Chinese Journal of Catalysis

Chinese Journal of Catalysis ›› 2016, Vol. 37 ›› Issue (1): 135-145.DOI: 10.1016/S1872-2067(15)61010-5

• Articles • Previous Articles     Next Articles

Oxidation of 4-chloro-3-methylphenol using zeolite Y-encapsulated iron(III)-, nickel(II)-, and copper(II)-N,N'-disalicylidene- 1,2-phenylenediamine complexes

Solomon Legese Hailua,b, Balachandran Unni Naira, Mesfin Redi-Abshirob, Isabel Diazb,c, Rathinam Aravindhana, Merid Tessemab   

  1. a Chemical Laboratory, CSIR-Central Leather Research Institute, Adyar, Chennai 600 020, India;
    b Department of Chemistry, Addis Ababa University, P.O. Box 1176, Addis Ababa, Ethiopia;
    c Instituto de Catálisis y Petroleoquímica, ICP-CSIC, C/Marie Curie 2, 28049 Cantoblanco, Madrid, Spain
  • Received:2015-08-11 Revised:2015-11-06 Online:2015-12-26 Published:2015-12-26
  • Contact: Balachandran Unni Nair

PDF (PC)

661

Abstract:

The degradation of 4-chloro-3-methylphenol (PCMC) using zeolite-encapsulated iron(III), nickel(II), and copper(II) complexes of N,N'-disalicylidene-1,2-phenylenediamine as catalysts, in a heterogeneous Fenton-like advanced oxidation process, was studied. The physicochemical properties of the catalysts were determined using powder X-ray diffraction, thermogravimetric analysis, Brunauer-Emmett-Teller surface area analysis, Fourier-transform infrared spectroscopy, elemental analysis, and scanning electron microscopy. The effects of four factors, namely initial H2O2 concentration, catalyst dosage, temperature, and pH, on the degradation of a model organic pollutant were determined. The results show that at low acidic pH, almost complete removal of PCMC was achieved with the iron(III), nickel(II), and copper(II) catalysts after 120 min under the optimum reaction conditions: catalyst dosage 0.1 g, H2O2 concentration 75 mmol/L, initial PCMC concentration 0.35 mmol/L, and 50 ℃. The reusability of the prepared catalysts in PCMC degradation was also studied and a possible catalyst deactivation mechanism is proposed. The possible intermediate products, degradation pathway, and kinetics of PCMC oxidation were also studied.

Key words: Ship-in-a-bottle method, 4-Chloro-3-methylphenol, Pseudo-first order, Deactivation, Hydroxyl radical