期刊
SCIENCE OF THE TOTAL ENVIRONMENT
卷 659, 期 -, 页码 963-972出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.scitotenv.2018.12.334
关键词
Integrated electrokinetic process; Fe3O4/S2O82 oxidation process; Fenton-like process; Schwertmannite; Enhanced in situ bioremediation; Second-generation oxygen release compound
资金
- Environmental Protection Administration, Taiwan
- Ministry of Science and Technology, Taiwan
- MOST [105-2221-E-110-005]
Concerning the contamination of phthalate esters (PAEs) in river sediments, this mini-review introduces four recently reported novel integrated electrokinetic (EK) processes for the remediation purpose, namely two combined technologies of the EK process and advanced oxidation process (EK-AOP Processes) and two combined technologies of the EK process and biological process (EK-BIO Processes). The following is a comprehensive summary for these remediation processes: (1) the EK process coupled with nano-Fe3O4/S2O82-oxidation process Test results have shown that nanoscale Fe3O4 played a significant role in activating persulfate oxidation. Even a recalcitrant compound like di(2-ethylhexyl)phthalate (DEHP), its concentration in test sediment was reduced to 1.97 mg kg(-1), far below the regulatory levels set by Taiwan EPA; (2) the EK process integrated with a novel Fenton-like process catalyzed by nanoscale schwertmannite (nano-SHM) - Test results have revealed that simultaneous injection of nano-SHM slurry and H2O2 into the anode reservoir and sediment compartment is a good practice. 70-99% in removal efficiency was obtained for various target PAEs; (3) enhanced in situ bioremediation coupled with the EK process for promoting the growth of intrinsic microorganisms by adding H2O2 as an oxygen release compound (ORC) - Test results have demonstrated that an intermittent mode of injecting lab-prepared ORC directly into the contaminant zone would be beneficial to the growth of intrinsic microorganisms in test sediment for in situ bioremediation of target PAEs; and (4) coupling of a second-generation ORC (designated 2G-ORC) with the EK-biological process - Test results have proved that 2G-ORC is long-lasting and can be directly utilized as the carbon source and oxygen source for microbial growth resulting in an enhanced biodegradation of PAEs. Except DEHP having a residual concentration of 4 mu g kg(-1), all other target PAEs in test sediment were totally removed by this novel combined remediation process. (c) 2019 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据