1. aDepartment of Chemistry, Akal University, Talwandi Sabo, Bathinda-151302, Punjab, India
2. bWastewater Technology Division, CSIR-National Environmental Engineering Research Institute, Nagpur-440020, Maharashtra, India
3. cAcademy of Scientific and Innovative Research (AcSIR), Ghaziabad-201002, India s_pal@neeri.res.in