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Treatment of landfill leachate using magnetically attracted zero-valent iron powder electrode in an electric field
Sun,Dongni1,2; Hong,Xiaoting1; Cui,Zhonghua3; Du,Yingying1; Hui,K. S.4; Zhu,Enhao1; Wu,Keming2; Hui,K. N.5
2020-04-15
Source PublicationJournal of Hazardous Materials
ISSN0304-3894
Volume388
AbstractThis study combined electro-oxidation (EO) and electrocoagulation (EC) process (EO/EC) to treat landfill leachate by using RuO-IrO/Ti plate and microscale zero-valent iron powder composite anode. EO was achieved by direct oxidation and indirect oxidation on RuO-IrO/Ti plate, whereas EC was achieved using iron powder to lose electrons and produce coagulants in situ. The influences of variables including type of anode material, applied voltage, zero-valent iron dosage, interelectrode gap, and reaction temperature on EO/EC were evaluated. Results showed that at an applied voltage of 10 V, zero-valent iron dosage of 0.2 g, interelectrode gap of 1 cm, and non-temperature-controlled mode, the removal efficiencies were 72.5 % for total organic carbon (TOC), 98.5 % for ammonia, and 98.6 % for total phosphorus (TP). Some heavy metals and hardness were also removed. Further analysis indicated that the removal of TOC, ammonia, and TP followed pseudo-first order, pseudo-zero order, and pseudo-second order kinetic models, respectively. Other characteristics were examined by scanning electron microscopy–energy dispersive spectrometry, X-ray diffraction, and X-ray photoelectron spectroscopy. Overall, our results showed that EO/EC can be used to efficiently remove organic matter, ammonia, TP, and heavy metals from landfill leachate.
KeywordElectro-oxidation Electrocoagulation Landfill leachate Zero-valent iron
DOI10.1016/j.jhazmat.2019.121768
URLView the original
Language英语
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Cited Times [WOS]:3   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
CollectionUniversity of Macau
Corresponding AuthorHong,Xiaoting
Affiliation1.Department of Chemistry,Zhejiang Sci-tech University,Hangzhou,310018,China
2.State Environment Protection Key Laboratory of Mineral Metallurgical Resources Utilization and Pollution Control,Wuhan University of Science and Technology,Wuhan,430081,China
3.School of Environment and Natural Resources,Zhejiang University of Science and Technology,Hangzhou,310023,China
4.School of Engineering,Faculty of Science,University of East Anglia,Norwich,NR4 7TJ,United Kingdom
5.Institute of Applied Physics and Materials Engineering,University of Macau,Avenida da Universidade,Taipa,China
Recommended Citation
GB/T 7714
Sun,Dongni,Hong,Xiaoting,Cui,Zhonghua,et al. Treatment of landfill leachate using magnetically attracted zero-valent iron powder electrode in an electric field[J]. Journal of Hazardous Materials,2020,388.
APA Sun,Dongni,Hong,Xiaoting,Cui,Zhonghua,Du,Yingying,Hui,K. S.,Zhu,Enhao,Wu,Keming,&Hui,K. N..(2020).Treatment of landfill leachate using magnetically attracted zero-valent iron powder electrode in an electric field.Journal of Hazardous Materials,388.
MLA Sun,Dongni,et al."Treatment of landfill leachate using magnetically attracted zero-valent iron powder electrode in an electric field".Journal of Hazardous Materials 388(2020).
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