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Journal articles on the topic 'Acid-activated material'

Author: Grafiati

Published: 14 December 2024

Last updated: 31 July 2025

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1

Dai, Yi Min, Ru Bin Tan, Wen Min Shi, Zhen Fei Liang, and Long Tan. "A Study on the Reduction of HCN in Cigarette Smoke by Loading Cuprous Oxide on the Surface of Activated Carbon." Advanced Materials Research 239-242 (May 2011): 306–9. http://dx.doi.org/10.4028/www.scientific.net/amr.239-242.306.

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Taking Cu(CH3COO)2·H2O and activated carbon (AC) which was treated by acid and alkali as raw materials. The polylol reduction method was then adopted to prepare the cuprous oxide and activated carbon composite material. The structure and morphology of composite material samples were characterized by BET, SEM and XRD. The effects of cuprous oxide and activated carbon composite material on reducing the hazards of hydrocyanic acid in the cigarette were studied. Different pretreatment methods and the effect of mixture ratio to drop focal relieving harm of hydrocyanic acid in the cigarette were exa

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2

Wang, Kun, Qiao Wen Yang, Chuan Liu, Hui Zhao, Gan Chen, and Shi Wei Wang. "Study of Deashing and Activation on the Coke Fines and Semi-Cokes Based on Properties of Composite Materials." Advanced Materials Research 600 (November 2012): 178–81. http://dx.doi.org/10.4028/www.scientific.net/amr.600.178.

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Coke fines and semi-cokes have high ash content, low specific surface area and pore volume. In order to increase the properties of the sample and make the activated composite materials, it must be deashed and activated. In this research, the deashing experiment of the raw materials by different concentration of HNO3 and KOH was tested, then the material was activated in high temperature steam. From the FTIR test, we can acquire the content of the surface functional groups, such as carboxyl and hydroxyl. The specific surface area, pore size, volume of the material were determinated by using the

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3

Goodwin, Vituruch, Thanathon Sesuk, and Parinya Jitreewas. "Biobased Activated Carbon from Palm Biomass Enhancing with Acid Treatment as Supercapacitor Electrode Material." SIAM: Science and Innovation of Advanced Materials 4, no. 1 (2024): 67002. http://dx.doi.org/10.48048/siam.2024.67002.

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Current research on energy storage systems, batteries, and supercapacitor devices is aimed to enhance efficiency and improve environmental sustainability. Supercapacitors offer remarkable attributes such as high transient response and power density. Typically, supercapacitor electrode is made from highly porous carbon material, activated carbon. Commercial activated carbon could be produced from coal, peat, or coconut shell. This study focused on utilization of palm biomass, palm empty fruit bunch (EFB), as raw material to produce activated carbon electrode. The highly porous activated carbon

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4

Li, Ya Jie, Xing Yuan Ni, Jun Shen, Dong Liu, and Nian Ping Liu. "Nitric Acid Activated Carbon Aerogels for Supercapacitors." Applied Mechanics and Materials 302 (February 2013): 158–64. http://dx.doi.org/10.4028/www.scientific.net/amm.302.158.

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The electrochemical performances of resorcinol–formaldehyde-based carbon aerogels can be significantly enhanced by nitric acid activation.FT-IR spectra and SEM images reveal the constitution and morphology of samples .The electrochemical performances of materials were tested by cyclic voltammetry,galvanostatic charge/discharge test ,electrochemical impedance spectroscopy and cyclic test. The results show that activation does not influence the molecular structure of carbon aerogels,which maintains their nano-porous structure. Activation increases the specific capacitance by 50% and improves the

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5

Shrestha, Rajeshwar Man. "Characterization of Activated carbons Prepared from a Locally Available Material by Iodine Number." Journal of the Institute of Engineering 13, no. 1 (2018): 139–44. http://dx.doi.org/10.3126/jie.v13i1.20359.

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The adsorption of Iodine by the activated carbons prepared from a locally available material Lapsi Seed Stone has been studied. Various activated carbons were prepared by varying the parameters such as ratio of Lapsi Seed Stone particles to Phosphoric acid, percentage of phosphoric acid concentration, carbonization temperature and carbonization time. Determination of Iodine numbers of the activated carbons was done by the standard method. The effect of various preparation conditions on Iodine number of different activated carbons is also investigated. The optimum conditions for the preparation

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6

Kovalchuk, Oleksandr, and Victoriia Zozulynets. "STUDY OF ACID RESISTANCE OF HYBRID ALKALI ACTIVATED NORMAL HARDENING CEMENTS." Urban development and spatial planning, no. 81 (August 31, 2022): 189–98. http://dx.doi.org/10.32347/2076-815x.2022.81.189-198.

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One of the reason of loses of main production sources nowadays for chemical, food and special industries is the degradation of equipment and constructions caused by acid corrosion. Traditional materials are characterized by various disadvantages, among them: high costs of the material, low water resistance, hard technology and danger for the personal. One of the ways to obtain acid resistant material is the use of alkali activated cements, which are known are the resistant to the aggressive environments. Increasing of acid resistance is possible by reducing of system basicity level.&#x0D

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7

Ayati, Bamdad, Darryl Newport, Hong Wong, and Christopher Cheeseman. "Acid activated smectite clay as pozzolanic supplementary cementitious material." Cement and Concrete Research 162 (December 2022): 106969. http://dx.doi.org/10.1016/j.cemconres.2022.106969.

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8

Bhavna, Dhole Vaibhav Kolekar Yash Gawade Devashish Kopergaonkar &. Yogesh Patil. "STUDIES ON CASSIA TORA AS STARTING MATERIAL FOR CARBON SYNTHESIS." GLOBAL JOURNAL OF ENGINEERING SCIENCE AND RESEARCHES [NC-Rase 18] (November 23, 2018): 39–46. https://doi.org/10.5281/zenodo.1495002.

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Activated carbon has various prominent applications in day to day life including biomedical sector. <em>Cassia tora</em> is a species that spreads overwhelmingly and affects the crop yields. Acid activation of <em>Cassia tora</em> results into channel formation and impart adsorption capacity to the biomass. Acetic and phosphoric acids are used for activation of the surface of biomass. Acid activation of the biomass is expressed in terms of % removal of colorants like phenolphthalein and methyl orange

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9

Joko Murtono and Iriany. "PEMBUATAN KARBON AKTIF DARI CANGKANG BUAH KARET DENGAN AKTIVATOR H3PO¬4 DAN APLIKASINYA SEBAGAI PENJERAP Pb(II)." Jurnal Teknik Kimia USU 6, no. 1 (2017): 43–48. http://dx.doi.org/10.32734/jtk.v6i1.1564.

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 Activated carbon necessity in Indonesia was increasing along with the developments of the industriaization era. Based on natural product in Indonesia, probably activated carbon necessity could be guaranteed by domestic production. Rubber shells were solid waste which has potential for multiple uses such as raw materials for the manufacture of activated carbon. In this researched, rubber shells waste were processed into activated charcoal. The aim of this researhed was to determine the effect of the concentration of phosphoric acid activator toward the characteristics of the activated ca

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10

Park, Jung Eun, Gi Bbum Lee, Ho Kim, and Bum Ui Hong. "High Surface Area–Activated Carbon Production from Cow Manure Controlled by Heat Treatment Conditions." Processes 10, no. 7 (2022): 1282. http://dx.doi.org/10.3390/pr10071282.

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In this study, methods of adding value to cow manure were studied. Due to the properties of cow manure, activated carbon with a high surface area can only be produced by increasing the fixed carbon ratio and removing the ash content. Activated carbon was fabricated using five different treatments: (1) raw material–chemical activation, (2) raw material–hydrothermal carbonization–chemical activation, (3) raw material–hydrothermal carbonization–chemical activation–acid washing, (4) raw material–hydrothermal carbonization–heat treatment–chemical activation, and (5) raw material–hydrothermal carbon

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11

Tišler, Zdeněk, Kateřina Hrachovcová, Eliška Svobodová, Jan Šafář, and Lenka Pelíšková. "Acid and Thermal Treatment of Alkali-Activated Zeolite Foams." Minerals 9, no. 12 (2019): 719. http://dx.doi.org/10.3390/min9120719.

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The foamed alkali-activated zeolite materials have been studied primarily in terms of mechanical and structural properties as potential substitutes for concrete and other building materials. However, they also have interesting textural and acid properties that make them much more useful, especially in the chemical industry. The aim of the study is to map in detail the influence of post-synthesis modifications of alkali-activated natural zeolite foams on their chemical, mechanical, and textural properties for possible use in catalytic and adsorption applications. Alkali-activated natural zeolit

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12

Shrestha, Rajeshwar Man. "Determination of Methylene blue Number to Characterize the Lapsi Based Activated carbon Prepared by Chemical Carbonization." Journal of the Institute of Engineering 15, no. 1 (2020): 177–80. http://dx.doi.org/10.3126/jie.v15i1.27727.

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Determination of Methylene blue Number of the activated carbons prepared by Chemical Carbonization from waste material, seed stone of Lapsi has been studied. Methylene blue Number has been determined by single point method using batch adsorption method. Acids like concentrated sulphuric acid and a mixture of concentrated sulphuric acid and concentrated nitric acid have been used to prepare activated carbon. The activated carbon prepared by using a mixture of concentrated sulphuric acid and concentrated nitric acid has been found to have higher methylene blue number than the activated carbon pr

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13

Kim, Ju-Hwan, Hye-Min Lee, Sang-Chul Jung, Dong-Chul Chung, and Byung-Joo Kim. "Bamboo-Based Mesoporous Activated Carbon for High-Power-Density Electric Double-Layer Capacitors." Nanomaterials 11, no. 10 (2021): 2750. http://dx.doi.org/10.3390/nano11102750.

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Demand for hybrid energy storage systems is growing, but electric double-layer capacitors (EDLCs) have insufficient output characteristics because of the microporous structure of the activated carbon electrode material. Commercially, activated carbon is prepared from coconut shells, which yield an activated carbon material (YP-50F) rich in micropores, whereas mesopores are desired in EDLCs. In this study, we prepared mesoporous activated carbon (PB-AC) using a readily available, environmentally friendly resource: bamboo. Crucially, modification using phosphoric acid and steam activation was ca

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14

Lin, Shaomin, Yaling Yu, Yue Tan, et al. "The Mechanism of Porcelain Toughened by Activated Kaolinite in a Lower Sintering Temperature." Materials 15, no. 11 (2022): 3867. http://dx.doi.org/10.3390/ma15113867.

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A high sintering temperature is usually required to acquire excellent performance in the ceramic industry, but it results in high fuel consumption and high pollution. To reduce the sintering temperature and to toughen the porcelain, a self-produced sintering additive of citric acid activated kaolinite was added to the raw material; X-ray powder diffraction (XRD), transmission electron microscope (TEM), scanning electron microscope (SEM), and thermal gravity analysis and differential scanning calorimetry (TG-DSC) were used to characterize the samples, and the toughening mechanism was discussed.

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15

Julie, Ospino Orozco, Parra Barraza Juliana, Cervera Cahuana Sigifredo, Eugenio Coral Escobar Euler, and Vargas Ceballos Oscar. "Activated carbon from cassava peel: A promising electrode material for supercapacitors." Revista Facultad de Ingeniería, Universidad de Antioquia, no. 102 (August 10, 2020): 88–95. https://doi.org/10.17533/udea.redin.20200803.

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Supercapacitors are conventional devices in electrical circuits that produce electrical pulses at high power levels in short periods. Electrodes for supercapacitors were prepared with activated carbon. Activated carbon was obtained from cassava peels treated by chemical activation with potassium hydroxide (KOH) and phosphoric acid (H3PO4), each at two different concentrations and at one carbonization temperature. The electrochemical performance of the prepared electrodes was obtained by means of cyclic voltammetry and galvanostatic charge-discharge in a 3-electrode system with an electrolytic

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16

Santana, Gregório Mateus, Roberto Carlos Costa Lelis, Emerson Freitas Jaguaribe, Rayssa de Medeiros Morais, Juarez Benigno Paes, and Paulo Fernando Trugilho. "DEVELOPMENT OF ACTIVATED CARBON FROM BAMBOO (Bambusa vulgaris) FOR PESTICIDE REMOVAL FROM AQUEOUS SOLUTIONS." CERNE 23, no. 1 (2017): 123–32. http://dx.doi.org/10.1590/01047760201723012256.

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ABSTRACT Considering the water scarcity problems facing many countries, the need for water reuse can make activated carbon (AC) an essential product for modern society. In this context, to contribute with better activated carbons that could be used to serve in water treatment, this article discusses these materials production, using bamboo as raw material, and analyses their application effectiveness. The bamboo was collected, transformed into activated carbon, by simultaneous chemical and physical activations, and named H3PO4/H2OAC. The obtained material was characterized by its yield, appare

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17

Amadou Kiari, Mahamane Nassirou, Affoué Tindo Sylvie Konan, Ousmaila Sanda Mamane, et al. "Influence of Orthophosphoric Acid Activation on the Quality of Activated Carbons." Materials Science Forum 1122 (May 21, 2024): 91–98. http://dx.doi.org/10.4028/p-kd7gn9.

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Activated carbon (AC) is an adsorbent material used for the removal of pollutants from wastewater. Unfortunately, these materials used by the industry are very expensive. This is why research is being conducted to produce low-cost activated carbons from natural biomass. The objective of this work is to study the effect of activation by orthophosphoric acid on the quality of activated carbons. The different techniques used for the characterization are: the Iodine number and the Methylene Blue Index. For activated carbons prepared in a single activation step, iodine number of 609.12 and methylen

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18

Dr., Sunil S. V.*1 Priya K. R.2 Nethravathi A. M.3 Nayana K. N.4. "Areca Catechu Husk Is a Potent Material for Preparation of Organic Cosmetics." International Journal of Pharmaceutical Sciences 3, no. 2 (2025): 1620–27. https://doi.org/10.5281/zenodo.14892388.

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In most disciplines, adsorption is an often employed phenomenon, particularly in cleaning and purification. Using a wide variety of adsorbents include clay, silica gel, activated carbon, amongst them activated carbon is a widely used. Usage of activated carbon in cosmetics is a recently developing field that include activated carbon based shampoo, sun-tan creams, toothpaste, whitening agents. Making soap using activated carbon is one example of such an application. Hence in our studies we are intrested to make a activated carbon soap by Areca catechu in our laborotory. The soap was made using

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19

Ivanichok, N. Ya, P. I. Kolkovskyi, A. M. Soltys, et al. "The effect of orthophosphoric acid on energy-intensive parameters of porous carbon electrode materials." Physics and Chemistry of Solid State 24, no. 1 (2023): 34–45. http://dx.doi.org/10.15330/pcss.24.1.34-45.

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The effect of orthophosphoric acid concentration as an activating agent on the porous structure of carbon materials derived from apricot pits and energy-intensive parameters of electrochemical capacitors formed on their basis is studied. It is found that changing the ratio of the mass of the activating agent to the mass of the raw material in acid-activated porous carbon materials (PCMs), one can control the pore size distribution in the range of 0.5-20 nm and specific surface area in the range of 775-1830 m2/g. The use of cyclic voltammetry, impedance spectroscopy and chronopotentiometry made

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20

AMINU, IBRAHIM, AZIMAH ISMAIL, JUAHIR HAFIZAN, and AZLINA MD KASSIM. "MELALEUCA CAJUPUTI LEAVES AS A RAW MATERIAL FOR PREPARATION OF ACTIVATED CARBON." JOURNAL OF SUSTAINABILITY SCIENCE AND MANAGEMENT 19, no. 8 (2024): 149–58. http://dx.doi.org/10.46754/jssm.2024.08.011.

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In this study, activated carbon was prepared from Melaleuca cajuputi leaves. The activation included both physical and chemical processes, with phosphoric acid (H3PO4) as a dehydrating agent, followed by thermal treatment at 500°C for 45 minutes. The activated carbon obtained was characterised by surface area (BET), FESEM (images), elemental analysis (EDX), and Fourier transform infrared spectroscopy (FTIR). The sample subjected to carbonisation without chemical activation showed a low surface area of 24 m2/g at 500°C. The treatment of samples with chemicals showed improvements in surface area

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21

Sun, Rui, Qianyong Zhang, Zhirao Yin, and Cun Zhao. "Effect of Modified Carbon Felt Anodes on the Performance of Microbial Fuel Cell." Academic Journal of Science and Technology 11, no. 1 (2024): 43–47. http://dx.doi.org/10.54097/7522jp77.

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In this paper, phosphoric acid, nitric acid, zinc chloride, ammonia and melamine are used as cheaper activators to modify the carbon felt material, exploring the changes of various activation materials on the power production performance and degradation performance of the device after MFC carbon felt anode treatment, and finding that phosphoric acid-activated carbon felt has the highest output voltage and the best degradation effect on the ship's oily wastewater as a MFC anode device.

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Kandasamy, Senthil Kumar, Chandrasekaran Arumugam, A. S. Sajitha, et al. "Paradisiaca/Solanum Tuberosum Biowaste Composited with Graphene Oxide for Flexible Supercapacitor." Journal of New Materials for Electrochemical Systems 24, no. 1 (2021): 21–28. http://dx.doi.org/10.14447/jnmes.v24i1.a04.

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This work focuses on the development of a novel type of chemically activated carbon networks composited with the graphene oxide. Here, the carbon networks were derived from green biomass wastes such as orange peels, banana peels and potato starch. All the obtained carbon materials were being activated using different activating agents based on the higher specific capacitance such as phosphoric acid activated orange peel derived carbon, sulphuric acid activated banana peel derived carbon and hydrochloric acid activated potato starch. Further they were individually composited with graphene oxide

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Marjanovic, Vesna, Slavica Lazarevic, Ivona Jankovic-Castvan, et al. "Functionalization of thermo-acid activated sepiolite by amine-silane and mercapto-silane for chromium(VI) adsorption from aqueous solutions." Chemical Industry 67, no. 5 (2013): 715–28. http://dx.doi.org/10.2298/hemind121026117m.

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Chromium(VI) adsorption from aqueous solutions onto thermo-acid activated sepiolite functionalized with (3-mercaptopropyl)trimethoxy-silane and [3-(2-aminoethylamino)pro-pyl]trimethoxy-silane, was investigated. Scanning electron microscopy, X-ray diffraction, Fourier transform infrared spectroscopy, thermogravimetric and differential thermal analysis, nitrogen adsorption-desorption, and determination of the point of zero charge were used to characterize the obtained adsorbents. It has been established that the silanes were successfully grafted on the thermo-acid activated sepiolite surfaces an

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Wu, Zhifu. "Study on the Synthesis and Photocatalytic Perfomance of Tube shaped Activated Carbon -TiO2 Composite Materials." Technium: Romanian Journal of Applied Sciences and Technology 2, no. 7 (2020): 143–50. http://dx.doi.org/10.47577/technium.v2i7.1841.

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Titanium dioxide semiconductor material is one of the earliest photocatalysts with stable and reliable properties, but its quantum efficiency is relatively low. In order to improve the photocatalytic performance of titanium dioxide, the activated carbon tubular-titanium dioxide composite photocatalytic material was synthesized by sol-gel method with n-butyl titanate and activated carbon as main raw materials in the system of isopropyl alcohol and glacial acetic acid. X-ray diffraction (XRD), scanning electron microscope (SEM) and nitrogen adsorption were used to characterize the phase, particl

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AYODELE, Adekemi Loretta, Abideen Saheed Akinniyi, Adeoluwa Peter Gbolade, and Adeyemi Timilehin Adetokunbo. "Strength Properties of Alkaline Activated Phosphoric Acid Stabilized Laterite." Civil Engineering Dimension 24, no. 2 (2022): 115–24. http://dx.doi.org/10.9744/ced.24.2.115-124.

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This study investigated the effect of alkaline activation on the properties of Phosphoric Acid (PA) stabilized laterite. Maximum Dry Density (MDD), Optimum Moisture Content (OMC), California Bearing Ratio (CBR) and Unconfined Compressive Strength (UCS) of the laterite were determined to ascertain its suitability as a construction material. Laterite samples were stabilized with 1M and 2M PA at 5, 10 and 15%, respectively, by weight of dry soil. Some PA stabilized laterite were further mixed with an alkaline activator. All the stabilized laterites were moist cured for up to 14 days. The results

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Sekewael, Serly Jolanda, and Mirella Fonda Maahury. "Characteristic of Natural and Acid-activated Clay From Hatu Village, Mollucas Province: FTIR, XRD, XRF, SEM-EDX, TEM, and BET Analysis." Molekul 18, no. 3 (2023): 459. http://dx.doi.org/10.20884/1.jm.2023.18.3.8316.

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Research on the chemical and physical characteristics of natural and acid-activated clay from Hatu Village had been carried out using FTIR, XRD, XRF, SEM-EDX, TEM, and BET surface area analyzer instruments. The natural clay had activated with 0.25 M sulfuric acid for 3 hours using the reflux method, then calcined with 700 Watt microwave radiation for 10 minutes. Overall, FTIR data show tetrahedral and octahedral functional groups that create clay minerals. There is a decrease in absorption intensity due to acid's influence, which dissolves cations in the octahedral and interlayer clay. The XRD

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Shrestha, Rajeshwar Man. "Effect of Preparation Parameters on Methylene blue number of Activated Carbons Prepared from a Locally Available Material." Journal of the Institute of Engineering 12, no. 1 (2017): 169–74. http://dx.doi.org/10.3126/jie.v12i1.16900.

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The adsorption of Methylene blue by the activated carbons prepared from a locally available material Lapsi Seed Stone has been studied. Various activated carbons were prepared by varying the parameters such as ratio of Lapsi seed stone particles to Phosphoric acid, carbonization temperature and carbonization time. Determination of Methylene blue numbers of the activated carbons was done by single point method by batch mode. Methylene blue number is found to be affected by the various preparation conditions like carbonization temperature, carbonization time, ratio of activating agent and Lapsi

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Strejcová, Kateřina, Zdeněk Tišler, Nikita Sharkov, Martina Michálková, Kateřina Peroutková, and Eliška Svobodová. "Influence of the Addition of Blast Furnace Slag to Alkali-Activated Mixtures Based on Natural Zeolites." Minerals 11, no. 12 (2021): 1307. http://dx.doi.org/10.3390/min11121307.

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This study focuses on a comparison of alkali-activated materials based on natural zeolites without and with the addition of blast furnace slag and their subsequent modification by acid leaching. The addition of slag to alkali-activated mixtures is generally used to increase the strength. The subsequent modification of its chemical, textural and mechanical properties by acid leaching makes this material usable in other industries, especially in the chemical industry. This study aimed to examine the influence of the addition of blast furnace slag to alkali-activated mixtures based on natural zeo

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Ambarwati, Yuni. "Utilization of Cassava Rods Waste as Active Charcoal and The Effect of HCl Activator and Activation Time on Active Charcoal." Tekmapro : Journal of Industrial Engineering and Management 14, no. 2 (2019): 77–81. http://dx.doi.org/10.33005/tekmapro.v14i2.122.

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Some research proved that activated carbon could be made from organic materials or anorganic material with very high carbon content. The exist research of activated carbon from coconut shell, bagasse, cassava peel. In fact, there are a lot of material can be used as raw material, like cassava rods wastebecause the amount is very abundant and has not been widely used. This research aims toreceive the right conditionsin the manufacture of activated charcoal from cassava stem wastewith variations in concentration and time of activationwith chemical activation methodsusing a hydrochloric acid acti

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Hernández-Barreto, Diego Felipe, Jenny Paola Rodriguez-Estupiñán, Juan Carlos Moreno-Piraján, Rocío Sierra Ramírez, and Liliana Giraldo. "Adsorption and Photocatalytic Study of Phenol Using Composites of Activated Carbon Prepared from Onion Leaves (Allium fistulosum) and Metallic Oxides (ZnO and TiO2)." Catalysts 10, no. 5 (2020): 574. http://dx.doi.org/10.3390/catal10050574.

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The aim of this study was to evaluate and compare the adsorption and photocatalytic activity of activated carbon-based photocatalysts. Titanium dioxide (TiO2) and zinc oxide (ZnO) were chosen as semiconductors to prepare composites with activated carbon by the wet impregnation method. Activated carbon was prepared using as starting material onion leaves (Allium fistulosum) and as activating agent phosphoric acid (H3PO4). Photooxidation and batch adsorption of phenol was studied to compare the efficiency of the materials prepared. The results showed that the composite AC–TiO2 has a greater phot

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Yang, Xuan, Chenlu He, Yu Lin, et al. "Dihydroxybenzene isomers electrochemical sensor based on activated carbon sensitive material activated by mechanochemistry and low-dosage phosphoric acid." Analytical Methods 14, no. 1 (2022): 34–43. http://dx.doi.org/10.1039/d1ay01768c.

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Niinipuu, Mirva, Kenneth G. Latham, and Stina Jansson. "The influence of inorganic components and carbon-oxygen surface functionalities in activated hydrothermally carbonized waste materials for water treatment." Environmental Science and Pollution Research 27, no. 30 (2020): 38072–83. http://dx.doi.org/10.1007/s11356-020-09839-1.

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Abstract In this study, we have examined how the activation of hydrothermally carbonized sewage sludge and horse manure influences the inorganic component of these materials and surface chemistry. This was examined through statistical correlations between kinetic tests using trimethoprim, fluconazole, perfluorooctanoic acid, and copper, zinc, and arsenic and physicochemical properties. Yield and inorganic content varied considerably, with potassium hydroxide–activated materials producing lower yields with higher inorganic content. Phosphoric acid activation incorporated inorganically bound pho

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dos Santos, Jackson Wesley Silva, Vitor Augusto dos Santos Garcia, Anna Cecilia Venturini, Rosemary Aparecida de Carvalho, Classius Ferreira da Silva, and Cristiana Maria Pedroso Yoshida. "Sustainable Coating Paperboard Packaging Material Based on Chitosan, Palmitic Acid, and Activated Carbon: Water Vapor and Fat Barrier Performance." Foods 11, no. 24 (2022): 4037. http://dx.doi.org/10.3390/foods11244037.

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Synthetic polymer coatings impact the biodegradable behavior of cellulosic packaging material. The environmental consequences of food packaging disposal have increased consumer concern. The present study aimed to use natural polymer coatings incorporating palmitic acid and activated carbon applied to paperboard surfaces as a sustainable alternative to improve cellulosic packaging material’s moisture and fat barrier properties, minimizing the environmental impact. The coating formulation was defined using a Factorial Experimental Design with independent variables: chitosan, palmitic acid, activ

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Houache, O., R. Al-Maamari, B. Al-Rashidi, and B. Jibril. "Study of Date Palm Stem as Raw Material in Preparation of Activated Carbon." Journal of Engineering Research [TJER] 5, no. 1 (2008): 47. http://dx.doi.org/10.24200/tjer.vol5iss1pp47-54.

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Activated carbon adsorbent was prepared using Omani date palm tree stem as a precursor. Precursor samples were subjected to thermal treatment (at 400, 500 and 600 oC) before or after impregnation with either H3PO4 (85 wt %) or KOH (3 wt %). The activated carbon obtained was characterized by BET (surface area and porosity), Gas Pycnometry (true density) and SEM (texture). Sample subjected to carbonization, without chemical activation, exhibited low surface areas ~ 1.0 m2/g at 400 and 500 oC and 124 m2/g at 600 oC. Further treatment of such samples with either the acid or the base did not show i

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Cheah, Wee Keat, Radzali Othman, and Fei Yee Yeoh. "Organic and Inorganic Acid Activation of Activated Carbon Fiber from Palm Oil Empty Fruit Bunch." Advanced Materials Research 858 (November 2013): 122–30. http://dx.doi.org/10.4028/www.scientific.net/amr.858.122.

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Activated carbon fiber is known to posses better properties compared to granular and powdered variants, with significantly higher surface area and higher pore volume. Source of raw material and activation step are two crucial parameters for the pore development of activated carbon. Palm oil empty fruit bunch fiber contains naturally formed long open channels which offer better access of adsorbates into micropores. Chemical activation step typically involves inorganic acids such as phosphoric acid and sulfuric acid. However, such residues of inorganic acids might create unfavourable conditions

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Septiani, Septiani, Wahyu Febri Ramadhy, Angie Islammiyati, and Winda Rahmalia. "Production of Ceramic Membrane Based on Acid- and Alkali-Activated Metakaolinite as Cooling Material for Monocrystalline Silicon Solar Cell." Jurnal Kimia Valensi 5, no. 2 (2019): 159–68. http://dx.doi.org/10.15408/jkv.v5i2.8562.

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Ceramic membrane based on acid- and alkali-activated metakaolinite has been produced. It was tested as a cooling material for monocrystalline silicon solar cells. Membrane was made by several stages, such as calcination of natural kaolinite at 600 oC for 6 hours to obtain metakaolinite, activation of metakaolinite by concentrated HCl and KOH, and preparation of ceramic membrane. Kaolinite, metakaolinite, and activated metakaolinite were characterized by X-ray diffraction (XRD), X-ray fluorescence (XRF), Fourier Transform Infra-red (FTIR), and gas sorption analyzer (GSA). Diffractogram of XRD s

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Kurylenko, Viktor, and Olena Yanushevska. "ACID-BASE PROPERTIES OF NATURAL AND ACTIVATED ZEOLITES AND THEIR COMPOSITES." WATER AND WATER PURIFICATION TECHNOLOGIES. SCIENTIFIC AND TECHNICAL NEWS 39, no. 2 (2024): 10–17. https://doi.org/10.20535/2218-930022024323416.

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This study investigates the acid-base surface characteristics of natural zeolite samples from the Sokyrnytsia deposit (Ukraine). The samples include untreated natural zeolite, its acid-activated form obtained by treatment with nitric acid (HNO3, 2 M) at 40 °C under continuous stirring for 4 hours, and zeolite modified with titanium dioxide, both in its natural and acid-activated forms. The acid-base properties of all zeolite forms and composites were studied using the Hammett indicator method, which involves the selective adsorption of acid-base indicators from solutions onto the surface of so

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Iturbe-Garcia, José Luis, and Beatriz Eugenia López-Muñoz. "Ball-Milled and Acid-Treated Mineral Activated Carbon as Hydrogen Storage Material." Current Journal of Applied Science and Technology 29, no. 4 (2018): 1–13. http://dx.doi.org/10.9734/cjast/2018/44431.

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Lv, Tong, Jinrui Zhang, Rui Tao, Dongshuai Hou, Wu-Jian Long, and Biqin Dong. "Performance of acid-alkali activated dredged sludge as a supplementary cementitious material." Construction and Building Materials 458 (January 2025): 139569. https://doi.org/10.1016/j.conbuildmat.2024.139569.

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Stuetz, Dagobert. "4460708 Production of activated carbon fibers from acid contacted polybenzimidazole fibrous material." Carbon 23, no. 1 (1985): i—ii. http://dx.doi.org/10.1016/0008-6223(85)90213-1.

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Shaimardan, E., S. K. Kabdrakhmanova, M. M. Beisebekov, et al. "INFLUENCE OF LIQUID-PHASE OXIDATION OF ACTIVATED CARBON “BAU-A” GRADE WITH HYDROGENIC ACID ON ITS SURFACE STRUCTURE." NNC RK Bulletin, no. 3 (October 7, 2023): 96–102. http://dx.doi.org/10.52676/1729-7885-2023-3-96-102.

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Activated carbon is often used as a carrier, in the manufacture of catalysts and as a sorbent in medicine and pharmaceuticals, as well as in the purification of natural and waste water from various compounds and the concentration of metal ions in the metallurgical industry. A variety of applications for activated carbon causes different requirements for it. The sorption, structural and textural characteristics predetermine the main properties of activated carbon. Improvement of any characteristics of activated carbons, in order to create materials with the required performance properties, is c

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Pop, Lucian-Cristian, Mihaela Baibarac, Ion Anghel, and Lucian Baia. "Gypsum Composite Boards Incorporating Phase Change Materials: A Review." Journal of Nanoscience and Nanotechnology 21, no. 4 (2021): 2269–77. http://dx.doi.org/10.1166/jnn.2021.18957.

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The purpose of this review is to provide an overview of the available gypsum based composite including various phase change materials employed to increase the thermal energy storage capacity of building materials. A wide range of materials such as n-alkane, saturated fatty acid, fatty acid esters etc are used as phase change materials. Adding carbonaceous material (carbon nanofibers, activated nanocarbon, graphite nanosheets etc.) to augment some properties is also a common practice. In addition, there are presented the methods of obtaining the nano/macro-composites together with some thermal

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Yuan, Yang, Zhuo Chen, Hao Li Qin, and Zhao Wu Han. "The New Technology of Preparation Activated Carbon from Lignite." Applied Mechanics and Materials 483 (December 2013): 42–46. http://dx.doi.org/10.4028/www.scientific.net/amm.483.42.

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The lignite resource is rich in Xilingol League in Inner Mongolia. The two new methods were achieved to preparation activated carbon which used lignite as raw material. Firstly, the lignite was acidized by hydrochloric acid to prepare activated carbon. The catalytic materials in the ash as calcium, magnesium, iron and other elements were significantly reduced after that and the activated speed of the coal was significantly lower than the original coal, which are conducive to the development of uniform porous carbonized compound and decrease the hole broken. And a better surface area and adsorp

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Zhou, Yue, Wei Guo Pan, Rui Tang Guo, Xiao Bo Zhang, Xue Ping Wen, and Ming Fu He. "Absorption Performance of Activated Carbon with Orange Peel through Phosphoric Acid Activation Method." Advanced Materials Research 518-523 (May 2012): 2298–302. http://dx.doi.org/10.4028/www.scientific.net/amr.518-523.2298.

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In order to reduce power plant nitric oxide emission with gaining economical adsorbent, activated carbon was prepared from the raw materials of orange peel under different operating conditions in this paper. The methylene blue adsorption value of different activated carbon has also been tested, and the effects on the methylene blue adsorption performance of different dipping concentration, activation time and carbonization temperature were studied. The finding is that the dipping concentration has the most important impact on methylene blue adsorption value. The highest methylene blue adsorpti

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Jabbar, Susan F. "Preparation of activated carbon by chemical activation using Z. Spina-Christi fruits nuclei as raw material." University of Thi-Qar Journal of Science 4, no. 3 (2014): 97–100. http://dx.doi.org/10.32792/utq/utjsci/v4i3.639.

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The research work involves preparation and study of the adsorption characteristics of activated carbon to remove dyes from aqueous solutions . Z. Spina-Christi fruits nuclei were processed chemically using Phosphoric acid as chemical activator. The parameters (such as initial pH , contact time,..etc) affecting the adsorption capacity of activated carbon toward dyes removal from aqueous solutions were investigated

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Nursito, Jabal, Rini Hustiany, and Alan Dwi Wibowo. "Active Packaging System from Activated Oil Palm Shells Charcoal Shaped Sachet on Cassava Chips." Jurnal Teknologi dan Industri Pertanian Indonesia 13, no. 2 (2021): 50–57. http://dx.doi.org/10.17969/jtipi.v13i2.17631.

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Cassava chips are a type of snack that is fried and prone to rancidity if stored for a while. Cassava chips are added to the material that can adsorb gases, such as oxygen and water vapor, to reduce the occurrence of rancidity using a sachet-shaped adsorbent material. Activated charcoal is one of the gas adsorbents. Activated charcoal used is activated charcoal made from oil palm shells and activated with 20% phosphoric acid. This study aims to analyze the decrease in the quality of cassava chips with an active packaging system during storage for 30 days at 45oC. A total of 30 g cassava chips

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Jin, Jiao, Chenghui Zheng, and Huaming Yang. "Natural diatomite modified as novel hydrogen storage material." Functional Materials Letters 07, no. 03 (2014): 1450027. http://dx.doi.org/10.1142/s1793604714500271.

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Natural diatomite, subjected to different modifications, is investigated for hydrogen adsorption capacities at room temperature. An effective metal-modified strategy is developed to disperse platinum ( Pt ) and palladium ( Pd ) nanoparticles on the surface of diatomite. Hydrogen adsorption capacity of pristine diatomite (diatomite) is 0.463 wt.% at 2.63 MPa and 298 K, among the highest of the known sorbents, while that of acid-thermally activated diatomite (A-diatomite) could reach up to 0.833 wt.% due to the appropriate pore properties by activation. By incorporation with a small amount of Pt

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Jabbar, Azhaar Radhi. "Comparative study for adsorption of acidic and basic dyes on activated carbon prepared from date stone by different activation agent." Al-Qadisiyah Journal for Engineering Sciences 13, no. 1 (2020): 12–20. http://dx.doi.org/10.30772/qjes.v13i1.622.

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This research includes a lab scale work to investigate the feasibility of treating waste water which polluted with dyes exhausted from textile factory by using adsorption process. Three type of activated carbon were prepared using locally available waste material (date stone). Chemical activation method with (zinc chloride, potassium hydroxide, or phosphoric acid) was used as activators to prepared carbon. Firstly, the materials were carbonized at 275 oC for 90 min and then the carbonized materials were treated with (4 molar) solution of acid, base or salt for 24 hour. Finally, these materials

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Razgovorov, Pavel B., Roman S. Nagornov, Yuliya N. Grishina, and Anna D. Silanteva. "STUDY OF PURIFICATION PROCESS OF VEGETABLE OIL BY PINK CLAY." IZVESTIYA VYSSHIKH UCHEBNYKH ZAVEDENIY KHIMIYA KHIMICHESKAYA TEKHNOLOGIYA 59, no. 5 (2018): 59. http://dx.doi.org/10.6060/tcct.20165905.5390.

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The phase composition of natural pink clay was studied and influence of sorption properties on purification of mustard oil was investigated. The clay was activated by treatment with oxalic acid and sodium carbonate before using. The acid-base activation of natural material was shown to promote the creation of the new centers on its surface. The new materials demonstrated a positive effect on the oil purification process from fatty acids, peroxide compounds and no effect on the concentrations of carotenoids.

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Siregar, Sri Hilma, and Wirdati Irma. "SINTESIS DAN PERBANDINGAN STRUKTUR, TEKSTUR BENTONIT ALAM DAN BENTONIT TERAKTIVASI ASAM." Photon: Jurnal Sain dan Kesehatan 7, no. 01 (2016): 137–40. http://dx.doi.org/10.37859/jp.v7i01.572.

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Bentonite is a material that has several layers, which consists of one layer of octahedral and two tetrahedral layers or commonly known as the bentonite mineral that is composed of layers of 2: 1. Bentonite nature in general is less than optimal when used as an adsorbent. This can be overcome by activating the natural bentonite either chemistry or physics. In this study, natural bentonite acid activated. Bentonite activated with HF acid with a variety of 1% -5%. Acid can damage the structure of octahedral layers in the space between the layers. Effect of activation with HF acid cause ion excha

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