Enhancement effect of carbon adsorbent on ozonation of aqueous phenol

Phenol removal from aqueous solution using silica and activated carbon derived from rice husk

“…The US Environmental Protection Agency has identified phenol in the group of top pollutants and set the limit for phenol in industrial wastewater that is discharged into rivers as less than 0.1 mgL À1 . This organization has also reported that the presence of more than 1 mgL À1 of phenol in aquatic environments will have a significant impact on aquatic life (Chaichanawong et al 2010). Different methods, such as biological removal, chemical oxidation, photocatalytic oxidation, electrochemical oxidation, the ozonation process, ion exchange, and so on, can be used to remove phenol (Cherifi et al 2009;Daffalla et al 2010;El-Naas et al 2010;Liu et al 2010;Khosravi et al 2013;Mohammad et al 2014;Biglari et al 2016).…”

“…Phenol and its derivatives are among compounds that have been classified as toxic pollutants due to their toxic nature and potentially dangerous effects on human health and the environment, and hence have attracted the attention of many environmentalists (Chaichanawong et al 2010;Rahmani et al 2011;Asmaly et al 2015). Phenol (chemical formula C 6 H 5 OH), which is an aromatic hydrocarbon and a benzene derivative with a very high water solubility, is one of the most commonly used organic compounds in the production process of many industries, such as pharmaceuticals, resin synthesis, plastics, paper, refineries, petrochemicals, leather etc.…”

Application of a Combined Adsorption−Ozonation Process for Phenolic Wastewater Treatment in a Continuous Fixed-Bed Reactor

“…The adsorptive characteristics of the GAC at different pH conditions between 3.0 and 11.0 are shown in Figure 2. All phenol adsorption isotherms in Figure 2a were fitted by the empirical Freundlich multilayer adsorption model, which assumes the existence of interactions between the adsorbed molecules on the adsorbent [39]. Figure 2b shows the adsorption kinetic profiles fitted to a pseudo-second order model, which assumes that the chemical reaction is significant.…”

“…However, no significant improvement was observed in the catalytic activities of the AC and the other three composites in terms of TOC reduction, which was about 90% after 5 h of reaction. Chaichanawong et al [39] degraded an aqueous solution containing phenol in a slurry-type reactor, via a catalytic ozonisation process with three ACs with different physico-chemical properties. With a mesoporous carbon, the complete degradation of phenol and a mineralisation of 85.7% were obtained during the ozonisation and simultaneous adsorption process over 2 h. Guelli Ulson de Souza et al [6] studied the simultaneous application of ozonation and adsorption processes in a packed bed of AC for the removal of phenol from an industrial stream.…”

Aerobic Biodegradation Coupled to Preliminary Ozonation for the Treatment of Model and Real Residual Water

“…Several mixed processes have been recently proposed including a process based on chemical oxidative compounds plus biological based decomposition course [12][13][14][15][16][17][18]. Among others, oxygen injected with high pressure, ozonation [13], catalytic and photocatalytic processes and others have been tested to perform the chemical decomposition [16][17][18]. Most of these treatment methods have important advantages but also have important drawbacks.…”