文献类型：期刊文献

英文题名：Removal of p-Nitrophenol from simulated sewage using steel slag: Capability and mechanism

作者：Zhao, Yibo[1];Wang, Lin[2];Zhu, Linchao[1];Gao, Fei[1];Xu, Xinru[1];Yang, Jingyi[1]

机构：[1]East China Univ Sci & Technol, Int Joint Res Ctr Green Energy Chem Engn, Meilong Rd 130, Shanghai 200237, Peoples R China;[2]Shanghai Baosteel New Bldg Mat Technol Co LTD, Mohe Rd 301, Shanghai 201900, Peoples R China

年份：2022

卷号：212

外文期刊名：ENVIRONMENTAL RESEARCH

收录：;EI(收录号：20242616391371);WOS:【SCI-EXPANDED(收录号:WOS:000810168700003)】；

语种：英文

外文关键词：p-Nitrophenol; Steel slag; Adsorption

摘要：The steel slag was investigated for the removal of p-nitrophenol (4-NP) from simulated sewage by batch adsorption and fixed-bed column absorption experiments. The results showed that the maximum adsorption capacity was 109.66 mg/g at 298 K, pH of 7, initial concentration 100 mg/L, and dose 0.8 g/L. The adsorption process fitted the Langmuir isothermal adsorption model and followed pseudo-second-order kinetic models, the activation energy of adsorption (Ea) was 10.78 kJ/mol, which indicated that the adsorption was single-molecule layer physical adsorption. The regeneration efficiency was still maintained at 84.20% after five adsorptiondesorption cycles. The column adsorption experiments showed that the adsorption capacity of the Thomas model reached 13.69 mg/g and the semi-penetrating time of the Yoon-Nelson model was 205 min at 298 K. Fe3O4 was identified as the main adsorption site by adsorption energy calculation, XRD and XPS analysis. The FTIR, Zeta potential, and ionic strength analysis indicated that the adsorption mechanism was hydrogen bonding interaction and electrostatic interaction. This work proved that steel slag could be utilized as a potential adsorbent for phenol-containing wastewater treatment.