文献类型：期刊文献

英文题名：Removal of Azo Dyes Reactive Brilliant Red X-3B by Zero-Valent Iron Enhanced by a Weak Magnetic Field: Efficiency and Mechanism

作者：Liang, Liping[1,2];Wu, Qian[1];Xue, Yuanyuan[1];Xi, Fenfen[2];Wang, Qian[1];Zhang, Yuting[1];Cheng, Liubiao[1];Meng, Xu[3]

机构：[1]Shaoxing Univ, Sch Civil Engn, Shaoxing 312000, Peoples R China;[2]Shaoxing Univ, Coll Life Sci, Shaoxing 312000, Peoples R China;[3]Shaoxing Univ, Coll Text & Garment, Shaoxing 312000, Peoples R China

年份：2020

卷号：146

期号：10

外文期刊名：JOURNAL OF ENVIRONMENTAL ENGINEERING

收录：SCI-EXPANDED(收录号：WOS:000601261900002)、、EI(收录号：20203309049481)、Scopus(收录号：2-s2.0-85089273798)、WOS

基金：This work was supported by the he National Natural Science Foundation of China under Grant 41807468, Zhejiang Provincial Natural Science Foundation of China under Grant LY18E080018, Shaoxing Public Welfare Project under Grant 2017B70042, National Innovation and Entrepreneurship Training Program for College Students under Grant 201810349008, University Students' Science and Technology Innovation Program of Zhejiang Province (Young Talents Program) under Grant 2018R432004, and State Key Laboratory of Pollution Control and Resource Reuse Foundation under Grant PCRRF18021.

语种：英文

外文关键词：Zero-valent iron; Weak magnetic field; Azo dyes; Brilliant Red X-3B

外文摘要：The removal kinetics and mechanism of azo dye Reactive Brilliant Red X-3B (X-3B) by a weak magnetic field (WMF)-enhanced zero-valent iron (ZVI) were explored. The results show that the reaction rate of zero-valent iron removal of X-3B was greatly enhanced by the weak magnetic field, and the removal rate increased with the decreasing of pH and initial dye concentration, and increased with the increasing temperature and ZVI dosage. The effect of common coexisting ions was also studied. In the presence of a magnetic field, NO3-, Ca2+, and Mg2+ had certain inhibitory effects on the reaction, while anions CO32-, SO42-, ClO4-, Cl-, HCO3-, and PO43- could significantly promote the removal of dye. In contrast, all kinds of anions and cations could promote the reaction without a magnetic field. Expect these, the degradation process was consistent with the pseudo-first-order kinetic model by fitting the experimental data. The activation energy ware 25.7368 kJ mol(-1) in the presence of WMF and 27.9317 kJ mol-1 in the absence of WMF by using the Arrhenius formula. The degradation process was further analyzed by ultraviolet-visible (UV-Vis) spectroscopy, scanning electron microscopy (SEM), and X-ray diffraction (XRD). The main mechanism of this reaction involves free radical oxidation, and the main reaction products were lepidocrocite and Fe(OH)(3).