Palygorskite for the uptake and removal of pharmaceuticals for wastewater treatment
作者： Zhaohui Li , Nicole M. Fitzgerald , Wei-Teh Jiang , Guocheng Lv
DOI: 10.1016/J.PSEP.2015.09.008
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摘要: Abstract In this study, ranitidine (RT), a cationic drug was tested for its removal by palygorskite (PA) under different physico-chemical conditions, such as initial RT concentrations, contact time, equilibrium solution pH, ionic strength, and temperature. FTIR, SEM, XRD analyses were conducted to determine the mechanisms of uptake on PA. The results showed that cation exchange or electrostatic interactions between negatively charged PA surfaces positively charge dimethylamine major mechanism when pH less than p K value RT. Under high 2,5-disubstituted furan group interacted with surface via delocalized π-bond, suggesting molecules parallel surface. larger values distribution coefficient π-bonds in multi-regression analysis confirmed these mechanisms. no expansion (1 1 0) reflection while SEM observation changes crystal size morphology, indicating sites limited external
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