Jordan Journal of Chemistry最新文献_第4页

Effectiveness of ZnO Nano Particles against the Foodborne Microbial Pathogens E. coli and S. aureus 氧化锌纳米颗粒对食源性病原菌大肠杆菌和金黄色葡萄球菌的抑制作用

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Jordan Journal of Chemistry Pub Date : 2020-08-26 DOI: 10.47014/15.2.4

Khaled Saif Aldin, S. Al-Hariri, Adnan Ali-Nizam

引用次数: 2

Synthesis of Some Pyrazole Derivatives from 5-Chloro- and 5-Azido-1,3-diphenyl-1H-pyrazole-4-carbaldehydes 5-氯和5-叠氮-1,3-二苯基- 1h -吡唑-4-乙醛衍生物的合成

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Jordan Journal of Chemistry Pub Date : 2020-08-04 DOI: 10.47014/15.1.4

M. Farhat

引用次数: 0

Removal of Pb(II), Zn(II), Sn(II) and Cu(II) Ions from Aqueous Solutions by Linear Alternating Poly(4,4'-biphenol oxalate) Oligomer 线性交替聚（4,4'-二苯酚草酸盐）低聚物去除水溶液中的Pb（II）、Zn（II），Sn（II）和Cu（II）离子

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Jordan Journal of Chemistry Pub Date : 2020-08-01 DOI: 10.47014/15.2.3

{"title":"Removal of Pb(II), Zn(II), Sn(II) and Cu(II) Ions from Aqueous Solutions by Linear Alternating Poly(4,4'-biphenol oxalate) Oligomer","authors":"","doi":"10.47014/15.2.3","DOIUrl":"https://doi.org/10.47014/15.2.3","url":null,"abstract":"Poly(4,4′-biphenol oxalate) oligomer was synthesized and characterized by FT-IR, elemental analysis XRD and thermal analysis. The capability of the oligomer to take away Pb(II), Zn(II), Sn(II) and Cu(II) metal ions from aqueous solutions was considered by the known batch and column techniques in terms of concentration, pH value, contact time and temperature. The results indicated that a high initial rate of metal-ion uptake by the oligomer was observed throughout the first 30 minutes, which enlarged slightly amid rising the pH value and then reached its greatest value at pH=5.00 for Pb(II) and Zn(II), pH=4.00 for Cu(II) and pH=6.00 for Sn(II). The oligomer exhibited a high metal-ion uptake capacity to Pb(II) and Zn(II), but a little metal-ion uptake capacity to Cu(II) and Sn(II). Linearized forms of the Langmuir, Freundlich and Dubinin–Radushkevich adsorption isotherms were used to investigate the experimental equilibrium concentration data of Pb(II), Zn(II), Cu(II) and Sn(II). ΔG values demonstrated that the adsorption process of these metal ions on the oligomer is favored while the ΔH values indicated that this process is endothermic. On the other hand, the entropy of the process is positive. In addition to batch experiments, column experiments were performed, where the metal ions were efficiently recovered by treatment of the metal-loaded oligomer with 1.0 M HNO3, 1.0 M HCl and 0.5 M EDTA. The best results were obtained with 1.0 M HNO3 solution.","PeriodicalId":14654,"journal":{"name":"Jordan Journal of Chemistry","volume":" ","pages":""},"PeriodicalIF":0.4,"publicationDate":"2020-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43359943","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Electrical Characterization of E7 Liquid Crystal Molecules under the Impact of an External Electric Field (THz): A Theoretical approach 外电场(THz)作用下E7液晶分子的电特性:一个理论方法

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Jordan Journal of Chemistry Pub Date : 2020-08-01 DOI: 10.47014/15.2.5

Narinder Kumar, Bhavna Pal, Pawan Singh, K. Thapa, Devendra Singh

引用次数: 0

Evaluation of Chitosan Modified by Sodium Dodecyl Sulfate for Removing Hexavalent Chromium from Aqueous Solutions 十二烷基硫酸钠改性壳聚糖去除六价铬的性能评价

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Jordan Journal of Chemistry Pub Date : 2020-03-01 DOI: 10.47014/15.1.2

Ahmad Al Shra’ah

{"title":"Evaluation of Chitosan Modified by Sodium Dodecyl Sulfate for Removing Hexavalent Chromium from Aqueous Solutions","authors":"Ahmad Al Shra’ah","doi":"10.47014/15.1.2","DOIUrl":"https://doi.org/10.47014/15.1.2","url":null,"abstract":"Hexavalent chromium (Cr(VI)) has the characteristic of forming anionic species, which are very toxic, very soluble in water and difficult to be removed. In this study, dichromate removal from aqueous solutions by chitosan and chitosan modified by sodium dodecyl sulfate (SDS) was addressed. The effect of various experimental parameters, such as pH (1-9), initial concentration (10-100 mg L-1), adsorbent dose (0.005-0.350 g) and contact time (5-60 min) was investigated. All experiments were conducted in batch mode at room temperature (~21 oC). The obtained equilibrium adsorption isotherms were analyzed using the Langmuir and Freundlich models. Furthermore, the kinetics of dichromate removal was analyzed by pseudo-first order, pseudo-second order and the Elovich models. Optimum conditions for obtaining high removal (~97%) within a relatively short time (60 min) are: 5.0 pH, 0.100 g SDS-chitosan dosage and an initial Cr2O72- concentration of 10 mg L-1. The dichromate adsorption capacity of chitosan is 8.3 mg L-1, while that of SDS-chitosan is 9.7 mg L-1. In addition, the adsorption of dichromate by chitosan and SDS-chitosan is well-fitted by the Langmuir and Freundlich models while the adsorption kinetics is best fitted by the pseudo-second-order kinetic model.","PeriodicalId":14654,"journal":{"name":"Jordan Journal of Chemistry","volume":" ","pages":""},"PeriodicalIF":0.4,"publicationDate":"2020-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45783905","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Assessment of Heavy Metal Contamination in Roadside Soils along Irbid-Amman Highway, Jordan by ICP-OES ICP-OES法评价约旦伊比德-安曼高速公路路边土壤重金属污染

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Jordan Journal of Chemistry Pub Date : 2020-02-16 DOI: 10.47014/15.1.1

“Ayat Allah” T. Al-Massaedh

{"title":"Assessment of Heavy Metal Contamination in Roadside Soils along Irbid-Amman Highway, Jordan by ICP-OES","authors":"“Ayat Allah” T. Al-Massaedh","doi":"10.47014/15.1.1","DOIUrl":"https://doi.org/10.47014/15.1.1","url":null,"abstract":"In this study, the concentrations of selected heavy metals (Al, Cd, Cr, Cu, Mn, Pb, Co, Fe, Ni, V and Zn) in roadside soil samples were determined by Inductively Coupled Plasma-Optical Emission Spectroscopy (ICP-OES) after microwave digestion. A total of sixty roadside soil samples were collected during July 2018 from seventeen sampling sites (5 km apart) from both sides along Irbid-Amman highway, Jordan. The average concentrations (±SD) of the investigated metals in the analyzed soil samples were found to be 18400 (± 11200), 6.0 (± 4.7), 132 (± 47), 49 (± 26), 695 (± 310), 96 (± 53), 78 (± 32), 31800 (± 12600), 116 (± 67), 141 (± 74) and 129 (± 112) µg/g for Al, Cd, Cr, Cu, Mn, Pb, Co, Fe, Ni, V and Zn, respectively. With exception of Mn, the enrichment factors for the investigated metals in roadside soils were found to be more than 10, indicating anthropogenic sources such as automobile traffic. In the absence of any industrial activities in the sampling sites, the high concentrations of the investigated metals suggest that automobile emissions are the major source of roadside soil pollution. The results obtained in this study showed that metal concentrations in the analyzed soil samples are strongly influenced by the wind direction and traffic density in the investigated area. The higher metal concentrations on the west side of the road were due to the easterly prevailing wind in the studied area. As expected, the concentrations of heavy metals decreased with increasing distance from the edge of the road. The results obtained in this work were compared with the literature values.","PeriodicalId":14654,"journal":{"name":"Jordan Journal of Chemistry","volume":" ","pages":""},"PeriodicalIF":0.4,"publicationDate":"2020-02-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44329973","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

Effects of Milling Time and Speed on Nutrient Availability of KH2PO4 with Kaolinite as Physical Type Slow/Controlled Release Fertilizers 碾磨时间和速度对高岭石为物理型缓控释肥料KH2PO4养分有效性的影响

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Jordan Journal of Chemistry Pub Date : 2020-01-01 DOI: 10.47014/15.2.1

A. Al-Rawajfeh, Mohammad Alrbaihat, E. AlShamaileh

引用次数: 5

Synthesis, Molecular Docking and Evaluation of Hetaryl Fragment Tagged 1H-1,2,4-Triazole Derivatives As Nematicidal Agents Hetaryl片段标记1h -1,2,4-三唑类杀线虫剂的合成、分子对接及评价

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Jordan Journal of Chemistry Pub Date : 1900-01-01 DOI: 10.47014/16.1.1

引用次数: 1

Post-functionalization of Ether-linked Polymer via the Application of Ullmann-coupling Reaction: Synthesis, Characterization and Thermal Degradation Kinetics 应用ullmann偶联反应的醚连接聚合物的后功能化:合成、表征和热降解动力学

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Jordan Journal of Chemistry Pub Date : 1900-01-01 DOI: 10.47014/16.1.3

{"title":"Post-functionalization of Ether-linked Polymer via the Application of Ullmann-coupling Reaction: Synthesis, Characterization and Thermal Degradation Kinetics","authors":"","doi":"10.47014/16.1.3","DOIUrl":"https://doi.org/10.47014/16.1.3","url":null,"abstract":"A new ether-linked polymer (PE-A) was synthesized via the polycondensation of 1,4-dibromo-2,5-difluorobenzene with biphenol (A). The new polymer has shown a good solubility in non-polar solvents, as well as moderate thermal stability (up to 300 °C). The parent PE-A was subjected to post-functionalization modification applying the Ullmann-coupling reaction on the C-Br bonds of PE-A, where the bromo-sites have been replaced by aniline-linked moieties. The resulting polymer (PE-Ani-A) shows slight solubility in several solvents. Its thermal stability was enhanced by 36% when compared with PE-A. To ensure the significant impact of the inclusion of the aniline group on thermal stability, a thermal degradation kinetics study was performed and the Coats-Redfren and Broido theoretical models were applied to explore the degradation process. The calculated activation energy for PE-Ani-A degradation was thereby found to be higher than that of PE-A, which indicates the higher thermal stability of PE-Ani-A. For further insights into the thermal stability of the polymers, the limited oxygen index (LOI), which represents the flame-retardant property of the polymers, was calculated. The results indicate that PE-A is a promising candidate as a flame-retardant polymer (LOI = 46.7), since it has a high bromo-content. On the other hand, PE-Ani-A has a lower LOI although it has a higher thermal stability.","PeriodicalId":14654,"journal":{"name":"Jordan Journal of Chemistry","volume":"1 1","pages":""},"PeriodicalIF":0.4,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70655936","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Green Chemistry: A Simple Manual Apparatus for Potentiometric and Conductometric Micro-Titration of Small Samples for the Educational Laboratory 绿色化学:用于教育实验室小样品电位和电导微滴定的简易手动仪器

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Jordan Journal of Chemistry Pub Date : 1900-01-01 DOI: 10.47014/16.1.2

引用次数: 1