H. Lü

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

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Publications (10)0.36 Total impact

  • J.-T. Zhou · Y. Wang · H. Lü · J. Wang · X. Yang
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    ABSTRACT: The accelerating effect of anthraquinone-2-sulfonate (AQS) immobilized in polyurethane foam (PUF) on anaerobic bio-decolorization of azo dye Reactive Brilliant Red X-3B by activated sludge is investigated. The experimental results show that the sludge concentration, electron donors and temperature have different effects on AQS-PUF mediated bio-decolorization of Reactive Brilliant Red X-3B. After 10 repeated experiments using AQS-PUF under the anaerobic conditions (30 °C, 1.8 g·L-1 sludge and 1.5 g·L-1 sodium formate), immobilized AQS-mediated bio-decolorization efficiency of Reactive Brilliant Red X-3B retains 90% of their original value. The decolorization efficiencies of Reactive Brilliant Red X-3B are obviously enhanced using AQS-PUF during 30 days running. Compared with the lacking immobilized AQS, the start-up time of bio-decolorization of Reactive Brilliant Red X-3B is significantly shortened using AQS-PUF under anaerobic conditions.
    No preview · Article · Mar 2013 · Dalian Ligong Daxue Xuebao/Journal of Dalian University of Technology
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    ABSTRACT: Anthraquionne-2-sulfonate (AQS) was immobilized on the surface of ceramsites to form AQS-ceramsites by using adsorption/covalence coupling method, and its catalytic performance on the chemical decolorization of azo dyes was investigated in the absence of oxygen. The results show that AQS could be immobilized on the ceramsites, and the concentration of immobilized AQS is 2.3 μmol·g-1. The optimal conditions for AQS-ceramsites mediated decolorization of Acid Yellow G were found to be 3.2 mmol·L-1 Na2S and pH 6.0. Under the above optimal conditions, its decolorization kinetics could be described by using a pseudo first-order equation. Moreover, with the increase of the concentration of the immobilized AQS, the pseudo-first-order rate constant of the decolorization of Acid Yellow G obviously increases. In the presence of 60 μmol·L-1 immobilized AQS, the rate constants of the decolorization of Acid Yellow G, Reactive Red X-3B, Amaranth and Acid Orange 7 increase respectivety 2.9, 5.3, 9.9 and 6.0 fold higher than those without using AQS-ceramsites. Furthermore, experiments with repeated used AQS-ceramsites show that their decolorization efficiencies of azo dyes could remain over 98% of their original value. These studies indicate that the novel immobilized AQS as redox mediators has potential applications in the treatment of azo dyes wastewater.
    No preview · Article · Dec 2012 · Gao Xiao Hua Xue Gong Cheng Xue Bao/Journal of Chemical Engineering of Chinese Universities
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    ABSTRACT: The continuous dosing and discharge of water-soluble redox mediators, such as biologically recalcitrant compounds, will result in the secondary contamination. The immobilized redox mediator prepared by incorporation of anthraquinonedisulphonate (AQDS) during the electropolymerization of pyrrole monomer on active carbon felt (ACF) electrode, AQDS/PPy/ACF, was used for catalyzing anaerobic biotransformation of 2, 6-dinitrotoluene (2, 6-DNT). The results show that the morphology of the PPy film largely depends on the surface texture of substrate materials, the PPy films depositing on Pt are characterized by a cauliflower-like structure, and those on ACF by some globular structure; AQDS/PPy/ACF exhibits good catalytic activity and stability for 2, 6-DNT, the enhanced reduction rate obtained in the incubations with AQDS/PPy/ACF is about four times that of the incubations without AQDS/PPy/ACF, and the corresponding first-order reduction rate constant reaches 0.0345 h-1; 2, 6-DNT is reduced to be 2, 6-diaminotoluene via 2-amino-6-nitrotoluene in the system.
    No preview · Article · Nov 2010 · Dalian Ligong Daxue Xuebao/Journal of Dalian University of Technology
  • W.-L. Si · H. Lü · J.-T. Zhou · X.-J. Zhou · J. Wang
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    ABSTRACT: The accelerating effect of anthraquinone immobilized in polyurethane foam (PUF) on the biodecolorization of azo dyes was investigated. The results show that, during the biodecolorization, the anthraquinone plays a role of redox mediator, and the optimal conditions for the biodecolorization of amaranth are: 2 g · L-1 glucose, pH 8.0~9.0 and 90 mg · L-1 anthraquinone. Using adsorption method, the anthraquinone was immobilized in 2 polyurethane foam cubes, and the biodecolorization rate of azo dyes in the presence of immobilized anthraquinone is increased 1~3 fold compared with that without anthraquinone. Moreover, the accelerating effect of immobilized anthraquinone is equivalent to that of suspended anthraquinone, while using the immobilized anthraquinone, the anthraquinone loss is much lesser than that of suspended anthraquinone. The reusability of the anthraquinone immobilized in PUF was evaluated with repeated-batch decolorization experiments. After experiments of 10 times repeated using, the decolorization efficiency of the immobilized anthraquinone retains over 90% of its original activity. This indicates that the method of anthraquinone immobilization in polyurethane foam has potential application value for accelerating the anaerobic biodecolorization of azo dyes.
    No preview · Article · Jun 2010 · Gao Xiao Hua Xue Gong Cheng Xue Bao/Journal of Chemical Engineering of Chinese Universities
  • J. Wang · C.-L. Zheng · J.-T. Zhou · H. Lü · Y.-Y. Qu
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    ABSTRACT: Three effective nitrobenzene degrading strains, Rhodotorula mucilaginosa Z1, Streptomyces albidoflavus Z2 and Micrococcus luteus Z3 were isolated and identified. A defined microbial consortium was constructed through orthogonal experiments by using Z1, Z2 and Z3. The optimal ratio of Z1 to Z2 to Z3 is 1:3:3. Compared with pure strains, the consortium can degrade nitrobenzene under severe conditions and has a wider substrates range. Considering the characteristics of actual nitrobenzene wastewater, nitrobenzene degradation was investigated by the consortium under high salinity, as well as phenol or aniline co-existence with nitrobenzene. The consortium can degrade nitrobenzene effectively in high salinity of 5% (NaCl). The degradation of nitrobenzene (200 mg/L) by the consortium is not influenced in the presence of 100 mg/L phenol or 50 mg/L aniline.
    No preview · Article · Nov 2009 · Dalian Ligong Daxue Xuebao/Journal of Dalian University of Technology
  • Wei Zhang · Jing Wang · Hong Lü · Ji-ti Zhou · Ruo-fei Jin
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    ABSTRACT: Combined ALR-BAC was used to treat bromoamine acid wastewater. The results showed that the ALR system could run steadily for over 1 months at the BAA concentration 650 mg x L(-1) after one-month acclimation, the decoloration rate of BAA was reached to about 90% within 12 h, and the removal rate of COD was about 50%, the precipitation performance of the suspended microorganism was good. When the influent bromoamine acid concentration was above 200 mg x L(-1), the decolorization products of BAA were easy to undergo auto-oxidation and the yellow intermediate products which were difficult to biodegrade were formed. The BAC process could inhibit the auto-oxidation of the decolorization products effectively, and the decolorization products could be biodegraded gradually. When there were no added sulphate, the concentrations of Br- and SO4(2-) were increased as the COD concentration reduced. Ultimately, the release rates of Br- and SO4(2-) were 72.2% and 66.9%, the COD removal efficiency was about 85.7%.
    No preview · Article · Oct 2009 · Huan jing ke xue= Huanjing kexue / [bian ji, Zhongguo ke xue yuan huan jing ke xue wei yuan hui "Huan jing ke xue" bian ji wei yuan hui.]
  • H. Lü · J.-T. Zhou · J. Wang · T.-M. Lei · Y.-Y. Su
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    ABSTRACT: The bromoamine acid (BAA) mediated decolorization of sulfonated azo dyes by BAA degrading strain (Sphingomonas xenophaga QYY) was investigated. The results show the optimal conditions of the decolorization of Acid Red 3R: initial pH 8.0, temperature 30°C, glucose 4 g·L-1 and sodium acetate 4 g·L-1. When the concentration of additional BAA ranges from 19.1 mg·L-1 to 152.8 mg·L-1, the decolorization rate of Acid Red 3R increases 0.3-1.9 times. And it can improve the decolorization rate of other sulfonated azo dyes. Five repeated experiments show that BAA is able to efficiently promote decolorization of sulfonated azo dyes. Moreover, strain QYY can degrade BAA in 24 h under aerobic condition after completing decolorization of Acid Red 3R in every run.
    No preview · Article · Jul 2009
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    ABSTRACT: Aiming at intermediate autoxidation and bioactivity inhibition by hypersaline in anaerobic-aerobic biological treatment processes of azo dyes-loading wastewater, biodegradation characteristics of Acid Orange 7 (AO7) at the NaCl concentration of 100 g/L were investigated using some enhancement strategies. Addition of glucose (0.5g/L), peptone (1g/L) and yeast powder (0.5g/L) was propitious to the degradation of AO7 under hypersaline conditions. Biodecolorization rate of AO7 could be increased when acid red B was added to the anaerobic reactor. Anthraquinone-activated sludge self-immobilization system could enhance the biodecolorization of AO7 when anthraquinone was added to the salt-tolerant sludge and the maximal decolorization rate was about 92% at the anthraquinone concentration of 100mg/L. Addition of activated carbon felt as biological carrier allowed stable running of the anaerobic and aerobic reactors with a good sludge settlement and decoloration rate of 26.67mg/(L middot;h), and that the autoxidation of intermediate product 1-Amino-2-naphthol under aerobic condition could be inhibited effectively and over 90% of COD removal was maintained.
    No preview · Article · Jun 2009 · Zhongguo Huanjing Kexue/China Environmental Science
  • Hai-xin Ai · Ji-ti Zhou · Hong Lü
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    ABSTRACT: A novel strain of Micrococcus sp. DUT_AHX, which was isolated from the sludge of a nitrobenzene (NB)-manufacturing plant and could utilize NB as the sole carbon source, was identified on the basis of physiological and biochemical tests and 16S ribosomal DNA (rDNA) sequence analysis. It can grow at the temperature up to 40 °C or in the presence of NaCl concentration up to 12 g/L in Luria-Bertani (LB) medium. The optimal degradation conditions are as follows: temperature 37 °C, pH 7.0, and shaking speed 150 r/min. The strain involves a partial reductive pathway due to the release of ammonia and can also utilize 2-aminophenol as the sole carbon source. Furthermore, the enzyme activity tests show that crude extracts of NB-grown strain DUT_AHX mainly contain 2-aminophenol 1, 6-dioxygenase activity. The exploitation of salt-tolerant bacteria will be a remarkable improvement in NB bioremediation and wastewater treatment at high salinity and high temperature.
    No preview · Article · Apr 2009 · Journal of Central South University of Technology
  • Yan-Yan Su · Jing Wang · Ji-Ti Zhou · Hong Lü · Li-Hua Li
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    ABSTRACT: Enhanced biodecolourization of azo dyes by suspended and immobilized quinone-reducing community using kinds of anthraquinone dyes intermediators as redox mediators was investigated. The suspended bacterium community could enhance the biodecolourization of many kinds of azo dyes using bromoamine acid (BAA) as a redox mediator, the optimum conditions for Acid Red 3R were as follows: pH 6-9, glucose, BAA and initial dye concentrations 400-600 mg/L, 19-34.2 mg/L and < or = 900 mg/L, respectively. Under these conditions, the maximal decolourization rate was about 95%, which is reached within 7 h for suspended cells and 14 h for immobilized cells. However, the latter needed 38-57 mg/L BAA as a redox mediator. In addition, after 7 cycles without BAA addition, the decolourization rate of Acid Red 3R by immobilized cells retained over 85%.
    No preview · Article · Aug 2008 · Huan jing ke xue= Huanjing kexue / [bian ji, Zhongguo ke xue yuan huan jing ke xue wei yuan hui "Huan jing ke xue" bian ji wei yuan hui.]