Removal of cadmium from aqueous solution using nano <i>Prosopis cineraria</i> leaf ash (NPCLA)

Background: Heavy metal pollution has become one of the most severe environmental problems, therefore, present study was conducted to investigate removal cadmium (Cd) from aqueous solution. Methods: In study, nano Prosopis cineraria leaf ash (NPCLA) used as an adsorbent for removing Cd Contact time, initial pH solutions, sorbent dosages, and (II) concentration were considered parameters affecting efficiency. The experiments designed by Design Expert (DOE) software. Results: It revealed that NPCLA dosage 2.45 gL-1, 6.3, 20.7 mgL-1 in contact time 60 min optimum condition domain at this condition, prediction value efficiency found 99.9%. Based on results kinetics experiments, sorption system experiment data adsorption followed pseudo-second-order kinetic model. Freundlich, Langmuir, Brunauer-Emmett-Teller (BET), Temkin isotherm models investigated. equilibrium fitted well with linearly transformed Langmuir a correlation coefficient R2=0.9877, maximum capacity obtained be 25.25 mgg-1. Conclusion: laboratory conditions, can remove solution high Therefore, due plant’s availability cheapness, suitable option producing adsorbents industrial scales.