A combined photolytic–electrolytic system for the simultaneous recovery of copper and degradation of phenol or 4-chlorophenol in mixed solutions

Abstract

The effects of the presence of copper on the photooxidation of phenol and 4-chlorophenol and of the presence of the phenols on the recovery of copper by electrodeposition are studied in three systems: a photolytic cell in the presence and absence of TiO 2 as a catalyst or H 2 O 2 as an oxidant; an electrolytic cell and a combined photolyticelectrolytic system. The optimum system for the simultaneous removal of copper and destruction of the phenols which overcomes the effects of copper-phenol reactions is a combined system with concentrator electrode technology incorporated into the electrolytic cell. This combined system achieves > 99% removal of copper and destruction of phenol or 4-chlorophenol in an 8 h period.

Heterogeneous Fenton oxidation of catechol and 4-chlorocatechol catalyzed by nano-Fe3O4: Role of the interface

“…The observed faster degradation of chlorinated catechol than catechol was opposite to the refractory of chlorophenols than phenols [27]. Similar reverse degradable laws of chlorocatechols and chlorophenols were also observed by Cheng et al [10].…”

Highly sensitive detection of 2,4,6-trichlorophenol based on HS-β-cyclodextrin/gold nanoparticles composites modified indium tin oxide electrode

“…Therefore, for human health safety and environmental protection purposes, it is of great significance to develop simple, rapid and sensitive analytical methods to identify and quantify of CPs in environmental samples. CPs have traditionally been detected using high performance liquid chromatography [13,14] and gas chromatography with mass spectrometry [15,16], which offer powerful trace analysis with high reproducibility and very low detection limits. However, these techniques involve extraction of large volumes of water, require extensive purification, demand qualified personnel and expensive equipment [17,18].…”

Soft hydrogels for dual use: Template for metal nanoparticle synthesis and a reactor in the reduction of nitrophenols

“…These pollutants cause severe health problems on human and ecosystems; consequently, these materials must be removed to improve water quality and the environment. Amongst these pollutants, especially phenols and their derivatives are important contaminants in wastewater because of their high toxicity, carcinogenic nature, high oxygen demand and low biodegradability [31]. 4-NP and 2-NP are the two phenol derivatives and widely used in production of insecticide, fungicide and dyes.…”