文献类型：期刊文献

英文题名：Treatment of triethyl phosphate wastewater by Fenton oxidation and aerobic biodegradation

作者：Yang, Linyan[1,2,3];Sheng, Mei[1];Zhao, Huihui[1];Qian, Mengcheng[1];Chen, Xingkui[1];Zhuo, Yakun[1];Cao, Guomin[1,2,3]

机构：[1]East China Univ Sci & Technol, Sch Resources & Environm Engn, Shanghai 200237, Peoples R China;[2]Shanghai Inst Pollut Control & Ecol Secur, Shanghai 200092, Peoples R China;[3]East China Univ Sci & Technol, Natl Engn Lab Ind Wastewater Treatment, Shanghai 200237, Peoples R China

年份：2019

卷号：678

起止页码：821

外文期刊名：SCIENCE OF THE TOTAL ENVIRONMENT

收录：;EI(收录号：20191906908806);WOS:【SCI-EXPANDED(收录号:WOS:000468618900081)】；

语种：英文

外文关键词：Phosphorus removal; Triethyl phosphate; Fenton oxidation; Biodegradation; Salinity

摘要：The conventional (i.e., aerobic biodegradation) and advanced (i.e., Fenton oxidation) treatment methods with implementation potentials were in parallel investigated for the treatment of industrial wastewater rich in organic phosphorus (Org.-P, dominated by triethyl phosphate (TEP)). Fenton effectively reduced Org.-P from 58 to 5 mg/L under the optimal reaction conditions of 20 mM H2O2, 14 mM Fe2+, pH 3.0, 120 mins' reaction time and the continuous dosing method (N = 4), following the first order kinetic model with a reaction rate constant of 0.07 min(-1). Nevertheless, the pretreatment prior to Fenton reaction (e.g., desalination) is recommended since high salinity significantly hindered TEP degradation, possibly due to the formation of Fe-Cl complexation and its scavenging effect to center dot OH. The Org.-P mineralization rate of similar to 98% was achieved by aerobic biodegradation. The excellent performance was maintained up to a salinity of 4.6% (w/w), higher than which the mineralization was seriously deteriorated. The high salinity could inhibit the microbial growth. This property might be responsible for the insufficient Org.-P removal during the on-site wastewater biological treatment. The Org.-P and COD concentrations were 6 and 405 mg/L respectively after the realistic wastewater treatment by biodegradation and coagulation, which meets with the municipal sewer discharge standard (GB/T 31962-2015). (C) 2019 Elsevier B.V. All rights reserved.