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Removal of Fluoride from Drinking Water Using Protonated Glycerol Diglycidyl Ether Cross-Linked Chitosan Beads 质子化甘油二缩水甘油醚交联壳聚糖微球去除饮用水中的氟化物
IF 0.9
Chemistry & Chemical Technology Pub Date : 2021-06-15 DOI: 10.23939/CHCHT15.02.205
P. N. S. Pathirannehe, T. D. Fernando, C. Rajapakse
{"title":"Removal of Fluoride from Drinking Water Using Protonated Glycerol Diglycidyl Ether Cross-Linked Chitosan Beads","authors":"P. N. S. Pathirannehe, T. D. Fernando, C. Rajapakse","doi":"10.23939/CHCHT15.02.205","DOIUrl":"https://doi.org/10.23939/CHCHT15.02.205","url":null,"abstract":"In this study, physically and chemically modified chitosan; protonated glycerol diglycidyl ether cross-linked chitosan beads (GDCLCB/H+) were prepared and characterized using FTIR and SEM. The optimum defluoridation capacity (DC) of GDCLCB/H+ was observed at the initial F- ion concentration of 15 mg/l, adsorbent dosage of 0.6 g, contact time of 30 min and pH of the solution was in the range of 5–7 at 303 ± 2 K. The equilibrium adsorption data fitted well with Langmuir and Freundlich isotherm models. The maximum adsorption capacity (q0), obtained from Langmuir isotherm for F-adsorption was found to be 2000 mg/kg, which was significantly higher than that of unmodified chitosan (192.3 mg/kg) and most of the chitosan-based sorbents reported in the literature. Water samples collected from Medawachchiya, Sri Lanka, were treated with the adsorbents and the results suggested that GDCLCB/H+ could be used as an effective defluoridation agent.","PeriodicalId":9793,"journal":{"name":"Chemistry & Chemical Technology","volume":"6 1","pages":""},"PeriodicalIF":0.9,"publicationDate":"2021-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78955696","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: 3
Cellulose Acetate Hollow Fiber Membranes from Banana Stem Fibers Coated by TiO2 for Degradation of Waste Textile Dye TiO2包覆香蕉茎纤维醋酸纤维素中空纤维膜降解废纺织染料
IF 0.9
Chemistry & Chemical Technology Pub Date : 2021-06-15 DOI: 10.23939/CHCHT15.02.291
S. Wafiroh, A. Abdulloh, A. A. Widati
{"title":"Cellulose Acetate Hollow Fiber Membranes from Banana Stem Fibers Coated by TiO2 for Degradation of Waste Textile Dye","authors":"S. Wafiroh, A. Abdulloh, A. A. Widati","doi":"10.23939/CHCHT15.02.291","DOIUrl":"https://doi.org/10.23939/CHCHT15.02.291","url":null,"abstract":"Cellulose acetate hollow fiber membrane from banana stem fibers coated by TiO2 (CAHFMT) was prepared and characterized as an alternative material for degradation of waste textile dye. Its applicability was demonstrated by mechanical properties, FTIR, SEM, thermal resistance, performance, and degradation efficiency. Cellulose acetate (CA) was synthesized from banana stem fibers by swelling stage, acetylation reaction, and hydrolysis reaction. CA was modified using TiO2 of various concentrations. CAHFMT with 22 % w/v dope concentration has the optimum mechanical properties (stress, strain and Young’s modulus), as well as hydrophilic properties. The performances of CAHFMT with Congo red were determined. The SEM results showed that the membrane had rigid pores. Moreover, this research stated that CAHFMT could be a solution to overcome economical and effective problems.","PeriodicalId":9793,"journal":{"name":"Chemistry & Chemical Technology","volume":"5 1","pages":""},"PeriodicalIF":0.9,"publicationDate":"2021-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74248000","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: 3
Integrated Regeneration Method for Used Mineral Motor Oils 废旧矿物油的综合再生方法
IF 0.9
Chemistry & Chemical Technology Pub Date : 2021-06-15 DOI: 10.23939/CHCHT15.02.239
B. Korchak, O. Grynyshyn, T. Chervinskyy, A. Nagurskyy, V. Stadnik
{"title":"Integrated Regeneration Method for Used Mineral Motor Oils","authors":"B. Korchak, O. Grynyshyn, T. Chervinskyy, A. Nagurskyy, V. Stadnik","doi":"10.23939/CHCHT15.02.239","DOIUrl":"https://doi.org/10.23939/CHCHT15.02.239","url":null,"abstract":"The scheme of the integrated regeneration method for used mineral motor oils (UMMO) has been developed, according to which M-10DM and NORMAL 15W40 used oils were regenerated. A study on changes in physico-chemical properties, qualitative and elemental composition was carried out, and a mathematical model of the process was built. The further applications of the obtained products were proposed. Based on the obtained results, the technological scheme and flow chart of UMMO integrated regeneration were developed, and the process material balance was calculated.","PeriodicalId":9793,"journal":{"name":"Chemistry & Chemical Technology","volume":"15 1","pages":""},"PeriodicalIF":0.9,"publicationDate":"2021-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91244307","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
Ceramic Protective Coatings for Cordierite-Mullite Refractory Materials 堇青石-莫来石耐火材料陶瓷防护涂层
IF 0.9
Chemistry & Chemical Technology Pub Date : 2021-06-15 DOI: 10.23939/CHCHT15.02.247
O. Vakhula, M. Pona, Solokha Ivan, O. Koziy, M. Petruk
{"title":"Ceramic Protective Coatings for Cordierite-Mullite Refractory Materials","authors":"O. Vakhula, M. Pona, Solokha Ivan, O. Koziy, M. Petruk","doi":"10.23939/CHCHT15.02.247","DOIUrl":"https://doi.org/10.23939/CHCHT15.02.247","url":null,"abstract":"The issue of cordierite-mullite refractories protection from the influence of aggressive factors is considered. The interaction between the components of protective coatings has been studied. It has been investigated that in the systems based on poly(methylphenylsiloxane) filled with magnesium oxide, alumina and quartz sand, the synthesis of cordierite (2MgO•2Al2O3•5SiO2), mullite (3Al2O3•2SiO2) or magnesium aluminate spinel (MgO•Al2O3) is possible. The basic composition of the protective coating, which can be recommended for the protection of cordierite-mullite refractory, is proposed.","PeriodicalId":9793,"journal":{"name":"Chemistry & Chemical Technology","volume":"58 1","pages":""},"PeriodicalIF":0.9,"publicationDate":"2021-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79306112","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
Solid Polymer Electrolyte Membranes on the Basis of Fluorosiloxane Matrix 基于氟硅氧烷基质的固体聚合物电解质膜
IF 0.9
Chemistry & Chemical Technology Pub Date : 2021-06-15 DOI: 10.23939/CHCHT15.02.198
O. Mukbaniani, J. Aneli, T. Tatrishvili, E. Markarashvili
{"title":"Solid Polymer Electrolyte Membranes on the Basis of Fluorosiloxane Matrix","authors":"O. Mukbaniani, J. Aneli, T. Tatrishvili, E. Markarashvili","doi":"10.23939/CHCHT15.02.198","DOIUrl":"https://doi.org/10.23939/CHCHT15.02.198","url":null,"abstract":"Hydrosilylation reactions of 2,4,6,8-tetrahydro-2,4,6,8-tetramethylcyclotetrasiloxane (D4H) with 2,2,3,3,4,4,5,5-octafluoropentyl acrylate at 1:4.2 ratio of initial compounds catalysed by platinum catalysts have been studied and corresponding adduct D4R' has been obtained. Ring opening polymerization of D4R in the presence of dry potassium hydroxide has been carried out and comb-type polymers with 2,2,3,3,4,4,5,5-octafluoropentyl propionate side groups have been obtained. The synthesized product D4R and polymers were analyzed by FTIR, 1H, 13C, and 29Si NMR spectroscopy. The solid polymer electrolyte membranes have been obtained via sol-gel reactions of polymers with tetraethoxysilane doped with lithium trifluoromethylsulfonate (triflat) and lithium bis(trifluorosulfonyl)imide. It has been found that the electric conductivity of the polymer electrolyte membranes at room temperature changes in the range of (1.9•10-6) – (5.9•10-10) S•cm-1.","PeriodicalId":9793,"journal":{"name":"Chemistry & Chemical Technology","volume":"72 1","pages":""},"PeriodicalIF":0.9,"publicationDate":"2021-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77291528","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
Production of Bitumen Modified with Low-Molecular Organic Compounds from Petroleum Residues. 1. Effect of Solvent Nature on the Properties of Petroleum Residues Modified with Folmaldehyde 石油残渣低分子有机化合物改性沥青的制备溶剂性质对甲醛改性石油渣油性能的影响
IF 0.9
Chemistry & Chemical Technology Pub Date : 2021-06-15 DOI: 10.23939/CHCHT15.02.274
M. Bratychak, V. Gunka, Y. Prysiazhnyi, Y. Hrynchuk, Iurii Sidun, Yuriy Demchuk, O. Shyshchak
{"title":"Production of Bitumen Modified with Low-Molecular Organic Compounds from Petroleum Residues. 1. Effect of Solvent Nature on the Properties of Petroleum Residues Modified with Folmaldehyde","authors":"M. Bratychak, V. Gunka, Y. Prysiazhnyi, Y. Hrynchuk, Iurii Sidun, Yuriy Demchuk, O. Shyshchak","doi":"10.23939/CHCHT15.02.274","DOIUrl":"https://doi.org/10.23939/CHCHT15.02.274","url":null,"abstract":"The possibility of petroleum residues (tar and oxidized bitumen) modification with formaldehyde (37 % aqueous solution) has been studied at the temperature of 393±3 K for 3 h in the presence of organic solvent and using hydrochloric acid as a catalyst. Toluene, p-xylene, naphta solvent and n-octane were used as the solvents in the amount of 0–40 wt % relative to the initial material. By means of IR spectroscopy the resin-like compounds affecting the operational properties of petroleum residues have been detected. These compounds are formed as a result of formaldehyde reaction with residue components and solvent molecules.","PeriodicalId":9793,"journal":{"name":"Chemistry & Chemical Technology","volume":"24 1","pages":""},"PeriodicalIF":0.9,"publicationDate":"2021-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74042782","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: 18
Green Polymerization of Vinyl Acetate Using Maghnite-Na+, an Exchanged Montmorillonite Clay, as an Ecologic Catalyst 交换蒙脱土磁铁矿- na +生态催化剂催化醋酸乙烯绿色聚合
IF 0.9
Chemistry & Chemical Technology Pub Date : 2021-06-15 DOI: 10.23939/CHCHT15.02.183
Badia Imene Cherifi, M. Belbachir, S. Bennabi
{"title":"Green Polymerization of Vinyl Acetate Using Maghnite-Na+, an Exchanged Montmorillonite Clay, as an Ecologic Catalyst","authors":"Badia Imene Cherifi, M. Belbachir, S. Bennabi","doi":"10.23939/CHCHT15.02.183","DOIUrl":"https://doi.org/10.23939/CHCHT15.02.183","url":null,"abstract":"In this work, the green polymerization of vinyl acetate is carried out by a new method which consists in the use of clay called Maghnite-Na+ as an ecological catalyst, non-toxic, inexpensive and recyclable by a simple filtration. X-ray diffraction and scanning electron microscopy showed that Maghnite-Na+ is successfully obtained after cationic treatment (sodium) on crude maghnite. It is an effective alternative to replace toxic catalysts such as benzoyl peroxide and azobisisobutyronitrile which are mostly used during the synthesis of polyvinyl acetate (PVAc) making the polymerization reaction less problematic for the environment. The synthesis reaction is less energetic by the use of recycled polyurethane as a container for the reaction mixture and is considered as a renewable material and a good thermal insulator maintaining the temperature of 273 K for 6 h. The reaction in bulk is also preferred to avoid the use of a solvent and therefore to stay in the context of green chemistry. In these conditions, the structure of obtained polymer is established by 1H NMR and 13C NMR. Infrared spectroscopy (FT-IR) was also used to confirm the structure of PVAc. Thermogravimetric analysis showed that it is thermally stable and starts to degrade at 603 K while differential scanning calorimetry showed that this polymer has a glass transition temperature Tg of 323 K.","PeriodicalId":9793,"journal":{"name":"Chemistry & Chemical Technology","volume":"48 1","pages":""},"PeriodicalIF":0.9,"publicationDate":"2021-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88022786","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
Theoretical Studies of DENOx SCR over Cu-, Fe- and Mn-FAU Catalysts Cu-、Fe-和Mn-FAU催化剂上脱硝SCR的理论研究
IF 0.9
Chemistry & Chemical Technology Pub Date : 2021-03-15 DOI: 10.23939/CHCHT15.01.016
Izabela Kurzydym, I. Czekaj
{"title":"Theoretical Studies of DENOx SCR over Cu-, Fe- and Mn-FAU Catalysts","authors":"Izabela Kurzydym, I. Czekaj","doi":"10.23939/CHCHT15.01.016","DOIUrl":"https://doi.org/10.23939/CHCHT15.01.016","url":null,"abstract":"Ab initio calculations based on the density functional theory were used. A cluster model of the faujasite zeolite structure (Al2Si22O66H36) with metal particles adsorbed above the aluminium centres was used. The NO and NH3 adsorption processes, individual and co-adsorption, have been studied over metal nanoparticles bound into zeolite clusters. Several configurations, electronic structure (charges, bond orders) and vibration frequencies have been analyzed to determine feasible pathways for the deNOx reaction. The M2O dimers (M = Cu, Mn or Fe) were considered in relation to the previous studies of iron complexes.","PeriodicalId":9793,"journal":{"name":"Chemistry & Chemical Technology","volume":"49 1","pages":""},"PeriodicalIF":0.9,"publicationDate":"2021-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84074282","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: 3
Influence of Surfactants on Copper-CNTs Electrodeposition 表面活性剂对铜- cnts电沉积的影响
IF 0.9
Chemistry & Chemical Technology Pub Date : 2021-02-15 DOI: 10.23939/CHCHT15.01.125
I. Roslyk, Ganna Stovpchenkoko, G. Galchenko
{"title":"Influence of Surfactants on Copper-CNTs Electrodeposition","authors":"I. Roslyk, Ganna Stovpchenkoko, G. Galchenko","doi":"10.23939/CHCHT15.01.125","DOIUrl":"https://doi.org/10.23939/CHCHT15.01.125","url":null,"abstract":"Influence of different types of surfactants on electrodeposition of copper- and carbon-bearing (graphite, carbon nanotubes (CNTs)) composite powder has been experimentally investigated. The size of powder particles decreased, and corrosion resistance increased when surfactants were added. Addition of cationic surfactant CTAB to the electrolyte with simultaneous ultrasonic treatment for CNTs dispersion gives maximum effect.","PeriodicalId":9793,"journal":{"name":"Chemistry & Chemical Technology","volume":"23 1","pages":""},"PeriodicalIF":0.9,"publicationDate":"2021-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89618511","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: 3
Synthesis, Structure and Properties of the Grafted Peptidomimetic Polymer Brushes Based on Poly(N-methacryloyl-L-proline) 聚n -甲基丙烯酰- l-脯氨酸接枝类肽聚合物刷的合成、结构与性能
IF 0.9
Chemistry & Chemical Technology Pub Date : 2021-02-15 DOI: 10.23939/CHCHT15.01.026
M. Tokareva, Halyna Ohar, S. Tokarev, Yu Stetsyshyn
{"title":"Synthesis, Structure and Properties of the Grafted Peptidomimetic Polymer Brushes Based on Poly(N-methacryloyl-L-proline)","authors":"M. Tokareva, Halyna Ohar, S. Tokarev, Yu Stetsyshyn","doi":"10.23939/CHCHT15.01.026","DOIUrl":"https://doi.org/10.23939/CHCHT15.01.026","url":null,"abstract":"A new approach to synthesis at the aminated glass surface of novel biocompatible polymeric nanolayers consisting of poly(N-methacryloyl-L-proline) brushes has been developed. Formation of the polymer nanolayers has been realized in several stages. At the first stage, the glass surface has been modified by aminosilane (APTEC), afterwards monolayer of the peroxide-containing initiator (PI) based on pyromellitic acid has been tethered to this aminated surface. The immobilized PI has been used further for initiation of the grafting \"from the surface\" polymerization of N-methacryloyl-L-proline for obtaining of the peptidomimetic polymer brushes. Features of the reactions, as well as optimal conditions for performing the process are highlighted in this work. Presented here poly(N-methacryloyl-L-proline) grafted brush coatings are promising material for numerous applications in nanomedicine, especially for production of implants and systems of the controlled interaction with proteins and cells.","PeriodicalId":9793,"journal":{"name":"Chemistry & Chemical Technology","volume":"1 1","pages":""},"PeriodicalIF":0.9,"publicationDate":"2021-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76956147","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: 1
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