Yaobin Zhang

Dalian University of Technology, Dalian, Liaoning, China

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Publications (72)207.04 Total impact

  • [show abstract] [hide abstract]
    ABSTRACT: Pharmaceutical antibiotics are not easily removed from water by conventional water-treatment technologies and have been recognized as new emerging pollutants. Herein, we report the synthesis of clickable azido periodic mesoporous organosilicas (PMOs) and their use as adsorbents for the adsorption of antibiotics. Ethane-bridged PMOs, functionalized with azido groups at different densities, were synthesized by the co-condensation of 1,2-bis(trimethoxysilyl)ethane (BTME) and 3-azidopropyltrimethoxysilane (AzPTMS), in the presence of nonionic-surfactant triblock-copolymer P123, in an acidic medium. Four different alkynes were conjugated to azide-terminated PMOs by means of an efficient click reaction. The clicked PMOs showed improved adsorption capacity (241 μg g(-1) ) for antibiotics (ciprofloxacin hydrochloride) compared with azido-functionalized PMOs because of the enhanced π-π stacking interactions. These results indicate that click reactions can introduce multifunctional groups onto PMOs, thus demonstrating the great potential of PMOs for environmental applications.
    Chemistry 02/2014; 20(7):1957-63. · 5.93 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. 01/2014; 248:223–229.
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    ABSTRACT: Anaerobic digestion of waste activated sludge usually requires pretreatment procedure to improve the bioavailability of sludge, which involves considerable energy and high expenditures. This study proposes a cost-effective method for enhanced anaerobic digestion of sludge without a pretreatment by directly adding iron into the digester. The results showed that addition of Fe(0) powder could enhance 14.46% methane yield, and Fe scrap (clean scrap) could further enhance methane yield (improving rate 21.28%) because the scrap has better mass transfer efficiency with sludge and liquid than Fe(0) powder. The scrap of Fe with rust (rusty scrap) could induce microbial Fe(III) reduction, which resulted in achieving the highest methane yield (improving rate 29.51%), and the reduction rate of volatile suspended solids (VSS) was also highest (48.27%) among Fe powder, clean scrap and rusty scrap. PCR-DGGE proved that the addition of rusty scrap could enhance diversity of acetobacteria and enrich iron-reducing bacteria to enhance degradation of complex substrates.
    Bioresource Technology 01/2014; 159:297–304. · 4.75 Impact Factor
  • Applied Catalysis B: Environmental. 01/2014; s 152–153:46–50.
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    ABSTRACT: Due to their build-in electric fields locating at interfaces of different materials, heterojunctions have shown excellent carrier separation ability and received wide attention in photocatalysis and photovoltaics. In general, larger interface area and smoother carrier transfer pathway are favorable for heterojunctions to achieve larger active area of build-in electric fields and longer photogenerated charge lifetime, respectively, and sequentially the heterojunctions may show optimized separation ability. However, there is hardly any report about this topic. In this paper, we design a new heterojunction material where a graphene (Gr) layer is close-fitting as the surface of the ZnIn2S4 microspheres (ZnIn2S4@Gr) in virtue of the electrostatic interaction between the functional groups of GO and the amino groups of ZnIn2S4 microspheres. Benefiting from the effective contact of Gr and ZnIn2S4 at their interface as well as the superior charge transfer ability of Gr, this structure displays good photocatalytic capability. The kinetic constant of phenol degradation on ZnIn2S4@Gr was 3.03 h(-1), which was 8.4-fold and 1.5-fold higher than those on ZnIn2S4 and ZnIn2S4-Gr composites, respectively. Furthermore, the excellent performance was stable according to the result of the consecutive cycling experiment. These experimental results demonstrated that the large interface area and smooth carrier transfer pathway were significant for heterojunction materials to provide better photogenerated charge separation properties.
    Dalton Transactions 12/2013; · 3.81 Impact Factor
  • Jian Ding, Yaobin Zhang, Xie Quan, Shuo Chen
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    ABSTRACT: Background Anaerobic technology is one of the most highly efficient methods for the biological treatment of dye wastewater by means of the reductive cleavage of the azo linkages. Dissimilatory Fe(III)-reducing microorganisms, as a kind of representative strains, play crucial roles in miscellaneous processes of environmental concern. The main objective of the study was to investigate the novel Fe(III)-reducing strain isolated from a BES enhanced by addition of Fe(OH)3. ResultsIn this study, a new electrogen, Sphingomonas strain DJ, was isolated from a microbial electrochemical reactor with Fe(OH)3 added. The iron-reduction and the dye decolorization efficiencies of this strain achieved 69.04% and 97.65%, respectively. Cyclic voltammetry showed that strain DJ had the electrochemically activity. The dye concentration, operating temperature and pH had obvious effects on the performance of the strain. Addition of Fe(III) into the medium further enhanced the decolorization efficiency. The possible pathway of the reduction of AO7 with the new strain was proposed. Conclusion The model developed for this study might provide a new method for enriching electroactively Fe(III)-reducing bacteria to treat other refractory wastewaters.
    Journal of Chemical Technology & Biotechnology 12/2013; · 2.50 Impact Factor
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    ABSTRACT: Pharmaceutical antibiotics, as emerging contaminants, are usually composed of several functional groups that endow them with the ability to interact with adsorbents through different interactions. This makes the preparation of adsorbents tedious and time-consuming to screen appropriate functionalized materials. Herein, we describe the synthesis of clickable SBA-15 and demonstrate its feasibility as a screening material for the adsorption of antibiotics based on similar adsorption trends on materials with similar functional groups obtained by a click reaction and cocondensation/grafting methods.
    Chemistry - An Asian Journal 11/2013; · 4.57 Impact Factor
  • Yinghong Feng, Yaobin Zhang, Xie Quan, Suo Chen
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    ABSTRACT: Anaerobic digestion is promising technology to recover energy from waste activated sludge. However, the sludge digestion is limited by its low efficiency of hydrolysis-acidification. Zero valent iron (ZVI) as a reducing material is expected to enhance anaerobic process including the hydrolysis-acidification process. Considering that, ZVI was added into an anaerobic sludge digestion system to accelerate the sludge digestion in this study. The results indicated that ZVI effectively enhanced the decomposition of protein and cellulose, the two main components of the sludge. Compared to the control test without ZVI, the degradation of protein increased 21.9% and the volatile fatty acids production increased 37.3% with adding ZVI. More acetate and less propionate are found during the hydrolysis-acidification with ZVI. The activities of several key enzymes in the hydrolysis and acidification increased 0.6-1 time. ZVI made the methane production raise 43.5% and sludge reduction ratio increase 12.2 percent points. Fluorescence in situ hybridization analysis showed that the abundances of hydrogen-consuming microorganisms including homoacetogens and hydrogenotrophic methanogens with ZVI were higher than the control, which reduced the H2 accumulation to create a beneficial condition for the sludge digestion in thermodynamics.
    Water Research 11/2013; · 4.66 Impact Factor
  • Jingxin Zhang, Yaobin Zhang, Xie Quan, Shuo Chen
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    ABSTRACT: Adding Fe(III) into a MEC - anaerobic reactor enhanced the degradation of organic matters. To clarify the respective effects of combining Fe(III) dosage and a MEC and Fe(III) dosage only on strengthening anaerobic digestion, three anaerobic reactors were operated in parallel: a MEC - anaerobic reactor with dosing Fe(OH)3 (R1), an anaerobic reactor with dosing Fe(OH)3 (R2) and a common anaerobic reactor (R3). With increasing influent COD from 1500 to 4000 mg/L, the COD removal in R1 was maintained at 88.3% under a voltage of 0.8 V, which was higher than that in reactor R2 and R3. When the power was cut off, the COD removal in R1 decreased by 5.9%. The addition of Fe(OH)3 enhanced both anaerobic digestion and anodic oxidation, resulting in the effective mineralization of volatile fatty acids (VFAs). The reduced Fe(II) combined with electric field resulted more extracellular polymeric substances (EPS) production. Quantitative real - time PCR showed a higher abundance of bacteria in the anodic biofilm and R1. Pyrosequencing and denaturing gradient gel electrophoresis (DGGE) analysis revealed that the dominant bacteria and archaea communities were richer and more abundant in the anode biofilm and R1.
    Water Research 07/2013; · 4.66 Impact Factor
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    ABSTRACT: Silanol groups on a silica surface affect the activity of immobilized catalysts because they can influence the hydrophilicity/hydrophobicity, matter transfer, or even transition state in a catalytic reaction. Previously, these silanol groups have usually been passivated by using surface-passivation reagents, such as alkoxysilanes, bis-silylamine reagents, chlorosilanes, etc., and surface passivation has typically been found in mesoporous-silicas-supported molecular catalysts and heteroatomic catalysts. However, this property has rarely been reported in mesoporous-silicas-supported metal-nanoparticle catalysts. Herein, we prepared an almost-superhydrophobic SBA-15-supported gold-nanoparticle catalyst by using surface passivation, in which the catalytic activity increased more than 14 times for the reduction of nitrobenzene compared with non-passivated SBA-15. In addition, this catalyst can selectively catalyze hydrophobic molecules under our experimental conditions, owing to its high (almost superhydrophobic) hydrophobic properties.
    Chemistry - An Asian Journal 05/2013; 8(5):934-8. · 4.57 Impact Factor
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    ABSTRACT: In this study, a novel approach was developed for sulfate - containing wastewater treatment via dosing FeO in a two - stage anaerobic reactor (A1, S1). The addition of FeO in its second stage i.e. acidogenic sulfate-reducing reactor (S1) resulted in microbial reduction of Fe (III), which significantly enhanced the biological sulfate reduction. In reactor S1, increasing influent sulfate concentration to 1400 mg/L resulted in a higher COD removal (27.3%) and sulfate reduction (57.9%). In the reference reactor without using FeO (S2), the COD and sulfate removal were 15.6% and 29%, respectively. The combined performance of the two-stage anaerobic reactor (A1, S1) also showed a higher COD removal of 74.2%. Denaturing gradient gel electrophoresis (DGGE) and phylogenetic analysis showed that the dominant bacteria with high similarity to IRB species as well as sulfate reducer Desulfovibrio and acidogenic bacteria (AB) were enriched in S1. Quantitative Polymerase Chain Reaction (qPCR) analysis presented a higher proportion of sulfate reducer Desulfovibrio marrakechensis and Fe (III) reducer Iron-reducing bacteria HN54 in S1.
    Water Research 04/2013; 47(6):2033-40. · 4.66 Impact Factor
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    ABSTRACT: Microbial electrolysis cell (MEC) devices are efficient for wastewater treatment, but its application was limited due to low anode oxidation rate. The objective of this study was to improve anode performance of a MEC combined anaerobic reactor (R1) for high concentration industrial wastewater treatment via dosing Fe(OH)3. For the first 53days without power, the addition of Fe(OH)3 in R1 enhanced the degradation of reactive brilliant red X-3B dye and sucrose. Applying a voltage of 0.8V in R1 resulted in a higher decolorization and COD removal through driving the redox reactions at electrodes under Fe(III)-reducing conditions. Real-time PCR and enzyme activity analysis showed that the abundance and azoreductase activity of bacteria were improved in R1. Pyrosequencing revealed that dominant populations in anode biofilm and R1 were more diverse and abundant than the common anaerobic reactor (R2), and there was a significant distinction among anode film, R1 and R2 in microbial community structure.
    Bioresource Technology 03/2013; 136C:273-280. · 4.75 Impact Factor
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    ABSTRACT: The anoxic-oxic (A/O) process has been extensively applied for simultaneous removal of organic contaminants and nitrogen in wastewater treatment. However, very little is known about its ability to remove toxic materials. Municipal wastewater contains various kinds of pollutants, some of which have recalcitrant genotoxicity and may cause potential threat to environment, and even can lead to extinction of many species. In this study, we have selected three municipal wastewater treatment plants (WWTPs) employing anoxic-oxic (A/O) process to evaluate their ability to remove acute toxicity and genotoxicity of wastewater. Mortality rate of zebrafish (Danio rerio) was used to evaluate acute toxicity, while micronucleus (MN) and comet assays were used to detect genotoxicity. Results showed that in this process the acute toxicity was completely removed as the treatment proceeded along with decrease in chemical oxygen demand (COD) (<50mgL(-1)) in the effluent. However, in these treatment processes the genotoxicity was not significantly reduced, but an increase in genotoxicity was observed. Both MN and comet assays showed similar results. The eliminated effluent may pose genotoxic threaten although its COD level has met the Chinese Sewage Discharge Standard. This study suggests that further treatment of the wastewater is required after the A/O process to remove the genotoxicity and minimize the ecotoxicological risk.
    Chemosphere 12/2012; · 3.14 Impact Factor
  • Yunqing Zhu, Shuo Chen, Xie Quan, Yaobin Zhang
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    ABSTRACT: In the past decades, catalyst stability and metal ions leaching have always been one of the most important issues in the heterogeneous peroxymonosulfate (PMS) activation system. In this work, cobalt implanted TiO2 was proposed as an effective catalyst for improving the catalyst stability and inhibiting cobalt leaching. A simple hydrolysis method was employed for the preparation of nanocatalysts with Co(NO3)2·6H2O and Ti(OC3H7)4 as precursors. Characterization by X-ray diffractometry, X-ray photoelectron spectroscopy and temperature programmed reduction indicated that the doped cobalt uniformly distributed in the faces of TiO2 crystallite as Co2+ and interacted with TiO2 through a strong Co–O–Ti bond. Compared to the Co3O4 immobilized TiO2 catalysts, the cobalt ion implanted TiO2 nanocatalysts reduced half of the cobalt dosage but exhibited paralleled catalytic activity and, moreover, the cobalt leaching declined about 60%. The reduction of cobalt dosage, uniform distribution of Co2+ in the TiO2 crystal lattice and the strong interaction of Co2+ with TiO2 support were believed to improve the performance in heterogeneous activation of peroxymonosulfate (PMS) and decrease the cobalt leaching.
    RSC Advances 12/2012; 3(2):520-525. · 2.56 Impact Factor
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    ABSTRACT: Azo dye wastewater treatment was enhanced in an acidogenic reactor (A1) by Fe(0) dosing. Both COD (50%) and color (60%) removal in A1 were stable when the dye concentrations were increased from 200 to 800 mg/L. However, the performances of a Fe(0)-free control reactor (A2) showed low COD (34%) and color (32%) removals. The reason was attributed that Fe(0) dosing enhanced the activity of fermentative bacteria, which played an important role in acidogenesis and decolorization. The methanogenic reactor fed with the effluent of A1 exhibited higher removal efficiency and treatment stability. These results suggested that Fe(0) powder dosing was helpful to improve acidogenesis and decolorization to create a favorable feeding condition for the subsequent methanogenic treatment.
    Bioresource Technology 07/2012; 121:148-53. · 4.75 Impact Factor
  • Jingxin Zhang, Yaobin Zhang, Xie Quan
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    ABSTRACT: High salinity wastewater is often difficult to treat using common anaerobic technologies. Considering that high conductivity of salinity wastewater may enhance electrodes reaction to accelerate the decomposition of volatile fatty acids produced in anaerobic digestion, a pair of electrodes was packed into an anaerobic reactor (R1) with the aim to enhance the treatment of salinity wastewater. With increasing the salt concentration (NaCl) gradually from 0 to 50 g/L in 137 days' operation, COD removal in this reactor under the voltage for the electrodes of 1.2 V was well maintained at 93%, while the COD removal in a reference anaerobic reactor without electrodes (R2) decreased to 53%. When the voltage for R1 was cut off, about 10% COD removal was declined, which was still 30 percentage points higher than that in R2. The electrodes enhanced the biodegradation of volatile fatty acids, especially propionate. Fluorescence in situ hybridization analysis confirmed that the relative abundance of propionate-utilizing bacteria in R1 was significantly higher than that in R2. PCR-DGGE analysis of bacteria and archaea domains indicated that the electric field stimulation effectively enriched salt-adapted microorganisms during the treatment.
    Water Research 04/2012; 46(11):3535-43. · 4.66 Impact Factor
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    ABSTRACT: Slow proliferation of anammox bacteria is a major problem limiting the wider application of anammox technology in practical wastewater treatment. A novel anammox reactor packed with a Fe electrode was developed for enhancing anammox consortium activity and accelerating the startup of anammox process. After 125 days' operation, total nitrogen removal rate achieved 1209.6 mg N/L/d in this hybrid reactor (R1), which was significantly higher than that in a control anammox reactor without Fe electrode (R2, 973.3 mg N/L/d). Raising the voltage applied for the electrode in a given extent (≤0.6 V) enhanced the performance of the reactor, while the voltage more than 0.8 V reduced the anammox performance. Scanning electron microscope (SEM) observation along with transmission electron microscope (TEM) analysis of the sludge taken from the reactors revealed that a more compacted microbial community structure was formed in R1. Fluorescence in situ hybridization (FISH) together with DNA analysis indicated that anammox bacteria were highly enriched with the presence of the Fe electrode.
    Bioresource Technology 03/2012; 114:102-8. · 4.75 Impact Factor
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    ABSTRACT: Zero valent iron (ZVI) is expected to help create an enhanced anaerobic environment that might improve the performance of anaerobic treatment. Based on this idea, a novel ZVI packed upflow anaerobic sludge blanket (ZVI-UASB) reactor was developed to treat azo dye wastewater with variable influent quality. The results showed that the reactor was less influenced by increases of Reactive Brilliant Red X-3B concentration from 50 to 1000 mg/L and chemical oxygen demand (COD) from 1000 to 7000 mg/L in the feed than a reference UASB reactor without the ZVI. The ZVI decreased oxidation-reduction potential in the reactor by about 80 mV. Iron ion dissolution from the ZVI could buffer acidity in the reactor, the amount of which was related to the COD concentration. Fluorescence in situ hybridization test showed the abundance of methanogens in the sludge of the ZVI-UASB reactor was significantly greater than that of the reference one. Denaturing gradient gel electrophoresis showed that the ZVI increased the diversity of microbial strains responsible for high efficiency.
    Journal of Environmental Sciences 01/2012; 24(4):720-7. · 1.77 Impact Factor
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    ABSTRACT: Textile industries are important sources of toxic discharges and contribute enormously to water deterioration, while little attention has been paid to the toxicity of textile effluents in discharge regulation. Bioassays with zebrafish were employed to evaluate the toxicity of wastewater samples collected from different stages at a textile factory and sewage treatment plants (STPs). Physico-chemical parameters, acute toxicity, genotoxicity and oxidative stress biomarkers were analyzed. The wastewater samples from bleaching, rinsing and soaping of the textile factory exhibited high acute toxicity and genotoxicity. The coexisting components of dye compounds, as assistants and oxidants, seemed to cause some effect on the toxic response. After treatment employing the anoxic-oxic (A/O) process in STPs, the color and the chemical oxygen demand (COD) were reduced by 40% and 84%, respectively, falling within the criteria of the Chinese Sewage Discharge Standard. In contrast, increases in acute toxicity and genotoxicity were observed in the anaerobic tank, indicating the formation of toxic intermediates. The genotoxicity of the effluent of the STP was not significantly different from that of the influent, suggesting the wastewater treatment processes were not effective in removing the genotoxicity of the dye wastewater. Results indicated that the effluent contains pro-oxidants since the activities of glutathione (GSH), malondialdehyde (MDA), and total anti-oxidation capacity (T-AOC) were all elevated. In addition, decreases in superoxide dismutase (SOD) and glutathione-S transferase (GST) activities observed can be interpreted as a cytotoxicity sign due to an over-production of reactive oxygen species (ROS). The results of the present study suggest that the STPs were not capable of reducing the toxicity of wastewater sufficiently. Further treatment is needed to remove the potential risks posed by textile effluent to ecosystems and human health, and employing a toxicity index is necessary for discharge regulation.
    Journal of Environmental Sciences 01/2012; 24(11):2019-27. · 1.77 Impact Factor
  • Xiaona Li, Shuo Chen, Xie Quan, Yaobin Zhang
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    ABSTRACT: Removal of perfluorooctanoic acid (PFOA) and perfluorooctane sulfonate (PFOS) from aqueous solution has attracted wide attention in light of their environmental persistence, bioaccumulation, and potential toxicity. Although various destructive technologies were developed, removal of PFOX (X = A and S) under mild conditions are still desirable. In this work, multiwalled carbon nanotubes (MWNTs) were applied to remove PFOX in electrochemically assistant adsorption. Electrosorption kinetics and isotherms were investigated relative to open circuit (OC) adsorption and adsorption on powder MWNTs. Compared with powder MWNTs adsorption, the initial adsorption rate (υ(0)) of 100 μg/L PFOX at 0.6 V increased 60-fold (PFOA) and 41-fold (PFOS) according to pseudosecond-order kinetics model and the maximum electrosorption capacity (q(m)) of PFOX (50 μg/L to 10 mg/L) increased 150-fold (PFOA) and 94-fold (PFOS) simulated with Langmuir model. These significant improvements were assumed to benefit from enhanced electrostatic attraction under electrochemical assistance. Furthermore, the used MWNTs were found to be regenerative and reusable. This work provides not only a new approach to effective removal of perfluorochemicals from aqueous solution but also a low energy-consumption and environmentally-friendly strategy for application of carbon nanotubes in water treatment.
    Environmental Science & Technology 08/2011; 45(19):8498-505. · 5.26 Impact Factor

Publication Stats

254 Citations
7 Downloads
3k Views
207.04 Total Impact Points

Institutions

  • 2006–2012
    • Dalian University of Technology
      • • Department of Environmental Science and Technology
      • • School of Environmental and Biological Science and Technology
      Dalian, Liaoning, China
  • 2009
    • Dalian Polytechnic University
      Lü-ta-shih, Liaoning, China