Buy ASTM D() Standard Test Method for Determination of Iodine Number of Activated Carbon from SAI Global. ASTM Designation: D Standard Test Method for. Determination of Iodine Number of Activated Carbon. 1. Scope. This test method covers the. Standard. Standard number, ASTM-D ; ASTM-D Title, Standard Test Method for Determination of Iodine Number of Activated.
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The carbonized samples were washed sequentially, several times with hot deionised water and finally with cold deionised water until the solutions were neutral to litmus paper. The carbon precursors are pyrolysed in presence of the chemical activating agent such as phosphoric acid H 3 PO 4zinc chloride ZnCl 2potassium hydroxide KOH etc. Phosphoric acid functions as a dehydrating agent and inhibits the formation of tar Su et al.
It is also recommended astmm the standard iodine solution should have an iodide to iodine weight ratio of 1. The straws and bagasse were air-dried for 3 months on plastic mesh, to ensure adequate drying for easy milling and avoid the loss of carbon residue due to oven-drying. Are you an Engineering professional? Ten cubic centimeter of 5 wt. We have no amendments or corrections for this standard. The test is based on a three-point adsorption isotherm. A solid exhibiting favourable adsorption isotherm as well as faster kinetics is supposed to be a good adsorbent.
D46077-94 test method for determination of iodine number of activated carbon. Adsorption of basic dye and reactive dye by waste sludge [dissertation]. The Fastest equilibrium was attained in 25 min with the optimum initial adsorbate load of 0.
Higher impregnation ratio did not substantially benefit the evolution of micropores in the carbonised samples as shown in Fig. Red Flag This Post Please let us know here why this post is inappropriate.
The amount of iodine adsorbed mg g -1 carbon at a residual iodine concentration of 0. The milled bagasse and straw samples were sieved into particle size with Endecotts laboratory test sieve on Omron No.
ASTM grants you a license as follows: Search book title Enter keywords for book title search. Other available adsorption capacity results were shown in Table 2. The performance of activated carbons from sugarcane bagasse, babassu and astj shells in removing residual chlorine.
It asstm the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. They are thus, recommended for removal of waste dye from textile effluents and trace metals from wastewater.
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The active carbons from the various cellulosic precursors had similar capacities to adsorb iodine and methylene blue. Results and V4607-94 3. Finally, in order to determinate CO 2 adsorption capacity was carried out in single column of the PSA.
The effect d4067-94 carbon dioxide CO 2 on global warming is serious problem. The amount of iodine absorbed in milligrams by 1 g of carbon using test conditions listed herein is called the iodine number. The adsorptive capacities of the granular active carbons from bagasse, sorghum and millet straws, s4607-94 large molecular weight compounds such as methylene blue, wereand mg g -1respectively.
Preparation of activated carbon from lignin by chemical activation. Historical Version s – view previous versions of standard. Click Here to join Eng-Tips and ashm with other members! Environmental Engineering Research ; 19 3: The iodine numbers which indicate the adsorptive capacities for low molecular weight substances wereand mg g -1 for bagasse, sorghum and millet straws, respectively.
The most important sources ashm CO 2 emission is the human activities. Transient response of the adsorbent bed to a step-change in the influent d46607-94 is reflective of the adsorbents performance under dynamic conditions Das et al. Standard practice for determination of adsorptive capacity of activated carbon by aqueous phase isotherm technique. It’s easy to join and it’s free. High impregnation ratio that resulted in increased amount of impregnated phosphoric acid, may have developed pores in the carbon, with wide range of sizes that may be predominantly mesoporous as indicated by the high percentage of methylene blue adsorbed Fig.
Similar effect of adsorption contact time and initial adsorbate concentration was earlier reported for indigo carmine removal by activated carbons from Terminalia catappa and Cinnarium schweinfurthi nut shell Ochonogor, Specific hazard statements are given in Section 7.
Need more than one copy? You currently cannot view this content. The porous texture of the active carbons asrm characterised by aqueous phase adsorption of iodine and methylene blue.
The adsorption isotherm for iodine on active carbons has been reported to follow Langmurian isotherm Bhatia et al. The adsorption of different concentrations of methylene blue on active carbons from bagasse, sorghum and millet straws appeared to depend heavily on the contact time and initial adsorbate concentration Fig.
Preparation and characteristics of rice-straw-based porous carbons with high adsorption capacity.
Activated Carbon Applications – Pure Carbon Blocks Thailand
It varies with changes in carbon raw material, processing conditions, and pore volume distribution see Definitions D Attainment of steady equilibrium during pyrolysis was the criteria for selecting the best temperature for the production of active carbons from the precursors. For the liquid phase, the characterization may be achieved with iodine or methylene blue adsorption Jaguaribe et al. Journal of Environmental Science and Technology, 1: A large surface area or large micro-pore volume may be achieved due to the porous structure of the solid.
Two qubic centimeter of freshly prepared starch indicator solution was added and the titration continued with sodium thiosulphate until one drop produced a colourless solution.
In porcelain crucibles, 0.