Abstract
Under the guidance of the idea of “treating waste with waste”, copper-loaded carbon-based catalysts were prepared in situ using waste chelating resin with adsorbed copper. The effect of the catalyst activation temperature on dye brilliant red (X-3B) degradation was investigated and the characterization of the catalysts was analyzed. The results show that a catalyst activated at 800 °C (Cu-AC-800) has the largest specific surface area and abundant pore structure and the highest proportion of Cu under low valence states, which leads to the best performance in adsorbing and degrading X-3B. The influences of operation conditions and inorganic salt anions on persulfate (PS) activation were also investigated. Moreover, the degradation mechanism was preliminarily explored by quenching reactions. The main active free radicals in the system were determined as sulfate radicals (•SO4−). Given its use in solid waste recycling, copper-loaded carbon-based catalyst may provide some new insights for the remediation of wastewater.
Highlights
As one of the four main kinds of industrial wastewater, dye wastewater has been widely concerning due to its extremely complex composition and high proportion of organic pollutants [1,2]
Owing to rapid and thorough oxidation, adaptability of wide pH range, and easy storage and transportation of oxidants, activated persulfate (PS) advanced oxidation technology has attracted researchers’ attention [3,4,5,6]. It mainly relies on sulfate radicals (SO4 − ) to degrade organic pollutants
X-ray diffraction (XRD) patterns were obtained on a Bruker AXS-D8 Advance model system using
Summary
As one of the four main kinds of industrial wastewater, dye wastewater has been widely concerning due to its extremely complex composition and high proportion of organic pollutants [1,2]. It is necessary to apply chemical methods for advanced treatment of dye wastewater. Owing to rapid and thorough oxidation, adaptability of wide pH range, and easy storage and transportation of oxidants, activated persulfate (PS) advanced oxidation technology has attracted researchers’ attention [3,4,5,6]. It mainly relies on sulfate radicals (SO4 − ) to degrade organic pollutants. Common persulfate activation technologies include thermal activation [7,8], light activation [5,9,10], activated carbon activation [11,12], and transition metal activation [8,13]
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