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  • IWA Publishing  (2)
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  • IWA Publishing  (2)
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  • 1
    Online Resource
    Online Resource
    Chromium removal capability and photosynthetic characteristics of Cyperus alternifolius and Coix lacryma-jobi L. in vertical flow constructed wetland treated with hexavalent chromium bearing domestic sewage
    IWA Publishing ; 2017
    In:  Water Science and Technology Vol. 76, No. 8 ( 2017-10-25), p. 2203-2212
    Details
    In: Water Science and Technology, IWA Publishing, Vol. 76, No. 8 ( 2017-10-25), p. 2203-2212
    Abstract: In this study, the chromium removal capability and photosynthetic capacity response of plants were investigated in vertical flow wetland microcosms (VFWM) treated with Cr(VI) bearing domestic sewage. Two plants, Cyperus alternifolius (C. alternifolius) and Coix lacryma-jobi L. (C. lacryma-jobi L.) grown in the VFWM enhanced the purification of Cr(VI) enriched domestic sewage. Cr concentration in the effluent fell below detection limit ( & lt;0.03 mg L−1), except for the C. alternifolius wetland treated with 40 mg L−1 Cr(VI). The biomasses of both plants species were increased at 10 and 20 mg L−1 Cr(VI) exposure but inhibited at 40 mg L−1 Cr(VI). The photosynthetic capacities of both plants were not affected at 10–40 mg L−1 Cr(VI) exposure during the days 20–60. However, they were inhibited significantly (P & lt; 0.05) at 40 mg L−1 Cr(VI) exposure during days 80–100. These results demonstrated that a VFWM with C. alternifolius and/or C. lacryma-jobi L. was capable of maintaining its efficiency and recovering its vegetation. VFWM with C. alternifolius and/or C. lacryma-jobi L. was promising for purifying wastewater which contains low to medium concentrations of Cr(VI) ( & lt;20 mg L−1).
    Type of Medium: Online Resource
    ISSN: 0273-1223 , 1996-9732
    URL: Article
    DOI: 10.2166/wst.2017.396
    Language: English
    Publisher: IWA Publishing
    Publication Date: 2017
    detail.hit.zdb_id: 764273-8
    detail.hit.zdb_id: 2024780-1
    SSG: 14
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    Online Resource
  • 2
    Online Resource
    Online Resource
    Adsorption characteristics of ciprofloxacin on the schorl: kinetics, thermodynamics, effect of metal ion and mechanisms
    IWA Publishing ; 2018
    In:  Journal of Water Reuse and Desalination Vol. 8, No. 3 ( 2018-09-01), p. 350-359
    Details
    In: Journal of Water Reuse and Desalination, IWA Publishing, Vol. 8, No. 3 ( 2018-09-01), p. 350-359
    Abstract: In this study, schorl was used as an effective adsorbent for ciprofloxacin removal from wastewater. The adsorption performance, mechanism and effect of metal ion on sorption were investigated. Adsorption capacity reached a maximum (8.49 mg/g) when the pH value was 5.5. The pseudo-second-order kinetic model and Freundlich model could better describe the experimental data. The negative ΔH (–22.96 KJ/mol) value showed that the adsorption process was exothermic. The results also indicated physical adsorption existed on the adsorption process, which was in agreement with the analysis of X-ray diffraction, scanning electron microscopy, Fourier transform infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopy. The desorption rate could reach 94%, which suggested that schorl had a good desorption and regeneration performance. Coexisting ions, such as Cu2+ and Al3+, could obviously inhibit adsorption, and the inhibition from Al3+ was significantly higher than that from Cu2+. However, the additional Zn2+ could slightly promote the adsorption.
    Type of Medium: Online Resource
    ISSN: 2220-1319 , 2408-9370
    URL: Article
    DOI: 10.2166/wrd.2017.143
    Language: English
    Publisher: IWA Publishing
    Publication Date: 2018
    detail.hit.zdb_id: 2841160-2
    detail.hit.zdb_id: 3073319-4
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