Comparison of the effects of different chemical activation methods on properties of carbonaceous adsorbents obtained from cherry stones

Removal of fluoxetine from water by adsorbent materials produced from paper mill sludge

“…According to Yu et al [39], the ash content of a conventional AC should not exceed the 10%. It is also visible a decrease in hydrogen content, related to the aromatization of the carbon structure [40]. The results of TOC analysis are consistent with the ones of proximate and ultimate analyses.…”

“…The low values of the S BET in these materials can also be due to the presence of ashes (inorganic matter) not removed by the washing step. The decrease in micropore volume of these two materials and the difference in carbon content between them can be related to the destruction of the microporous structure resulting from the extreme conditions of the activation which is done by impregnation [40] and moreover because of the presence of the ashes, that can occlude the micropores.…”

Granular Activated Carbon from Grape Seeds Hydrothermal Char

“…The first stage is represented by HTC: grape seeds were treated in liquid pressurized water at moderate temperatures in the range 180-250 • C. Through HTC, the seeds can be processed without prior drying, thus avoiding the considerable amount of energy that is required for water evaporation. This can be a crucial advantage when compared to other carbonization processes, like pyrolysis, which requires relatively dry substrates (maximum acceptable moisture content ≈30%) and a dry environment [32].…”

Thermal analysis of activated carbon obtained from residue after supercritical extraction of hops

“…Recently, much attention has been devoted to obtaining activated carbons from post-agricultural and post-industrial waste products, for example from walnut shells, fruit skins and stones, timber production waste [15][16][17][18][19], used car tyres or phenol-formaldehyde resins and waste sediments posing serious challenge to waste management [20][21][22][23]. The possibility of their use for production of carbon adsorbents can significantly contribute to resolution of the problems with utilisation of waste products.…”