Efficient ozonation of reverse osmosis concentrates from petroleum refinery wastewater using composite metal oxide-loaded alumina

Chen, Yu; Chen, Chunmao; Yoza, Brandon A.; Li, Qing X.; Guo, Shaohui; Ping, Wang; Shen, Dong; Wang, Qinghong

doi:10.1007/s12182-017-0178-x

Cited by 4 publications

(1 citation statement)

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“…What is more, tropospheric ozone as a greenhouse gas exacerbates global warming (Shindell et al 2012). Nowadays, owing to its powerful oxidizing ability, ozone is widely applied in waste water treatment (Chen et al 2017;Destaillats et al 2008), sterilization and disinfection (Lin et al 2016) and air purification (Mitchell et al 2011;Yang et al 2009), which leads to serious levels of ozone residues. Ozone can be released by much electrical equipment during discharge processes (Dhandapani and Oyama 1997) or oxygen irradiated by ultraviolet light (Zhu et al 2017).…”

Section: Introductionmentioning

confidence: 99%

Highly active OMS-2 for catalytic ozone decomposition under humid conditions

et al. 2019

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Four kinds of cryptomelane-type octahedral molecular sieve (OMS)-2-X (the X represents the molar ratio of KMnO 4 / MnAc 2) were prepared as catalytic materials for ozone decomposition through a one-step hydrothermal reaction of KMnO 4 and MnAc 2 , by changing their molar ratios. These samples were characterized by N 2 adsorption-desorption, X-ray diffraction (XRD), transmission electron microscopy (TEM), scanning electron microscopy (SEM), temperature programmed reduction by H 2 (H 2-TPR) and X-ray photoelectron spectroscopy (XPS). Among them, the OMS-2-0.7 sample showed the best O 3 conversion of 92% under high relative humidity (RH) of 90% and gas hourly space velocity of 585,000 h −1. This was accordingly thought as a possible way for purifying ozone-containing waste gases under high RH atmospheres. The efficiency of ozone decomposition of the prepared OMS-2-X sample was found to be related to specific surface area, particle size, surface oxygen vacancies, and Mn 3+ cation amounts. The one-step hydrothermal synthesis was shown to be a simple method to prepare the considerably active OMS-2 solids for ozone decomposition.

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