Chelating agents enhanced CaO2 oxidation of bisphenol A catalyzed by Fe3+ and reuse of ferric sludge as a source of catalyst
Chelating agents enhanced CaO2 oxidation of bisphenol A catalyzed by Fe3+ and reuse of ferric sludge as a source of catalyst
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DOI：
10.1016/j.cej.2016.09.111
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发表时间：
2017-04
影响因子：
15.1
通讯作者：
Yanbo Zhou;Xingbin Fang;Tengfang Wang;Yong-hua Hu;Jun Lu
中科院分区：
文献类型：
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作者：
Yanbo Zhou;Xingbin Fang;Tengfang Wang;Yong-hua Hu;Jun Lu
研究了Fe 3+催化过氧化钙（CaO 2）氧化去除水中双酚A（BPA）的性能。考察了柠檬酸（CA）、草酸（OA）、乙二胺四乙酸（EDTA）和酒石酸（TA）等螯合剂对双酚A降解的促进作用和降低Fe ~（3+）投加量的作用。此外，铁污泥作为催化剂的来源，以减少固体废物的积累。结果表明，CaO 2和Fe 3+的投加量对BPA的降解影响逐渐增大，最佳投加量为2.0 mM CaO 2和3.0 mM Fe 3+。CA的加入有效地提高了CaO 2/Fe 3+体系中BPA的去除率，并将Fe 3+的利用率从3.0mM降低到0.25mM。BPA的降解率从21.3%（不加CA）分别提高到98.3%、98.9%、95.5%、95.0%。当铁泥浓度为2.4g/L时，OA对BPA的去除率可达95.1%。这项研究提出了一个高影响力的贡献，以芬顿为基础的废水处理，可以提高处理效率，减少污泥产量。
The performance of calcium peroxide (CaO2) oxidation catalyzed by Fe3+for the removal of bisphenol A (BPA) from aqueous solution was investigated. The ability of chelating agents (CAs), such as citric acid (CA), oxalic acid (OA), ethylenediaminetetraacetic (EDTA) and tartaric acid (TA), to accelerate the BPA degradation and to reduce the Fe3+dosage was assessed. Furthermore, ferric sludge was reused as a source of catalyst to reduce solid waste accumulation. Results showed that the dosage of CaO2and Fe3+progressively influenced the BPA degradation and the optimal dosage was 2.0 mM CaO2and 3.0 mM Fe3+. The addition of CAs effectively enhanced the BPA removal in CaO2/Fe3+system and remarkably reduced Fe3+utilization from 3.0 mM to 0.25 mM. BPA degradation increased from 21.3% (without CAs) to 98.3%, 98.9%, 95.5%, 95.0% with 1.0 mM CA, OA, EDTA and TA respectively. When 2.4 g/L ferric sludge was used as catalyst source, a 95.1% removal of BPA was achieved in the presence of OA. This study presents a high-impact contribution to Fenton-based wastewater treatment that can increase treatment efficiency and decrease waste sludge yield.