Pub Date : 2023-12-01DOI: 10.52215/rev.bgs.2023.84.3.201
Millena Vetseva, A. Hikov, D. Dochev, Yavor Stefanov
The Turonian nodular phosphate-bearing bed outcropping near Kaspichan consists of early diagenetically mineralized (carbonate-fluorapatite – CFA, glauconite and goethite) limestone lithoclasts (nodules), mineralized macrofauna, and non-mineralized intraclasts, embedded in a glauconite-CFA cement. The characteristics of the nodular bed are consistent with a formation under extremely low net sedimentation rate with nodules demonstrating evidence for reworking. The identified ammonite association assigns late Turonian age of the bed. XRF and LA-ICPMS analyses reveal low P, U, and REE-Y concentrations, with correlations between REE and the other authigenic oxides indicating that glauconite and goethite could be main REE concentrators along with CFA. Fluctuations in the redox conditions are implied by the authigenic mineral association, mineralization stages, presence of diverse fauna and ichnofissils, and applied geochemical proxies.
{"title":"New data on the Turonian nodular phosphate-bearing bed in the Dobrindol Formation south of Kaspichan, NE Bulgaria","authors":"Millena Vetseva, A. Hikov, D. Dochev, Yavor Stefanov","doi":"10.52215/rev.bgs.2023.84.3.201","DOIUrl":"https://doi.org/10.52215/rev.bgs.2023.84.3.201","url":null,"abstract":"The Turonian nodular phosphate-bearing bed outcropping near Kaspichan consists of early diagenetically mineralized (carbonate-fluorapatite – CFA, glauconite and goethite) limestone lithoclasts (nodules), mineralized macrofauna, and non-mineralized intraclasts, embedded in a glauconite-CFA cement. The characteristics of the nodular bed are consistent with a formation under extremely low net sedimentation rate with nodules demonstrating evidence for reworking. The identified ammonite association assigns late Turonian age of the bed. XRF and LA-ICPMS analyses reveal low P, U, and REE-Y concentrations, with correlations between REE and the other authigenic oxides indicating that glauconite and goethite could be main REE concentrators along with CFA. Fluctuations in the redox conditions are implied by the authigenic mineral association, mineralization stages, presence of diverse fauna and ichnofissils, and applied geochemical proxies.","PeriodicalId":509487,"journal":{"name":"Review of the Bulgarian Geological Society","volume":"53 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139193503","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}
Pub Date : 2023-12-01DOI: 10.52215/rev.bgs.2023.84.3.189
P. Pavlishina, D. Dochev
A dinoflagellate cyst biostratigraphy for the upper Campanian–lower Maastrichtian interval in the newly described Oslen-Krivodol section, northwest Bulgaria, is proposed. The dinocyst scheme comprises the zones of Areoligera coronata and Cerodinium diebelii, in ascending order, and illustrates the sharp transition between the Campanian and Maastrichtian dinocyst assemblages. The presented results confirm the high potential of dinoflagellate cysts for biostratigraphic correlations in the Campanian–Maastrichtian boundary interval.
{"title":"Dinoflagellate cyst biostratigraphy of the upper Campanian–lower Maastrichtian interval in the Oslen-Krivodol section, Northwest Bulgaria: preliminary results","authors":"P. Pavlishina, D. Dochev","doi":"10.52215/rev.bgs.2023.84.3.189","DOIUrl":"https://doi.org/10.52215/rev.bgs.2023.84.3.189","url":null,"abstract":"A dinoflagellate cyst biostratigraphy for the upper Campanian–lower Maastrichtian interval in the newly described Oslen-Krivodol section, northwest Bulgaria, is proposed. The dinocyst scheme comprises the zones of Areoligera coronata and Cerodinium diebelii, in ascending order, and illustrates the sharp transition between the Campanian and Maastrichtian dinocyst assemblages. The presented results confirm the high potential of dinoflagellate cysts for biostratigraphic correlations in the Campanian–Maastrichtian boundary interval.","PeriodicalId":509487,"journal":{"name":"Review of the Bulgarian Geological Society","volume":"24 26","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139193871","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}
Pub Date : 2023-12-01DOI: 10.52215/rev.bgs.2023.84.3.159
I. Gerdjikov, D. Vangelov
Southwestern slopes of Rila Mountain and northern parts of the Mesta graben are one of the least studied areas in terms of brittle tectonics. We carried out studies in the area around Bachevo and Dobarsko villages aiming to observe the fault zone network. The Bachevo fault zone is defined as Paleogene–Eocene Low-Angle Normal Fault that later underwent strike-slip and normal fault reactivation. The zone is an important tectonic boundary, separating the ca. 56 Ma Kapatnik granite from the Ograzhden Unit. Another important and possibly younger extensional zone is the Semkovo Fault. The relationships between the both zones are unclear. In terms of the Quaternary tectonics, it is important to differentiate between the Semkovo fault and the active Southeastern Rila Normal Fault. There are no data about Quaternary activity of the Bachevo fault zone.
里拉山西南坡和梅斯塔地堑北部地区是脆性构造研究最少的地区之一。我们在巴切沃（Bachevo）和多巴尔斯科（Dobarsko）村周围地区进行了研究，旨在观察断层带网络。巴切沃断层带被定义为古新世低角度正断层，后来经历了走向滑动和正断层的重新激活。该断层带是一个重要的构造边界，将约 56 Ma 的卡帕特尼克花岗岩分隔开来。56 Ma 的卡帕特尼克花岗岩与奥格拉日登单元之间的重要构造边界。另一个重要且可能更年轻的延伸带是塞姆科沃断层。这两个地带之间的关系尚不清楚。就第四纪构造而言，必须区分 Semkovo 断层和活跃的东南里拉正断层。没有关于巴切沃断层带第四纪活动的数据。
{"title":"The fault network in the southern foot of Rila Mountains, SW BulgariaThe fault network in the southern foot of Rila Mountains, SW Bulgaria","authors":"I. Gerdjikov, D. Vangelov","doi":"10.52215/rev.bgs.2023.84.3.159","DOIUrl":"https://doi.org/10.52215/rev.bgs.2023.84.3.159","url":null,"abstract":"Southwestern slopes of Rila Mountain and northern parts of the Mesta graben are one of the least studied areas in terms of brittle tectonics. We carried out studies in the area around Bachevo and Dobarsko villages aiming to observe the fault zone network. The Bachevo fault zone is defined as Paleogene–Eocene Low-Angle Normal Fault that later underwent strike-slip and normal fault reactivation. The zone is an important tectonic boundary, separating the ca. 56 Ma Kapatnik granite from the Ograzhden Unit. Another important and possibly younger extensional zone is the Semkovo Fault. The relationships between the both zones are unclear. In terms of the Quaternary tectonics, it is important to differentiate between the Semkovo fault and the active Southeastern Rila Normal Fault. There are no data about Quaternary activity of the Bachevo fault zone.","PeriodicalId":509487,"journal":{"name":"Review of the Bulgarian Geological Society","volume":"22 10","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139189283","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}
Pub Date : 2023-12-01DOI: 10.52215/rev.bgs.2023.84.3.81
P. Filipov
New findings of monzogabbro and gabbro-monzodiorite dykes aged 62 Ma reveal the existence of magmatism in the gap between termination of the Late Cretaceous subduction-related and start of the early–middle Eocene post-collisional magmatic stages in the Rhodope Massif. Their geochemical compositions strongly resemble adakitic signature as well as hornblende and epidote geobarometers predicted lower crustal conditions (20–30 km depth) of crystallization. Detailed studies on U-Pb geochronology of zircon populations and Sr-Nd-Hf isotopic compositions point to significant assimilation of the local basement and mixing of mantle-crust sources in the regime of a thickened crust.
年龄为 62 Ma 的单斜辉长岩和辉长岩-单斜辉长岩岩体的新发现揭示了罗多彼山丘在晚白垩世俯冲相关阶段结束与早中新世碰撞后岩浆阶段开始之间的岩浆活动。它们的地球化学成分与阿达克特特征以及角闪石和榍石测地仪预测的低地壳结晶条件（20-30 千米深度）十分相似。对锆石群的 U-Pb 地球年代学和 Sr-Nd-Hf 同位素组成的详细研究表明，在地壳增厚的情况下，当地基底和地幔-地壳源混合的同化作用显著。
{"title":"Mafic adakite-like magmatism at the Cretaceous–Paleogene boundary from the Northwest Rhodopes, Bulgaria","authors":"P. Filipov","doi":"10.52215/rev.bgs.2023.84.3.81","DOIUrl":"https://doi.org/10.52215/rev.bgs.2023.84.3.81","url":null,"abstract":"New findings of monzogabbro and gabbro-monzodiorite dykes aged 62 Ma reveal the existence of magmatism in the gap between termination of the Late Cretaceous subduction-related and start of the early–middle Eocene post-collisional magmatic stages in the Rhodope Massif. Their geochemical compositions strongly resemble adakitic signature as well as hornblende and epidote geobarometers predicted lower crustal conditions (20–30 km depth) of crystallization. Detailed studies on U-Pb geochronology of zircon populations and Sr-Nd-Hf isotopic compositions point to significant assimilation of the local basement and mixing of mantle-crust sources in the regime of a thickened crust.","PeriodicalId":509487,"journal":{"name":"Review of the Bulgarian Geological Society","volume":"36 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139195002","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}
Pub Date : 2023-12-01DOI: 10.52215/rev.bgs.2023.84.3.97
Milena Georgieva, Tzvetomila Vladinova
We present new data on the geochemistry of rutiles from metamorphic rock of the Asenitsa and Arda Units, Central Rhodope Massif, Bulgaria. Trace elements in studied rutiles show large variations that depend on protolith type (metapelites and metabasites), metamorphic grade, the rock geochemistry and mineral association. Zr-in-rutile thermometry distinguishes the rutiles from both units with higher temperatures (650–750 °C) for the Arda Unit and lower temperatures (520–630 °C) for the Asenitsa Unit. The uranium content of most rutiles is too low (<0.5 ppm) for U-Pb dating.
{"title":"Geochemistry of rutiles from metamorphic rocks of Asenitsa and Arda Units, Central Rhodope, Bulgaria – preliminary results","authors":"Milena Georgieva, Tzvetomila Vladinova","doi":"10.52215/rev.bgs.2023.84.3.97","DOIUrl":"https://doi.org/10.52215/rev.bgs.2023.84.3.97","url":null,"abstract":"We present new data on the geochemistry of rutiles from metamorphic rock of the Asenitsa and Arda Units, Central Rhodope Massif, Bulgaria. Trace elements in studied rutiles show large variations that depend on protolith type (metapelites and metabasites), metamorphic grade, the rock geochemistry and mineral association. Zr-in-rutile thermometry distinguishes the rutiles from both units with higher temperatures (650–750 °C) for the Arda Unit and lower temperatures (520–630 °C) for the Asenitsa Unit. The uranium content of most rutiles is too low (<0.5 ppm) for U-Pb dating.","PeriodicalId":509487,"journal":{"name":"Review of the Bulgarian Geological Society","volume":"24 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139190277","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}
Pub Date : 2023-12-01DOI: 10.52215/rev.bgs.2023.84.3.311
Nikolay Stoyanov
A general methodological approach is proposed for the preliminary assessment of the potential impact on groundwater during the operation of quarries for aggregates. The practical application and effectiveness of this approach are by using a numerical model to predict groundwater and soil contamination during the implementation of a project in the region of Breznik, Western Bulgaria. The spread of highly mobile pollutants in both the unsaturated and saturated zones of the rock complex is simulated after emergency spills and prolonged discharges of contaminated water in the quarry area. The forecast is made for a period of 100 years. The numerical model was compiled using the VS2DI program.
{"title":"Model based impact assessment on groundwater vulnerability during aggregate quarry operation","authors":"Nikolay Stoyanov","doi":"10.52215/rev.bgs.2023.84.3.311","DOIUrl":"https://doi.org/10.52215/rev.bgs.2023.84.3.311","url":null,"abstract":"A general methodological approach is proposed for the preliminary assessment of the potential impact on groundwater during the operation of quarries for aggregates. The practical application and effectiveness of this approach are by using a numerical model to predict groundwater and soil contamination during the implementation of a project in the region of Breznik, Western Bulgaria. The spread of highly mobile pollutants in both the unsaturated and saturated zones of the rock complex is simulated after emergency spills and prolonged discharges of contaminated water in the quarry area. The forecast is made for a period of 100 years. The numerical model was compiled using the VS2DI program.","PeriodicalId":509487,"journal":{"name":"Review of the Bulgarian Geological Society","volume":"2 5","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139193126","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}
Pub Date : 2023-12-01DOI: 10.52215/rev.bgs.2023.84.3.193
S. Petrova, P. Andreeva, I. Lakova
The upper Tithonian and the lower Berriasian in the Western Fore-Balkan in Bulgaria (Gintsi and Glozhene Formations) represent a remarkable, stratigraphically expanded record of pelagic nodular and micritic limestones. More than 50 studied thin sections revealed the succession of the Chitinoidella, Praetintinnopsella, Crassicollaria, and Calpionella zones, further divided into subzones. The stratigraphical ranges of 22 chitinoidellid (the genera Almajella, Borziella, Carpathella, Chitinoidella, Daciella, Dobeniella, Longicollaria, and Praetintinnopsella) and 26 calpionellid species of the genera Tintinnopsella, Crassicollaria, Calpionella, Remaniella, Borzaiella and Lorenziella have been recorded. Eight microfacies, two of which in the Gintsi Formation, and six microfacies in the Glozhene Formation have been distinguished, all being wackestones and mudstones, characteristic of open-marine pelagic deposits and differing from each other in the prevailing bioclasts. The Tithonian/Berriasian boundary was tentatively drawn at the Crassicollaria/Calpionella boundary.
{"title":"Calpionellid biostratigraphy and microfacies across the Tithonian/Berriasian boundary interval in the Western Fore-Balkan, Bulgaria","authors":"S. Petrova, P. Andreeva, I. Lakova","doi":"10.52215/rev.bgs.2023.84.3.193","DOIUrl":"https://doi.org/10.52215/rev.bgs.2023.84.3.193","url":null,"abstract":"The upper Tithonian and the lower Berriasian in the Western Fore-Balkan in Bulgaria (Gintsi and Glozhene Formations) represent a remarkable, stratigraphically expanded record of pelagic nodular and micritic limestones. More than 50 studied thin sections revealed the succession of the Chitinoidella, Praetintinnopsella, Crassicollaria, and Calpionella zones, further divided into subzones. The stratigraphical ranges of 22 chitinoidellid (the genera Almajella, Borziella, Carpathella, Chitinoidella, Daciella, Dobeniella, Longicollaria, and Praetintinnopsella) and 26 calpionellid species of the genera Tintinnopsella, Crassicollaria, Calpionella, Remaniella, Borzaiella and Lorenziella have been recorded. Eight microfacies, two of which in the Gintsi Formation, and six microfacies in the Glozhene Formation have been distinguished, all being wackestones and mudstones, characteristic of open-marine pelagic deposits and differing from each other in the prevailing bioclasts. The Tithonian/Berriasian boundary was tentatively drawn at the Crassicollaria/Calpionella boundary.","PeriodicalId":509487,"journal":{"name":"Review of the Bulgarian Geological Society","volume":"47 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139193378","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}
Pub Date : 2023-12-01DOI: 10.52215/rev.bgs.2023.84.3.283
S. Kolev, Peter Gerginov, A. Benderev, Aglaida Toteva, Simeon Valchev, Mila Trayanova-Koleva
The northern part of the Municipality of Brezovo falls within the range of a fractured massif, which predetermines the presence of springs with a limited flow rate, insufficient for water supply for the villages there, which necessitates the localization of suitable locations for boreholes drilling. After a complex assessment of the geological-hydrogeological and tectonic conditions and field surveys, favorable sections were determined with prerequisites for the presence of probable water-saturated fractured zones. As a result of geophysical surveys carried out using the SP method, in the area of the villages of Svezhen, Chehlare and Rozovets, deep water-bearing zones were delineated, which were convincingly confirmed during the subsequent exploratory drilling.
{"title":"Defining of prospective areas for the localization of groundwater in fractured massifs (on the example of the Municipality of Brezovo, Plovdiv Region)","authors":"S. Kolev, Peter Gerginov, A. Benderev, Aglaida Toteva, Simeon Valchev, Mila Trayanova-Koleva","doi":"10.52215/rev.bgs.2023.84.3.283","DOIUrl":"https://doi.org/10.52215/rev.bgs.2023.84.3.283","url":null,"abstract":"The northern part of the Municipality of Brezovo falls within the range of a fractured massif, which predetermines the presence of springs with a limited flow rate, insufficient for water supply for the villages there, which necessitates the localization of suitable locations for boreholes drilling. After a complex assessment of the geological-hydrogeological and tectonic conditions and field surveys, favorable sections were determined with prerequisites for the presence of probable water-saturated fractured zones. As a result of geophysical surveys carried out using the SP method, in the area of the villages of Svezhen, Chehlare and Rozovets, deep water-bearing zones were delineated, which were convincingly confirmed during the subsequent exploratory drilling.","PeriodicalId":509487,"journal":{"name":"Review of the Bulgarian Geological Society","volume":"61 9","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139190061","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}
Pub Date : 2023-12-01DOI: 10.52215/rev.bgs.2023.84.3.215
Stoyan Klimentov, Kalin Rouskov
In this study, several geostatistical tools have been employed for the spatial analysis and prediction of the ore body contents in the Sedefche deposit, which is located in the easternmost part of the Zvezdel-Pcheloyad ore field. To test the conditions of stationary and to define a domain reflecting this stationarity, the following approach was applied: modeling of the ore bodies (Wireframe modeling); analysis of domain boundaries, and estimation (Variogram models). The resulted three-dimensional model illustrates the spatial characteristics of Au content distribution and the morphology of the ore body within the Sedefche deposit.
{"title":"3D geological modeling of ore zones in the Sedefche deposit, Bulgaria","authors":"Stoyan Klimentov, Kalin Rouskov","doi":"10.52215/rev.bgs.2023.84.3.215","DOIUrl":"https://doi.org/10.52215/rev.bgs.2023.84.3.215","url":null,"abstract":"In this study, several geostatistical tools have been employed for the spatial analysis and prediction of the ore body contents in the Sedefche deposit, which is located in the easternmost part of the Zvezdel-Pcheloyad ore field. To test the conditions of stationary and to define a domain reflecting this stationarity, the following approach was applied: modeling of the ore bodies (Wireframe modeling); analysis of domain boundaries, and estimation (Variogram models). The resulted three-dimensional model illustrates the spatial characteristics of Au content distribution and the morphology of the ore body within the Sedefche deposit.","PeriodicalId":509487,"journal":{"name":"Review of the Bulgarian Geological Society","volume":"11 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139190622","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}
Pub Date : 2023-12-01DOI: 10.52215/rev.bgs.2023.84.3.15
B. Barbov, K. Zaharieva, Petya Karakashkova, H. Penchev
The natural zeolites were ultrasonically treated and impregnated with silver nanoparticles. The surface stabilized silver nanoparticles dispersion was obtained using an effective electrochemical reduction method. The phase and elemental composition, structure of the Ag-impregnated zeolites (clinoptilolite and mordenite) was studied by various methods such as powder X-ray diffraction, X-ray fluorescence analyses and Fourier-transform infrared spectroscopy. The Ag-impregnated clinoptilolite and mordenite natural zeolite materials with 1.20 wt %, 0.97 wt %, 0.83 wt % and 1.18 wt % silver content were established by XRF analysis. As initial materials were used three types clinoptilolite from Beli Plast, Most, Golobradovo (Kardzhali, Bulgaria) deposits and mordenite from Lyaskovets deposit in Eastern Rhodopes, Bulgaria. The catalytic ability of Ag-mordenite and Ag-clinoptilolites was investigated in the ecologically important reaction of ozone decomposition. The Ag-loaded mordenite demonstrates the higher conversion degree of ozone more than 40% in comparison with Ag-clinoptilolite materials at room temperature.
{"title":"Silver-impregnated zeolitized tuffs for environmental degradation of ozone","authors":"B. Barbov, K. Zaharieva, Petya Karakashkova, H. Penchev","doi":"10.52215/rev.bgs.2023.84.3.15","DOIUrl":"https://doi.org/10.52215/rev.bgs.2023.84.3.15","url":null,"abstract":"The natural zeolites were ultrasonically treated and impregnated with silver nanoparticles. The surface stabilized silver nanoparticles dispersion was obtained using an effective electrochemical reduction method. The phase and elemental composition, structure of the Ag-impregnated zeolites (clinoptilolite and mordenite) was studied by various methods such as powder X-ray diffraction, X-ray fluorescence analyses and Fourier-transform infrared spectroscopy. The Ag-impregnated clinoptilolite and mordenite natural zeolite materials with 1.20 wt %, 0.97 wt %, 0.83 wt % and 1.18 wt % silver content were established by XRF analysis. As initial materials were used three types clinoptilolite from Beli Plast, Most, Golobradovo (Kardzhali, Bulgaria) deposits and mordenite from Lyaskovets deposit in Eastern Rhodopes, Bulgaria. The catalytic ability of Ag-mordenite and Ag-clinoptilolites was investigated in the ecologically important reaction of ozone decomposition. The Ag-loaded mordenite demonstrates the higher conversion degree of ozone more than 40% in comparison with Ag-clinoptilolite materials at room temperature.","PeriodicalId":509487,"journal":{"name":"Review of the Bulgarian Geological Society","volume":"7 5","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139191206","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}
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