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Artículos de revistas sobre el tema "Contenu en carbone"

Autor: Grafiati

Publicado: 25 de mayo de 2024

Última modificación: 31 de julio de 2025

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1

Caron, Marie-Andrée, Etienne Clermont, Sophie Tessier, and Anne Fortin. "Comptabilisation des quotas carbone : une lecture conventionnaliste." Comptabilité Contrôle Audit Tome 30, no. 4 (2024): 135–91. https://doi.org/10.3917/cca.304.0135.

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Le normalisateur comptable international (l’IASB) œuvre depuis 2003 à élaborer une norme de comptabilisation des quotas d’émission carbone. Or, aucune norme n’existe à ce jour. En l’absence de norme, les émetteurs ont fait des choix qui rejoignent les deux principales bases d’évaluation comptable, c’est-à-dire le coût historique et la juste valeur. Cet article s’intéresse aux conditions sous-jacentes aux choix de base d’évaluation pour la comptabilisation des quotas carbone à la lumière de la théorie des conventions, dans une situation exceptionnelle où il y a absence de normalisation à l’égar

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2

Van Ryckeghem, S. "Caractérisation des formes physico-chimiques des deux radionucléides principaux (18F et 11C) produits par irradiation de cible et du principal radionucléide parasite (13N) rejetés par les installations françaises de fabrication de radiopharmaceutiques au moyen d’un cyclotron." Radioprotection 56, no. 2 (2021): 127–35. http://dx.doi.org/10.1051/radiopro/2021008.

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Cette étude, réalisée par l’IRSN (Institut de Radioprotection et de Sûreté Nucléaire) dans le cadre d’une demande de l’ASN (Autorité de Sûreté Nucléaire), concerne la caractérisation des formes physico-chimiques des composés radioactifs rejetés par les installations françaises de fabrication de radiopharmaceutiques au moyen d’un cyclotron. Elle vise à disposer d’une meilleure connaissance sur les effluents gazeux radioactifs rejetés par ces installations. Cette étude porte sur les deux principaux radionucléides produits par irradiation d’une cible à des fins de fabrication de radiopharmaceutiq

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3

Bertault, Jean-Guy. "La conférence de Bandung : Initiative de Bandung pour un partenariat mondial en faveur du développement durable des forêts." BOIS & FORETS DES TROPIQUES 236 (June 1, 1993): 64–68. https://doi.org/10.19182/bft1993.236.a19789.

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Le contenu de la conférenceDix discours majeurs, une présentation de posters et six sessions, ont été tenus sur les thèmes suivants :• Construction d'un partenariat pour une gestion durable.• Leçons à tirer du passé.• Gestion de la forêt pour les générations actuelles et futures.• Aspects techniques : sylviculture, biotechnologies et systèmes interactifs de gestion de l'information.• La forêt, agent de développement.• Gestion du capital génétique en foresterie.Il serait vain de vouloir résumer ici l'ensemble des contributions. Les thèmes dominants traités ont été les biotechnologies, les cycle

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4

Duru, Michel, Jean-Pierre Sarthou, and Olivier Therond. "L’agriculture régénératrice : summum de l’agroécologie ou greenwashing?" Cahiers Agricultures 31 (2022): 17. http://dx.doi.org/10.1051/cagri/2022014.

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Face aux nombreux défis sociétaux à relever (environnement, sécurité alimentaire, santé), différentes formes d’agriculture sont envisagées. Agriculture biologique, agriculture de conservation des sols et maintenant agriculture régénératrice sont trois récits fondateurs se référant à l’agroécologie. Toutefois, l’agriculture régénératrice, nouvelle arrivée en France, reste ambiguë. Nous proposons un cadre d’analyse des formes d’agriculture en termes d’impacts et de services, que nous mobilisons pour comparer l’agriculture régénératrice à celles auxquelles elle se réfère et qui sont bien document

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5

Oualit, Mehena, Amar Irekti, and Arezki Sarri. "Influence des conditions de durcissement et le taux d’alcalins sur les performances mécaniques des matériaux alcali-activés à base du laitier de haut fourneau." Matériaux & Techniques 110, no. 2 (2022): 202. http://dx.doi.org/10.1051/mattech/2022017.

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Dans un monde qui s’oriente davantage vers le développement durable, les matériaux alcali-activés (MAA) sont identifiés comme étant une alternative aux matériaux à base cimentaire, connus pour leur forte émission de CO2 lors de leur fabrication. Bien que des efforts soient fournis pour minimiser cet impact négatif sur l’environnement par l’utilisation de sous-produits industriels lors de la fabrication du ciment Portland ou par substitution partielle du ciment dans la formulation du béton, le crédit carbone reste toutefois élevé. La présente étude vise à évaluer les propriétés mécaniques d’un

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6

Oualit, Mehena, Amar Irekti, and Arezki Sarri. "Influence des conditions de durcissement et le taux d’alcalins sur les performances mécaniques des matériaux alcali-activés à base du laitier de haut fourneau." Matériaux & Techniques 110, no. 2 (2022): 202. http://dx.doi.org/10.1051/mattech/2022017.

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Dans un monde qui s’oriente davantage vers le développement durable, les matériaux alcali-activés (MAA) sont identifiés comme étant une alternative aux matériaux à base cimentaire, connus pour leur forte émission de CO2 lors de leur fabrication. Bien que des efforts soient fournis pour minimiser cet impact négatif sur l’environnement par l’utilisation de sous-produits industriels lors de la fabrication du ciment Portland ou par substitution partielle du ciment dans la formulation du béton, le crédit carbone reste toutefois élevé. La présente étude vise à évaluer les propriétés mécaniques d’un

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7

De Cara, Stéphane, and Pierre-Alain Jayet. "Évaluation et régulation de l’effet de serre d’origine agricole." Articles 75, no. 4 (2009): 597–623. http://dx.doi.org/10.7202/602304ar.

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RÉSUMÉNous examinons la contribution du secteur agricole aux émissions de gaz à effet de serre ainsi que l’impact de mesures de régulation. À partir d’un modèle économique de l’offre agricole française à fort contenu technique, nous mesurons la contribution des activités animales et végétales à l’accumulation de méthane et de protoxyde d’azote et au stockage du carbone dans le sol et la partie aérienne des plantes. Nous donnons ensuite un éclairage prospectif sur la réaction à court et moyen terme de l’offre agricole à l’application de différents schémas de taxation. Dans un premier temps, nou

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8

Tiokeng, Bertine, Sikati Armel Gabin Tuedom, Tsobou Roger, Sob Kevine Matane, and Victor François Nguetsop. "Caractéristique du peuplement ligneux et stock de carbone le long d’un gradient forêt sacrée-champs de culture dans les Hautes Terres de l’Ouest Cameroun." European Scientific Journal, ESJ 21, no. 9 (2025): 188. https://doi.org/10.19044/esj.2025.v21n9p188.

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La gestion des forêts sacrées par les populations rurales est de plus en plus fragilisée par le changement de mentalités lié à la mondialisation. Cependant, les forêts sacrées restent les seuls refuges de la végétation ancienne bien qu’elles soient de plus en plus réduites au profit des terres cultivées. L’objectif de ce travail est de contribuer à la connaissance de la flore des ligneux et des quantités de carbone stockées par ces ligneux le long d’un gradient forêt sacrée-champs de culture dans le groupement Bandjoun. Un inventaire de la végétation ligneuse a été réalisé sur 23 placettes de

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9

Lescuyer, Guillaume, and Julienne Nadège Essoungou. "Gestion forestière multi-usages en Afrique centrale : perceptions, mises en oeuvre et évolutions." BOIS & FORETS DES TROPIQUES 315, no. 315 (2013): 29. http://dx.doi.org/10.19182/bft2013.315.a20536.

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Quoique la gestion forestière multiusages (Gfmu) soit promue par les codes forestiers d'Afrique centrale, cette approche reste mal comprise et peu mise en oeuvre pour les forêts de production et les forêts communautaires. L'article présente les résultats de 62 entretiens avec des personnes impliquées dans la gestion forestière au Cameroun, au Gabon et en République démocratique du Congo, et fait ressortir trois interprétations de la Gfmu : une exploitation durable du bois intégrant secondairement les usages des autres acteurs ; une utilisation coutumière des ressources par les populations loca

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10

Saulnier-Talbot, Émilie, and Reinard Pienitz. "Isolation au postglaciaire d'un bassin côtier près de Kuujjuaraapik-Whapmagoostui, en Hudsonie (Québec) : une analyse biostratigraphique diatomifère." Géographie physique et Quaternaire 55, no. 1 (2002): 63–74. http://dx.doi.org/10.7202/005662ar.

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Résumé En vue de retracer les phases d'isolation postglaciaire d'un lac côtier situé près de Kuujjuaraapik-Whapmagoostui (baie d'Hudson), le contenu diatomifère d'une carotte de sédiments a été analysé. La séquence sédimentaire recueillie dans le lac Kachishayoot démontre trois unités de changements paléoenvironnementaux provoqués par le relèvement isostatique postglaciaire. Ces unités se distinguent entre elles par une sédimentologie et des assemblages fossiles de diatomées contrastants. Le passage de l'argile marine à la gyttja et l'évolution des assemblages diatomifères successivement domin

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11

Tallian, Kimberly B., Milap C. Nahata, and Chang-Yong Tsao. "Role of the Ketogenic Diet in Children with Intractable Seizures." Annals of Pharmacotherapy 32, no. 3 (1998): 349–61. http://dx.doi.org/10.1345/aph.16245.

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OBJECTIVE: To provide a review of the mechanism of action, clinical efficacy, adverse effects, drug interactions, and therapeutic considerations associated with the use of a ketogenic diet to manage patients with intractable seizures. DATA SOURCES: A MEDLINE search from January 1966 to the present and relevant articles from journals were reviewed. DATA SYNTHESIS: The ketogenic diet has been used as a treatment modality since the early 1920s to control intractable seizures. The exact mechanism of action is unknown. Overall, uncontrolled clinical studies have reported that approximately one-thir

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12

Cienciala, E., Z. Exnerová, J. Macků, and V. Henžlík. "Foresttopsoil organic carbon content inSouthwest Bohemiaregion." Journal of Forest Science 52, No. 9 (2012): 387–98. http://dx.doi.org/10.17221/4519-jfs.

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The aim of this study was to evaluate organic carbon content (SOC) in the surface layers of forest soils in the two Natural Forest Regions situated in Southwest Bohemia, namely Z&aacute;padočesk&aacute; pahorkatina (NFR 6) and Česk&yacute; les (NFR 11). The study is based upon on two consecutive soil sampling campaigns during autumn 2003 and 2004. While the sampling of 2003 was inadequate to estimate bulk density, the consecutive campaign used a defined sample volume to permit an estimation of bulk density and quantification of soil organic carbon (SOC) for soil organic layers and

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13

Villalgordo-Hernández, David, Aida Grau-Atienza, Antonio A. García-Marín, Enrique V. Ramos-Fernández, and Javier Narciso. "Manufacture of Carbon Materials with High Nitrogen Content." Materials 15, no. 7 (2022): 2415. http://dx.doi.org/10.3390/ma15072415.

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Nowadays one of the biggest challenges for carbon materials is their use in CO2 capture and their use as electrocatalysts in the oxygen reduction reaction (ORR). In both cases, it is necessary to dope the carbon with nitrogen species. Conventional methods to prepare nitrogen doped carbons such as melamine carbonization or NH3 treatment generate nitrogen doped carbons with insufficient nitrogen content. In the present research, a series of activated carbons derived from MOFs (ZIF-8, ZIF-67) are presented. Activated carbons have been prepared in a single step, by pyrolysis of the MOF in an inert

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14

Saha, Dipendu, Gerassimos Orkoulas, and Dean Bates. "One-Step Synthesis of Sulfur-Doped Nanoporous Carbons from Lignin with Ultra-High Surface Area, Sulfur Content and CO2 Adsorption Capacity." Materials 16, no. 1 (2023): 455. http://dx.doi.org/10.3390/ma16010455.

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Lignin is the second-most available biopolymer in nature. In this work, lignin was employed as the carbon precursor for the one-step synthesis of sulfur-doped nanoporous carbons. Sulfur-doped nanoporous carbons have several applications in scientific and technological sectors. In order to synthesize sulfur-doped nanoporous carbons from lignin, sodium thiosulfate was employed as a sulfurizing agent and potassium hydroxide as the activating agent to create porosity. The resultant carbons were characterized by pore textural properties, X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XR

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15

Nabih, Meryem Hajji, Hamza Boulika, Maryam Elhajam, Noureddine Idrissi Kandri, and Abdelaziz Zerouale. "Synthesis of an Activated Carbon Based on Cardoon Waste and its Comparison to a Commercial Carbon in Terms of Physicochemical Characterization and Organic Dye Adsorption Performance." Key Engineering Materials 954 (August 31, 2023): 41–54. http://dx.doi.org/10.4028/p-wyfpo4.

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The present study aims to evaluate the possibility of using low-cost adsorbents based on Cardoon waste for the depollution of industrial effluents. After characterization of the raw cardoon waste [1], the carbonization was carried out at 350 °C in a muffle furnace. In order to show the performance of the method used to prepare this activated carbon (PC), a comparative study with a commercial carbon (CC) is performed. The obtained activated carbon and the commercial carbon were characterized by thermogravimetric analysis, scanning electron microscopy coupled with EDX, X-ray diffraction, Fourier

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16

Diamadopoulos, E., P. Samaras, and G. P. Sakellaropoulos. "The Effect of Activated Carbon Properties on the Adsorption of Toxic Substances." Water Science and Technology 25, no. 1 (1992): 153–60. http://dx.doi.org/10.2166/wst.1992.0023.

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The objectives of this work were to relate the activated carbon properties to its adsorptive capacity. The activated carbon needed was produced in the lab from Greek lignite coal. Subsequently, adsorption studies were performed in order to evaluate the efficiency of the various activated carbons to remove toxic substances from water. Two organic substances were used. These were phenol and fulvic acid. Additionally, the adsorption of arsenic (V) was, also, investigated. It was found that the adsorptive capacity of the activated carbons depended primarily on the ash content and the compound. The

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17

Harizanova, Sonya, Ivan Uzunov, Lyubomir Aleksandrov, Maria Shipochka, Ivanka Spassova, and Mariya Kalapsazova. "The Beneficial Impact of Mineral Content in Spent-Coffee-Ground-Derived Hard Carbon on Sodium-Ion Storage." Materials 17, no. 5 (2024): 1016. http://dx.doi.org/10.3390/ma17051016.

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The key technological implementation of sodium-ion batteries is converting biomass-derived hard carbons into effective anode materials. This becomes feasible if appropriate knowledge of the relations between the structure of carbonized biomass products, the mineral ash content in them, and Na storage properties is gained. In this study, we examine the simultaneous impact of the ash phase composition and carbon structure on the Na storage properties of hard carbons derived from spent coffee grounds (SCGs). The carbon structure is modified using the pre-carbonization of SCGs at 750 °C, followed

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18

Shahrukh, Akhtar M., Zhonglie An, Masaya Toda, and Takahito Ono. "140 Mechanical properties of Carbon nanotubes-nickel composite thin films synthesized with high carbon nanotube content." Proceedings of Conference of Tohoku Branch 2016.51 (2016): 77–78. http://dx.doi.org/10.1299/jsmeth.2016.51.77.

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19

Soltani, Salman Masoudi, and Sara Kazemi Yazdi. "Effect of Washing Solution on Surface Morphology and Ash Content of Porous Carbon." Applied Mechanics and Materials 368-370 (August 2013): 726–29. http://dx.doi.org/10.4028/www.scientific.net/amm.368-370.726.

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This work highlights the effect of post-washing stage on the surface morphology and ash content of the final porous carbon. Three different acids were selected to post-wash charred carbon including nitric, sulfuric and phosphoric acids. Scanning electron microscopy (SEM) showed that the surface of the washed carbon was not much affected by acidic washing. Moreover, the amount of retained ash for the three acids (proximate analyses) showed that nitric acid-washed carbon could best remove surface ash from the charred carbon. Energy dispersive x-ray (EDX) also showed the presence of various heavy

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20

Khruengsai, Sarunpron, Patcharee Pripdeevech, Suwichien Pongnailert, et al. "Chemical characterization of activated carbon derived from Napier grass, rubber wood, bamboo, and hemp." International Journal of Renewable Energy Development 13, no. 6 (2024): 1115–24. http://dx.doi.org/10.61435/ijred.2024.60502.

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This study examines the process and analysis of activated carbons that use H2SO4, H2O2, and NaOH as activating agents. The distinct chemical methods employed by each activator impacted the ash and carbon content, surface properties, and functional groups of the activated carbons, exhibiting notable disparities. The ash level varied from 6.86% to 37.08%. H2SO4-activated carbons had the lowest ash content, suggesting better elimination of inorganic contaminants. The iodine number, which serves as a measure of adsorption capacity, was consistent among all samples, with values ranging from 800 to

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21

Růžek, L., K. Voříšek, S. Strnadová, M. Nováková, and W. Barabasz. "Microbial characteristics, carbon and nitrogen content in cambisols and luvisols." Plant, Soil and Environment 50, No. 5 (2011): 196–204. http://dx.doi.org/10.17221/4022-pse.

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Tested soils (1991&ndash;2002) were defined by chemical, textural and microbial characteristics. From the tests which describe cambisols, the following parameters have to be stressed. The higher level of C<sub>org</sub> (1.20&ndash;1.76%), which resulted in quite high microbial biomass carbon content (396&ndash;625 &micro;g/g dry soil), high control respiration (0.45&ndash;0.80 mg CO<sub>2</sub>/h/100 g dry soil) and potential nitrification with (NH<sub>4</sub>)<sub>2</sub>SO<sub>4</sub> (6.7&ndash;18.4 mg N-NO

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22

Yu, Qiyun, Jiali Bai, Jiamei Huang, et al. "One-Pot Synthesis of N-Rich Porous Carbon for Efficient CO2 Adsorption Performance." Molecules 27, no. 20 (2022): 6816. http://dx.doi.org/10.3390/molecules27206816.

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N-enriched porous carbons have played an important part in CO2 adsorption application thanks to their abundant porosity, high stability and tailorable surface properties while still suffering from a non-efficient and high-cost synthesis method. Herein, a series of N-doped porous carbons were prepared by a facile one-pot KOH activating strategy from commercial urea formaldehyde resin (UF). The textural properties and nitrogen content of the N-doped carbons were carefully controlled by the activating temperature and KOH/UF mass ratios. As-prepared N-doped carbons show 3D block-shaped morphology,

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23

Mavrov, V., I. Dobrevski, V. Peneva, S. Rashkov, and N. Stathopoulos. "Treatment of Wastewater Containing Oil." Water Science and Technology 21, no. 1 (1989): 137–39. http://dx.doi.org/10.2166/wst.1989.0016.

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The possibilities for treatment of a wastewater containing 120 - 170 mg/l of oil, with a COD of 190 - 312 mg O2/l and a pH of 7 - 7.6, were studied. A treatment process consisting of coagulation and adsorption was investigated. The effectiveness of coagulation using aluminium sulphate, ferric chloride, and aluminium chloride, was examined, and for the adsorption process, three activated carbons (A, B, and C) were considered. Carbons A and B were new types of activated carbon based on different pyrolysed brown coals, and carbon C was a commercial activated carbon. It was established that the op

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24

Piedade, Ana P., and Liliana Cangueiro. "Influence of Carbyne Content on the Mechanical Performance of Nanothick Amorphous Carbon Coatings." Nanomaterials 10, no. 4 (2020): 780. http://dx.doi.org/10.3390/nano10040780.

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This study concerns the evaluation of the coefficient of friction, at different temperatures, of amorphous carbon thin films, deposited onto nanocrystalline sputtered copper coatings by clean-technology rf magnetron sputtering. The aim is to access the capacity of carbon thin films, with different contents of sp2 and sp1 bonds, to act as a solid lubricant for copper surfaces. Raman spectroscopy revealed that all the as-deposited coatings consist of amorphous carbon with low defect content and decreasing carbyne concentration with increasing thickness. The tribological tests at 25 °C and 200 °C

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25

Saha, Dipendu, Connelly P. Richards, Robert G. Haines, Nicholas D. D’Alessandro, Madeleine J. Kienbaum, and Christian A. Griffaton. "Soft-Templating of Sulfur and Iron Dual-Doped Mesoporous Carbons: Lead Adsorption in Mixtures." Molecules 25, no. 2 (2020): 403. http://dx.doi.org/10.3390/molecules25020403.

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Lead pollution in drinking water is one of the most common problems worldwide. In this research, sulfur and iron dual-doped mesoporous carbons are synthesized by soft-templating with sulfur content 4.4–6.1 atom% and iron content 7.8–9 atom%. Sulfur functionalities of the carbons are expected to enhance the affinity of the carbon toward lead whereas iron content is expected to separate the carbon from water owing to its magnetic properties. All the carbons were characterized by pore textural properties, x-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM) and energy disper

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26

Volperts, Aleksandrs, Ance Plavniece, Kätlin Kaare, Galina Dobele, Aivars Zhurinsh, and Ivar Kruusenberg. "Influence of Chemical Activation Temperatures on Nitrogen-Doped Carbon Material Structure, Pore Size Distribution and Oxygen Reduction Reaction Activity." Catalysts 11, no. 12 (2021): 1460. http://dx.doi.org/10.3390/catal11121460.

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The goal of this research was to synthesize activated nitrogen-doped nanocarbons with high specific surface area and adjustable pore size distribution using wood charcoal as a raw material. The resulting carbon materials were tested for possible application as oxygen reduction reaction catalysts in alkaline media. Activated carbons were obtained using a thermochemical activation method with NaOH. Nitrogen was introduced into activated carbons using dicyandiamide solution. It was demonstrated that the content of introduced nitrogen depends on oxygen content in the structure of the activated car

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27

Illescas, S., J. Fernández, J. Asensio, M. Sánchez-Soto, and J. M. Guilemany. "Study of the mechanical properties of low carbon content HSLA steels." Revista de Metalurgia 45, no. 6 (2009): 424–31. http://dx.doi.org/10.3989/revmetalm.0902.

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Möhler, Ottmar, Claudia Linke, Harald Saathoff, et al. "Ice nucleation on flame soot aerosol of different organic carbon content." Meteorologische Zeitschrift 14, no. 4 (2005): 477–84. http://dx.doi.org/10.1127/0941-2948/2005/0055.

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Khasanova, G., A. Talipbek-kyzy, K. Kasymov, K. Tolokov, and M. Tagaev. "Technology for Producing Composite Nano-structured Material Based on Natural Resources of the KR." Bulletin of Science and Practice 10, no. 2 (2024): 369–78. http://dx.doi.org/10.33619/2414-2948/99/35.

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The history of development and current state of the coal sector of Kyrgyzstan is considered. The possibilities of obtaining carbon nanomaterials from carbons, such as carbon nanotubes, nanofibers, sphere particles, graphene, graphene oxide, graphene quantum dots and carbon dots, are analyzed. The optimal moisture content and density of low-dimensional carbon powder were determined. A special mold was used to produce a composite from carbon powders.

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30

Reljic, Snezana, Manuel Martinez-Escandell, and Joaquin Silvestre-Albero. "Effect of Porosity and Surface Chemistry on CO2 and CH4 Adsorption in S-Doped and S-/O-co-Doped Porous Carbons." C 8, no. 3 (2022): 41. http://dx.doi.org/10.3390/c8030041.

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The aim of this study was to determine the adsorption performance of a petroleum pitch-based activated carbon (PPAC1:3) before and after a post-treatment with H2S. In the first step, a microporous activated carbon (PPAC1:3) with a highly developed porous structure was produced through a chemical activation route with KOH. Afterward, the synthesized activated carbon was thermally treated yielding two different series of functionalized activated carbons: (i) a series of carbons were treated directly with H2S at elevated temperatures (600 °C and 800 °C), and (ii) a series of carbons were generate

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Cheng, Jun Hua, and Di Jiang Wen. "Effects of Starting Carbon Sources on the Carbothermal Synthesis of SiC Powders." Advanced Materials Research 105-106 (April 2010): 754–57. http://dx.doi.org/10.4028/www.scientific.net/amr.105-106.754.

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Silicon carbide (SiC) powders have been prepared at 1200–1500°C by carbothermal reduction of two kind precursors of carbonl/silica mixtures: coked rice husk with high-carbon content, and gasified rice husk with low-carbon content mixed with carbon powders as an external carbon sources. The differences in nature of carbon matter in the external source and coked rice husk, and their effect on SiC synthesis have been studied by TG-DSC, TEM, XRD and laser diffraction technique. Experimental results show that the difference in nature of carbon source may affect the formation of SiC powders. The cha

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Costa Ataides, Geilton, André Henrique Bueno Neves, Cássio Marques Moquedace dos Santos, et al. "VARIAÇÃO ESPACIAL DOS ATRIBUTOS FÍSICOS E ESTOQUES DE CARBONO DO SOLO EM PLANTIO DE Schizolobium amazonicum NA AMAZÔNIA." Nativa 10, no. 4 (2022): 566–76. http://dx.doi.org/10.31413/nativa.v10i4.14540.

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Plantios de árvores proporcionam aumento dos estoques de carbono do solo, mas estudos envolvendo espécies nativas da Amazônia são incipientes. Objetivou-se avaliar a variação espacial dos atributos físicos e estoque de carbono orgânico no solo em plantio de paricá. Na área de estudo, coletaram-se amostras de solo nas profundidades de 0 a 20 cm e de 20 a 40 cm e os parâmetros analisados foram: textura do solo, macroporosidade, microporosidade, densidade aparente do solo, resistência mecânica do solo à penetração, teores e os estoques de carbono orgânico do solo. Interpolou-se os dados pelo inve

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Trenggono, Mukti, Roy Andreas, Amron Amron, et al. "An Assessment of Cilacap Coast's Total Carbonate Sediment Content." Jurnal Kelautan Tropis 24, no. 1 (2020): 15–24. http://dx.doi.org/10.14710/jkt.v24i1.8849.

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Sediments are particles derived from the dismantling of rocks from the land and pieces of shell and remains of marine organisms that contain organic matter, included carbonate sediment. The total carbonate sediment content was influenced by many factors, such as sediment grain type. This study aimed to determine the carbonate content in sediments and to determine their relationship to the sediment grain characteristic on the Cilacap coast. The sediment's carbonate content used the titration method, while the sediment grain test used a dry filter. Statistical analysis was used to determine the

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34

Nereus Tugur Redationo, Bernardus Crisanto Putra Mbulu, and Febri Valen Herwinsha. "DIFFERENCES IN TEMPERATURE OF SOLAR COLLECTORS USING PAINT WITH A MIXTURE OF COCONUT SHELL CARBON AND PALM SHELL." Mechanical, Energy and Material (METAL) 1, no. 1 (2023): 16–24. https://doi.org/10.59581/metal.v1i1.40.

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Coconut shell carbon and palm shell carbon which undergo a pyrolysis process at 1000oC were used as coatings for solar collectors. The two carbons were tested by SEM to determine their composition. Coconut shell carbon and palm shell carbon were mixed with paint as a coating on the aluminum surface of the solar collector. Aluminum alloy carbon paint was tested for temperature on the surface and bottom. The results of the SEM test, solar collector temperature test and discussion were the basis for knowing the carbon layer content of palm shells, coconut shells and without carbon layers. The res

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Tawatbundit, Kanyanat, and Sumrit Mopoung. "Activated Carbon Preparation from Sugarcane Leaf via a Low Temperature Hydrothermal Process for Aquaponic Treatment." Materials 15, no. 6 (2022): 2133. http://dx.doi.org/10.3390/ma15062133.

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The effects of hydrothermal treatment, 0–5% KMnO4 content, and 300–400 °C pyrolysis temperature, were studied for activated carbon preparation from sugar cane leaves in comparison with non-hydrothermal treatment. The percent yield of activated carbon prepared by the hydrothermal method (20.33–36.23%) was higher than that prepared by the non-hydrothermal method (16.40–36.50%) and was higher with conditions employing the same content of KMnO4 (22.08–42.14%). The hydrothermal and pyrolysis temperatures have the effect of increasing the carbon content and aromatic nature of the synthesized activat

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Kristianingrum, Susila, S. Sulistyani, and Annida Rifka Larastuti. "The Effectiveness of Active Carbon Adsorbent of Cassava Peel (Manihot Esculenta Cranzts) in Reduce Level of Chromium Metal in Tannery Liquid Waste." Indonesian Journal of Chemistry and Environment 5, no. 2 (2022): 58–67. http://dx.doi.org/10.21831/ijoce.v5i2.18813.

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This study aims to determine the characteristics, the effect of mass variation, the percentage of adsorption effectiveness of cassava peel activated carbon activated with 0.5 M HCl and activated with 0.5 M H2SO4 on the adsorption of Cr metal in leather tanning wastewater and its morphology. The subject of this research is the adsorbent of cassava peel before it is asctivated, activated by chloric acid 0,5 M, and activated by sulfuric acid 0,5 M. meanwhile the object of this research is the effectiviness of cassava peel adsorbeny in reduscing chromium metal content in tannery liquid waste. Cass

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Abbas, Ammar Salih, and Teeba Mohammed Darweesh. "Preparation and Characterization of Activated Carbon for Adsorption of Fluoroquinolones Antibiotics." Journal of Engineering 22, no. 8 (2016): 140–57. http://dx.doi.org/10.31026/j.eng.2016.08.09.

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In this research, the preparation of a chemically activated carbon from date stones by using electric and microwave assisted K2CO3 activation was studied. The effect of radiation power, radiation time, and impregnation ratio on the yield and Iodine number on the activated carbons was investigated. The activated carbon characterizations were examined by its surface area, pore structure analysis, bulk density, moisture content, ash content, iodine number, FTIR, and scanning electron microscopy (SEM). The adsorption capacity was also studied by adsorption of fluoroquinolones antibiotics, CIP, NOR

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Hidayat, Sahrul, Sarifah Mudaim, Ali Zulfikar, Nowo Riveli, and Iman Rahayu. "Synthesis of Porous Carbons from Candlenut Shells Using Various Types of Activators for Environmentally Friendly Supercapacitors." Key Engineering Materials 989 (October 28, 2024): 11–21. http://dx.doi.org/10.4028/p-pa5uem.

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Porous carbon is one of the promising electrode materials for supercapacitors due to its unique and engineerable microstructural properties. The study of the synthesis of porous carbon from waste biomass is very important due to the abundance of natural resources, low cost production and contribute to solving environmental problems. In this study, porous carbons derived from candlnut shell with various type of activator was studied the chemical structural, morphological and electrochemical properties then evaluated as electrodes for supercapacitor. We have been successfully synthesized of poro

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Karthikeyan, S., P. Sivakumar, and P. N. Palanisamy. "Novel Activated Carbons from Agricultural Wastes and their Characterization." E-Journal of Chemistry 5, no. 2 (2008): 409–26. http://dx.doi.org/10.1155/2008/902073.

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Solid waste disposal has become a major problem in India, Either it has to be disposed safely or used for the recovery of valuable materials as agricultural wastes like turmeric waste,ferroniashell waste,jatropha curcusseed shell waste,delonixshell waste andipomea carniastem. Therefore these wastes have been explored for the preparation of activated carbon employing various techniques. Activated carbons prepared from agricultural solid wastes by chemical activation processes shows excellent improvement in the surface characteristics. Their characterization studies such as bulk density, moistur

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Nyan, Tun, Moe Yee Moe, Thu Zar Swe Myat, and Thwe Aye Thwe. "Heat Contents of Carbon Fuel Prepared from Rice Husk of Bago Region." Bago University Research Journal Vol.10, No.1, no. 2020 (2020): 157–61. https://doi.org/10.5281/zenodo.3923243.

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The present research deals with the investigation of heat contents in carbon fuel from rice husk, the agricultural by-product from Kawa, Bago, Daik U and Painza Loke in Bago Region. Carbon fuel is daily used in energy fuel needs. Elemental contents in these samples were determined by using the EDXRF spectrometer. Differential thermal analysis was also performed by using DTG-60H in the different locations of Bago area in Myanmar. Heat contents of carbon fuel from Kawa, Bago, Daik U and Painza Loke were found to be 89.53, 115.67, 125.07 and 93.23 V. It was observed that the heat contents in car

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Zhao, Chun Xia, Yun Xia Yang, Wen Chen, et al. "Characterization and Electrochemical Properties of Nitrogen-Doped Ordered Microporous Carbons Containing Well-Dispersed Platinum Nanoparticles." Advanced Materials Research 284-286 (July 2011): 875–79. http://dx.doi.org/10.4028/www.scientific.net/amr.284-286.875.

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Ordered high surface area microporous carbon molecular sieves containing well-dispersed platinum nanoparticles have been prepared by chemical vapor deposition method. Acetonitrile was employed as carbon and nitrogen precursors to yield N-doped carbon molecular sieves. N-doped carbons have an average nitrogen content of ~ 4.1 wt%. Electrochemical tests showed that the rectangular-shaped CVs of N-doped carbons could be well retained over a wide range of scan rates (5~100 mV/s), and the CV curves presented a steep current change at the switching potentials. N-doped carbons exhibited excellent per

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Llamas-Unzueta, Raúl, Luis A. Ramírez-Montoya, J. Angel Menéndez, and Miguel A. Montes-Morán. "Customised Microporous Carbon 3D Structures with Good Mechanical Properties and High Nitrogen Content Obtained from Whey Powders." C 9, no. 4 (2023): 100. http://dx.doi.org/10.3390/c9040100.

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Novel customised carbon monoliths with a high specific surface area were synthesised by carbonisation plus activation of dehydrated whey powders, a biomass byproduct of the dairy industry. The whey powders were casted directly by pouring them into a desired mould. After a pseudo-sintering process promoted by the self-reaction of the whey components (mostly lactose and whey proteins) at moderate temperatures (ca. 250 °C), 3D porous carbons were obtained. The process did not require any binder or external overpressure to prepare the 3D porous carbons. Upon thermal activation with CO2 or chemical

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DENG Min, 邓敏, 叶满萍 YE Manping та 姜欣 JIANG Xin. "绿色荧光碳点检测有机溶剂中的水含量". ACTA PHOTONICA SINICA 52, № 12 (2023): 1216001. http://dx.doi.org/10.3788/gzxb20235212.1216001.

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Uchechi, Akomah,, Nwaogazie, Ify L., and Akaranta, Onyewuchi. "Characterization and Optimization of Crustacean Shell-derived Activated Carbon for Wastewater Treatment Applications." International Journal of Environment and Climate Change 14, no. 10 (2024): 270–84. http://dx.doi.org/10.9734/ijecc/2024/v14i104486.

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Comparative studies of the Surface Chemistry, morphology, and physicochemical properties of crustacean shells activated chemically using acid (H2SO4) and base (KOH) were investigated. Following the activation, samples of acid and base activated Periwinkle shells (PSAAC and PSBAC), Clam shells (CSAAC and CSBAC), whelk shells (WSAAC and WSBAC), and a 1:1 Clam/Whelk composite Shells (CWSAAC and CWSBAC) were obtained. The properties investigated were moisture content, specific gravity, surface area, porosity, ash content, carbon yield, fixed carbon, FTIR, and SEM-EDX. The findings demonstrate the

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Martin, Lukito, and Rohmatiah Ahadiati. "Stored Carbon FMU Lawu Manunggal Using a Biomass Approach in the Community Forest in Sidomulyo Village, Magetan Regency, Indonesia." Engineering and Technology Journal 07, no. 10 (2022): 1584–96. https://doi.org/10.5281/zenodo.7220568.

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Community forests provide real benefits, especially the economic value of communities around the forest, and a real contribution to environmental services. One of the benefits of forests is vital for the survival of living things because it has a role in regulating the micro and macro climate. On the other hand, forest destruction can cause climate instability. Sustainable management of community forests has become a necessity due to global economic and political changes. Sustainable Forest Management is a manifestation of the concept of sustainable forestry development. The research aims to c

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Kamedulski, Piotr, Malgorzata Skorupska, Izabela Koter, Maciej Lewandowski, Víctor Karim Abdelkader-Fernández, and Jerzy P. Lukaszewicz. "Obtaining N-Enriched Mesoporous Carbon-Based by Means of Gamma Radiation." Nanomaterials 12, no. 18 (2022): 3156. http://dx.doi.org/10.3390/nano12183156.

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In this paper, we present the results of the gamma irradiation method to obtain N-doped mesoporous activated carbons. Nitrogen-enriched mesoporous carbons were prepared from three chosen commercial activated carbons such as Carbon Black OMCARB C-140, KETJENBLACK EC-600JD and PK 1-3 Norit. HRTEM, SEM, Raman spectra, elemental analysis, XPS studies and widely approved N2 adsorption–desorption measurements allowed us to evaluate the effectiveness of N atom insertion and its influence on the BET surface area and the pore structure of modified carbons. The obtained materials have an exceptionally h

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Sebayang, Melya Dyanasari. "Battery on Carburization ST 37 Steel." Journal of Technomaterial Physics 3, no. 2 (2021): 109–14. http://dx.doi.org/10.32734/jotp.v3i2.5810.

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A surface hardening process by adding carbon to its surface without changing the core properties of the material is called the carburization process. This process is carried out at the austenite temperature so that the carbon can diffuse into the phase. This process can only be done on low carbon steels with a content of below 0.25%. This research uses ST 37 steel which is a low content steel with a carbon content of 0.18%. This type of steel is surface hardened with a carburizing temperature of 850°C for a long lasting time of 1 hour, then it is carried out under moderate cooling with outside

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Frilund, Christian, Ilkka Hiltunen, and Pekka Simell. "Activated Carbons for Syngas Desulfurization: Evaluating Approaches for Enhancing Low-Temperature H2S Oxidation Rate." ChemEngineering 5, no. 2 (2021): 23. http://dx.doi.org/10.3390/chemengineering5020023.

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Its relatively low cost and high surface area makes activated carbon an ideal adsorbent candidate for H2S removal. However, physical adsorption of H2S is not very effective; therefore, methods to facilitate reactive H2S oxidation on carbons are of interest. The performance of H2S removal of non-impregnated, impregnated, and doped activated carbon in low-temperature syngas was evaluated in fixed-bed breakthrough tests. The importance of oxygen content and relative humidity was established for reactive H2S removal. Impregnates especially improved the adsorption rate compared to non-impregnated c

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Andreas, Roy, Uyi Sulaeman, and Tien Setyaningtyas. "PEMANFAATAN KARBON SABUT KELAPA TERIMPREGNASI UNTUK MENGURANGI TEMBAGA(II) DALAM MEDIUM AIR." Molekul 3, no. 2 (2008): 91. http://dx.doi.org/10.20884/1.jm.2008.3.2.53.

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This research is conducted to produce carbons from coconut fibre which approach to activated carbon clause continue with carbon surface modification and the adsorption examination to Cu(II) ions. The research consist of several phase. Carbon making of coconut fibre conducted by carbonization processes at 320-400oC with temperature interval 20oC. Carbon yielded in characterized moisture content, ash content and its adsoprtion to iodium. The carbon surface modification conducted by loaded 2-mercaptobenzotiazol (MBT) on carbon. The adsorpsibility of carbon-MBT tested by influence of contact time,

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Wang, Zi Qiang, Li Xian Sun, Fen Xu, and Xiao Jun Peng. "The Synthesis of Nitrogen-Doped Mesoporous Carbon Spheres for Hydrogen Storage." Materials Science Forum 852 (April 2016): 864–69. http://dx.doi.org/10.4028/www.scientific.net/msf.852.864.

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The nitrogen-doped mesoporous carbon spheres have been synthesized via soft-template and hydrothermal synthetic strategies using phenol/formaldehyde resins as carbon sources and melamine as a nitrogen source. The obtained carbon spheres exhibit a spherical morphology with a size range of 3-5 μm, which possess the narrow microporosity (ca. 1.2 nm) and mesoporosity (ca. 4 nm), large surface area (560-1200 m2 g-1) and high nitrogen contents (up to 15.7 wt%). Due to the well-developed porous structure and high nitrogen content, the carbon spheres show high performance for hydrogen storage, and the

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