State Environmental Protection Engineering Center for Pollution Treatment and Control in Textile Industry

Shanghai, China

State Environmental Protection Engineering Center for Pollution Treatment and Control in Textile Industry

Shanghai, China

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Wang J.,Donghua University | Huang M.,Donghua University | Huang M.,State Environmental Protection Engineering Center for Pollution Treatment and Control in Textile Industry | Zhang C.,Donghua University | Meng L.,Donghua University
Chinese Journal of Environmental Engineering | Year: 2017

Rejection of carbamazepine (CBZ) by three commercial forward osmosis (FO) membranes was investigated. The effects of membrane orientation, draw solution concentration, flow velocity, and draw solute were also explored. The results showed that the rejection of CBZ in the pressure-retarded osmosis mode was lower than that in FO mode. As draw solution concentration increased, the increase in CBZ rejection became slow and high draw concentration caused serious reverse salt flux. The effect of flow velocity on a thin-film composite with an embedded polyester screen (TFC-ES) was more significant than on the other two membranes. The cellulose triacetate membrane cast onto a non-woven backing (CTA-NW) displayed lower rejection as the flow velocity increased. NaCl was the most suitable draw solute for CBZ rejection. The rejection of CBZ increased with water flux, but high reverse salt flux may result in decrease of CBZ rejection. The cellulose triacetate membrane with an embedded polyester screen (CTA-ES) showed consistently higher CBZ rejection than the CTA-NW membrane, while the TFC-ES membrane showed even lower rejection than the CTA membranes. These results can provide parameters for the treatment of CBZ water by a FO process. © 2017, Science Press. All right reserved.


Pan T.,Donghua University | Li F.,Donghua University | Li F.,State Environmental Protection Engineering Center for Pollution Treatment and Control in Textile Industry | Du C.,Zhejiang GongShang University | And 5 more authors.
Huanjing Kexue Xuebao/Acta Scientiae Circumstantiae | Year: 2015

In this paper, the hydrophobic PVDF membranes were modified via UV-irradiation to graft the hydrophilic monomer poly(ethylene glycol) methacrylate (PEGMA) on the membrane surface, which can improve the hydrophilicity of the PVDF membrane. The addition of the N, N-methylene bisacrylamide (MBAA) as cross-linking agent was found to reduce the swelling of the PEG grafed-layer. The influence of the modification condition on membrane performance was investigated. The modified membranes were characterized with surface contact angle (CA), infrared spectroscopy (ATR-IR), scanning electron microscopy (SEM), and the filtration tests of emulsion. BSA solution were conducted to investigate the separation efficiency and anti-fouling ability of the modified membrane. The experimental results showed that the hydrophilicity and anti-fouling ability of the modified membranes were improved obviously. ©, 2015, Science Press. All right reserved.


Li R.,Shanghai University of Engineering Science | Liu Y.,Shanghai University of Engineering Science | Liu Y.,State Environmental Protection Engineering Center for Pollution Treatment and Control in Textile Industry | Mu R.,Shanghai University of Engineering Science | And 2 more authors.
Environmental Science and Pollution Research | Year: 2016

Petroleum hydrocarbons released to the environment caused by leakage or illegal dumping pose a threat to human health and the natural environment. In this study, the potential of a pulsed corona discharge plasma system for treating petroleum-polluted soils was evaluated. This system removed 76.93 % of the petroleum from the soil in 60 min with an energy efficiency of 0.20 mg/kJ. Furthermore, the energy and degradation efficiencies for the remediation of soil contaminated by single polyaromatic hydrocarbons, such as phenanthrene and pyrene, were also compared, and the results showed that this technology had potential in organic-polluted soil remediation. In addition, the role of water molecules was investigated for their direct involvement in the formation and transportation of active species. The increase of soil moisture to a certain extent clearly benefitted degradation efficiency. Then, treated soils were analyzed by FTIR and GC-MS for proposing the degradation mechanism of petroleum. During the plasma discharging processes, the change of functional group and the detection of small aromatic hydrocarbons indicated that the plasma active species attached petroleum hydrocarbons and degradation occurred. This technique reported herein demonstrated significant potential for the remediation of heavily petroleum-polluted soil, as well as for the treatment of organic-polluted soils. © 2016 Springer-Verlag Berlin Heidelberg


Rashid S.,Donghua University | Rashid S.,State Environmental Protection Engineering Center for Pollution Treatment and Control in Textile Industry | Shen C.,Donghua University | Shen C.,State Environmental Protection Engineering Center for Pollution Treatment and Control in Textile Industry | And 9 more authors.
RSC Advances | Year: 2015

In this study, despite the high adsorption ability, efficient catalytic activity of a chitosan-metal complex has been developed through the chelation of chitosan polymer with bimetals Cu(ii) and Fe(iii). The removal of C. I. Reactive Black 5 (RB 5) by the chitosan-Cu-Fe complex/H2O2 system was studied in the pH range from 4 to 12. The maximal dye removal rate was achieved at an optimal concentration of Cu and Fe in the chitosan-Cu-Fe matrix, demonstrating the combination of sorptive enrichment and catalytic degradation. The results indicated that TOC removal and discoloration of the dye achieved 89.9% and 96.5% in a short reaction time. The pH sensitivity of the chitosan complex, the effect of the coexisting ions and the adsorption of other anionic dyes were also studied. X-ray photoelectron spectroscopy (XPS), Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDX) were analyzed to study the structure of the chitosan bi-metal complex and a possible mechanism was proposed. © The Royal Society of Chemistry 2015.


Wu L.-X.,Donghua University | Wu L.-X.,State Environmental Protection Engineering Center for Pollution Treatment and Control in Textile Industry | Yang J.,Donghua University | Yang J.,State Environmental Protection Engineering Center for Pollution Treatment and Control in Textile Industry | And 4 more authors.
Zhongguo Huanjing Kexue/China Environmental Science | Year: 2015

Cobalt tetrasulfophthalocyanine was successfully immobilized on polystyrene resin, protecting them from the self-oxidation under oxidation conditions. The results showed that the removal efficiency of dye C. I. Acid Blue 25 achieved to 99% in the presence of polystyrene resin D201 supported cobalt tetrasulfophthalocyanine and hydrogen peroxide. Besides, the regeneration studies demonstrated that the polystyrene resin immobilized catalyst could be reused effectively. The main mechanism was that cobalt tetrasulfophthalocyanine was firmly anchored through the electronic interactions between the π electrons of the benzene rings of the polystyrene polymers in resin and macrocycle of phthalocyanines. Then its drawback of self-oxidation was improved and the catalytic activity was enhanced. ©, 2015, Zhongguo Huanjing Kexue/China Environmental Science. All right reserved.


Wang K.,Donghua University | Li K.-Z.,Donghua University | Zhou Y.-Y.,Donghua University | Liu Z.-H.,Donghua University | And 5 more authors.
Huanjing Kexue/Environmental Science | Year: 2015

A batch equilibrium method was used to investigate the adsorption characteristics of ciprofloxacin (CIP), tetracycline (TC), sulfamethoxazole (SMX) and triclosan (TCS) onto Huangpu River sediments. Effects of adsorption time, initial concentration, solution pH and temperature on the adsorption process were studied. The results showed that the adsorption process of these PPCPs onto sediments was a two-step process: a rapid adsorption followed by a slow balance. The equilibrium time was about 4 h. The pH value had a significant effect on the adsorption of CIP, TC and TCS, whereas the effect on SMX adsorption was negligible. The kinetic results indicated that the adsorption processes followed the pseudo-second-order model, with adsorption rate in the range of 4.89×10-3-1.96×10-2 kg·(min·mg)-1. Adsorption isotherms were well described by the Freundlich and linear equations. As temperature increased, the amount of SMX and TC adsorbed increased, whereas CIP and TCS decreased. CIP, TC and TCS had a strong tendency to adsorb onto sediments, while the adsorption of SMX was unfavorable. When the initial concentration of PPCPs was 10 mg·L-1, the equilibrium adsorption capacities of CIP, TC, SMX and TCS reached 702.8, 733.1, 54.7 and 695.0 mg·kg-1, respectively. ©, 2015, Science Press. All right reserved.


Dai R.,Donghua University | Chen X.,Donghua University | Chen X.,State Environmental Protection Engineering Center for Pollution Treatment and Control in Textile Industry | Luo Y.,Donghua University | And 4 more authors.
Water Research | Year: 2016

Inhibitory effect of azo dyes on anaerobic methanogenic wastewater treatment (AMWT) has been studied mainly focusing on biological toxicity in the batch test with simulated sole co-substrate. Detailed information on inhibitory effect and mechanism of azo dyes during the long-term operation with real complex co-substrate is limited. Moreover, whether redox mediator (RM) could remediate the inhibition is still unclear in previous studies, especially under the complex scenario. In this study, the real textile wastewater with alternative concentrations of azo dyes (0–600 mg/L) were used to operate a lab-scale high-rate anaerobic methanogenic bioreactor for 127 days, and 50 μM anthraquinone-2-sulfonate (AQS) as RM was added at the last period of operation. Azo dyes with concentration of 600 mg/L could cause significant inhibition on overall (decolorizing and methanogenic) performance of AMWT. Specific methanogenic activity assays showed that acetoclastic methanogens was more susceptible to high concentration azo dyes than hydrogenotrophic methanogens. The spatial distribution of extracellular polymeric substance in the anaerobic granular sludge (AGS) showed that the high biological toxicity of azo dyes was mainly attributed to enrichment effect in tightly bound-EPS (TB-EPS). The channels of AGS was clogged by azo dyes, which was evidenced by the hard release of aromatic amines in EPSs as well as decreased porosity of AGS and scanning electron microscope images. Meanwhile, the settling ability, particle size and strength of AGS all deteriorated after azo dyes concentration exceeded 450 mg/L. The dosing of AQS could mostly remediate overall performance of the bioreactor even if the recovery of acetoclastic methanogens was slow. However, except for the porosity with a part of recovery, physical characteristics of AGS hardly recovered, and washout of sludge from the bioreactor was still happening. It suggested that additional attention should be paid to prevent sludge from washout if RM was practically used to remediate the anaerobic reactor inhibited by azo dyes. © 2016 Elsevier Ltd


Chen X.,Donghua University | Chen X.,State Environmental Protection Engineering Center for Pollution Treatment and Control in Textile Industry | Dai R.,Donghua University | Xiang X.,Donghua University | And 4 more authors.
Water Science and Technology | Year: 2016

The shock resistance characteristic (SRC) of an anaerobic bioreactor characterizes the ability of the anaerobic community in the reactor to withstand violent change in the living environment. In comparison with an upflow anaerobic sludge blanket reactor (UASBR), the SRC of a spiral symmetry stream anaerobic bio-reactor (SSSAB) was systematically investigated in terms of removal efficiency, adsorption property, settling ability, flocculability and fluctuations in these parameters. A quantitative assessment method for SRC was also developed. The results indicated that the SSSAB showed better SRC than the UASBR. The average value (m value) of chemical oxygen demand removal rates of the SSSAB was 86.0%. The contact angle of granules in the SSSAB present gradient distribution, that is the m value of contact angle increasing from bottom (84.5W) to top (93.9W). The m value of the density at the upper and lower sections of the SSSAB were 1.0611 g•cm-3 and 1.0423 g•cm-3, respectively. The surface mean diameter of granules in the SSSAB increased from 1.164 to 1.292 mm during operation. The absolute m value of zeta potential of granular sludge at the upper and lower sections of the SSSAB were 40.4 mV and 44.9 mV, respectively. The weighted mean coefficient variance (CV) value indicated SSSAB was more stable than the UASBR. © 2016 IWA Publishing.


Li R.,Donghua University | Sun Y.,Donghua University | Mu R.,Donghua University | Cheng W.,Donghua University | And 2 more authors.
Chinese Journal of Environmental Engineering | Year: 2016

Phenanthrene (PHE) contaminated soils were remediated by dielectric-barrier discharge (DBD) plasma. The effect of the power parameters (voltage, frequency, duty cycle, and discharging gap) on the input energy, as well as the influence of power, soil properties, and gas on the removal efficiency, was investigated. The optimal condition was selected for the post-treatment and mechanism study by considering the treatment effect, discharging properties, and energy utilization. The results showed that the removal efficiency of PHE contaminated soil by DBD plasma technology could reach 82% after treatment for 20 min in the following conditions. These conditions were input voltage 110 V, pulsed frequency 150 Hz, duty cycle 20%, discharging gap 1.5 cm, airflow rate 0.6 L·min-1, initial concentration 200 mg·kg-1, and water content of the soil 4%. The input power in this instance was 64 W and the energy efficiency was 0.04 mg·kJ-1. © 2016, Science Press. All right reserved.


Xiang X.,Donghua University | Chen X.,Donghua University | Chen X.,State Environmental Protection Engineering Center for Pollution Treatment and Control in Textile Industry | Dai R.,Donghua University | And 5 more authors.
Bioresource Technology | Year: 2016

Abundant organic compounds in textile dyeing sludge (TDS) provide possibility for its anaerobic digestion (AD) treatment. However, preliminary test showed little biogas generation in direct AD of the TDS during 20 days. In order to improve the AD availability of TDS, alkaline, acid, thermal and thermal alkaline pretreatments were performed. Color and aromatic amines were specifically measured as extra characteristics for the AD of TDS. The rate-limiting steps of AD of TDS were slow hydrolysis rate and inhibited acidogenesis, which were somewhat overcome by pretreatments. Thermal alkaline pretreated TDS performed best enhancement on solubilisation. The biochemical methane potential tests revealed that thermal pretreated TDS showed highest total methane production of 55.9 mL/g VSfed compared to the control with little methane generation. However, thermal alkaline pretreated TDS did not perform well in BMP test as expected. Moreover, the hydrophilicity of reactive dyes in TDS could seriously affect dewaterability of TDS. © 2016 Elsevier Ltd

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