Application for oxytetracycline wastewater pretreatment by Fenton iron mud based cathodic-anodic-electrolysis ceramic granular fillers

• Published in: Chemosphere (Oxford) Vol. 182; pp. 483 - 490
• Main Authors: Zhang, Feilong, Yue, Qinyan, Gao, Yuan, Gao, Baoyu, Xu, Xing, Ren, Zhongfei, Jin, Yang
• Format: Journal Article
• Language: English
• Published: England Elsevier Ltd 01.09.2017
• Subjects: Ceramic granular fillers; Ceramics - chemistry; Continuous reactor; Electrodes; Electrolysis; Fenton iron mud; Filtration; Hydrogen Peroxide - chemistry; Iron - chemistry; Oxytetracycline; Oxytetracycline - analysis; Waste Water - chemistry; Water Pollutants, Chemical - analysis; Water Purification - methods; Oxytetracycline; Ceramic granular fillers; Fenton iron mud; Continuous reactor
• ISSN: 0045-6535; 1879-1298
• DOI: 10.1016/j.chemosphere.2017.05.058

In this study, Fenton iron mud applied as main raw material of cathodic-anodic-electrolysis ceramic granular fillers (ICMF) in a continuous reactor, which were used to pretreat oxytetracycline (OTC) wastewater. The ICMF was characterized by Scanning Electron Microscope and Energy Dispersive Spectrometer analysis. The effects of pH value, hydraulic retention time, OTC concentrations and aeration on removal efficiency of total organic carbon (TOC) and OTC were studied. The degradation byproducts of OTC were analyzed by UV-2450, High Performance Liquid Chromatography and Liquid Chromatography-mass Spectrometry. The SEM images showed that the surface ICMF was porous. This system had a higher stability, and good removal efficiency of TOC of 80.5% and OTC of 98.5% under the optimal conditions, which were influent pH of 3, HRT of 4 h, and anaerobic condition. After running for 60 d, the removal efficiency of TOC was stable and the ICMF did not become hardened. The reactor was back washed by acid solution (pH: 1) in 20 d approximately. This paper provides useful information for approaching in wastewater pretreatment and recycling the Fenton iron mud. [Display omitted] •Fenton iron mud was first applied as main raw material of ICMF.•80.5% of TOC and 98.5% of OTC was removed by the ICMF system.•The removal mechanism include redox reaction, flocculation and electrophoresis.•The Fenton iron mud can be recycled, which may reduce the cost of materials.