title: [Effects of Pb(NO3)2 and cetylpyridinium chloride on sorption of p-nitrophenol by sediment].
abstract: Sorption behavior of p-nitrophenol by sediment in the presence of both cetylpyridinium chloride (CPC) and Pb(NO3)2 were investigated. The concurrence of Pb(NO3)2 inhibited the enhancement of sorption induced by CPC. The removal effect of pnitrophenol from sediment by compounding of CPC and Pb(NO3)2 presented antagonistic effect. At a given concentration of CPC, the antagonistic effect increased with increasing of the initial concentration of Pb(NO3)2. The antagonistic effect was also dependent on CPC concentrations. At the initial concentration below 3000 mg/L(the equilibrium concentration was below CMC), the antagonistic effect was especially significant. With the increase of the concentration of CPC, the antagonistic effect decreased gradually. Especially at the higher concentration above CMC, the effect went to be an independent effect just induced by CPC. In addition, the study also indicate that Pb2+ and CPC may not compete for the same adsorption sites.
authors.affiliation: Department of Environmental Science, Zhejiang University, Hangzhou 310028, China. nancyxiaoxi@sohu.com
authors.forename: Shan-ting
authors.initials: ST
authors.lastname: Ying
authors.forename: Wen-fei
authors.initials: WF
authors.lastname: Huang
authors.forename: Li-yuan
authors.initials: LY
authors.lastname: Tian
authors.forename: Xue-you
authors.initials: XY
authors.lastname: Shen
mesh_terms: D000327:Adsorption; D002594:Cetylpyridinium / Q000737:chemistry*; D019015:Geologic Sediments / Q000737:chemistry*; D007854:Lead / Q000737:chemistry*; D009566:Nitrates / Q000737:chemistry*; D009596:Nitrophenols / Q000032:analysis* / Q000737:chemistry; D013501:Surface-Active Agents / Q000737:chemistry; D014874:Water Pollutants, Chemical / Q000032:analysis* / Q000737:chemistry
chemical_list: D009566:Nitrates; D009596:Nitrophenols; D013501:Surface-Active Agents; D014874:Water Pollutants, Chemical; D007854:Lead; C017461:lead nitrate; D002594:Cetylpyridinium; C024836:4-nitrophenol