination polymer [Pb(ox)(phen) 2 ]·5H 2 O 1 (ox = oxalate, phen = 1,10-phenanthroline) was obtained. Ox ligands exhibit a m 2 -coordination mode, which connect Pb 2+ centers into a 1-D single-chain with ancillary phen molecules. Interestingly, adjacent phen molecules between the chains exist π…π stacking interaction, which extend the 1-D chain into a 2-D supramolecular layer. Compound 1 showed outstanding photocatalytic performance and the degradation efficiency of methylene blue with H 2 O 2 could reach 95.69% under the irradiation of visible light at pH = 10. In addition, 5 cycles of degradation experiments were also carried out, and it was found that the degradation efficiency values with and without H 2 O 2 were reduced by 1.46% and 1.08%, respectively. It was also discussed that which free radical played the dominant role in the photocatalytic process. What’s more, we speculated the possible reaction mechanism based on the Mott–Schottky curve. Meanwhile, the UV visible diffuse reflection of compound 1 was also investigated.
{"title":"The study on visible photocatalytic activity of an oxalate-extended Pb(II) coordination polymer","authors":"Jia-Jia Zhang, Yu-Chang Wang, Juan Jin, Wen-Fu Yan, Ying-Chun Guo, Yuan-Peng Wang, Pei-Yu Duan, Li-Xia Yang, Fa-Ju Hou, Jun-Shen Liu","doi":"10.5004/dwt.2023.29546","DOIUrl":"https://doi.org/10.5004/dwt.2023.29546","url":null,"abstract":"Under the hydrothermal method, a Pb(II) coordination polymer [Pb(ox)(phen) 2 ]·5H 2 O 1 (ox = oxalate, phen = 1,10-phenanthroline) was obtained. Ox ligands exhibit a m 2 -coordination mode, which connect Pb 2+ centers into a 1-D single-chain with ancillary phen molecules. Interestingly, adjacent phen molecules between the chains exist π…π stacking interaction, which extend the 1-D chain into a 2-D supramolecular layer. Compound 1 showed outstanding photocatalytic performance and the degradation efficiency of methylene blue with H 2 O 2 could reach 95.69% under the irradiation of visible light at pH = 10. In addition, 5 cycles of degradation experiments were also carried out, and it was found that the degradation efficiency values with and without H 2 O 2 were reduced by 1.46% and 1.08%, respectively. It was also discussed that which free radical played the dominant role in the photocatalytic process. What’s more, we speculated the possible reaction mechanism based on the Mott–Schottky curve. Meanwhile, the UV visible diffuse reflection of compound 1 was also investigated.","PeriodicalId":11260,"journal":{"name":"Desalination and Water Treatment","volume":"23 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73623729","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A novel three Gemini cationic surfactants was created in this study by one step of alkylating 4-(dimethylamino)benzaldehyde with 1,6-dibromohexane, 1,8-dibromooctane, and 1,10-dibromo-decane in acetone. The chemical structures of the generated cationic surfactants were examined using Fourier-transform infrared spectroscopy and proton nuclear magnetic resonance ( 1 H NMR). After measuring the surface tension at various temperatures, the surface parameters, including the critical micelle concentration (CMC), effectiveness (π CMC ), maximum surface excess (Γ max ), efficiency (Pc 20 ), and minimum surface area ( A min ), were calculated. Adsorption and micellization’s thermodynamic characteristics were calculated, and the results revealed that both processes are sponta-neous. It is clear that the Gemini surfactants created have a high tendency to adsorb at the interfaces as well as micellize in the majority of their solutions. The antibacterial activity of the generated surfactants against Gram-negative, Gram-positive, and fungus was examined. The Gemini surfac-tants’ antibacterial effectiveness was enhanced from 22 to 36 mm by an increase in their hydrophobicity and spacer length.
{"title":"Gemini cationic surfactant based 4-(dimethylamino)benzaldehyde: surface characteristics and biological activity, a straightforward one-step synthesis","authors":"M. Bekhit, S. Shafek, M. Younus","doi":"10.5004/dwt.2023.29503","DOIUrl":"https://doi.org/10.5004/dwt.2023.29503","url":null,"abstract":"A novel three Gemini cationic surfactants was created in this study by one step of alkylating 4-(dimethylamino)benzaldehyde with 1,6-dibromohexane, 1,8-dibromooctane, and 1,10-dibromo-decane in acetone. The chemical structures of the generated cationic surfactants were examined using Fourier-transform infrared spectroscopy and proton nuclear magnetic resonance ( 1 H NMR). After measuring the surface tension at various temperatures, the surface parameters, including the critical micelle concentration (CMC), effectiveness (π CMC ), maximum surface excess (Γ max ), efficiency (Pc 20 ), and minimum surface area ( A min ), were calculated. Adsorption and micellization’s thermodynamic characteristics were calculated, and the results revealed that both processes are sponta-neous. It is clear that the Gemini surfactants created have a high tendency to adsorb at the interfaces as well as micellize in the majority of their solutions. The antibacterial activity of the generated surfactants against Gram-negative, Gram-positive, and fungus was examined. The Gemini surfac-tants’ antibacterial effectiveness was enhanced from 22 to 36 mm by an increase in their hydrophobicity and spacer length.","PeriodicalId":11260,"journal":{"name":"Desalination and Water Treatment","volume":"28 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73637850","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Contents Vol. 293","authors":"","doi":"10.5004/dwt.2023.29694","DOIUrl":"https://doi.org/10.5004/dwt.2023.29694","url":null,"abstract":"","PeriodicalId":11260,"journal":{"name":"Desalination and Water Treatment","volume":"23 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73876582","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Milena Tadić, Irena Nikolić, Nevana Cupara, D. Djurović, I. Milašević
This study investigated strontium removal from aqueous solution using electric arc furnace (EAF) slag. Influence of sorbent dosage (0.5–3 g/L), pH (2.5–9.5), initial concentration of Sr 2+ (50–300 ppm) and temperature (20°C–45°C) was evaluated. Optimal sorbent dosage and initial Sr 2+ concentration were found to be 1.5 g/L and 150 ppm, respectively. Kinetics, equilibrium and thermodynamic models were used to analyse the data. Kinetics of Sr 2+ adsorption onto EAF slag was evaluated using pseudo-first-order and pseudo-second-order models and results have shown that experimental data had a better fit with the pseudo-second-order model. Langmuir and Freundlich isotherm models were used for evaluating the adsorption equilibrium and it has been shown that Langmuir model better described isotherm data. Maximal adsorption capacities of 111.11, 129.87 and 156.25 mg/g were obtained at 20°C, 30°C and 45°C, respectively. Thermodynamic investigation indicated that adsorption of Sr 2+ onto EAF slag is endothermic in nature, spontaneous and more favorable at higher temperatures.
{"title":"Strontium removal from aquatic solution using electric arc furnace slag: kinetic, equilibrium and thermodynamic approach","authors":"Milena Tadić, Irena Nikolić, Nevana Cupara, D. Djurović, I. Milašević","doi":"10.5004/dwt.2023.29559","DOIUrl":"https://doi.org/10.5004/dwt.2023.29559","url":null,"abstract":"This study investigated strontium removal from aqueous solution using electric arc furnace (EAF) slag. Influence of sorbent dosage (0.5–3 g/L), pH (2.5–9.5), initial concentration of Sr 2+ (50–300 ppm) and temperature (20°C–45°C) was evaluated. Optimal sorbent dosage and initial Sr 2+ concentration were found to be 1.5 g/L and 150 ppm, respectively. Kinetics, equilibrium and thermodynamic models were used to analyse the data. Kinetics of Sr 2+ adsorption onto EAF slag was evaluated using pseudo-first-order and pseudo-second-order models and results have shown that experimental data had a better fit with the pseudo-second-order model. Langmuir and Freundlich isotherm models were used for evaluating the adsorption equilibrium and it has been shown that Langmuir model better described isotherm data. Maximal adsorption capacities of 111.11, 129.87 and 156.25 mg/g were obtained at 20°C, 30°C and 45°C, respectively. Thermodynamic investigation indicated that adsorption of Sr 2+ onto EAF slag is endothermic in nature, spontaneous and more favorable at higher temperatures.","PeriodicalId":11260,"journal":{"name":"Desalination and Water Treatment","volume":"22 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77419951","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Colour removal from effluents remains one of the most challenging requirements faced by indus - tries due to the difficulty of degrading dyes which consequently escape conventional wastewater treatment processes and persist in the environment. This study aimed to assess and optimise the dye adsorption performance of banana floret, a novel biosorbent. Batch experiments were con - ducted to assess the effects of particle size, pH, agitation, temperature, initial concentration and sorbent dose. Kinetic and equilibrium data were modelled, and mass transfer studies were con - ducted to elucidate the mechanisms of biosorption. Equilibrium data were best simulated using the Sips and Langmuir isotherm models. At an optimum pH of 6.0, biosorbent dose of 1.0 mg·L –1 and temperature of 300 K, a maximum sorption capacity of 219 mg·g –1 was observed. The kinetic data were best represented by the pseudo-second-order model. The dominant transport mechanism was attributed to intraparticle diffusion, while the dominant attachment mechanism was phys - ical sorption. The Taguchi method, in combination with analysis of variance, was used to deter - mine the optimum levels of operational parameters for maximising the biosorption of methylene blue by banana floret. The parameter group which produced the highest biosorption capacity and percent removal was determined to be A3-B1-C3 (initial concentration = 200 mg·L –1 , biosorbent dose = 500 mg·L –1 , contact time = 60 min) and A1-B3-C3 (initial concentration = 50 mg·L –1 , biosor - bent dose = 2000 mg·L –1 , contact time = 20 min), respectively. Among these parameters, the initial concentration had the most significant effect on the biosorption capacity, while sorbent dose was most significant on percent removal. A predictive model based on a quadratic equation which incorporates the factor interactions was successfully developed and validated.
{"title":"Biosorption of methylene blue dye using banana floret:: kinetic, equilibrium, thermodynamic and mass transfer studies","authors":"Clint Sutherland, Beverly Chittoo, Vikash Laltoo","doi":"10.5004/dwt.2023.29348","DOIUrl":"https://doi.org/10.5004/dwt.2023.29348","url":null,"abstract":"Colour removal from effluents remains one of the most challenging requirements faced by indus - tries due to the difficulty of degrading dyes which consequently escape conventional wastewater treatment processes and persist in the environment. This study aimed to assess and optimise the dye adsorption performance of banana floret, a novel biosorbent. Batch experiments were con - ducted to assess the effects of particle size, pH, agitation, temperature, initial concentration and sorbent dose. Kinetic and equilibrium data were modelled, and mass transfer studies were con - ducted to elucidate the mechanisms of biosorption. Equilibrium data were best simulated using the Sips and Langmuir isotherm models. At an optimum pH of 6.0, biosorbent dose of 1.0 mg·L –1 and temperature of 300 K, a maximum sorption capacity of 219 mg·g –1 was observed. The kinetic data were best represented by the pseudo-second-order model. The dominant transport mechanism was attributed to intraparticle diffusion, while the dominant attachment mechanism was phys - ical sorption. The Taguchi method, in combination with analysis of variance, was used to deter - mine the optimum levels of operational parameters for maximising the biosorption of methylene blue by banana floret. The parameter group which produced the highest biosorption capacity and percent removal was determined to be A3-B1-C3 (initial concentration = 200 mg·L –1 , biosorbent dose = 500 mg·L –1 , contact time = 60 min) and A1-B3-C3 (initial concentration = 50 mg·L –1 , biosor - bent dose = 2000 mg·L –1 , contact time = 20 min), respectively. Among these parameters, the initial concentration had the most significant effect on the biosorption capacity, while sorbent dose was most significant on percent removal. A predictive model based on a quadratic equation which incorporates the factor interactions was successfully developed and validated.","PeriodicalId":11260,"journal":{"name":"Desalination and Water Treatment","volume":"43 7-12 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77488967","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Efficient removal of polyethylene and polyvinyl chloride microplastics from water using a modified coagulation process supported by the addition of a surfactant","authors":"Sabina Ziembowicz, M. Kida, P. Koszelnik","doi":"10.5004/dwt.2023.29398","DOIUrl":"https://doi.org/10.5004/dwt.2023.29398","url":null,"abstract":"","PeriodicalId":11260,"journal":{"name":"Desalination and Water Treatment","volume":"818 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77542656","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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