Adsorption studies of recalcitrant compounds of molasses spentwash on activated carbons

Preparation and evaluation of activated carbons from lotus stalk with trimethyl phosphate and tributyl phosphate activation for lead removal

“…4c and d. It revealed that the major C 1s spectra consisted of four groups: (peak I) graphitic carbon at 284.6 eV; (peak II) hydroxyl or ether groups at 286.1 eV; (peak III) C@O groups at 287.7 eV; and (peak IV) carboxyl groups at 289.3 eV [36][37][38]. The O1 s spectra of the carbons were resolved into three individual component peaks: (peak 1) C@O groups (531.2 eV), (peak 2) CAO or CAOAC groups at 533.2 eV and (peak 3) carboxyl groups at 536.6 eV [39][40][41][42]. Thus, the previous assignments of functional groups determined by FTIR were fully confirmed by XPS analysis.…”

Adsorption studies of methylene blue and phenol onto vetiver roots activated carbon prepared by chemical activation

“…In order to situate our vetiver roots activated carbons among those prepared from other precursors and commercial ones used to remove phenol and dyes from aqueous solutions [32,[43][44][45][46][47][48][49][50], a comparison based on the Langmuir saturation capacity, Q 0 , was carried out. The results, illustrated in Table 6, had shown that the vetiver roots fibres could be considered as a promising AC precursor.…”

Preparation and characterisation of raw chars and physically activated carbons derived from marine Posidonia oceanica (L.) fibres

“…Thus, it was shown that the C1s spectrum has been deconvoluted into five components with chemical shifts corresponding to: (I) graphite type (284.1-284.4 eV); (II) amorphous carbon, hydroxyl groups, phenolic, alcohol or ether aromatic carbon (284.8-285.2 eV); (III) carbonyl groups (285.5-286.1 eV); (IV) carboxyl and ester groups (286.3-287.6 eV) and (V) a peak corresponding to -* transitions in the aromatic carbon (289.5-290.0 eV) [16,22]. The O1s spectrum was fitted to three components: (I ) C = O groups (530-531.6 eV); (II ) C-OH or C-O-C groups (532.7-533.3 eV) and (III') the last peak corresponding to chemisorbed oxygen (534.8-535.7 eV) [31].…”