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Nanocrystalline CaO as Adsorbent to Remove COD from Paper Mill Effluent

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Abstract:

Porous nanocrystalline CaO has been prepared by the solution combustion process using calcium nitrate as oxidizer and glycine as a fuel. As prepared calcium oxide has been characterized using powder X-Ray Diffraction (XRD), BET surface area, and Scanning Electron Microscopy (SEM). The powder XRD pattern confirms the crystallinity and phase purity of the powder. The particle size of the powder obtained from Scherrer's formula lies in the range of 37–53 nm. The particles are loosely agglomerated and spherical in shape as observed by SEM. The specific surface area of the powder is 18.5 m2/g and the average pore diameter obtained from N2-desorption isotherm is ∼5.2 nm. Batch shaking process was performed using CaO as adsorbent with effluent collected from pulp and paper mill to remove chemical oxygen demand (COD). The COD removal capacity of the CaO is ∼93%.

Keywords: ADSORPTION; COD REMOVAL; COMBUSTION SYNTHESIS; NANOCRYSTALLINE CAO

Document Type: Research Article

DOI: http://dx.doi.org/10.1166/jnn.2007.208

Publication date: March 1, 2007

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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