A novel recycling way of blast furnace dust from steelworks: Electrocoagulation coupled micro-electrolysis system in indigo wastewater treatment

Jiaran Guo; Yang Zhang; Haitao Wen; Hui Jia; Jie Wang

doi:10.1016/j.chemosphere.2023.138416

A novel recycling way of blast furnace dust from steelworks: Electrocoagulation coupled micro-electrolysis system in indigo wastewater treatment

Chemosphere. 2023 Jun:327:138416. doi: 10.1016/j.chemosphere.2023.138416. Epub 2023 Mar 28.

Authors

Jiaran Guo¹, Yang Zhang², Haitao Wen³, Hui Jia⁴, Jie Wang⁵

Affiliations

¹ State Key Laboratory of Separation Membranes and Membrane Processes, Tiangong University, Tianjin, 300387, China; School of Environmental Science and Engineering, Tiangong University, Tianjin, 300387, China; Cangzhou Institute of Tiangong University, Tiangong University, Cangzhou, 061000, China.
² State Key Laboratory of Separation Membranes and Membrane Processes, Tiangong University, Tianjin, 300387, China; School of Environmental Science and Engineering, Tiangong University, Tianjin, 300387, China.
³ State Key Laboratory of Separation Membranes and Membrane Processes, Tiangong University, Tianjin, 300387, China; Cangzhou Institute of Tiangong University, Tiangong University, Cangzhou, 061000, China.
⁴ State Key Laboratory of Separation Membranes and Membrane Processes, Tiangong University, Tianjin, 300387, China; School of Environmental Science and Engineering, Tiangong University, Tianjin, 300387, China; Cangzhou Institute of Tiangong University, Tiangong University, Cangzhou, 061000, China. Electronic address: jiahui@tiangong.edu.cn.
⁵ State Key Laboratory of Separation Membranes and Membrane Processes, Tiangong University, Tianjin, 300387, China; School of Environmental Science and Engineering, Tiangong University, Tianjin, 300387, China; Cangzhou Institute of Tiangong University, Tiangong University, Cangzhou, 061000, China. Electronic address: wangjie@tiangong.edu.cn.

PMID: 36996917
DOI: 10.1016/j.chemosphere.2023.138416

Abstract

In this study, a novel electrocoagulation electrode, based on blast furnace dust (BFD) from steelworks waste, was prepared for indigo wastewater treatment, and the performance was compared with different ratios of Fe-C composite electrodes. The BFD electrode exhibited great electrochemical performance and removal effect. The presence of Fe-C micro-electrolysis in the electrocoagulation system of the BFD electrode was demonstrated by FT-IR, Raman, ESR, and quenching experiments. Density Functional Theory (DFT) calculations further demonstrated that the iron-carbon ratio could influence the degree of O-O breaking and enhance ·OH generation. Finally, the BFD electrode's operating parameters were perfected, and the COD removal and decolorization could reach 75.7% and 95.8% within 60 min, respectively. Fe-C composite electrodes reduce energy consumption compared with the traditional Fe/Al electrode and have a lower production cost, which provides a potential way to recycle and reuse the resources of solid waste in steelworks, the concept of "waste controlled by waste" is realized.

Keywords: Blast furnace dust (BFD); Electrocoagulation; Indigo wastewater; Micro-electrolysis.

MeSH terms

Electrocoagulation
Electrodes
Electrolysis
Hydrogen-Ion Concentration
Indigo Carmine* / analysis
Indigo Carmine* / chemistry
Industrial Waste / analysis
Spectroscopy, Fourier Transform Infrared
Waste Disposal, Fluid*
Wastewater*
Water Pollutants, Chemical* / analysis
Water Pollutants, Chemical* / chemistry
Water Purification

Substances

Indigo Carmine
Industrial Waste
Wastewater
Water Pollutants, Chemical