2013-7-24 · l''r~paration or nitrk acid modiried granular ;u:tiYated carbon The carbon surface was modified ith nitric acid as foll ows: The RAC was treated with cone. nitric acid at a ratio or 10 g of acti vated carb::J n to 100 ml or nitric acid. in a coni cal l''lask with a t: ldSS stopper and was kept overni ght at room temperature.
Nitric acid oxidation of activated carbon fabric in combination with calcination in N2 at different temperatures was conducted to explore the influence of surface carbon-oxygen complexes on the ...
2012-7-10 · ABSTRACTThe influences of sulfur, HNO3, and thermal treatments on the properties and Hg adsorption of activated carbon (AC) derived from bituminous coals were evaluated. These ACs were impregnated with either polysulfide or elemental sulfur at 120, 200, and 600°C. Additional ACs were treated with HNO3 at 95°C to incorporate oxygen functionalities, and then subjected to temperature …
Any organic matter in the sample must first be destroyed by the addition of nitric acid (HNO3) to the sample prior to fuming with HClO4"unquote.If proper care is not taken, wet-ashing treatment ...
The present study investigated the preparation of nitric acid modified powder activated carbon (MPAC) and its adsorption of trace amounts of Ni(II) from aqueous solution. Results showed that raw powder activated carbon modified with 15% nitric acid (MPAC-15%) had the most developed pore structure an …
2020-10-13 · carbon derived from date palm leaf wastes. For this purpose, activated carbon was prepared via chemical treatment of palm leaf wastes with sulfuric acid (H 2 SO 4), phosphoric acid (H 3 PO 4), and nitric acid (HNO 3), respectively, with subsequent carbonization through thermal treatment.
The structure and surface chemical properties of activated carbon after nitric acid modification and their influences on adsorption and catalytic ozonation of acid red 3R were investigated. The results showed that both specific surface area and micropore volume of activated carbon decreased, but mesopore volume increased after nitric acid modification.
The primary object of this work is to study the effect of nitric acid on the porous and morphology structure of activated carbon. Production of activated carbon from oil palm shell was prepared with pyrolysis process at temperature 900°C and by introduction of 10 M nitric acid. Determination of surface area, pore volume and pore size distribution of activated carbon was conducted by the N
2021-5-22 · Effect of nitric acid treatment on the pitch properties and preparation of activated Carbon Letters ( IF 1.917) Pub Date : 2021-05-22, DOI: 10.1007/s42823-021-00256-z Min Il Kim, Byong Chol Bai The pore structure of pitch-based activated carbon prepared by physical activation was improved by nitric acid treatment of pitch.
1986-1-1 · NITRIC ACID TREATMENT OF ACTIVATED CARBON 245 TABLE II SURFACE AREAS AND HELIUM DENSITIES OF NUCON CHARCOAL SAMPLES* Sample wt. (g) Helium Surface density (g/cm3) area (m2/g) As received 0.0507 2.013 1020 After HN03 treatment 0.0509 2.062 970 * Carried out by J. D. Kintigh of the ORNL Metals and Ceramics Division. increase in surface area or ...
2021-5-22 · The pore structure of pitch-based activated carbon prepared by physical activation was improved by nitric acid treatment of pitch. The nitric acid treatment …
After activated carbon is oxidized and modified with nitric acid (1:1), its cation exchange capacity can amount to 1.840 mmol • g-1. The modified activated carbon is used as adsorbent for the ...
2017-6-20 · Adsorption on activated carbon and biochar of six heavy metals and 30 organic contaminants was examined both in water solution and in the presence of fulvic acid. It was found that activated carbon was a more efficient adsorbent than biochar for organic and inorganic compounds. Fulvic acid was found to decrease adsorption on both adsorbents by
The aim of this work was to investigate the capacity of nitric acid modified-H3PO4-activated carbon produced from Gmelina arborea bark in the removal of metanil yellow from aqueous solution.
The activated carbon called GAC, was divided into 2 equal parts and each part was subjected to different treatments. Modification With Nitric Acid. Activated carbon (GAC) was put into contact with 100 mL of 6M HNO 3 solution for 6 h at boiling temperature (Noh and Schwarz, 1990; Daud and Houshamnd, 2010). It was then filtered, washed with ...
2018-1-12 · EAAOP2 2009 Activated carbons treated with sulphuric acid: catalysts for catalytic wet peroxide oxidation GOMES H.T. 1,2*, MIRANDA S.M. 2, SAMPAIO M.J. 2, SILVA A.M.T. 1 AND FARIA J.L. 1 1Laboratory of Catalysis and Materials (LCM), Associate Laboratory LSRE/LCM, Department of Chemical Engineering, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias s/n, 4200 …
2019-7-1 · Results showed that raw powder activated carbon modified with 15% nitric acid (MPAC-15%) had the most developed pore structure and the highest adsorption efficiency for Ni(II) in aqueous solution. For MPAC-15%, the pore width was dominated by micropores with pore width about 1 nm and the total amount of chemical functional groups of MPAC-15% ...
2010-9-25 · The nitric acid treated activated carbon was briefly named as NAC.2.2. Resulted gas analysisDuring the wet oxidation of activated carbon by nitric acid treatment, a brick red gas was emerged from the glass-made condenser.
Nitric acid functionalization of carbon monoliths for supercapacitors: Effect on the electrochemical properties July 2016 International Journal of Hydrogen Energy 41(28):12127
Total acid sites (TAS) of the raw wood-based activated carbon increased up to 72% with the nitric acid oxidation, reflecting mainly an increase in phenolic groups. ...
2020-5-15 · Effects of Sulfur, Nitric Acid, and Thermal Treatments on the Properties and Mercury Adsorption of Activated Carbons from Bituminous Coals Hsing-Cheng Hsi1*, Mark J. Rood2, Massoud Rostam-Abadi2,3, Yu-Min Chang1 1 Institute of Environmental Engineering and Management, National Taipei University of Technology, No. 1, Sec. 3, Chung-
2016-7-27 · Special Research Report SR-28 The preparation and properties of low ash activated carbons from a Pennsylv~nia high volatile bituminous coal have been investigated. The conversion of raw coal to such carbon was carried out in three steps. These are (1) the oxidation of the raw coal to humic acids by air and nitric acid followed by separation of the mineral matter with solvent extraction of the ...
2014-9-15 · Nitric acid (HNO 3) modification of activated carbon (AC) prepared from waste tea with the assistance of microwave activation was studied.Unmodified and modified AC samples were characterised in terms of structural, morphological and chemical properties. Methylene blue () and phenol adsorption from aqueous solution were investigated to determine the effect of modification on the adsorption ...
activated carbon fabrics modified using nitric acid oxidation com-bined with thermal treatment are prepared. The chemical composi-tions of the introduced surface oxides in these porous carbons are characterized using the thermal desorption technique, and the elec-trochemical performances of the resulting capacitors are also exam-
The results showed that the N-doped biomass-activated carbon having the higher doping content was obtained by a redox method with nitric acid at 25 °C, a solid nitrogen source ratio of 1: 1 and charring at 800 °C for 2 hours. The adsorption efficiency for the divalent copper ion of the sample obtained by the redox method was 41.15% higher ...
Surface modification of activated carbons by various physicochemical methods directs an attractive approach for improvement of heavy metal uptake from aqueous solutions. Activated carbons were modified with HCl and HNO3 optionally followed by NaOH. The effects of …
2017-3-17 · The primary object of this work is to study the effect of nitric acid on the porous and morphology structure of activated carbon. Production of activated carbon from oil palm shell was prepared with pyrolysis process at temperature 900°C and by …
2019-12-3 · Nitric acid oxidation of activated carbon fabric in combination with calcination in at different temperatures was conducted to explore the influence of surface carbon-oxygen complexes on the performance of electrochemical capacitors fabricated with the carbon fabric. The performance of the capacitors was tested in 1 M within a potential range of and 0.6 V.