According to the reviewer suggestion, the expression of separation factor is mentioned in the revised manuscript. 𝑅𝐿= 1 1+𝑏𝐶𝑖, where “Ci” is the initial concentration of Cr(VI) and “b” is the Langmuir constant.
The authors did not indicate how the “separation factor ‘RL’ is calculated and did not give a link to the equation for its calculation, and if the readers are not quite in the subject, then what kind of factor they do not understand.