Preparation and evaluation of activated carbons from lotus stalk with trimethyl phosphate and tributyl phosphate activation for lead removal
作者： Hai Liu , Peng Dai , Jian Zhang , Chenglu Zhang , Nan Bao
DOI: 10.1016/J.CEJ.2013.04.117
关键词:
摘要: Abstract The present research explored the feasibility of preparation activated carbons from lotus stalks (LS) by trimethyl phosphate (TMP) and tributyl (TBP) activations (producing AC-TMP AC-TBP) compared their physiochemical Pb(II) adsorptive properties with carbon (AC-PPA) obtained phosphoric acid (PPA) activation LS. were characterized N 2 adsorption/desorption, Boehm’s titration, FTIR XPS. Physical chemical analysis results indicated that TMP TBP dramatically enhanced S BET concentrations O-containing surface functional groups AC-TBP to (LS-C) derived pyrolysis displayed much less than AC-PPA, but they contained higher acidic on surfaces. adsorption capacities also investigated at different contact times, pHs, ionic strengths initial concentrations. equilibrium data well fitted Freundlich model. maximum (240.6 mg/g) (229.1 mg/g) AC-PPA (139.0 mg/g), resulting content could adsorb more species electrostatic attraction, cation exchange complexation.
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