Remediation of water tainted with noxious aspirin and fluoride ion using UiO-66-NH2 loaded peanut shell

One green adsorbent, UiO-66-NH 2 modified peanut shell (c-PS-MOF), was prepared in a green synthetic route for improving the capture level of aspirin (ASP) and fluoride ion (F – ). The adsorption properties of c-PS-MOF were evaluated by batch experiments and its physicochemical properties were explored by various characterization methods. The results showed that c-PS-MOF exhibited a wide range of pH applications (ASP: 2–10; F – : 3–12) and high salt resistance in the capturing processes of ASP and F – . The unit adsorption capacity of c-PS-MOF was as high as 84.7 mg·g –1 for ASP as pH = 3 and 11.2 mg·g –1 for F – under pH = 6 at 303 K from Langmuir model, respectively. When the solid–liquid ratio was 2 g·L –1 , the content of ASP ( C 0  = 100 mg·L –1 ) and F – ( C 0  = 20 mg·L –1 ) in solution can be reduced to 0.48 mg·L –1 and 1.05 mg·L –1 separately. The recycling of c-PS-MOF can be realized with 5 mmol·L –1 NaOH as eluent. Analysis of simulated water samples showed that c-PS-MOF could be used to remove ASP and F – from actual water. The c-PS-MOF is promising to bind ASP and F – from rivers, lakes, etc. Graphical Abstract