Photochemical Formation of Hydroxyl Radical from Effluent Organic Matter: Role of Composition

2013 ◽  
Vol 47 (21) ◽  
pp. 12073-12080 ◽  
Author(s):  
Eunkyung Lee ◽  
Caitlin M. Glover ◽  
Fernando L. Rosario-Ortiz
Keyword(s):  
Organic Matter ◽  
Hydroxyl Radical ◽  
Effluent Organic Matter ◽  
Photochemical Formation

Role of effluent organic matter in the photochemical degradation of compounds of wastewater origin

2017 ◽  
Vol 110 ◽  
pp. 170-179 ◽  
Author(s):  
Laleen C. Bodhipaksha ◽  
Charles M. Sharpless ◽  
Yu-Ping Chin ◽  
Allison A. MacKay
Keyword(s):  
Organic Matter ◽  
Photochemical Degradation ◽  
Effluent Organic Matter

Role of Al-based coagulants on a hybrid ozonation–coagulation (HOC) process for WWTP effluent organic matter and ibuprofen removal

2019 ◽  
Vol 5 (3) ◽  
pp. 599-608 ◽  
Author(s):  
Xin Jin ◽  
Yong Shi ◽  
Rui Hou ◽  
Weijie Zhang ◽  
Pengkang Jin ◽  
...  
Keyword(s):  
Organic Matter ◽  
Effluent Organic Matter ◽  
Chain Reactions ◽  
Wwtp Effluent

The hydrolysing Al-based coagulants acted more like promoters for the generation of ˙O2−to propagate the ˙OH chain reactions.

Role of a constructed wetland to humify effluent organic matter from a wastewater treatment plant

2013 ◽  
Vol 52 (31-33) ◽  
pp. 5840-5847 ◽  
Author(s):  
Dongjin Lee ◽  
Jaeweon Cho ◽  
Kangmin Chon ◽  
Byungjin Lim ◽  
Sudip Chakraborty ◽  
...  
Keyword(s):  
Organic Matter ◽  
Wastewater Treatment ◽  
Constructed Wetland ◽  
Wastewater Treatment Plant ◽  
Treatment Plant ◽  
Effluent Organic Matter

Role of polarity fractions of effluent organic matter in binding and toxicity of silver and copper

2016 ◽  
Vol 317 ◽  
pp. 344-351 ◽  
Author(s):  
Jisu Yoo ◽  
Taeyong Shim ◽  
Jin Hur ◽  
Jinho Jung
Keyword(s):  
Organic Matter ◽  
Effluent Organic Matter

Photodegradation of nitrite in lake waters: role of dissolved organic matter

2009 ◽  
Vol 6 (5) ◽  
pp. 407 ◽  
Author(s):  
Davide Vione ◽  
Marco Minella ◽  
Claudio Minero ◽  
Valter Maurino ◽  
Paolo Picco ◽  
...  
Keyword(s):  
Organic Matter ◽  
Dissolved Organic Matter ◽  
Hydroxyl Radical ◽  
Lake Water ◽  
Pure Water ◽  
Mixing Layer ◽  
Life Time ◽  
Model Calculations ◽  
Lake Waters

Environmental context. Nitrite is an important nutrient in surface waters, a key intermediate in the interconversion of nitrate into ammonium, and a considerable photochemical source of reactive species such as the hydroxyl radical. We have found that scavengers of hydroxyl radicals such as dissolved organic matter, which are usually supposed to inhibit the photodegradation of dissolved compounds, are able on the contrary to enhance the phototransformation of nitrite. The three weeks’ lifetime of nitrite in the surface layer of lakes, derived from the results of the present work, would make photochemistry an important issue in determining the concentration of nitrite in lake water. Abstract. Here we studied the degradation rate of nitrite (NO2–), added to lake water at sub-micromolar levels, upon ultraviolet (UV) irradiation. NO2– photodegradation was considerably faster in lake water compared with ultra-pure water. A key issue was the presence in lake water of hydroxyl radical (•OH) scavengers that inhibited the reaction between NO2– and •OH. Such a reaction, while causing additional NO2– transformation, produced nitrogen dioxide (NO2•) that was subsequently involved into the regeneration of NO2– by dimerisation or the reaction with nitric oxide (NO•). The scavenging of •OH by compounds different from NO2– (mainly dissolved organic matter, DOM) prevented the regeneration reactions from taking place, and enhanced the phototransformation of NO2–. Model calculations for the direct photolysis of NO2–, applied to the lake water samples, yielded a NO2– half-life time of around three weeks in the mixing layer of the lakes because of photodegradation. Therefore, we conclude that photodegradation is a potentially important process to control the concentration of NO2– in shallow lakes, or in deeper ones under stratification conditions.

Effect of Ozone Oxidation on the Molecular and Kinetic Properties of Effluent Organic Matter

2008 ◽  
Vol 11 (3) ◽  
Author(s):  
Fernando L. Rosario-Ortiz ◽  
Stephen P. Mezyk ◽  
Eric C. Wert ◽  
Devin F. R. Doud ◽  
Manu K. Singh ◽  
...  
Keyword(s):  
Organic Matter ◽  
Hydroxyl Radical ◽  
Rate Constant ◽  
Reaction Rate ◽  
Reaction Rate Constant ◽  
Order Reaction ◽  
Kinetic Properties ◽  
Second Order Reaction ◽  
Effluent Organic Matter ◽  
Ozone Oxidation

AbstractThe effect of ozone oxidation on the second order reaction rate constant between effluent organic matter (EfOM) and hydroxyl radical (

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