Measurement of Rarely Investigated Trace Elements As, P, Sr, Zr, Rb and Y in Waste Tires

Rácz, László; Solti, Szabolcs; Gresits, I.; Tölgyesi, S.; Benedek, Dóra; Valentínyi, Nóra; Mizsey, Péter

doi:10.3311/ppch.8101

Cited by 6 publications

(5 citation statements)

References 30 publications

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“…Rubber tires are designed to endure rough mechanical and weather conditions while remaining functional and undamaged among extreme settings, including the presence of microorganisms. This capacity of heavy resistance is one of the main reasons why rubber is difficult to reutilize or process [3].…”

Section: Introductionmentioning

confidence: 99%

Experimental Analysis of Temperature Influence on Waste Tire Pyrolysis

et al. 2021

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Pyrolysis is an optimal thermochemical process for obtaining valuable products (char, oil, and gas) from waste tires. The preliminary research was done on the three groups of samples acquired by cutting the same waste tire of a passenger vehicle into cylindrical granules with a base diameter of 3, 7, and 11 mm. Each batch weighed 10 g. The heating rate was 14 °C/min, and the final pyrolysis temperature was 750 °C, with 90 s residence time. After the pyrolysis product yields were determined for all of the three sample groups, further research was performed only on 3 mm granules, with the same heating rate, but with altered final pyrolytic temperatures (400, 450, 500, 550, 600, 650, 700, and 750 °C). The results of this study show that thermochemical decomposition of the waste tire sample takes place in the temperature range of 200–500 °C, with three distinct phases of degradation. The highest yield of the pyrolytic oil was achieved at a temperature of 500 °C, but further heating of volatile matters reduced the oil yield, and simultaneously increased the yield of gas, due to the existence of secondary cracking reactions. The analysis of pyrolytic oil and char showed that these products can be used as fuel.

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Section: Introductionmentioning

confidence: 99%

Experimental Analysis of Temperature Influence on Waste Tire Pyrolysis

et al. 2021

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“…The values for all investigated samples were below unity, corresponding to an annual dose range of 0.3 to 1 mSv y −1 , except those for sample D16. Table 4 shows the average concentrations of 33 elements (in wt/wt%), which were determined by using an Alharbi et al 247 EDXRF spectrometer (Yu et al, 2002;Rácz et al, 2016) to test whether elements were above toxicity reference levels (Noli and Tsamos, 2016). Silicon, Sn, In, and Fe were detected in all investigated samples, with Si being predominant and ranging from 19.50% (D18 from Indonesia) to 80.22% (D9 from Turkey).…”

Section: Activity Index I γmentioning

confidence: 99%

Natural radioactivity level of clay, ceramic, and stone cooking dishes in Saudi Arabia

Alharbi¹

2016

Int. J. Phys. Sci.

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Standards and guidelines are needed in the manufacture of household cooking dishes from clay, ceramic, and stone in Saudi Arabia. The radioactivity levels due to the presence of 40 K, 232 Th, and 226 Ra in these materials were determined using gamma spectrometry equipped with high purity germanium (HPGe) detector. The activity concentrations of 226 Ra ranged from 5.75 Bq kg −1 (Yemen stone sample) to 192.35 Bq kg −1 (China ceramic sample), those of 232 Th ranged from 6.17 Bq kg −1 (Yemen stone sample) to 192.41 Bq kg −1 (China ceramic sample), and those of 40 K ranged from 43.92 Bq kg −1 (clay sample manufactured in Bahrah, Saudi Arabia) to 656.96 Bq kg −1 (ceramic sample from Romania). Radiological indices were measured for all samples to ascertain the potential radiation health hazards. The average concentrations for 226 Ra and 232 Th and the absorbed dose rate (D R) in clay and ceramic dishes exceeded the permissible global limits, with the exception of clay samples from Makkah, Saudi Arabia. The 226 Ra and 232 Th concentrations in all cooking dishes manufactured from stone were within safety limits. However, most of the average values obtained for the activity concentration of 40 K exceeded the recommended limit. The radium equivalent (Ra eq), annual gonadal dose equivalent (AEDE), external hazard index (H ex) , and gamma activity index (I γ) were found to be below the internationally accepted safe limit, except in a ceramic sample imported from China. The sample also had an annual effective dose (AEDE) that slightly above unity. The concentrations of a total of 33 chemical elements were estimated by using an ARL QUANT'X energy-dispersive X-ray fluorescence spectrometer. In most samples, the elements' concentrations exceeded the reference level values. In conclusion, care must be taken when using cooking dishes manufactured from clay, ceramic, and stone.

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“…But there are also several limitations of a complex sample pretreatment and a longer analytical time and a close-contact inspection of the material to extract the analytical information, especially for AAS technique, it cannot perform multi-element analysis at the same time. Therefore, a new analytical technique with minimal sample pretreatment and rapid analysis is necessary to determine the concentration of the composition analysis of steel [2][3][4] . As modern metallurgical production is becoming more and more large-scale, high-speed and integrated, on-line analysis of smelting process becomes the focus of metallurgical analysis and research, and then, realizing the real-time and closed-loop control of the whole smelting process becomes the development direction of on-line analysis of metallurgy.…”

Section: Introductionmentioning

confidence: 99%

In-situ monitoring and characterization of the component analysis of steel at elevated temperature environment of a steel industry using stand-off LIBS

Peng,

Song,

Zhang

2024

Sixth Conference on Frontiers in Optical Imaging and Technology: Imaging Detection and Target Recognition

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Chemical component analysis is an indispensable part of steel analysis. At present, the remote intelligent detection of the component analysis of steel needs to be further developed. In this study, laser‐induced breakdown spectroscopy (LIBS), a sensitive optical technique that can rapidly analyze various elements, is applied to real‐time detection and steel analysis of steel at elevated temperature environment of a steel industry. Representative steel samples are selected for spectral analysis. The characteristic spectral lines of different elements observed in the spectra. By comparing the spectra of different samples, the differences among them discussed. First, principal component analysis (PCA) is used for dimensionality reduction. With the help of PCA, the data are distributed in two dimensional and three-dimensional space and different kinds of the constituent elements of steel are classified successfully. Then, combined with error back propagation training artificial neural network, the steel identification model was established, and the recognition rate can be improved. The results show that LIBS is a powerful tool for remote intelligent real-time detection and classification, and has great application prospects in the chemical component analysis of steel at elevated temperature environment in the future.

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Measurement of Rarely Investigated Trace Elements As, P, Sr, Zr, Rb and Y in Waste Tires

Abstract: Abstract

Cited by 6 publications

References 30 publications

Experimental Analysis of Temperature Influence on Waste Tire Pyrolysis

Experimental Analysis of Temperature Influence on Waste Tire Pyrolysis

Natural radioactivity level of clay, ceramic, and stone cooking dishes in Saudi Arabia

In-situ monitoring and characterization of the component analysis of steel at elevated temperature environment of a steel industry using stand-off LIBS

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