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- W2189569172 abstract "This paper presents the adsorption isotherm studies on coconut based activated carbon (AC) of different grades (650-1300 m2/g) to asses its efficiency for the removal of trinitrotoluene (TNT) from aqueous solutions. Freundlich and Langmuir adsorption isothenns are plotted and equilibrium constant and maximum adsorption capacity for each carbon is computed from the isotherm data. A linear relationship has been obtained between amount adsorbed and the surface area of carbons.The effect of varying amounts of carbon oxygen complexes on carbon surface modified by oxidation and degassing treatments, on the adsorption of TNT has also been studied. The results indicate that the increasing amount of chemisorbed oxygen on carbon has favourably influenced the adsorption behaviour of TNT. Various nitrobodies are found in the waste waters of explosive manufacturing and ammunition filling facilities.These nitro compounds are toxic in nature and must be brought down to permissible levels before their discharge into main water streams.The treatment of waste water or ground water from military ammunition plants or other such facilities contaminated with various nitro-compounds such as trinitrotoluene, dirJitrotoluene, RDX, HMX and tetryl etc. has been well studied using different types of activated carbons.I-6 78 It has been reported' that the rate and extent of adsorption of TNT depends upon the particle size and surface area of the carbon used and is independent of the pH or temperature of the aqueous solution. However, a limited literature is available on the change in adsorption behaviour of TNT on ACs under the influence of oxidation and degassing treatments. Hence, the present work was taken up with the aim to study the efficiency of five different grades of indigeneously available coconut based granular activated carbons (AC) for the removal of TNT from aqueous solutions and to study the effect of varying amounts of s~ace cm-bon oxygen complexes on the adsorption behaviour of TNT." @default.
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- W2189569172 date "1998-03-01" @default.
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- W2189569172 title "Adsorption isotherm studies of trinitrotoluene on granular activated carbon from aqueous solution" @default.
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