نتایج جستجو برای: persulfate compound

تعداد نتایج: 128812  

Journal: :Environmental science & technology 2016
Bo Sun Jun Ma David L Sedlak

Perfluorooctanoic acid (PFOA) is a perfluorocarboxylic acid that is difficult to treat by most conventional methods. As a result, it is often removed from solution by adsorption on powdered activated carbon (PAC), followed by incineration of the spent carbon. To provide a new approach for treatment, PFOA was exposed to sulfate radicals (SO4(-•)) produced by thermolysis of persulfate (S2O8(2-)) ...

Journal: :Journal of environmental chemical engineering 2022

Removal of natural organic matter (NOMs) from actual water is a major challenge in the context worldwide pollution resources. The removal humic acids system combining biochar adsorption and ultrasonic persulfate oxidation was studied this paper. effects addition, concentration initial pH were investigated. A high rate up to 92.5% achieved for combined biochar/ultrasonic/persulfate system, versu...

پایان نامه :دانشگاه آزاد اسلامی - دانشگاه آزاد اسلامی واحد شاهرود - دانشکده علوم پایه 1393

چکیده : دو گیاه perovskia abrotanoides karel و zeravschania aucheri در سایه تحت جریان ملایم هوا خشک شدند. اسانس گیری از گیاهان خشک شده توسط دو روش تقطیر با آب و میکرواستخراج فاز جامد در فضای فوقانی انجام گرفت و اسانس ها با استفاده ار روش کروماتوگرافی گازی- طیف سنج جرمی (gc-ms) مورد تجزیه و تحلیل قرار گرفتند. ترکیبات عمده شناسایی شده در اسانس برگ و گل و ساقه گیاه p.abrotanoides عبارتند از: ...

ژورنال: طلوع بهداشت یزد 2015
احرامپوش, محمد حسن , انوری, فاطمه , جمشیدی, بهزاد, خیر خواه, منیره , دهواری, محبوبه , عسکری شاهی, محسن, قانعیان, محمدتقی,

Introduction: The most important affect of natural organic matters in water is their reaction with chlorine and producing of disinfection byproducts that are carcinogenic. Humic acid is most common natural organic materials of surface water. Advanced oxidation processes (AOPs) are methods for the removal of organics from aqueous solutions. Application of electron beam radiation is one of these ...

Journal: :Analytical sciences : the international journal of the Japan Society for Analytical Chemistry 2014
Jun Fan Ruiping Li Pingping Xu Junwei Di Yifeng Tu Jilin Yan

In this work, we synthesized a trypsin-stabilized fluorescent gold nanocluster. It was found that sulfide interacted with the nanocluster, which could result in significant fluorescence quenching. With this quenching effect, a fluorescence sulfide sensor was developed. This sensor responded linearly to sulfide in the range of 50 nM to 8 μM, and was capable of detecting sulfide as low as 5.5 nM....

Journal: :Molecules 2011
Yan Gong Lu Lin

The oxidative decarboxylation of levulinic acid (LA) by silver(I)/persulfate [Ag(I)/S₂O₈²⁻] has been investigated in this paper. The effects of buffer solution, initial pH value, time and temperature and dosages of Ag(I)/S₂O₈²⁻ on the decarboxylation of LA were examined in batch experiments and a reaction scheme was proposed on basis of the reaction process. The experimental results showed that...

Journal: :The Journal of biological chemistry 1951
N C GHOSH C DEB S BANERJEE

Various calorimetric methods of estimating epinephrine have been described by different workers using different chemical reagents such as potassium persulfate (I), mercuric chloride (2-4), potassium iodate (5), ammonium molybdate (6), diazobenzenesulfonic acid (7), and the ninhydrin test (8). None of the methods, however, is satisfactory for the estimation of epinephrine in blood. Some are not ...

Introduction and purpose: Soil contamination by petroleum is mostly resulted from oil exploration, refining processes, leaking of oil products from storage tanks, leaking from pipelines due to pipe friction and decay, refinery wastewater discharge and agricultural irrigation with such materials. Sodium persulfate (Na2S2O8), which is a chemical oxidant, could be activated in ...

ذوالقدر نسب, حسن, شعبانلو, امیر, صید محمدی, عبدالمطلب, لیلی, مصطفی, مهرعلی پور, جمال,

Background and purpose: In Electro/Fe2+/persulfate process, persulfate radicals are produced as powerful oxidizing agents which increase the efficiency of this process. The aim of this study was to investigate the efficiency removal of COD, TSS and dye from industrial effluent in Buali industrial area in Hamedan. Materials and methods: In this study, the batch experiment was performed using a ...

Journal: :Applied Catalysis B-environmental 2021

Abstract The role of high-valent Fe has rarely been explored in persulfate-based heterogeneous reaction. Herein, the existence Fe(IV) is verified a visible light-assisted FeTiO3/persulfate system using methyl phenyl sulfoxide as probe. FeTiO3/persulfate/light capable selectively degrading aromatic compounds with lower ionization potentials including tetracycline and bisphenol A by photo-generat...

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