Degradation of bisphenol A by activating peroxymonosulfate with Mn0.6Zn0.4Fe2O4 fabricated from spent Zn-Mn alkaline batteries
Degradation of bisphenol A by activating peroxymonosulfate with Mn0.6Zn0.4Fe2O4 fabricated from spent Zn-Mn alkaline batteries
复制标题
废锌锰碱性电池Mn0.6Zn0.4Fe2O4活化过一硫酸盐降解双酚A
DOI：
10.1016/j.cej.2019.01.189
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发表时间：
2019-05-15
影响因子：
15.1
通讯作者：
Zhang, Hui
中科院分区：
文献类型：
--
作者：
Lin, Heng;Li, Simiao;Zhang, Hui
尖晶石型铁氧体在活化过氧化物用于环境修复方面显示出巨大的潜力。以废旧锌锰碱性电池为原料，采用柠檬酸盐燃烧法制备了锰锌铁氧体催化剂。将合成的Mn 0. 6 Zn 0. 4Fe 2 O 4催化剂用于过氧化单硫酸盐（PMS）的活化和双酚A（BPA）的降解。在初始pH为6.2，Mn0.6Zn0.4Fe2O4投加量为0.2 g/L，PMS浓度为0.5 mM，反应时间为60 min时，BPA（0.1 mM）去除率达到95.8%。金属浸出浓度和自由基鉴定实验表明，BPA主要通过表面吸附的活性自由基降解。尖晶石A位的金属（AFe（2）O（4），A = Mn和Zn）是PMS活化的主要原因，而Fe（III）则是表面羟基的储存库，大大加速了BPA的降解。Cl-的加入改善了BPA的破坏，NaHCO 3浓度低于5 mM对BPA去除的影响可以忽略不计。PMS/Mn0.6Zn0.4Fe2O4工艺处理添加BPA的真实的河水时，BPA的去除速度远快于去离子水。这意味着PMS/Mn0.6Zn0.4Fe2O4工艺不仅可以为废旧电池的回收利用提供一些新的见解，而且还可以从废水中去除污染物。
Spinel ferrites have shown great potential to activate peroxides for environmental remediation. In this work, a Mn-Zn ferrite catalyst was fabricated by the citrate combustion method from spent Zn-Mn alkaline batteries. The synthesized Mn0.6Zn0.4Fe2O4 catalysts were applied to activate peroxomonosulfate (PMS) and degrade bisphenol A (BPA) in water. A 95.8% BPA (0.1 mM) removal was achieved at initial pH of 6.2, Mn0.6Zn0.4Fe2O4 dosage of 0.2 g/L, PMS concentration of 0.5 mM, and reaction time of 60 min. The concentration of metal leaching and radical identification experiments suggested that BPA is mainly degraded by surface-adsorbed reactive radicals. Metals at A site of the spinel (AFe(2)O(4), A = Mn and Zn) were responsible for PMS activation and Fe(III) acted as the reservoir for the surface hydroxyl groups, which substantially accelerated the degradation of BPA. The addition of Cl- improved the destruction of BPA and a NaHCO3 concentration below 5 mM had a negligible effect on the BPA removal. When the PMS/Mn0.6Zn0.4Fe2O4 process was used to treat real river water spiked with BPA, the removal of BPA was much faster than that in deionized water. This implied that the PMS/Mn0.6Zn0.4Fe2O4 process may provide some new insights not only for the recycling of spent batteries, but also for removal of contaminants from wastewater.