Efficient removal of crystal violet by polyacrylic acid functionalized ZIF-67 composite prepared by one-pot synthesis

The adsorption of organic dyes by sorbents is one of the effective ways to resolve the problem of dye wastewater treatment . However, the limited adsorption capacity of adsorbents has always been a crucial factor that plagues the development and utilization of adsorbents. Herein, aiming at efficient adsorption for crystal violet (CV), polyacrylic acid (PAA) was incorporated into zeolitic imidazoline frameworks (ZIF-67) through an easy and environmentally friendly aqueous phase synthesis process at room temperature to synthesize adsorbent ZIF-67-PAA. Compared to pure ZIF-67, the obtained adsorbent ZIF-67-PAA showed excellent adsorption performance and the maximum adsorption capacity of CV can reach 1606 mg g −1 . The adsorption process is spontaneous and conformed to the Langmuir isotherm model and the pseudo-second-order kinetic model . The results show that the prepared ZIF-67-PAA is a potential and efficient adsorbent for CV removal.