- Title
- On the kinetics of organic pollutant degradation with Co²⁺/peroxymonosulfate process: when ammonium meets chloride
- Creator
- Huang, Ying; Yang, Fei; Ai, Luoyan; Feng, Min; Wang, Chi; Wang, Zhaohui; Liu, Jianshe
- Relation
- Chemosphere Vol. 179, Issue July, p. 331-336
- Publisher Link
- http://dx.doi.org/10.1016/j.chemosphere.2017.03.110
- Publisher
- Elsevier
- Resource Type
- journal article
- Date
- 2017
- Description
- A large amount of chloride and ammonium ions were produced and released from industrial processes with non-biodegradable organic pollutants to affect efficiencies of advanced oxidation processes (AOPs). Here, the influences of chloride and ammonium ions on Co/peroxymonosulfate (Co/PMS) reaction system, a widely used AOPs to produce sulfate radicals, were investigated by examining the degradation efficiency of an azo dye (Acid Orange 7, AO7). The experimental results showed that a significant decrease in the degradation rate of AO7 was observed in the presence of NH₄⁺, while a dual effect of chloride on AO7 bleaching appeared. The presence of NH₄Cl was unfavorable for AO7 degradation at low concentration (<20 mM), whereas further addition of NH₄Cl (>20 mM) apparently accelerated AO7 discoloration rate. The apparent effects of the two co-existing inorganic ions were determined by roles of the dominating ions at varied molar ratio of [NH₄⁺]/[Cl⁻]. The present study may have technical implications for the treatment of industrial wastewater containing diverse ions in practice.
- Subject
- chloride ion; ammonium ion; Co/PMS system; wastewater treatment
- Identifier
- http://hdl.handle.net/1959.13/1400933
- Identifier
- uon:34837
- Identifier
- ISSN:0045-6535
- Language
- eng
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