文献类型：期刊文献

英文题名：Efficient removal of trichloroethylene in surfactant amended solution by nano Fe⁰-Nickel bimetallic composite activated sodium persulfate process

作者：Shan, Ali[1,2];Farooq, Usman[3];Lyu, Shuguang[1,4];Zaman, Waqas Qamar[5];Abbas, Zain[1];Ali, Meesam[1,6];Idrees, Ayesha[1];Tang, Ping[1];Li, Ming[1];Sun, Yong[1];Sui, Qian[1,4]

机构：[1]East China Univ Sci & Technol, State Environm Protect Key Lab Environm Risk Asse, Shanghai 200237, Peoples R China;[2]Univ Lahore, Dept Environm Sci, Lahore 46000, Pakistan;[3]Henan Univ, Coll Chem & Chem Engn, Kaifeng 475000, Peoples R China;[4]Shanghai Inst Pollut Control & Ecol Secur, Shanghai 200092, Peoples R China;[5]Natl Univ Sci & Technol NUST, Sch Civil & Environm Engn, Inst Environm Sci & Engn, Sect H-12, Islamabad 44000, Pakistan;[6]Muhammad Nawaz Sharif Univ Engn & Technol, Dept Chem Engn, Multan 60000, Pakistan

年份：2020

卷号：386

外文期刊名：CHEMICAL ENGINEERING JOURNAL

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000551889900020)】；

基金：This study was financially supported by National Key R&D Program of China (No. 2018YFC1802500).

语种：英文

外文关键词：Trichloroethylene; nZVI-Ni composite; Sodium persulfate; Surfactants; Groundwater remediation

摘要：Trichloroethylene (TCE) is chloride organic solvent used in industrial process and frequently detected as one of contaminants in groundwater. In present study, nano zero valent iron-nickel composite (nZVI-Ni) was prepared successfully by ion exchange process and investigated as a proficient sodium persulfate (SPS) activator for the removal of TCE in Fenton-like oxidation system. The physico-chemical characteristics, structure, and surface morphology of the prepared nZVI-Ni nanocomposite was analyzed through energy dispersive spectroscopy (EDS), scanning electron microscopy (SEM), N-2 adsorption-desorption, transition electron microscopy (TEM), X-ray diffractometry (XRD) and X-ray photoelectron spectroscopy (XPS). The experimental results obtained from batch tests in lab showed that more than 95% of TCE could be removed efficiently at nZVI-Ni/SPS/TCE molar ratio of 4/4/1 within 120 min at 20 degrees C. Further scavenging tests were designed to examine the presence of HO%, SO4 center dot- and O-2(-center dot) radicals and verified the major role of HO center dot radical in the nZVI-Ni/SPS system for the complete removal of TCE. Moreover, the generation of HO center dot radicals in the system was confirmed through electrons paramagnetic resonance (EPR) of nZVI-Ni composite. The influence of surfactants on TCE removal was tested and the results showed that the percentage removal of TCE was recorded as 97.75%, 95.63% and 77.50% in the presence of Tween-80, BRIJ-35 and TX-100 surfactants at the nZVI-Ni/SPS/TCE molar ratio of 80/80/1, respectively. Results of TCE degradation in real groundwater revealed that nZVI-Ni can be applicable and is a promising catalyst for TCE removal in in-situ chemical oxidation (ISCO) practice. In Summary, these significant findings strongly demonstrate the feasibility and potential of nZVI-Ni activated SPS process as an alternative technique for TCE contaminated groundwater remediation.