《Table 4–Parameters fitted by Langmuir and Freundlich models.》

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《One-step preparation of polyimide-inlaid amine-rich porous organic block copolymer for efficient removal of chlorophenols from aqueous solution》

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River water contains various inorganic and organic pollutants such as heavy metal ions，dyes，phenols，etc.In the natural adsorption process of a target contaminant，these pollutants compete with the adsorbate，which may reduce the adsorption capacity（Fukuhara et al.，2006；Nam et al.，2014）.The capacities of 2，4-DCP adsorption by ARPOP and PI-b-ARPOP in river water are plotted in Fig.10a，and the linear fitting curves and parameters of the Langmuir model are shown in Fig.10b.Compared with the results of adsorption experiments in ultra-pure water（Fig.8 and Table 4），the adsorption amounts in river water were slightly lowered.In detail，the qmaxvalues for MA/TA（4/4），MA/TA/PMDA（4/3/1），MA/TA/PMDA（4/2/2）and MA/TA/PMDA（4/1/3）decreased from 188.70 mg/g240.96 mg/g，282.49 mg/g and 220.26 mg/g to 185.19 mg/g234.74 mg/g，277.78 mg/g and 213.68 mg/g，respectively.This implied that the micropollutants in river water partly competed with 2，4-DCP in the adsorption process.Hence the results show that PI-b-ARPOP can be successfully applied in the practical treatment of chlorophenols in natural wastewater.