title: Enhanced adsorptive removal of naphthalene intermediates from aqueous solution by introducing reed straw into sewage sludge-based activated carbon.
abstract: The disposal of sewage sludge (SS) and reed straw (RS) has becoming a critical issue due to their rapid production. In this study, the SS-based activated carbon (SSC) was produced by introducing the RS as a component material. Properties including BET surface area, pore volume, surface chemical groups, and morphologies were characterized. The adsorption of 1-diazo-2-naphthol-4-sulfonic acid (1,2,4-Acid) and 2-Naphthol (2-Nap), which differs in their physicochemical properties, on as-prepared carbons were investigated. The overall adsorption was found to be jointly controlled by external mass transfer and intraparticle diffusion, and the optimal pH was found to be 5 due to their electrostatic attraction. Further study revealed that the SS- and RS-based carbons (SC and RSC, respectively) exhibited different adsorption behavior toward 1,2,4-Acid and 2-Nap. The calculated adsorption capacity from Langmuir–Freundlich model of SC and RSC for the two intermediates was 141.0, 84.6 mg g(-1) and 48.2, 110.2 mg g(-1), respectively, whereas their hybrid product (SSC) showed comparable capacity for 1,2,4-Acid (117.8 mg g(-1)), as well as higher capacity for 2-Nap (157.5 mg g-1). It was found that the presence of meso- or macropores facilitates the precipitation of mineral phases of inorganic substances during carbonization, attracting the molecules with polar functional groups, while the introduction of C-rich RS to SS enhances the adsorption of hydrophobic molecules
authors.forename: Lin
authors.initials: L
authors.lastname: Gu
authors.forename: Huaqing
authors.initials: H
authors.lastname: Guo
authors.forename: Pin
authors.initials: P
authors.lastname: Zhou
authors.forename: Nanwen
authors.initials: N
authors.lastname: Zhu
authors.forename: Daofang
authors.initials: D
authors.lastname: Zhang
authors.forename: Haiping
authors.initials: H
authors.lastname: Yuan
authors.forename: Ziyang
authors.initials: Z
authors.lastname: Lou
mesh_terms: D000327:Adsorption; D002606:Charcoal / Q000737:chemistry*; D004058:Diffusion; D009281:Naphthalenes / Q000032:analysis / Q000737:chemistry*; D012722:Sewage / Q000737:chemistry*; D014865:Waste Disposal, Fluid / Q000379:methods*; D014874:Water Pollutants, Chemical / Q000032:analysis / Q000737:chemistry*
chemical_list: D009281:Naphthalenes; D012722:Sewage; D014874:Water Pollutants, Chemical; D002606:Charcoal; C031721:naphthalene
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