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Mishra, S. P.
- Adsorption-Desorption of Heavy Metal Ions
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PDF Views:123
Authors
Affiliations
1 Department of Chemistry, Institute of Technical Education and Research, Siksha ‘O’ Anusandhan University, Bhubaneswar 751 030, IN
1 Department of Chemistry, Institute of Technical Education and Research, Siksha ‘O’ Anusandhan University, Bhubaneswar 751 030, IN
Source
Current Science, Vol 107, No 4 (2014), Pagination: 601-612Abstract
Adsorption and desorption studies on different types of adsorbents, including natural materials such as teak tree bark powder, rice husk, natural bentonite, different algae like Ecklonia maxima, Escherichia coli, Ascophyllum nodasum, Rhizopus nigricans, Cladophora fascicularis, goethite and soils of three nuclear power plant and artificial materials such as Fe oxide-coated sand, goethite pretreated with phosphate, dithizonemodified sodium trititanate whisker, modified nanometre sized TiO2, Chromosorb 102 resins and poly(m-phenylenediamine) are summarized. The kinetics, thermodynamics, sorption/desorption mechanism of different metal ions on different adsorbents under different experimental conditions are discussed. It is found that desorbing agent is greatly dependent on the adsorbate used. All the metal ions are desorbed using acids like HCl, HNO3 and H2SO4 in most of the cases, except Cr(VI). EDTA can be used to remove Pb2+ and Zn2+ in addition to acids. Since Cr(VI) is present in anionic form; it can be eliminated from the loaded adsorbents using bases like NaOH, Na2CO3 or NaHCO3.Keywords
Adsorption, Desorption, Heavy Metals, Eluant.Full Text
- Study of Hybrid Composites using Measurements of Ultrasonic and Some Physical Properties
Abstract Views :188 |
PDF Views:0
Authors
Affiliations
1 Department of Physics, V S S University of Technology, Sambalpur-768018, IN
2 Department of Physics, Christ College, Cuttack-753008, IN
1 Department of Physics, V S S University of Technology, Sambalpur-768018, IN
2 Department of Physics, Christ College, Cuttack-753008, IN
Source
Journal of Pure and Applied Ultrasonics, Vol 41, No 2 (2019), Pagination: 51-54Abstract
The huge deposition of industrial waste and by-product of different agricultural waste in open environment of many regions of India are creating the new environmental problems day by day. The composite materials made from industrial waste or bio-waste has found to be less significant than that of hybrid one. The hybrid composite using coir dust and fly ash particle reinforcement were prepared with proper treatment of blended chemicals by ultrasonic technique. The optimized value of blended chemicals proves its importance in synthesis of better hybrid composite rather than that of unknown proportions of chemicals. The different physico acoustic properties like dielectric constant and sound absorption of synthesized composites has been measured. The results of dielectric measurement and sound absorption property of this material ensures the importance of hybrid composite rather than single composite. The resulting composite property shows that the injection of coir dust and fly ash into it helps in the interface bonding and distribution of absorbed moisture in the material producing a change in dielectric behavior.Keywords
Coconut Coir Powder, Fly Ash, Ultrasonic Velocity, Acoustic Parameters, Sound Absorbing Material, Dielectric Constant.Full Text
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