TY - JOUR
T1 - Adsorptive removal of methylchlorophenoxypropionic acid from water with a metal-organic framework
AU - Seo, Yeo S.
AU - Khan, Nazmul Abedin
AU - Jhung, Sung Hwa
N1 - Publisher Copyright:
© 2015 Elsevier B.V.
PY - 2015/6/5
Y1 - 2015/6/5
N2 - For the first time, the adsorptive removal of methylchlorophenoxypropionic acid (MCPP) from water, using a metal-organic framework (MOF), namely Zr-benzenedicarboxylate (UiO-66), was investigated to determine the applicability of MOFs in the removal of hazardous herbicides/pesticides from contaminated water. Compared with activated carbon, UiO-66 has a very high adsorption rate (kinetic constant ~30 times that of activated carbon). This rapid adsorption is remarkable because the pore size of UiO-66 is smaller than that of activated carbon. Moreover, the adsorption capacity of UiO-66 is higher than that of activated carbon especially at low MCPP concentrations (~7.5 times at 1. ppm of MCPP). These rapid and high uptakes by UiO-66 suggest that there is a special mechanism for interactions between MCPP and UiO-66. Additionally, the adsorbent can be reused for adsorptive removal by washing the spent adsorbent with a simple solvent. MOFs such as UiO-66 are therefore potential adsorbents for use in the adsorptive removal of MCPP from contaminated water. A plausible adsorption mechanism is suggested based on the effects of pH on the zeta potential of the adsorbent and on adsorption. For the adsorption of MCPP by UiO-66, electrostatic and π-. π interactions might both be important.
AB - For the first time, the adsorptive removal of methylchlorophenoxypropionic acid (MCPP) from water, using a metal-organic framework (MOF), namely Zr-benzenedicarboxylate (UiO-66), was investigated to determine the applicability of MOFs in the removal of hazardous herbicides/pesticides from contaminated water. Compared with activated carbon, UiO-66 has a very high adsorption rate (kinetic constant ~30 times that of activated carbon). This rapid adsorption is remarkable because the pore size of UiO-66 is smaller than that of activated carbon. Moreover, the adsorption capacity of UiO-66 is higher than that of activated carbon especially at low MCPP concentrations (~7.5 times at 1. ppm of MCPP). These rapid and high uptakes by UiO-66 suggest that there is a special mechanism for interactions between MCPP and UiO-66. Additionally, the adsorbent can be reused for adsorptive removal by washing the spent adsorbent with a simple solvent. MOFs such as UiO-66 are therefore potential adsorbents for use in the adsorptive removal of MCPP from contaminated water. A plausible adsorption mechanism is suggested based on the effects of pH on the zeta potential of the adsorbent and on adsorption. For the adsorption of MCPP by UiO-66, electrostatic and π-. π interactions might both be important.
KW - Adsorption
KW - Adsorption mechanism
KW - Metal-organic frameworks
KW - Methylchlorophenoxypropionic acid
KW - UiO-66
UR - http://www.scopus.com/inward/record.url?scp=84922998440&partnerID=8YFLogxK
U2 - 10.1016/j.cej.2015.02.007
DO - 10.1016/j.cej.2015.02.007
M3 - Article
AN - SCOPUS:84922998440
SN - 1385-8947
VL - 270
SP - 22
EP - 27
JO - Chemical Engineering Journal
JF - Chemical Engineering Journal
ER -