title: Synthesis of monodispersed CMC-stabilized Fe-Cu bimetal nanoparticles for in situ reductive dechlorination of 1,2,4-trichlorobenzene.
abstract: Monodispersed carboxymethyl cellulose (CMC)-stabilized Fe-Cu bimetal nanoparticles with an average diameter of less than 20nm were successfully synthesized by a modified water-based approach. The as-resulting particles exhibit a core-shell structure and are quite uniform in size and shape. Batch experiments demonstrated that these nanoparticles could effectively dechlorinate 1,2,4-trichlorobenzene (1,2,4-TCB). Near 90% of reduction efficiency was achieved by CMC-stabilized Fe-Cu for 24h treatment. By monitoring the reaction products with time by GC-MS, it was found that 1,2,4-TCB transformation mainly followed the sequential hydrogenolysis to 1,2-dichlorobenzene (12DCB), then chlorobenzene (CB) and eventually benzene. The pseudo first order 1,2,4-TCB degradation rate were 0.09h(-1) and 0.06h(-1) as CMC-to-Fe molar ratios were 0.00248 and 0.00124, respectively. Dechlorination mechanism was also proposed in this study.
authors: Department of Chemistry, Beijing Institute of Technology, Beijing 100081, People's Republic of China.
authors: Jie
authors: J
authors: Cao
authors: Ruifeng
authors: R
authors: Xu
authors: Hua
authors: H
authors: Tang
authors: Suisi
authors: S
authors: Tang
authors: Minhua
authors: M
authors: Cao
mesh_terms: D002266:Carboxymethylcellulose Sodium / Q000737:chemistry*; D002722:Chlorobenzenes / Q000032:analysis / Q000737:chemistry*; D003300:Copper / Q000032:analysis / Q000737:chemistry*; D004785:Environmental Pollutants / Q000032:analysis / Q000737:chemistry; D052918:Environmental Restoration and Remediation / Q000379:methods; D054879:Halogenation; D007501:Iron / Q000032:analysis / Q000737:chemistry*; D053768:Metal Nanoparticles / Q000032:analysis / Q000737:chemistry*; D010316:Particle Size
chemical_list: D002722:Chlorobenzenes; D004785:Environmental Pollutants; C009947:1,2,4-trichlorobenzene; D003300:Copper; D007501:Iron; D002266:Carboxymethylcellulose Sodium