Jovana Araskov, Predrag Ristic, Aleksandar Visnjevac, Andrej Milivojac, Dragana Mitic, Nenad Filipovic, Tamara Todorovic
An octahedral complex of Zn(II) with a ligand from a class of pyridine-based 1,3-selenazolyl-hydrazones was synthesized and characterized by IR and NMR spectroscopy and single crystal X-ray diffraction analysis. The purity of the complex was confirmed by elemental analysis. Two ligands are coordinated in the neutral NNN-tridentate form forming a complex cation, while the positive charge is neutralized by [ZnCl4]2-. Complex crystallizes in monoclinic C2/c space group with the Zn atoms situated in a special position. The packing features of the novel complex were analyzed using Hirshfeld surfaces, construction of 2D pseudosymmetric plot and DFT quantum mechanical calculations and compared with the previously published sulfur-based isostere. The key difference in the structures, imposed by replacement of sulfur with selenium, were identified.
{"title":"Zn(II) complex with pyridine based 1,3-selenazolyl-hydrazone: Synthesis, structural characterization and DFT study","authors":"Jovana Araskov, Predrag Ristic, Aleksandar Visnjevac, Andrej Milivojac, Dragana Mitic, Nenad Filipovic, Tamara Todorovic","doi":"10.2298/jsc230831079a","DOIUrl":"https://doi.org/10.2298/jsc230831079a","url":null,"abstract":"An octahedral complex of Zn(II) with a ligand from a class of pyridine-based 1,3-selenazolyl-hydrazones was synthesized and characterized by IR and NMR spectroscopy and single crystal X-ray diffraction analysis. The purity of the complex was confirmed by elemental analysis. Two ligands are coordinated in the neutral NNN-tridentate form forming a complex cation, while the positive charge is neutralized by [ZnCl4]2-. Complex crystallizes in monoclinic C2/c space group with the Zn atoms situated in a special position. The packing features of the novel complex were analyzed using Hirshfeld surfaces, construction of 2D pseudosymmetric plot and DFT quantum mechanical calculations and compared with the previously published sulfur-based isostere. The key difference in the structures, imposed by replacement of sulfur with selenium, were identified.","PeriodicalId":17489,"journal":{"name":"Journal of The Serbian Chemical Society","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135008719","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Marijana Kostic, Marko Rodic, Ljiljana Vojinovic-Jesic, Mirjana Radanovic
Here we report a new Schiff base of aminoguanidine and 2,3- dihydroxybenzaldehyde (H2L) and its physicochemical characterization, along with an investigation into its coordination affinities towards zinc. By reacting zinc acetate with the chloride salt of the ligand in the MeCN-H2O solution, yellow single-crystals of tetranuclear, centrosymmetric complex, with the formula [Zn2(?-L)(?-OAc)2]2?2MeCN, were obtained. The complex was characterized by IR spectroscopy, conductometry, elemental analysis, and single-crystal X-ray diffraction analysis. Notably, both nitrogen atoms of the aminoguanidine residue coordinate to the same zinc atom, while both deprotonated phenyl oxygen atoms achieve bridging coordination. Furthermore, two acetate anions bridge adjacent zinc atoms in addition to the Schiff base anion. Meaningful insights into the hierarchy and significance of intermolecular interactions within the crystal structure were gained by estimating the energies using the CrystalExplorer model. The calculations revealed that the crystal structure can be classified as a layer type, with notably stronger interactions occurring along the [0 0 1] and [0 1 1] directions.
{"title":"Synthesis and structural analysis of tetranuclear Zn(II) complex with 2,3-dihydroxybenzaldehyde-aminoguanidine","authors":"Marijana Kostic, Marko Rodic, Ljiljana Vojinovic-Jesic, Mirjana Radanovic","doi":"10.2298/jsc230808067k","DOIUrl":"https://doi.org/10.2298/jsc230808067k","url":null,"abstract":"Here we report a new Schiff base of aminoguanidine and 2,3- dihydroxybenzaldehyde (H2L) and its physicochemical characterization, along with an investigation into its coordination affinities towards zinc. By reacting zinc acetate with the chloride salt of the ligand in the MeCN-H2O solution, yellow single-crystals of tetranuclear, centrosymmetric complex, with the formula [Zn2(?-L)(?-OAc)2]2?2MeCN, were obtained. The complex was characterized by IR spectroscopy, conductometry, elemental analysis, and single-crystal X-ray diffraction analysis. Notably, both nitrogen atoms of the aminoguanidine residue coordinate to the same zinc atom, while both deprotonated phenyl oxygen atoms achieve bridging coordination. Furthermore, two acetate anions bridge adjacent zinc atoms in addition to the Schiff base anion. Meaningful insights into the hierarchy and significance of intermolecular interactions within the crystal structure were gained by estimating the energies using the CrystalExplorer model. The calculations revealed that the crystal structure can be classified as a layer type, with notably stronger interactions occurring along the [0 0 1] and [0 1 1] directions.","PeriodicalId":17489,"journal":{"name":"Journal of The Serbian Chemical Society","volume":"66 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135550339","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Tina Andrejevic, Darko Asanin, Aurélien Crochet, Nevena Stevanovic, Ivana Vucenovic, Fabio Zobi, Milos Djuran, Biljana Glisic
In the present study, a zinc(II) complex with 4-ethynyl-2,2?-bipyridine (ebpy), [Zn(ebpy)Cl2], was synthesized and characterized by spectroscopic (1H NMR, IR and UV-Vis) methods and molar conductivity measurement. The crystal structure of the [Zn(ebpy)Cl2] complex was determined by single-crystal X-ray diffraction analysis, confirming the bidentate coordination of the ebpy ligand through its two nitrogen atoms, while the remaining two coordination sites are occupied by two chloride ions. With the aim to investigate the reactivity of the synthesized zinc(II) complex toward biologically important molecules, its binding affinity to calf thymus DNA (ct-DNA) and bovine serum albumin (BSA) was studied by fluorescence emission spectroscopy. From the obtained results, it can be concluded that [Zn(ebpy)Cl2] complex binds to BSA reversibly, while the combination of ethidium bromide (EthBr) and Hoechst 33258 (2?-(4-hydroxyphenyl)-5-[5-(4-methylpiperazine- 1-yl)benzimidazo-2-yl]-benzimidazole) competitive binding study suggests that this complex interacts with ct-DNA through the minor groove binding, which is in agreement with molecular docking study.
{"title":"Structure and DNA/BSA binding study of zinc(II) complex with 4-ethynyl-2,2’-bipyridine","authors":"Tina Andrejevic, Darko Asanin, Aurélien Crochet, Nevena Stevanovic, Ivana Vucenovic, Fabio Zobi, Milos Djuran, Biljana Glisic","doi":"10.2298/jsc230605066a","DOIUrl":"https://doi.org/10.2298/jsc230605066a","url":null,"abstract":"In the present study, a zinc(II) complex with 4-ethynyl-2,2?-bipyridine (ebpy), [Zn(ebpy)Cl2], was synthesized and characterized by spectroscopic (1H NMR, IR and UV-Vis) methods and molar conductivity measurement. The crystal structure of the [Zn(ebpy)Cl2] complex was determined by single-crystal X-ray diffraction analysis, confirming the bidentate coordination of the ebpy ligand through its two nitrogen atoms, while the remaining two coordination sites are occupied by two chloride ions. With the aim to investigate the reactivity of the synthesized zinc(II) complex toward biologically important molecules, its binding affinity to calf thymus DNA (ct-DNA) and bovine serum albumin (BSA) was studied by fluorescence emission spectroscopy. From the obtained results, it can be concluded that [Zn(ebpy)Cl2] complex binds to BSA reversibly, while the combination of ethidium bromide (EthBr) and Hoechst 33258 (2?-(4-hydroxyphenyl)-5-[5-(4-methylpiperazine- 1-yl)benzimidazo-2-yl]-benzimidazole) competitive binding study suggests that this complex interacts with ct-DNA through the minor groove binding, which is in agreement with molecular docking study.","PeriodicalId":17489,"journal":{"name":"Journal of The Serbian Chemical Society","volume":"81 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135550599","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Berta Barta Holló, Niloofar Bayat, Laura Bereczki, Vladimir Petrusevski, Kende Béres, Attila Farkas, Imre Szilágyi, László Kótai
Structural and spectroscopic characterization (SXRD, IR, liq. N2 temperature Raman, UV) of hexaamminecobalt(III) dibromide permanganate, [Co(NH3)6]Br2(MnO4) (compound 1) are described. There is a 3D hydrogen bond network including N-H???O-Mn and N-H???Br interactions, which could serve as potential reaction centers for solid-phase redox reactions between the ammonia ligands and/or bromide ions as reductants and permanganate ions as oxidant agents. The effect of the nature of halogen ions on the structural and spectroscopic properties of [Co(NH3)6]Br2(MnO4) and the analogous chloride compound, [Co(NH3)6]Cl2(MnO4) (compound 2) are discussed in detail.
{"title":"Spectroscopic and structural characterization of hexaamminecobalt(III) dibromide permanganate","authors":"Berta Barta Holló, Niloofar Bayat, Laura Bereczki, Vladimir Petrusevski, Kende Béres, Attila Farkas, Imre Szilágyi, László Kótai","doi":"10.2298/jsc230702062b","DOIUrl":"https://doi.org/10.2298/jsc230702062b","url":null,"abstract":"Structural and spectroscopic characterization (SXRD, IR, liq. N2 temperature Raman, UV) of hexaamminecobalt(III) dibromide permanganate, [Co(NH3)6]Br2(MnO4) (compound 1) are described. There is a 3D hydrogen bond network including N-H???O-Mn and N-H???Br interactions, which could serve as potential reaction centers for solid-phase redox reactions between the ammonia ligands and/or bromide ions as reductants and permanganate ions as oxidant agents. The effect of the nature of halogen ions on the structural and spectroscopic properties of [Co(NH3)6]Br2(MnO4) and the analogous chloride compound, [Co(NH3)6]Cl2(MnO4) (compound 2) are discussed in detail.","PeriodicalId":17489,"journal":{"name":"Journal of The Serbian Chemical Society","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135595749","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Jovana Buha-Markovic, Ana Marinkovic, J. Savić, Aleksa Krstić, A. Savic, M. Ristić
Lignite and coal waste used as feed fuels in thermal power plants (TPPs) and semi-industrial fluidized bed boiler (FBB), as well as their representative fly ashes (FAs), were examined. Fly ashes were compared employing anions and cations content in correspondent water extracts, trace elements and polycyclic aromatic hydrocarbon concentrations, as well as health risk assessments of substances known to be of concern for public health. Fluoride and sulfate contents in water extracted FAs are far below the legislation limits for waste, classifying all investigated FAs as non-hazardous. Among investigated trace elements, Cd content is the lowest, while Mn content is the highest. The highest enrichment ratios are noticed for As, Pb, Hg, Cu, V and Cr. The results indicate that total PAHs content is elevated in FA from the combustion of coal waste (AFB), with fluoranthene prevailing. The cancer risk of As and the non-cancer risk of As and Ni in some FAs surpass their respective permissible limits. The incremental lifetime cancer risk of an adult population indicates a potential PAHs risk in AFB, whereas all other fly ashes are within safe limits.
{"title":"Health risk assessment of potentially harmful substances from fly ashes generated by coal and coal waste combustion","authors":"Jovana Buha-Markovic, Ana Marinkovic, J. Savić, Aleksa Krstić, A. Savic, M. Ristić","doi":"10.2298/jsc220130048m","DOIUrl":"https://doi.org/10.2298/jsc220130048m","url":null,"abstract":"Lignite and coal waste used as feed fuels in thermal power plants (TPPs) and semi-industrial fluidized bed boiler (FBB), as well as their representative fly ashes (FAs), were examined. Fly ashes were compared employing anions and cations content in correspondent water extracts, trace elements and polycyclic aromatic hydrocarbon concentrations, as well as health risk assessments of substances known to be of concern for public health. Fluoride and sulfate contents in water extracted FAs are far below the legislation limits for waste, classifying all investigated FAs as non-hazardous. Among investigated trace elements, Cd content is the lowest, while Mn content is the highest. The highest enrichment ratios are noticed for As, Pb, Hg, Cu, V and Cr. The results indicate that total PAHs content is elevated in FA from the combustion of coal waste (AFB), with fluoranthene prevailing. The cancer risk of As and the non-cancer risk of As and Ni in some FAs surpass their respective permissible limits. The incremental lifetime cancer risk of an adult population indicates a potential PAHs risk in AFB, whereas all other fly ashes are within safe limits.","PeriodicalId":17489,"journal":{"name":"Journal of The Serbian Chemical Society","volume":"58 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68513313","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The structure, conductivity, melting points and caloric melting effects of the (Li2CO3-Na2CO3-K2CO3)eut melt/MgO nanopowder heterogeneous system with MgO concentration up to 70 vol % have been investigated. A wide variety of methods (DSC, XRD, BET, high resolution scanning electron microscope, AC impedance method, IR and Raman spectroscopy) were used to evaluate samples and research. It is revealed that at the values of effective thickness of the salt phase interlayer between MgO particles below 100 nm there is an abrupt decrease in the melting points of the salt and the normalized phase transition enthalpy of the heterogeneous system. The activation energy of the electrical conductivity rises as the values of effective thickness of the melt phase interlayer between MgO particles decreases. The study established the lack of any chemical interaction between MgO and carbonate melt at 400-600??. In situ Raman spectroscopy of the (Li2CO3-Na2CO3-K2CO3)eut melt/MgO nanopowder systems revealed the solvation of solid particles by salt-melt ions.
{"title":"Physicochemical properties of the heterogeneous system Li2CO3-Na2CO3-K2CO3/MgO","authors":"I. Zakiryanova, E. Nikolaeva, I. Korzun","doi":"10.2298/jsc230201023z","DOIUrl":"https://doi.org/10.2298/jsc230201023z","url":null,"abstract":"The structure, conductivity, melting points and caloric melting effects of the (Li2CO3-Na2CO3-K2CO3)eut melt/MgO nanopowder heterogeneous system with MgO concentration up to 70 vol % have been investigated. A wide variety of methods (DSC, XRD, BET, high resolution scanning electron microscope, AC impedance method, IR and Raman spectroscopy) were used to evaluate samples and research. It is revealed that at the values of effective thickness of the salt phase interlayer between MgO particles below 100 nm there is an abrupt decrease in the melting points of the salt and the normalized phase transition enthalpy of the heterogeneous system. The activation energy of the electrical conductivity rises as the values of effective thickness of the melt phase interlayer between MgO particles decreases. The study established the lack of any chemical interaction between MgO and carbonate melt at 400-600??. In situ Raman spectroscopy of the (Li2CO3-Na2CO3-K2CO3)eut melt/MgO nanopowder systems revealed the solvation of solid particles by salt-melt ions.","PeriodicalId":17489,"journal":{"name":"Journal of The Serbian Chemical Society","volume":"1 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68516841","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The present work describes the synthesis of a new class of glycolipids with systematic variation in the linkage region as well as in the aglycon part using Cu(I) catalyzed click reaction. The linkage region between sugar and the aglycon part was diversified using amide, amido-triazole, and 5-benzoyl triazole moieties. The structural diversity of glycolipids was further amplified by incorporating several polar peptide foldamer groups such as triazole, amide, peptide, or N-aryl peptoid in the aglycon part of it. The newly designed glycolipids were derived from the amalgamation of different peptide bond mimics. This work reports the first use of N-aryl peptoid in the synthesis of glycolipids. The newly synthesized glycolipids were characterized using different spectroscopic and spectrometric analyses. The impact of the amide bond as well as the triazole ring in the linkage region on the morphology of the glycolipids was analyzed by comparing their self-assembly using SEM analysis. The geometries of the glycolipids were also optimized using density functional theory and the optimized structures were found to be minima in the potential energy surfaces.
{"title":"Click mediated synthesis of functionalized glycolipids with peptide-peptoid linkages","authors":"Anadi Singhamahapatra, Chinmayee Pattnaik, Prasad Kar, Chandra Nayak, Narayan Sahoo, Satyanarayan Sahoo","doi":"10.2298/jsc230201030s","DOIUrl":"https://doi.org/10.2298/jsc230201030s","url":null,"abstract":"The present work describes the synthesis of a new class of glycolipids with systematic variation in the linkage region as well as in the aglycon part using Cu(I) catalyzed click reaction. The linkage region between sugar and the aglycon part was diversified using amide, amido-triazole, and 5-benzoyl triazole moieties. The structural diversity of glycolipids was further amplified by incorporating several polar peptide foldamer groups such as triazole, amide, peptide, or N-aryl peptoid in the aglycon part of it. The newly designed glycolipids were derived from the amalgamation of different peptide bond mimics. This work reports the first use of N-aryl peptoid in the synthesis of glycolipids. The newly synthesized glycolipids were characterized using different spectroscopic and spectrometric analyses. The impact of the amide bond as well as the triazole ring in the linkage region on the morphology of the glycolipids was analyzed by comparing their self-assembly using SEM analysis. The geometries of the glycolipids were also optimized using density functional theory and the optimized structures were found to be minima in the potential energy surfaces.","PeriodicalId":17489,"journal":{"name":"Journal of The Serbian Chemical Society","volume":"33 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68516850","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Ceren Kaya, O. Bayındır, Saruhan Saklar, O. Atakol, Hüseyin Çelikkan
The coating of aluminum nitride (AlN) powder has a great importance industrially and environmentally. AlN can be rapidly hydrolyzed to aluminum hydroxide and ammonia in the atmosphere or water media. To prevent the hydrolysis of AlN, the inorganic or organic based coatings are used frequently. First time, in this study, the phosphate esters as organophosphate coating were used for the inhibition of hydrolysis reaction of AlN in its water suspension. Phenyl phosphate showed the best inhibition against AlN hydrolysis with an easy application technique and as low as 0.005 M diluted concentration. AlN coating efficiency was proved by spectroscopic and imaging methods. It was concluded that the coating acquired the protective properties of phenyl phosphate through its water repellence.
{"title":"Preventing hydrolysis of AlN powders with organophosphate coating in aqueous media","authors":"Ceren Kaya, O. Bayındır, Saruhan Saklar, O. Atakol, Hüseyin Çelikkan","doi":"10.2298/jsc230321029k","DOIUrl":"https://doi.org/10.2298/jsc230321029k","url":null,"abstract":"The coating of aluminum nitride (AlN) powder has a great importance industrially and environmentally. AlN can be rapidly hydrolyzed to aluminum hydroxide and ammonia in the atmosphere or water media. To prevent the hydrolysis of AlN, the inorganic or organic based coatings are used frequently. First time, in this study, the phosphate esters as organophosphate coating were used for the inhibition of hydrolysis reaction of AlN in its water suspension. Phenyl phosphate showed the best inhibition against AlN hydrolysis with an easy application technique and as low as 0.005 M diluted concentration. AlN coating efficiency was proved by spectroscopic and imaging methods. It was concluded that the coating acquired the protective properties of phenyl phosphate through its water repellence.","PeriodicalId":17489,"journal":{"name":"Journal of The Serbian Chemical Society","volume":"1 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68517213","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
U. Marceta, M. Vučinić-Vasić, Jordana Ninkov, Strahinja Ilic, B. Vujic
Four monitoring campaigns of sedimentable dust were provided from two large non-sanitary landfills (Zrenjanin and Novi Sad) in Serbia during 2021. Particle size analysis by laser diffraction and inductively coupled plasma - optical emission spectrometry (ICP-OES) were carried out in order to obtain particle size distribution (PSD) and toxic elements (TEs) concentrations. The health risk assessment of the landfill employees was performed according to United States Environmental Protection Agency (US EPA) methods based on TEs concentrations. The particle size distribution results demonstrated that the majority of sedimentable dust samples mass were not concentrated neither within PM2.5 neither within PM10 fraction. Analysis revealed high concentration of TEs at both landfills: an extremely high concentration of Cr and Zn in samples from Zrenjanin landfill was detected. Health risk potential of elements was as follows for both landfills: Cr > Co > Pb > Ni > Zn > Cu. According to the results, maximal hazard index (HI) for landfill employees in Zrenjanin (1.97*10-1) and Novi Sad (1.13*10-1) showed that non-cancer risk was very low. For both landfill sites, cancer risk (CR) was highest for Cr (2.75*10-5 for Zrenjanin and 2.02*10-7 for Novi Sad), though still within the defined threshold for tolerable cancer risk.
2021年期间，从塞尔维亚的两个大型非卫生垃圾填埋场(Zrenjanin和Novi Sad)开展了四次可沉积粉尘监测活动。采用激光衍射和电感耦合等离子体-光学发射光谱(ICP-OES)分析了样品的粒径分布(PSD)和有毒元素(TEs)浓度。根据美国环境保护署(EPA)基于TEs浓度的方法对垃圾填埋场工作人员进行了健康风险评估。粒径分布结果表明，大部分可沉降尘样品质量既不集中在PM2.5范围内，也不集中在PM10范围内。分析显示，两个垃圾填埋场的TEs浓度都很高:在Zrenjanin垃圾填埋场的样品中检测到极高浓度的Cr和Zn。两个填埋场的元素健康风险潜势如下:Cr > Co > Pb > Ni > Zn > Cu。结果表明，Zrenjanin和Novi Sad的最大危害指数(HI)分别为1.97*10-1和1.13*10-1，非癌风险极低。对于这两个垃圾填埋场，CR的癌症风险(CR)最高(Zrenjanin为2.75*10-5,Novi Sad为2.02*10-7)，尽管仍在规定的可耐受癌症风险阈值之内。
{"title":"Health risk assessment of toxic elements in sedimentable dust from landfills","authors":"U. Marceta, M. Vučinić-Vasić, Jordana Ninkov, Strahinja Ilic, B. Vujic","doi":"10.2298/jsc230413032m","DOIUrl":"https://doi.org/10.2298/jsc230413032m","url":null,"abstract":"Four monitoring campaigns of sedimentable dust were provided from two large non-sanitary landfills (Zrenjanin and Novi Sad) in Serbia during 2021. Particle size analysis by laser diffraction and inductively coupled plasma - optical emission spectrometry (ICP-OES) were carried out in order to obtain particle size distribution (PSD) and toxic elements (TEs) concentrations. The health risk assessment of the landfill employees was performed according to United States Environmental Protection Agency (US EPA) methods based on TEs concentrations. The particle size distribution results demonstrated that the majority of sedimentable dust samples mass were not concentrated neither within PM2.5 neither within PM10 fraction. Analysis revealed high concentration of TEs at both landfills: an extremely high concentration of Cr and Zn in samples from Zrenjanin landfill was detected. Health risk potential of elements was as follows for both landfills: Cr > Co > Pb > Ni > Zn > Cu. According to the results, maximal hazard index (HI) for landfill employees in Zrenjanin (1.97*10-1) and Novi Sad (1.13*10-1) showed that non-cancer risk was very low. For both landfill sites, cancer risk (CR) was highest for Cr (2.75*10-5 for Zrenjanin and 2.02*10-7 for Novi Sad), though still within the defined threshold for tolerable cancer risk.","PeriodicalId":17489,"journal":{"name":"Journal of The Serbian Chemical Society","volume":"1 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68517446","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
M. Stjepanović, A. Janković, B. Vulovic, R. Matovic, R. Saicic
The synthesis of an angular triquinane, which could serve as a suitable platform for the synthesis of several natural products (panaginsene, silphinene, senoxydene) is described. The synthesis is based on two consecutive cyclopentene annulations, where alkenes were used as latent carbonyl functionalities (via Wacker reaction), and cyclopentenone annulation was effected by aldol condensation.
{"title":"Synthetic study on the angular triquinanes","authors":"M. Stjepanović, A. Janković, B. Vulovic, R. Matovic, R. Saicic","doi":"10.2298/jsc230627046s","DOIUrl":"https://doi.org/10.2298/jsc230627046s","url":null,"abstract":"The synthesis of an angular triquinane, which could serve as a suitable platform for the synthesis of several natural products (panaginsene, silphinene, senoxydene) is described. The synthesis is based on two consecutive cyclopentene annulations, where alkenes were used as latent carbonyl functionalities (via Wacker reaction), and cyclopentenone annulation was effected by aldol condensation.","PeriodicalId":17489,"journal":{"name":"Journal of The Serbian Chemical Society","volume":"42 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68517467","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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