Environmental Engineering Reference
In-Depth Information
37
Engineered Nanomaterials for Landill
Leachate Treatment in the Humid Tropics:
The Sri La
nkan Perspective
Meththika Vithanage,
1
S.S.R.M.D.H.R. Wijesekara,
1
I.P.L. Jayarathna,
1
Anuradha Prakash,
2
Seema Sharma,
2
and Ashok Kumar Ghosh
2
1
Chemical and Environmental Systems Modeling Research Group,
Institute of Fundamental Studies, Kandy, Sri Lanka
2
Department of Environmental and Water Management, Anugrah Narayan College, Patna, India
CONTENTS
37.1 Introduction ........................................................................................................................ 760
37.1.1 Municipal Solid Waste Dumping ........................................................................ 760
37.1.2 Characteristics of Landill Leachate .................................................................... 760
37.1.3 Common Treatment Practices for Landill Leachate ........................................ 761
37.1.4 Nanomaterials in Leachate Treatment ................................................................ 762
37.2 Materials and Methods ..................................................................................................... 763
37.2.1 Synthesis of Nanoparticles ................................................................................... 763
37.2.1.1 Synthesizing NZVI ................................................................................. 763
37.2.1.2 Synthesis of Iron Oxide Nanoparticles ................................................ 764
37.2.1.3 Synthesis of Gibbsite Nanoparticles ..................................................... 764
37.2.1.4 Synthesis of Ag Nanoparticles from Bacteria ..................................... 764
37.2.2 Chemical Characteristics of Landill Leachate .................................................. 765
37.2.2.1 Treatment of Landill Leachate ............................................................. 766
37.2.2.2 Synthetic Leachate for Metal Treatment .............................................. 766
37.3 Results and Discussion ..................................................................................................... 766
37.3.1 Physiochemical Characteristics of Leachate ...................................................... 766
37.3.2 Characterization of Nanoparticles ...................................................................... 767
37.3.2.1 Starch-Coated NZVI ............................................................................... 767
37.3.2.2 Iron Oxide Nanoparticles ...................................................................... 767
37.3.2.3 Nanogibbsite ............................................................................................ 768
37.3.2.4 Silver Nanoparticles................................................................................ 769
37.3.3 Nutrient Treatment Using Different Nanoparticles.......................................... 770
37.3.4 Phosphate
PO
3
( )
Removal by Nanomaterials .................................................. 771
37.3.5 BOD Removal by Nanomaterials......................................................................... 771
37.3.6 Metal Ion Removal in Synthetic Leachate .......................................................... 772
37.3.7 Adsorption Isotherm Studies ............................................................................... 773
37.4 Conclusions ......................................................................................................................... 774
References ..................................................................................................................................... 774
759
