Xie Quan

Dalian University of Technology, Lü-ta-shih, Liaoning, China

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Publications (303)795.41 Total impact

  • [Show abstract] [Hide abstract]
    ABSTRACT: In this study, an acidogenic reactor packed with a pair of Fe–carbon electrodes (R1) was developed to enhance anaerobic acidogenesis of organic wastewater at short hydraulic retention times. The results indicated that the acidogenic efficiency was improved by settling a bio-electrochemical system. When hydraulic retention times decreased from 12 to 3 h, R1 showed 18.9% more chemical oxygen demand removal and 13.8% more acidification efficiency. After cutting off the voltage of R1, the COD removal decreased by about 5%. Coupling of Fe2+ leaching and electric field accelerated the hydrolysis of polysaccharide, relieving its accumulation in the sludge phase. Several acidophilic methanogenic Archaea such as Methanosarcina sp. were enriched in R1, which was favorable for consuming organic acids and preventing excessive pH decline. Thus, the developed acidogenic reactor with Fe–carbon electrodes is expected to be potentially effective and useful for wastewater treatment.
    Bioresource Technology 03/2015; 179. · 5.04 Impact Factor
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    ABSTRACT: Sulfonamides, a class of the most commonly used antibiotics, are being increasingly released into the aquatic environment and have recently caused considerable concerns. However, knowledge on their fate and ecotoxicological effects upon aquatic organisms is not understood yet. This work investigated mainly the bioconcentration kinetics (uptake/depuration) of sulfadiazine (SDZ) and sulfamethoxazole (SMZ) in common carp (Cyprinus carpio) by exposure in different concentrations under semi-static conditions for 48d. The uptake rate (k1), growth-corrected depuration rate (k2g), and biological half-lives (t1/2) of two sulfonamides in liver and muscle were determined and they were 0.135-9.84Lkg(-1)d(-1), 0.0361-0.838d(-1), 8.3-19.2d, respectively. With exposure concentrations increasing, the uptake rates in liver and muscle decreased obviously but the depuration rates were not closely related with the exposure concentrations. SDZ exhibited higher uptake but lower excretion rates in almost all the liver and muscle than SMZ, resulting in both higher BCFs and half-lives for SDZ. The growth-corrected bioconcentration factors (BCFkg) were measured to be 1.65-165.73Lkg(-1)ww and their averages were in good consistency with the values predicted by previous models within one log unit. The work presented here was the first to model bioconcentration of SMZ and SDZ from water by laboratory-exposed fish. Copyright © 2014 Elsevier Ltd. All rights reserved.
    Chemosphere 02/2015; 120:592-7. · 3.14 Impact Factor
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    ABSTRACT: Microbial fuel cells (MFCs) using either Cr(VI) (MFCsCr) or Cu(II) (MFCsCu) as a final electron acceptor, are stacked to self-drive microbial electrolysis cells (MECs) using Cd(II) (MECsCd) as an electron acceptor for simultaneous reduction of Cr(VI) in MFCsCr, Cu(II) in MFCsCu and Cd(II) in MECsCd with no external energy consumption. Titanium sheet (TS) and carbon rod (CR) as the cathodes of MECsCd are assessed for efficient system performance. MFCsCr and MFCsCu in series is superior to the parallel configuration, and higher Cd(II) reduction along with simultaneous Cr(VI) and Cu(II) reduction supports TS function as a good cathode material. Conversely, CR can not entirely proceed Cd(II) reduction in MECsCd despite of more Cr(VI) and Cu(II) reduction in the same serial configuration than either system alone. While a decrease in cathode volume in both MFCsCr and MFCsCu with serial connection benefits to reduction of Cr(VI) in MFCsCr and Cu(II) in MFCsCu, Cd(II) reduction in MECsCd is substantially enhanced under a decrease in cathode volume in individual MFCsCr and serially connected with volume-unchanged MFCsCu. This study demonstrates simultaneous Cr(VI), Cu(II) and Cd(II) recovery from MFCsCr-MFCsCu-MECsCd self-driven system is feasible, and TS as the cathodes of MECsCd is critical for efficient system performance.
    Journal of Power Sources 01/2015; 273:1103–1113. · 5.26 Impact Factor
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    ABSTRACT: An electrochemiluminescence (ECL) immunosensor using Pt electrode modified with carbon quantum dot (CQDs) coated Au/SiO2 core-shell nanoparticles was proposed for sensitive detection of 8-hydroxy-2'-deoxyguanosine (8-OHdG) in this work. Rabbit anti-8-OHdG antibody was covalently bound to CQDs on the surface of Au/SiO2 core-shell nanoparticles. Through signal amplification of Au/SiO2 core-shell nanoparticles, 8-fold enhancement of the ECL signals was achieved. Under optimal conditions, a good linear range from 0.2 to 200ngmL(-1) with a low detection limit of 0.085ngmL(-1) (S/N=3) for 8-OHdG detection was obtained. Interfering substances tests showed that the corresponding ECL intensity (ΔECL) of 8-OHdG is 8-18 times higher than that of guanine, uric acid (UA) and ascorbic acid, demonstrating its good selectivity for 8-OHdG detection. The ECL immnuosensor exhibits long-term stability with a relative standard deviation (RSD) of 8.5% even after 16 cycles of continuous potential scans. The result of analytical detection of 8-OHdG in real samples was satisfactory. The proposed ECL immnuosensor shows good performance with high sensitivity, specificity, repeatability, stability and provided a powerful tool for 8-OHdG monitoring in clinical samples.
    Talanta 01/2015; 131C:379-385. · 3.50 Impact Factor
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    ABSTRACT: The present study aims to explore the effects of perfluorooctane sulfonate (PFOS) on cognitive function in developing rats and the underlying mechanism associated with synaptic plasticity. Pregnant Wistar rats were fed with 0, 5, and 15 mg/L of PFOS via drinking water during gestation and lactation. Offspring were exposed to PFOS on prenatal and/or postnatal days by crossfostering. Spatial learning and memory abilities were tested from postnatal day (PND) 35. We also analyzed the expression pattern of the synaptic plasticity-related genes and proteins in the hippocampus on PND7 and PND35. Results revealed that PFOS exposure reduced the spatial learning and memory abilities of the offspring, particularly of those with prenatal exposure. Meanwhile, protein levels of growth-associated protein-43, neural cell adhesion molecule 1, nerve growth factor, and brain-derived neurotrophic factor decreased on PND35, which are involved in the formation of synaptic plasticity. In contrast, significant increase in gap-43, ncam1, and bdnf genes on the mRNA level was observed on PND7, possibly due to the post-transcriptional mechanism. Results of both behavioral effects and molecular endpoints suggested the high risk of prenatal PFOS exposure. The decline of spatial learning and memory abilities induced by developmental PFOS exposure was closely related to synaptic plasticity. Copyright © 2014. Published by Elsevier Ltd.
    12/2014;
  • Materials Research Bulletin 11/2014; 59:111–116. · 1.97 Impact Factor
  • Materials Research Bulletin 11/2014; 59:179–184. · 1.97 Impact Factor
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    ABSTRACT: Accumulation of hydrogen during anaerobic processes usually results in low decomposition of volatile organic acids (VFAs). On the other hand, hydrogen is a good electron donor for dye reduction, which would help the acetogenic conversion in keeping low hydrogen concentration. The main objective of the study was to accelerate VFA composition through using azo dye as electron acceptor. The results indicated that the azo dye serving as an electron acceptor could avoid H2 accumulation and accelerate anaerobic digestion of VFAs. After adding the azo dye, propionate decreased from 2400.0 to 689.5 mg/L and acetate production increased from 180.0 to 519.5 mg/L. It meant that the conversion of propionate into acetate was enhanced. Fluorescence in situ hybridization analysis showed that the abundance of propionate-utilizing acetogens with the presence of azo dye was greater than that in a reference without azo dye. The experiments via using glucose as the substrate further demonstrated that the VFA decomposition and the chemical oxygen demand (COD) removal increased by 319.7 mg/L and 23.3% respectively after adding the azo dye. Therefore, adding moderate azo dye might be a way to recover anaerobic system from deterioration due to the accumulation of H2 or VFAs.
    Journal of Environmental Sciences 10/2014; · 1.77 Impact Factor
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    Chemical Engineering Journal 10/2014; 253:281–290. · 3.47 Impact Factor
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    ABSTRACT: The development of an efficient catalyst with excellent catalytic activity and high SO2 resistance at low temperatures (<300 °C) remains a challenge for the selective catalytic reduction (SCR) reaction. In this study, we report that MIL-100(Fe) is an alternative catalyst for the SCR of NOx with NH3, and it exhibits higher NOx conversion than the conventional V2O5-WO3/TiO2 catalyst below 300 °C. In addition, the effect of H2O and SO2 on the catalytic activity is reversible, and NOx conversions are recovered after ceasing the flow of SO2 and H2O. In situ diffuse reflectance infrared Fourier transform spectroscopy results indicate that both ionic NH4+ and coordinated NH3 existed on MIL-100(Fe) and that the reaction primarily followed the Langmuir-Hinshelwood mechanism, in which NH4+ reacts with NO2 formed from NO oxidation over iron sites. Furthermore, the redox properties of the iron species (Fe3++e-↔Fe2+) could play a significant role in activating the reactants.
    RSC Advances 09/2014; · 3.71 Impact Factor
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    ABSTRACT: Direct utilization of solar energy for photocatalytic removal of ammonia from water is a topic of strong interest. However, most of the photocatalysts with effective performance are solely metal-based semiconductors. Here, we report for the first time that a new type of atomic single layer graphitic-C3N4 (SL g-C3N4), a metal-free photocatalyst, has an excellent photocatalytic activity for total ammonia nitrogen (TAN) removal from water. The results demonstrated that over 80% of TAN (initial concentration 1.50 mg•L-1) could be removed in 6 h under Xe lamp irradiation (195 mW•cm-2). Furthermore, the SL g-C3N4 exhibited a higher photocatalytic activity in alkaline solution than that in neutral or acidic solutions. The investigation suggested that both photogenerated holes and hydroxyl radicals were involved the TAN photocatalytic oxidation process and that the major oxidation product was NO3--N. In addition, SL g-C3N4 exhibited good photocatalytic stability in aqueous solution. This work highlights the appealing application of an inexpensive metal-free photocatalyst in aqueous ammonia treatment.
    Environmental science & technology. 09/2014;
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    ABSTRACT: The effects of several aquatic environmental factors on the photochemical transformation of 2,2',4,4'-tetrabromodiphenyl ether (BDE-47) have been investigated. Ferric ion (Fe(III)) has been found to promote the phototransformation of BDE-47, and this process is further enhanced with the added chloride ion (Cl(-)), while it is suppressed with increasing pH. Electron spin resonance results show that the formation of hydroxyl radical, and the added Cl(-) could influence the generation of hydroxyl radical in Fe(III) solution. Hence, Cl(-) enhances the phototransformation of BDE-47 most probably because of the reaction with Fe(III) species under irradiation, yielding hydroxyl and chloride radicals. These radicals can not only decompose PBDEs, but also lead to their photodebromination and photochlorination. These results indicate that the aquatic environmental factors and Cl(-) in particular played an important role in the photochemical transformation process of PBDEs, providing insight into the likely fate of PBDEs in the marine environment.
    Marine Pollution Bulletin 08/2014; · 2.79 Impact Factor
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    ABSTRACT: It is important to develop efficient technologies on removal of perfluorooctanoic acid (PFOA) and perfluorooctane sulfonate (PFOS) from water due to their wide distribution and potential threat to human health. In this work, a durable and convenient electrosorption device was designed in continuous flow mode to investigate the adsorption of PFOX (X = A and S) on multiwalled carbon nanotubes (MWNTs) from water under electrochemical assistance. The electrosorption experiments were conducted under different influent and electrolyte concentrations, hydraulic retention time (HRT) and electrode distance to optimize the operation. The results showed that the highest removal efficiencies toward both PFOA and PFOS could come up to 90 % at 1 V. Compared with open circuit (OC) adsorption under the same conditions, the removal efficiencies were improved by 4.9 times (PFOA) and 4.2 times (PFOS) respectively. In addition, the MWNTs electrode was found to be reusable. These findings provide an efficient method to remove PFOX from water by electrosorption in continuous flow mode.
    Chinese Science Bulletin 08/2014; 59(23). · 1.37 Impact Factor
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    ABSTRACT: Molecularly imprinted polymer/mesoporous carbon composite nanoparticles (MCNs@MIP) were prepared through covalent grafting of the polymer onto the surface of mesoporous carbon nanoparticles by precipitation polymerization using ofloxacin as a template. The MCNs@MIP were well monodisperse, with a diameter of ~220 nm. Using the MCNs@MIP as electrode sensing material, the electrode showed good electrochemical activity and selective response to ofloxacin in aqueous solutions. There was a linear relationship between the peak currents in cyclic voltammetry measurement and ofloxacin concentrations in the range of 0.5–100 μM, with a limit of detection (S/N=3) of 80 nM.
    Materials Letters 08/2014; 129:95–97. · 2.27 Impact Factor
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    ABSTRACT: A rapid and highly sensitive sensor which can quantitatively detect indoor gaseous formaldehyde in 5 min based on Zeolitic Imidazolate Framework-8 (ZIF-8) is presented. ZIF-8 was synthesized by nontoxic zinc ions and 2-methylimidazole in aqueous solution at room temperature. The morphology, microstructure, stability and photoluminescence property of the material were characterized by scanning electron microscopy, nitrogen adsorption-desorption, X-ray diffraction, thermo gravimetric analysis and fluorometric analysis techniques, respectively. The results showed that the obtained material with a uniform particle size possessed of excellent thermal, structural stability and good luminescent property. Under the optimized condition, the photoluminescent intensity of the guest-free phase ZIF-8 was linear with the formaldehyde concentration in two intervals, 0-0.5 ppm and 0.5-20 ppm, with the correlative coefficients of 0.9991 and 0.9819, respectively. The limit of detection for gaseous formaldehyde was calculated to be 0.057 ppm (3δ/slope criterion). Moreover, other indoor pollutants emitted from indoor decorative materials, such as benzene, toluene, methanol and ethanol, showed little interference with the photoluminescence intensity of this platform during its determination process. The material exhibits great potential in the field of rapid, convenient and highly sensitive detection of indoor gaseous formaldehyde.
    RSC Advances 07/2014; · 3.71 Impact Factor
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    ABSTRACT: Enrichment of microbial functional consortium is critical to strengthen the performance of bio-electrochemical devices for treating industrial wastewaters. This study described a newly enrichment approach for electrochemically active iron reducing bacteria (IRB) through dosing Fe(III) into a MEC combined anaerobic reactor (R1) for dye wastewater treatment. After 51 days operation, reactor R1 presented the highest performance for the degradation of organic matter and dye as compared to the reference reactors without Fe(III). Subsequently, five isolates were obtained from the anodic biofilm of R1, in which a novel IRB related to Aeromonas hydrophila was selected as a model strain due to its highest Fe(III) reducing ability cyclic voltammetry and microbial fuel cell (MFC) technology showed that the model strain has the electrochemical activity and electricity generation capability. After inoculating this model strain, the decolorization of three dyes also reached over 90% at an initial concentration of 100 mg/L. This study might provide a novel method to enrich electrochemically active IRB in the bio-electrochemical reactor for treating industrial wastewater.
    Chemical Engineering Journal 07/2014; 248:223–229. · 3.47 Impact Factor
  • Applied Catalysis B Environmental 07/2014; s 154–155:206–212. · 5.83 Impact Factor
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    ABSTRACT: Manipulating carbon nanotubes (CNTs) through engineering into advanced membranes with superior performance for disinfection and decontamination of water is great promising but challenging. In this paper, a facile assembly of CNTs into novel hollow fiber membranes with tunable inner/outer diameters and structures is developed for the first time. These free-standing membranes composed entirely of CNTs feature a porosity of 86 ± 5% and a permeation flux of about 460 ± 50 L m-2 h-1 at a pressure differential of 0.04 MPa across the membrane. The randomly oriented interwoven structure of CNTs endows the membranes considerable resistance to pore blockage. Moreover, the adsorption capability of the CNT hollow fiber membranes, which is crucial in the efficient removal of small and trace contaminant molecules, is about 2 orders of magnitude higher than that of commercial polyvinylidene fluoride hollow fiber membranes. The unique advantage of the CNT hollow fiber membranes over other commercial membranes is that they can be in situ electrochemically regenerated after adsorption saturation.
    Environmental science & technology. 06/2014;
  • Applied Catalysis B Environmental 06/2014; s 152–153:46–50. · 5.83 Impact Factor
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    ABSTRACT: Dye wastewater exhibits significant ecotoxicity even though its physico-chemical parameters meet the discharge standards. In this work, the acute toxicity and genotoxicity of dye effluent were tested, and the Fenton-coagulation process was carried out to detoxify this dye effluent. The acute toxicity was evaluated according to the mortality rate of zebrafish, and genotoxicity was evaluated by micronucleus (MN) and comet assays. Removal of color and chemical oxygen demand (COD) was also investigated. The results indicated that the dye effluent showed strong acute toxicity and genotoxicity to zebrafish. After 4h of treatment by Fenton-coagulation process, the dye effluent exhibited no significant acute toxicity and genotoxicity to zebrafish. In addition, its COD was less than 50mg/L, which met the discharge standard. It demonstrates that Fenton-coagulation process can comprehensively reduce the acute toxicity and genotoxicity as well as the COD of the dye effluent.
    Journal of hazardous materials 04/2014; 274C:198-204. · 4.33 Impact Factor

Publication Stats

2k Citations
795.41 Total Impact Points

Institutions

  • 1998–2014
    • Dalian University of Technology
      • • Department of Environmental Science and Technology
      • • School of Environmental and Biological Science and Technology
      Lü-ta-shih, Liaoning, China
  • 2009
    • Nanjing University
      • School of Environment
      Nanjing, Jiangsu Sheng, China
    • Dalian Polytechnic University
      Lü-ta-shih, Liaoning, China
  • 2008
    • Xi'an University of Architecture and Technology
      Ch’ang-an, Shaanxi, China
    • Griffith University
      Southport, Queensland, Australia
  • 2004
    • Graz University of Technology
      • Institut für Analytische Chemie und Lebensmittelchemie
      Graz, Styria, Austria
  • 2003
    • Pohang University of Science and Technology
      • Department of Chemical Engineering
      Andong, North Gyeongsang, South Korea