Fabrication of pollution-free coal gangue-based catalytic material utilizing ferrous chloride as activator for efficient peroxymonosulfate activation  

作　　者：Zhiming Sun Xinlin Wang Shaoran Jia Jialin Liang Xiaotian Ning Chunquan Li 

机构地区：[1]School of Chemical and Environmental Engineering,China University of Mining and Technology(Beijing),Beijing,100083,China [2]Key Laboratory of Coal Processing and Efficient Utilization,(China University of Mining and Technology),Ministry of Education,Xuzhou,221116,China

出　　处：《International Journal of Coal Science & Technology》2024年第1期103-118,共16页国际煤炭科学技术学报（英文）

基　　金：National Key R&D Program of China(2019YFC1904903 and 2020YFC1806504);China Postdoctoral Science Foundation(2020M680757);Fundamental Research Funds for the Central Universities(2022XJHH08).

摘　　要：Novel coal gangue-based persulfate catalyst(CG-FeCl_(2))was successfully synthesized by the means of calcinating under nitrogen atmosphere with the addition of ferrous chloride tetrahydrate(FeCl_(2)·_(4)H_(2)O).The phase transformation of the prepared materials and gas products during the heating process are thoroughly investigated.It is suggested that ferrous chloride participated in the phase transformation and formed Si-O-Fe bonds.And the main gaseous products are H_(2)O,H_(2),and HCl during the heating process.Besides,the ability of CG-FeCl_(2) to activate peroxymonosulfate(PMS)for catalytic degradation of polycyclic aromatic hydrocarbons(PAHs)and phenol was deeply studied.More than 95%of naphthyl,phenanthrene and phenol were removed under optimizied conditions.In addition,1O_(2),·OH,and SO_(4)·−were involved in the CG-FeCl_(2)/PMS system from the free radical scavenging experiment,where 1O_(2) played a major role during the oxidation process.Furthermore,CG-FeCl_(2)/PMS system exhibited superior stability in a relatively wide pH range and the presence of common anion from related degradation experiments.Overall,the novel CG-FeCl_(2) is an efficient and environmentally friendly catalyst,displaying potential application prospect in the field of PAHs and phenol-contaminated wastewater treatment.

关 键 词：Coal gangue Persulfate activation Advanced oxidation processes Polycyclic aromatic hydrocarbons Phenol Ferrous chloride 

分 类 号：O64[理学—物理化学]