scholarly journals Radiometric properties of sepiolite minerals from quarries in central Anatolia of Turkey

2019 ◽  
Vol 34 (2) ◽  
pp. 149-156 ◽  
Author(s):  
Aybaba Hancerliogullari ◽  
Madee Ali ◽  
Ash Kurnaz ◽  
Seref Turhan
Keyword(s):  
Dose Rate ◽  
Gamma Ray ◽  
Raw Materials ◽  
Gamma Dose ◽  
Cement Industry ◽  
Raw Material ◽  
Central Anatolia ◽  
Gamma Ray Spectrometry ◽  
Radon Emanation ◽  
Agriculture Fertilizer

Sepiolite is a naturally occurring clay mineral of sedimentary origin and is a magnesium hydrosilicate. Sepiolite has been widely used as an additive raw material in ceramics and cement industry, pharmaceutical, cleaning-detergent, paper, paint, cosmetic agriculture, fertilizer, etc. In this study, the natural radioactivity levels, radon emanation coefficients and radon exhalation rates of 30 sepiolite samples collected from open three sepiolite quarries (Beylikova, Polath and Sivrihisar) in Central Anatolia region of Turkey were determined by using a gamma-ray spectrometry with an HPGe detector. The average absorbed gamma dose rates directly measured in Beylikova, Polath and Sivrihisar open three sepiolite quarries located in Central Anatolia region of Turkey were found as 59, 65, and 64 nGyh?1, respectively. The average activity concentrations of 226Ra, 232Th, and 40K in 30 sepiolite samples collected from those quarries were found as 38.6, 12.4, and 67.4 Bqkg?1, respectively. The average emanation coefficient and exhalation rate of radon of sepiolite samples were determined as 22 % and 0.065 Bqkg?1h?1, respectively. Also, radiological parameters (outdoor absorbed gamma dose rate, annual effective dose rate, external and internal index) were estimated to evaluate the use of sepiolite samples as additive raw materials in the building sector.

Mapping the terrestrial air-absorbed gamma dose rate based on the data of airborne gamma-ray spectrometry in southern cities of China

2012 ◽  
Vol 49 (1) ◽  
pp. 61-70 ◽  
Author(s):  
Shengqing Xiong ◽  
Nanping Wang ◽  
Zhengguo Fan ◽  
Xingming Chu ◽  
Qifan Wu ◽  
...  
Keyword(s):  
Dose Rate ◽  
Gamma Ray ◽  
Gamma Dose ◽  
Gamma Dose Rate ◽  
Gamma Ray Spectrometry

A true gift of mother earth: the use and significance of obsidian at Çatalhöyük

2011 ◽  
Vol 61 ◽  
pp. 1-19 ◽  
Author(s):  
Tristan Carter
Keyword(s):  
Raw Materials ◽  
Daily Practice ◽  
Social Identities ◽  
Raw Material ◽  
Central Anatolia ◽  
Social Significance ◽  
Key Issues ◽  
Raw Material Variability ◽  
Mother Earth

AbstractThis paper reviews 50 years of obsidian studies at Neolithic Çatalhöyük in the Konya plain, central Anatolia. A number of key issues are addressed: (1) the source of the site's raw materials, the means and forms by which the obsidian was introduced to the site and the role of Çatalhöyük in the supra-regional dissemination of these raw materials; (2) the alleged gender associations of certain obsidian goods in the burial record and beyond; (3) a more general consideration of the social significance of the circulation and consumption of obsidian at the site, including the phenomena of hoarding and gifting, plus the important role of projectiles in the creation of social identities and various forms of ritual behaviour, not least the termination of the life of a building/individual; (4) the technotypological and raw material variability through time; (5) the use of obsidian in daily practice and craft-working.

scholarly journals Geochemical And Mineralogical Assessment Of Secondary Gypsum In Al-Najaf, Iraq And Employment As Raw Material For Cement Industry

2021 ◽  
Vol 72 ◽  
pp. 215-222
Author(s):  
Mohanad R.A. Al-Owaidi ◽  
◽  
Mohammed L. Hussein ◽  
Ruaa Issa Muslim ◽  
◽  
...  
Keyword(s):  
Portland Cement ◽  
Raw Materials ◽  
Chemical Properties ◽  
Quality Standard ◽  
Cement Industry ◽  
Raw Material ◽  
Insoluble Residue ◽  
Mineralogical Study ◽  
The Mean ◽  
Industry Success

The Portland cement industry is one of the strategic industries in any country. The basis of an industry success is the availability of raw materials and, the low extraction in addition to transportation costs. The Bahr Al-Najaf region is abundant with limestone rocks but lacks primary gypsum. An investigation had been carried out to identify the source of secondary gypsum as an alternative to primary gypsum. Twelve boreholes were drilled for a depth of 2 m, as the thickness of suitable secondary gypsum layer ranges from 1 to 1.5 m. The mineralogical study revealed the predominance of gypsum followed by quartz and calcite, with an average of 62.9%, 19.6% and 14.35%, respectively. The geochemical analysis revealed that the content of SO3 is appropriate and ranging from 41.92% to 32.89% with an average of 37.73%. The SO3 content is within an acceptable range. The mean abundance of the major oxides of the study area may be arranged as SO3 > CaO> SiO2> MgO> Al2O> Fe2O3. The insoluble residue was at an acceptable rate. The laboratory experiments for milling secondary gypsum with clinker has successfully proven the production of Portland cement that matches the limits of the Iraqi Quality Standard (IQS) No. 5 of 1984. Great care must be taken when using secondary gypsum; secondary gypsum must be mixed well to maintain the chemical properties before blending with clinker and utilizing in the cement mill in the cement plant.

Determination of the radon emanation fraction from rocks by simple gamma-ray spectrometry

2018 ◽  
Vol 316 (3) ◽  
pp. 1307-1312 ◽  
Author(s):  
Kil Yong Lee ◽  
Sang Ho Moon ◽  
Yong Hwa Oh ◽  
Kyucheol Ha ◽  
Kyung Seok Ko
Keyword(s):  
Gamma Ray ◽  
Gamma Ray Spectrometry ◽  
Radon Emanation ◽  
Emanation Fraction

scholarly journals Determination the Index of Radioactive Risk In The Batang Kuantan River

2018 ◽  
Vol 7 (2.13) ◽  
pp. 429
Author(s):  
Rindi Genesa Hatika ◽  
Indang Dewata ◽  
Alizar . ◽  
Purwo Subekti ◽  
Saiful Anwar
Keyword(s):  
Gold Mining ◽  
Gamma Ray ◽  
Background Radiation ◽  
Raw Materials ◽  
Environmental Damage ◽  
Gamma Ray Spectrometry ◽  
Mining Activities ◽  
Radioactive Elements ◽  
Limit Value ◽  
Decay Series

NORM is a material containing radioactive elements that exist naturally. All minerals and raw materials contain radionuclides from nature, most important for radiation protection purposes are the U-238, Th-232 and K-40 decay series. This element naturally grows and is considered a major contributor to the annual individual background radiation dose. Therefore, each individual can be exposed to NORM through various activities they do, one of which is gold mining activities. Gold mining in addition to causing exposure to NORM, is believed also can cause significant environmental damage. This study aims to determine the index of radioactive risks that resulted from gold mining activities in the batang kuantan river. The sample used for this research is soil from batang kuantan river which then analyzed using gamma ray spectrometry. The results show that the index of radioactive risk value indicated by all soil samples in the batang kuantan river is still below the predetermined maximum limit value.  

scholarly journals The Potential of Photon Activation and Neutron Activation Techniques for Fast Soil Characterization

2020 ◽  
Vol 225 ◽  
pp. 09001
Author(s):  
Adrien Sari ◽  
Sara Garti ◽  
Frédéric Lainé ◽  
Frédérick Carrel ◽  
Jonathan Dumazert ◽  
...  
Keyword(s):  
Neutron Activation ◽  
Feasibility Study ◽  
Gamma Ray ◽  
Soil Analysis ◽  
Measurement Techniques ◽  
High Energy ◽  
Raw Material ◽  
Gamma Ray Spectrometry ◽  
Photon Activation ◽  
Secondary Target

In the frame of a partnership between CEA and VINCI, various measurement techniques are applied to soil analysis and tested in different laboratories located at CEA Saclay (France). This paper deals with two nuclear measurement techniques assessed in this project. More specifically, this paper presents the feasibility study carried out for two non-destructive active methods: photon activation and neutron activation. First, some atomic nuclides are activated either by photons or neutrons. Secondly, gamma-rays of specific energies are emitted by activated nuclides and gamma-ray spectrometry enables to identify these activated nuclides. Calibration of the full measurement system with reference samples would enable to quantify the mass of activated nuclides. Irradiations performed for photon activation measurements were conducted using a linear electron accelerator (linac) as the latter enables to generate high-energy photons by Bremsstrahlung thanks to its conversion target. Furthermore, irradiations performed for neutron activation measurements were also conducted with a linac. Indeed, photons may be converted to neutrons by photonuclear reactions using a secondary target. In the frame of this project, experiments were carried out at the SAPHIR platform (CEA Saclay) with a Linatron-M9 VARIAN linac. The electron energy was either 6 or 9 MeV. For neutron activation measurements, a secondary target made of heavy water has been used as neutron source and a polyethylene cell enabled to thermalize neutrons and increase the number of reactions of interest. In this paper, we present the different experimental setups and the measurement protocols established for this feasibility study. We show experimental results obtained with raw material samples coming from three construction sites.

scholarly journals Metode Menentukan Klor dalam Sludge Oil: Perbandingan Metode Wet dan Metode Jena

2021 ◽  
Vol 10 (1) ◽  
pp. 1-7
Author(s):  
Herliati Rahman ◽  
Akhirudin Salasa
Keyword(s):  
Environmental Sustainability ◽  
Alternative Fuels ◽  
Negative Impact ◽  
Raw Materials ◽  
Cement Industry ◽  
Raw Material ◽  
Chlorine Content ◽  
Cement Production ◽  
Average Accuracy ◽  
The Difference

Currently, the use of alternative fuels and raw materials (AFR) in the cement industry is very attractive. This is driven by demands for environmental sustainability and the efficiency of fuel and raw material costs. One of the materials that can be used as AFR is sludge oil. However, it needs to be ensured that the chlorine content in the sludge oil does not exceed the threshold so that it does not have a negative impact during the cement production process. It is known that if the chlorine content is more than the threshold, it can cause blocking or clogging of the separator and the kiln. This study aims to determine the performance of the Jena Multi EA 4000 instrument in determining the chlorine content in sludge oil quickly and accurately. Analytic Jena Multi EA 4000 is an Atomic Absorption Spectrometers (AAS) instrument that can be used for analysis of samples in the form of solids or slurries containing chlorine. As validation of the resulting analysis, the wet method is used, which as usual, to determine chlorine levels. From the statistic analysis, namely the F-test and T-test, We found that F-count equal to 0.0080 and F-table equal to 4.2839. it shows that F-count < F-table, indicating the difference in the variance of the two methods H0: s12 = s22 is accepted because there is no difference to the variability of these two tests and the value of T-count = -3.9717 and T-table = 2.1788 so that T-count <T-table is accepted because there is no difference in the average accuracy of the two methods H0: M1 = M2.  

scholarly journals Analisis Sistem Rantai Pasok Pt. Semen Gresik (Persero) Tbk

2011 ◽  
Vol 10 (1) ◽  
pp. 105 ◽  
Author(s):  
Bahrain Boru Sinaga
Keyword(s):  
Supply Chain ◽  
Production Scheduling ◽  
Planning Process ◽  
Raw Materials ◽  
Cement Industry ◽  
Raw Material ◽  
Fast Time ◽  
Supply Chain System ◽  
Purchase Order ◽  
Chain System

The cement industry is an industry that requires a supply chain system is structured and well organized, it is influenced by several things, namely the level of demand for raw materials (raw material), resources, production processes, scheduling, transportation, supplier, allocation, distributors, retailers, product until they reach the consumer. This paper discusses the supply chain system on PT. Semen Gresik ranging from an overview of the company, Aggregate planning, process and production scheduling and logistics of PT Semen Gresik and supply chain management to pursue the relationship and coordination between the processes of other firms in the business pipelines, ranging from suppliers to give priority to current customers as well goods between the company, since most upstream to most downstream. The  decision  to  determine  the  transportation  used  to  distribute  the  products  is  very important. Selection of transport strategy used to obtain the type of transport that provides a fast time in the distribution is done by comparing the transport strategy transport using trucks and trains. Stages of the bidding process conducted by the company Semen Gresik to the winning vendor specified delivery of bidder list, create request for quotation, quotation maintain vendor, price comparison, process purchase order, payments, and evaluation. Keywords : Supply chain, logistics, strategy, supplier

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