TY - JOUR
T1 - Predicting adsorption isotherms of organic micropollutants by high-silica zeolite mixtures
AU - Zheng, Xinyu
AU - Jiang, Nan
AU - Zheng, Huaili
AU - Wu, Yuyang
AU - Heijman, Sebastiaan G.J.
PY - 2021
Y1 - 2021
N2 - One framework type of high-silica zeolite only can effectively remove a limited range of organic micropollutants (OMPs) from water. In order to extend the OMP removal range, different types of high-silica zeolites need to be combined in the adsorption process. In this study, Mordernite (MOR) and ZSM-5 (MFI) high-silica zeolite powders were mixed in different mass ratios. The removal performances of eight OMPs by zeolite mixtures, as well as single MOR and MFI zeolites, were evaluated through batch adsorption experiments to investigate their adsorption behaviors and mechanisms. When there was only one solute in water, the adsorption isotherms of OMPs by zeolite mixtures were well predicted by combining the experimental adsorption isotherms of single zeolites based on the mass ratios of single zeolites. In multi-solute water, adsorption isotherms by zeolite mixtures were calculated with less accuracy when solely combining experimental isotherms of single zeolites, especially in the case of having a lower portion of more-effective zeolite in the mixture. This could be attributed to the competition for more-effective zeolite between different OMPs.
AB - One framework type of high-silica zeolite only can effectively remove a limited range of organic micropollutants (OMPs) from water. In order to extend the OMP removal range, different types of high-silica zeolites need to be combined in the adsorption process. In this study, Mordernite (MOR) and ZSM-5 (MFI) high-silica zeolite powders were mixed in different mass ratios. The removal performances of eight OMPs by zeolite mixtures, as well as single MOR and MFI zeolites, were evaluated through batch adsorption experiments to investigate their adsorption behaviors and mechanisms. When there was only one solute in water, the adsorption isotherms of OMPs by zeolite mixtures were well predicted by combining the experimental adsorption isotherms of single zeolites based on the mass ratios of single zeolites. In multi-solute water, adsorption isotherms by zeolite mixtures were calculated with less accuracy when solely combining experimental isotherms of single zeolites, especially in the case of having a lower portion of more-effective zeolite in the mixture. This could be attributed to the competition for more-effective zeolite between different OMPs.
KW - High-silica zeolite mixture
KW - Organic micropollutants
KW - Adsorption isotherm prediction
KW - Water treatment
UR - http://www.scopus.com/inward/record.url?scp=85118831472&partnerID=8YFLogxK
U2 - 10.1016/j.seppur.2021.120009
DO - 10.1016/j.seppur.2021.120009
M3 - Article
SN - 1383-5866
VL - 282
JO - Separation and Purification Technology
JF - Separation and Purification Technology
IS - Part A
M1 - 120009
ER -