- Title
- On peroxymonosulfate-based treatment of saline wastewater: when phosphate and chloride co-exist
- Creator
- Sheng, Bo; Huang, Ying; Wang, Zhaohui; Yang, Fei; Ai, Luoyan; Liu, Jianshe
- Relation
- RSC Advances Vol. 8, Issue 25, p. 13865-13870
- Publisher Link
- http://dx.doi.org/10.1039/c8ra00600h
- Publisher
- Royal Society of Chemistry
- Resource Type
- journal article
- Date
- 2018
- Description
- Both chloride and phosphate are common inorganic anions in industrial wastewater, however, their effects on peroxymonosulfate (PMS)-based oxidation systems are largely unknown. The present results show that addition of chloride ( > 1 mM) apparently enhanced the degradation of Acid Orange 7 (AO7) independent of the presence of phosphate (PBS) buffer. Both PBS and chloride favored the degradation of AO7, while PBS played a more important role when they co-existed. The degradation efficiency of AO7 was enhanced by increasing the concentration of PBS and chloride. A maximum of absorbable organic halides (AOX) accumulation was observed; indicating some chlorinated byproducts could be initially generated and further oxidized by increasing the reaction time. It is demonstrated that the PBS/PMS system, with a lower AOX formation at the same chloride concentration, is superior to the Co/PMS system, a typical sulfate radical-based system. The active chlorine species (HClO/Cl₂) were found to be the dominant oxidants in the presence of higher chloride concentration ( > 50 mM) under neutral conditions. The findings of this work may promote the further application of PMS-based oxidation processes in saline effluents treatment.
- Subject
- industrial wastewater; PBS; A07 degradation; pollutants
- Identifier
- http://hdl.handle.net/1959.13/1403667
- Identifier
- uon:35201
- Identifier
- ISSN:2046-2069
- Rights
- This article is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported Licence.
- Language
- eng
- Full Text
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