title: Selective conversion of organic pollutant p-chlorophenol to formic acid using zeolite Fenton catalyst.
abstract: Effective remediation technologies which can converse the harmful organic pollutants to high-value chemicals are crucial both for wastewater treatment and energy regeneration. This study provides an evidence that extracting useful chemicals from wastewater is feasible through selective conversion of p-chlorophenol to high value formic acid as an example. The reported system works with a readily available Fe-containing ZSM-5 catalyst, water as the solvent and hydrogen peroxide as the oxidant. The yield of formic acid reached up to 50.7% when the Si/Al ratio of ZSM-5 was 80 and the Fe-content was 1.4%. By X-ray adsorption fine structure (XAFS), NH3 temperature-programmed desorption (NH3-TPD) technique, the pyridine adsorption Fourier-transition infrared (Py-IR) spectroscopy and adsorption measurements, it was concluded that the controllable degradation of p-CP could be approached through selective adsorption, the moderate Brønsted acid sites for H2O2 activation and the properly selective conversion control due to extra-framework coordination unsaturated sites (CUS) of Fe. This approach might provide a new avenue for the field of organic pollutant remediation.
authors.affiliation: College of Environmental Science and Engineering, Donghua University, Shanghai, 201620, China; Institute of Environmental Science, Zhejiang University, Hangzhou, 310058, China.
authors.forename: Chensi
authors.initials: C
authors.lastname: Shen
authors.affiliation: Institute of Environmental Science, Zhejiang University, Hangzhou, 310058, China.
authors.forename: Jianqing
authors.initials: J
authors.lastname: Ma
authors.affiliation: Institute of Environmental Science, Zhejiang University, Hangzhou, 310058, China.
authors.forename: Wanpeng
authors.initials: W
authors.lastname: Liu
authors.affiliation: Institute of Environmental Science, Zhejiang University, Hangzhou, 310058, China. Electronic address: wenyuezhong@zju.edu.cn.
authors.forename: Yuezhong
authors.initials: Y
authors.lastname: Wen
authors.affiliation: College of Environmental Science and Engineering, Donghua University, Shanghai, 201620, China.
authors.forename: Sadia
authors.initials: S
authors.lastname: Rashid
mesh_terms: D000327:Adsorption; D002384:Catalysis; D002733:Chlorophenols / Q000737:chemistry*; D052918:Environmental Restoration and Remediation / Q000379:methods; D005561:Formates / Q000302:isolation & purification*; D006861:Hydrogen Peroxide / Q000737:chemistry*; D007501:Iron / Q000737:chemistry*; D016877:Oxidants / Q000737:chemistry*; D062065:Wastewater / Q000737:chemistry*; D017641:Zeolites / Q000737:chemistry*
chemical_list: D002733:Chlorophenols; D005561:Formates; D006861:Hydrogen Peroxide; D007501:Iron; D016877:Oxidants; D062065:Wastewater; D017641:Zeolites; C045076:Fenton's reagent; C030544:formic acid; C029107:4-chlorophenol
keywords: Catalyst; Fenton-like reaction; Resource; Selective conversion