Title of article :
Removal of cadmium from aqueous solution using nano Prosopis cineraria leaf ash (NPCLA)
Author/Authors :
Pourjaafar ، Milad Department of Chemical Engineering- HSE, HSE Manager Department - Abadan Institute of Technology , Askari ، Ali Department of Occupational Health - School of Public Health - Tehran University of Medical Sciences , Salehi Sahl Abadi ، Ali Corresponding author: Department of Occupational Health and Safety Engineering - School of Public Health and Safety - Shahid Beheshti University of Medical Sciences , Anvaripour ، Bagher Department of Chemical Engineering- HSE, HSE Manager Department - Abadan Institute of Technology , Nemati ، Afshar OICO Azar Oilfield Development Site Manager, Azar Oilfield Project , Rahimi ، Ali Department of Chemical Engineering- HSE - Abadan Institute of Technology , Pourjafar ، Mona Department of Chemical Engineering- HSE, HSE Manager Department - Abadan Institute of Technology
From page :
225
To page :
233
Abstract :
Background: Heavy metal pollution has become one of the most severe environmental problems, therefore, the present study was conducted to investigate removal of cadmium (Cd) from aqueous solution. Methods: In the present study, nano Prosopis cineraria leaf ash (NPCLA) was used as an adsorbent for removing Cd from aqueous solution. Contact time, initial pH of the solutions, sorbent dosages, and initial Cd (II) concentration were considered as parameters affecting Cd removal efficiency. The experiments were designed by Design of Expert (DOE) software. Results: It was revealed that an NPCLA dosage of 2.45 gL-1, pH of 6.3, and initial Cd (II) concentration of 20.7 mgL-1 in contact time of 60 min was the optimum condition for removal of Cd (II) in the domain of experiments and at this optimum condition, the prediction value of removal efficiency was found 99.9%. Based on the results of kinetics experiments, the sorption system and experiment data of Cd (II) adsorption on the NPCLA followed the pseudo-second-order kinetic model. Freundlich, Langmuir, Brunauer-Emmett-Teller (BET), and Temkin isotherm models were investigated. The equilibrium adsorption data were fitted well with linearly transformed Langmuir isotherm with a correlation coefficient of R2 = 0.9877, and the maximum sorption capacity of NPCLA was obtained to be 25.25 mgg-1. Conclusion: In laboratory conditions, NPCLA can remove Cd from aqueous solution with a high efficiency. Therefore, due to this plant’s availability and cheapness, NPCLA can be considered a suitable option for producing adsorbents on industrial scales.
Keywords :
Cadmium , Hydrogen , ion concentration , Nanostructure , Plant leaves , Kinetics
Journal title :
Environmental Health Engineering and Management Journal
Journal title :
Environmental Health Engineering and Management Journal
Record number :
2739976
Link To Document :
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