Real-time monitoring of organic contaminant adsorption in activated carbon filters using spectral induced polarization

TY - JOUR

T1 - Real-time monitoring of organic contaminant adsorption in activated carbon filters using spectral induced polarization

AU - Ben Moshe, Shany

AU - Furman, Alex

N1 - Publisher Copyright: © 2022 Elsevier Ltd

PY - 2022/4/1

Y1 - 2022/4/1

N2 - Real-time, in-situ monitoring of adsorption processes in activated carbon (AC) filters may advance the effectiveness, reliability and economical value of such systems. In this study, the applicability of spectral induced polarization (SIP) as a real-time monitoring tool was examined. The adsorption of anionic and cationic organic dyes to commercial-AC filter was examined using a set of breakthrough experiments combined with continuous SIP monitoring. The imaginary part of the complex electrical conductivity decreased in the range of 0.25−2.5Hz for both dyes. During the adsorption of the cationic dye, a new peak developed in the range of 7−40Hz, suggesting the dominance of surface processes that are not explained by the classic stern-layer polarization theory. The recorded imaginary conductivity values were used as a proxy for adsorbed dye concentration in the calibration process of a reactive transport model. The model confirmed that SIP can successfully be used for real-time monitoring of the dye progression through the filter. The applicability of SIP as an effective monitoring tool was also shown for cyclic operation (adsorption-desorption cycles).

AB - Real-time, in-situ monitoring of adsorption processes in activated carbon (AC) filters may advance the effectiveness, reliability and economical value of such systems. In this study, the applicability of spectral induced polarization (SIP) as a real-time monitoring tool was examined. The adsorption of anionic and cationic organic dyes to commercial-AC filter was examined using a set of breakthrough experiments combined with continuous SIP monitoring. The imaginary part of the complex electrical conductivity decreased in the range of 0.25−2.5Hz for both dyes. During the adsorption of the cationic dye, a new peak developed in the range of 7−40Hz, suggesting the dominance of surface processes that are not explained by the classic stern-layer polarization theory. The recorded imaginary conductivity values were used as a proxy for adsorbed dye concentration in the calibration process of a reactive transport model. The model confirmed that SIP can successfully be used for real-time monitoring of the dye progression through the filter. The applicability of SIP as an effective monitoring tool was also shown for cyclic operation (adsorption-desorption cycles).

KW - Activated carbon

KW - Adsorption

KW - Organic dyes

KW - Real-time monitoring

KW - Spectral induced polarization

KW - Water purification

UR - http://www.scopus.com/inward/record.url?scp=85123192065&partnerID=8YFLogxK

U2 - 10.1016/j.watres.2022.118103

DO - 10.1016/j.watres.2022.118103

M3 - 文章

C2 - 35081496

AN - SCOPUS:85123192065

SN - 0043-1354

VL - 212

JO - Water Research

JF - Water Research

M1 - 118103

ER -