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Nan Chen
China University of Geosciences
AdsorptionInorganic chemistryChemistryNitrateDenitrification
103Publications
19H-index
1,260Citations
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Publications 116
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Abstract In recent years, with the rapid development of economy and industry, the increasing pollution of pentavalent vanadium (V(V)) in water has led to potential dangers to human health, which cannot be ignored. In this study, nano zero-valent iron (nZVI) was successfully stabilized by biochar (BC) to remediate vanadium(V(V)) contaminated wastewater. The removal process of V(V) from water by the synthesized nZVI/BC under different conditions was systematically discussed. The results showed tha...
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#1Haishuang WangH-Index: 2
#2Nan ChenH-Index: 19
Last. Yu GaoH-Index: 2
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Abstract Nitrate pollution presents a serious threat to the environment and public health. As an excellent heterotrophic denitrification carbon source, banana peel (a kind of agricultural waste) provides a feasible alternative to deal with the persistent high concentrations of nitrate pollution. Although the feasibility and economy of banana peel for denitrification have already been reported, the long-term stability and mechanism were still unclear. The coupling mechanism of organic matters and...
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#1Yang DengH-Index: 2
Last. Yu Gao (SDUST: Shandong University of Science and Technology)H-Index: 2
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Abstract Humic-like substance-containing wastewater is the main type of wastewater. This study investigated the redox behavior of organic matter during the treatment process of humic-like substances by electrochemical oxidation as well as the feasibility of improving heavily polluted soil (using petroleum hydrocarbon contaminated soil as an example) with the effluent from different treatment levels. Molecular spectrum analysis and electrochemical analysis showed that the quinone and aromatic gro...
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#1Tong Liu (China University of Geosciences)H-Index: 1
#2Nan Chen (China University of Geosciences)H-Index: 19
Last. Chuanping Feng (China University of Geosciences)H-Index: 33
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Pyrite (FeS2) catalyzed conversion of H2O2 into oxidants is increasingly recognized as a promising Fenton-like process for treating recalcitrant contaminants. However, the underlying mechanism remains unclear, especially for nano-pyrite. The present study explored the potential of a nano-pyrite Fenton system for p-nitrophenol oxidation using high energy ball milled nano-pyrite. The enhancement in ˙OH production, with 3 times faster p-nitrophenol degradation than the conventional Fenton system, i...
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#1Yang Deng (China University of Geosciences)H-Index: 2
#2Nan Chen (China University of Geosciences)H-Index: 19
Last. Ziqi Chen (China University of Geosciences)
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Abstract Low current efficiency and the formation of organochlorine by-products were the critical bottlenecks in the practical applicability of electrochemical oxidation technology for nitrogen-containing organic wastewater (NCOW) treatment. In this study, a filled-bed electrochemical system with waste iron filings (IFES) was constructed to enhance the removal efficiency of total nitrogen (TN) and chemical oxygen demand (COD) as well as inhibition of the accumulation of the organochlorine by-pro...
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#1Ying Liu (PKU: Peking University)
#2Yizhi Sheng (Miami University)
Last. Tong Liu (China University of Geosciences)H-Index: 1
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Abstract Denitrifying microbial community can be utilized for eliminating nitrate and Fe(II) combined contamination in groundwater, while excessive amount of Fe(II) limit the process. Natural mineral can be additional substrate for the microbial growth, whereas how it influences the microbial community that mediating the denitrification coupling with Fe(II) oxidation and balancing inhibition of excessive Fe(II) on denitrification remain unclear. In the present study, we conducted a series of mic...
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#2Chuanping FengH-Index: 33
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A novel palm fiber biofilm electrode reactor (PBER) was developed, and its denitrification mechanism was analyzed by investigating denitrification performance, extracellular polymeric substances (EPS) and microbial community. The results showed that palm fiber was a stable and efficient electrode embedding material. Almost 100% nitrate removal efficiency was achieved at 250 mA/m2 with rarely accumulation of nitrite and ammonium. Moreover, a lower energy consumption of 3.84×10-3 kWh/g NO- 3-N was...
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#1Wang Lu (China University of Geosciences)
#2Nan Chen (China University of Geosciences)H-Index: 19
Last. Fangxin Chen (China University of Geosciences)H-Index: 2
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Abstract River sediment is the main internal pollution source of water body. This study evaluated the feasibility of electrochemical oxidation (EO) for polluted river sediment treatment. The hydrophilic and acute cytotoxicity (ACT) of dissolved organic matter (DOM) during electrolysis were mainly investigated. Meanwhile, the behavior of sediment evolution was also characterized. The results showed that the EO process was feasible for the treatment of polluted river sediment. The COD removal effi...
1 CitationsSource
#1Yutian Hu (China University of Geosciences)H-Index: 1
#2Nan Chen (China University of Geosciences)H-Index: 19
Last. Miao Li (THU: Tsinghua University)H-Index: 21
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Abstract To date, comparatively little research is known about the role of pH conditions in bioremediation of Cr(VI) contaminated aquifers. This study explored microbial Cr(VI) reduction and denitrification under different initial pHs. The underlying mechanism was also investigated. When testing 50 mg/L–N nitrate and 10 mg/L Cr(VI), complete contaminants removal was observed at initial pH 10.0 and 11.0, and only 10 %–30 % of removal achieved under other conditions, which might be ascribe to the s...
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#1Tong Liu (China University of Geosciences)H-Index: 1
Last. Chungang FengH-Index: 11
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In modern Earth, anaerobic pyrite oxidation under circumneutral conditions also has great impact on the fate of nitrate in aquifers and sediments, as well as the transportation of toxic metals. However, the mechanism of how microbes mediated this process is still being debated. Electrochemical analysis on pyrite cubic electrode showed that, its oxidation threshold under anaerobic circumneutral conditions (ca. 200 mV) was much lower than that at aerobic acidic conditions (ca. 650 mV), implying po...
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