Degradation of the emerging contaminant ibuprofen in aqueous solution by gamma irradiation

Kinetic and mechanism investigation on the gamma irradiation induced degradation of endosulfan sulfate

“…The effects of inorganic anions, humic acid (HA), initial concentration of endosulfan sulfate and pH were investigated on the removal efficiency of endosulfan sulfate. The effects of pH of solution, HA and some of the inorganic anions have been investigated in previous studies, such as by Basfar et al (2009), Zheng et al (2011 and Zheng et al (2012). These studies investigated the effects of only few of these factors, besides their study was mainly concerned to hydroxyl radical based AOPs.…”

Radiation-Induced Degradation of Organic Compounds and Radiation Technologies for Purification of Aqueous Systems

“…Maximal yields of mineralization, like quoted earlier, are reached at sufficient concentration of dissolved oxygen that requires some time aerating the solution during irradiation [27]. Also, it has been noted repeatedly (see, e.g., [24,[28][29][30][31]) that the presence of inorganic anions, such as Cl In spite of low values of G miner , experimental data obtained (see, e.g., a review [32]) indicate that absorbed doses of several kilograys are sufficient to remove some hazardous pollutants, like pharmaceutical and personal care products, from contaminated water where the concentration of the pollutants is usually of the order of tens to hundreds μmol/L. It makes the process of radiation treatment of that kind promising for implementation.…”

Radiation induced degradation of antiepileptic drug primidone in aqueous solution

“…produce H Å (Eq. (5)) [35], then it decreases the reaction of e aq À and Å OH, with the increasing concentration of Å OH. However, in alkaline condition, Å OH and Å H are likely to react with OH À (Eqs.…”

“…(8) and (9)); O 2 can react with e aq À and Å H forming O 2 ÅÀ and peroxyl radicals (Eqs. (10) and (11)) [35], then decrease the reaction between e aq À and Å OH, thus increasing the concentration of Å OH in O 2 saturated solutions. Therefore, the Å OH plays a vital role in the PMD degradation.…”

“…The NO 2 À ion can act as a scavenger of Å OH, e aq À and Å H (Eqs. (32)(33)(34)(35)) with a rate constant of 6.0 Â 10 9 , 3.5 Â 10 9 and 7.1 Â 10 8 , respectively [33]. The temporary products, NO 2 Å and NO Å2À 2 , ith less oxidizability than Å OH and even continuing react with Å OH (NO 2 Å , shown in Eqs.…”