1. Dept. of Environmental Science and Engineering, Kathmandu Univ., Dhulikhel 45200, Nepal. ORCID: . Email:
2. Dept. of Chemical Science and Engineering, Kathmandu Univ., Dhulikhel 45200, Nepal.
3. Dept. of Environmental Science and Engineering, Kathmandu Univ., Dhulikhel 45200, Nepal. (corresponding author). ORCID: .