Preparation of new adsorbent-supported Fe/Ni particles for the removal of crystal violet and methylene blue by a heterogeneous Fenton-like reaction

Jiwei Liu; Yufeng Du; Wuyang Sun; Quanchao Chang; Changsheng Peng

doi:10.1039/c9ra04710g

Preparation of new adsorbent-supported Fe/Ni particles for the removal of crystal violet and methylene blue by a heterogeneous Fenton-like reaction

RSC Adv. 2019 Jul 22;9(39):22513-22522. doi: 10.1039/c9ra04710g. eCollection 2019 Jul 17.

Authors

Jiwei Liu^{1

2}, Yufeng Du¹, Wuyang Sun¹, Quanchao Chang¹, Changsheng Peng^{1

3}

Affiliations

¹ The Key Lab of Marine Environmental Science and Ecology of Ministry of Education, Ocean University of China Qingdao 266100 China pcs005@ouc.edu.cn.
² School of Environment, Tsinghua University Beijing 100084 China.
³ School of Environmental and Chemical Engineering, Zhaoqing University Zhaoqing 526061 China.

Abstract

Prepared material-supported Fe/Ni particles (PM-Fe/Ni) were produced and applied as an adsorbent, reductant and Fenton-like catalyst for removing methylene blue (MB) and crystal violet (CV) from aqueous solutions. Fe/Ni particles were prepared by reducing ferric chloride with sodium borohydride and supported on the produced porous material. Various techniques including X-ray diffraction (XRD), Brunauer-Emmett-Teller (BET), Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy analysis (SEM) were employed to characterize the crystal phase, surface area, surface morphology and functional groups. Removal experiments were conducted to study the effects of different factors such as PM-Fe/Ni dosage, initial pH, H₂O₂ concentration, initial concentrations and temperature on MB and CV removal. The removal efficiency of CV and MB by PM-Fe/Ni/H₂O₂ were 91.86% and 61.41% under the conditions of dye concentration of 1000 mg L^-1, H₂O₂ concentration of 50 mM, PM-Fe/Ni dosage of 0.20 g and temperature of 293 K. The analysis of the degradation kinetics showed that the degradation of MB and CV followed well pseudo-first-order kinetics. A possible mechanism of removal of MB and CV was proposed, including the adsorption, reduction and dominating Fenton oxidation. The regeneration experiments of PM-Fe/Ni demonstrated that PM-Fe/Ni with H₂O₂ still showed a high removal efficiency after six reaction cycles.