A bio-electrochemical reactor coupled with adsorber for the removal of nitrate and inhibitory pesticide

    Research output: Contribution to journalArticle

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    Abstract

    In this study, the treatment characteristics of nitrate and toxic pesticide by a combined bioelectrochemical reactor (BER)/adsorption process was investigated. Experimental results showed that the disappearance of NO3 - in BER was in accordance with the applied current. NO2 - was not detected in the effluent, but the production of N2O was increased with increasing IPT loading. In the presence of IPT, up to 30% of the nitrate nitrogen consumed was converted to N2O, while more than 95% converted to N2 in the absence of IPT. In adsorption column, IPT was efficiently removed onto either granular activated carbon or silicone resin so as to meet the guideline value (40μg/l) and to reduce the N2O accumulation. A simplified kinetic model that considers the sequential reduction of nitrate and inhibition of the N2O reduction step by pesticide as well as Langmuir adsorption isotherm was developed and used to evaluate the process performance. Theoretically predicted effluent concentrations were in good agreement with the observed results for nitrate, nitrite, N2O, N2 and IPT. It was considered that high removal performance of nitrate and pesticide by the combined process is attributable to high affinity of adsorbates for IPT in comparison with relatively large inhibition constant (Ki).

    Original languageEnglish
    Pages (from-to)3092-3102
    Number of pages11
    JournalWater Research
    Volume36
    Issue number12
    DOIs
    Publication statusPublished - 2002

    Fingerprint

    Pesticides
    Nitrates
    pesticide
    nitrate
    adsorption
    Effluents
    effluent
    Adsorption
    Adsorbates
    Adsorption isotherms
    Silicones
    Activated carbon
    nitrite
    activated carbon
    resin
    isotherm
    reactor
    removal
    Nitrogen
    kinetics

    Keywords

    • Adsorption
    • BER
    • Combined process
    • Drinking water
    • Inhibition
    • Nitrate
    • Pesticide

    ASJC Scopus subject areas

    • Earth-Surface Processes

    Cite this

    A bio-electrochemical reactor coupled with adsorber for the removal of nitrate and inhibitory pesticide. / Feleke, Z.; Sakakibara, yutaka.

    In: Water Research, Vol. 36, No. 12, 2002, p. 3092-3102.

    Research output: Contribution to journalArticle

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