title: Adsorption mechanism of sodium dodecyl benzene sulfonate on carbon blacks by adsorption isotherm and zeta potential determinations.
abstract: Surfactant solutions were propounded to remove fine and hydrophobic carbon black particles from coal-fired flue gas. The adsorption mechanisms between sodium dodecyl benzene sulfonate (SDBS, an anionic surfactant) and carbon black particles in suspension were investigated. The influence of inorganic salt (NaCl) was also considered. As results showed, hydrophobic interactions contributed to the strong adsorption between SDBS and carbon black particles in the absence of NaCl, and adding NaCl affected the adsorption process. The adsorption amount of SDBS significantly increased when NaCl was added into the SDBS solution; however, when SDBS was in low concentration, the amount of adsorbed SDBS, which was responsible for the shift of zeta potentials, varied little under different concentrations of NaCl. This indicated that the adsorption of SDBS was mainly caused by hydrophobic interaction and Na+ could not change the adsorption of SDBS on adsorption site when SDBS was in low concentration. Moreover, the adsorbed SDBS and Na+ were retained in the Stern layer.
authors.affiliation: College of Environmental Science and Engineering, Hunan University, Changsha, China.
authors.forename: Yapei
authors.initials: Y
authors.lastname: Zhao
authors.forename: Pei
authors.initials: P
authors.lastname: Lu
authors.forename: Caiting
authors.initials: C
authors.lastname: Li
authors.forename: Xiaopeng
authors.initials: X
authors.lastname: Fan
authors.forename: Qingbo
authors.initials: Q
authors.lastname: Wen
authors.forename: Qi
authors.initials: Q
authors.lastname: Zhan
authors.forename: Xin
authors.initials: X
authors.lastname: Shu
authors.forename: Tieliang
authors.initials: T
authors.lastname: Xu
authors.forename: Guangming
authors.initials: G
authors.lastname: Zeng
mesh_terms: D000327:Adsorption; D000393:Air Pollutants / Q000302:isolation & purification*; D001557:Benzenesulfonates / Q000737:chemistry*; D002244:Carbon / Q000302:isolation & purification*; D012965:Sodium Chloride / Q000737:chemistry; D053260:Soot / Q000302:isolation & purification*; D013501:Surface-Active Agents / Q000737:chemistry*; D013816:Thermodynamics
chemical_list: D000393:Air Pollutants; D001557:Benzenesulfonates; D053260:Soot; D013501:Surface-Active Agents; D012965:Sodium Chloride; C001114:dodecylbenzenesulfonic acid; D002244:Carbon