دورية أكاديمية
Degradation of methyl orange by pyrite activated persulfate oxidation: mechanism, pathway and influences of water substrates
| العنوان: | Degradation of methyl orange by pyrite activated persulfate oxidation: mechanism, pathway and influences of water substrates |
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| المؤلفون: | Hui Liu, Fenwu Liu, Jian Zhang, Jiaxing Zhou, Wenlong Bi, Junmei Qin, Qingjie Hou, Yue Ni, Shaozu Xu, Chen Yang |
| المصدر: | Water Science and Technology, Vol 85, Iss 10, Pp 2912-2927 (2022) |
| بيانات النشر: | IWA Publishing, 2022. |
| سنة النشر: | 2022 |
| المجموعة: | LCC:Environmental technology. Sanitary engineering |
| مصطلحات موضوعية: | advanced oxidation processes, methyl orange, persulfate, pyrite, Environmental technology. Sanitary engineering, TD1-1066 |
| الوصف: | Degradation mechanism of methyl orange (MO), a typical azo dye, with pyrite (FeS2) activated persulfate (PS) was explored. The results showed that when the initial concentration of MO was 0.1 mM, FeS2 was 1.6 g/L and PS was 1.0 mM, the removal rate of MO could reach 92.9% in 150 min, and the removal rate of total organic carbon could reach 14.1%. In addition, both pH ≤ 2 and pH ≥ 10 could have an inhibitory effect in the FeS2/PS system. Furthermore, Cl− and low concentrations of had little effect on the degradation of MO with FeS2/PS. However, and high concentrations of could inhibit the degradation of MO in the system. Besides, MO in river water and tap water were not degraded in FeS2/PS system, but acidification (pH = 4) would greatly promote the degradation. In addition, the removal rate of MO with FeS2/PS could still reach about 90% after five cycles of FeS2. Furthermore, the intermediates and possible degradation pathways were speculated by LC-MS, and the degradation mechanism of MO by FeS2/PS was that the cycle of Fe(III)/Fe(II) could continuously activate persulfate to produce . The results could provide technical support for azo dye degradation in the FeS2/PS system. HIGHLIGHTS FeS2/PS system could effectively remove methyl orange.; Acification (pH = 4) could promote the degradation of methyl orange in river water by a FeS2/PS system.; FeS2 could be recycled for activation of PS.; |
| نوع الوثيقة: | article |
| وصف الملف: | electronic resource |
| اللغة: | English |
| تدمد: | 0273-1223 1996-9732 |
| العلاقة: | http://wst.iwaponline.com/content/85/10/2912Test; https://doaj.org/toc/0273-1223Test; https://doaj.org/toc/1996-9732Test |
| DOI: | 10.2166/wst.2022.134 |
| الوصول الحر: | https://doaj.org/article/d85ae2fd447d4c1190daae46bbadacf6Test |
| رقم الانضمام: | edsdoj.85ae2fd447d4c1190daae46bbadacf6 |
| قاعدة البيانات: | Directory of Open Access Journals |
| تدمد: | 02731223 19969732 |
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| DOI: | 10.2166/wst.2022.134 |