@article { ISI:000310257100019,
	title = {Alumina supported carbon composite material with exceptionally high defluoridation property from eggshell waste},
	journal = {Journal of Hazardous Materials},
	volume = {237},
	year = {2012},
	month = {OCT},
	pages = {161-169},
	publisher = {ELSEVIER SCIENCE BV},
	address = {PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS},
	abstract = {<p>A new alumina supported carbon composite material called {\textquoteleft}{\textquoteleft}Eggshell Composite{\textquoteright}{\textquoteright} (EC) was synthesized from eggshell waste as calcium source for selective fluoride adsorption from water. The effect of various synthesis parameters like eggshell (ES): Eggshell membrane (ESM) ratio, aluminium loading, mixing time and calcinations temperature to optimize the synthesis conditions for selective fluoride removal has been studied. It was observed that the synthesis parameters have significant influence on development of EC and in turn on fluoride removal capacity. EC synthesized was characterized for elemental composition, morphology, functionality and textural properties. Results showed that EC obtained from eggshell modified with alumina precursor is more selective and efficient for fluoride removal. Langmuir and Freundlich isotherm were used to obtain ultimate fluoride removal capacity. The calcium and alumina species in EC shows synergistic effect in fluoride adsorption process. Fluoride sorption studies were carried out in synthetic, groundwater and wastewater. EC proved to be a potential, indigenous and economic adsorbent for fluoride removal. (C) 2012 Elsevier B.V. All rights reserved.</p>},
	keywords = {Composite material, Eggshell, Eggshell membrane, Fluoride adsorption, Langmuir},
	issn = {0304-3894},
	doi = {10.1016/j.jhazmat.2012.08.023},
	author = {Lunge, Sneha and Thakre, Dilip and Kamble, Sanjay and Labhsetwar, Nitin K. and Rayalu, Sadhana}
}
@article {49063,
	title = {Synthetic layered double hydroxide on biodegradable support: an efficient adsorbent for defluoridation of water},
	journal = {Indian Journal of Chemical Technology },
	volume = {31},
	year = {2024},
	month = {JAN},
	pages = {152-161},
	type = {Article},
	abstract = {<p>
	Fluoride concentrations in drinking water above permissible levels and incidences of fluorosis among people have been reported from many parts of the world including India. Low-cost and biodegradable adsorbents are the preferred choice for the removal of fluoride from an aqueous medium. In the present study, zinc-aluminium layered double hydroxide (LDH) supported on sugarcane bagasse (raw and acid-treated) has been synthesized, characterized, and investigated for the defluoridation of water. The SEM micrographs of the supported adsorbents show good dispersion of the LDH particles on the support material. The defluoridation capacity of the LDH is enhanced by supporting it on bagasse. The adsorption capacity of supported adsorbents increased by 3-fold than the unsupported LDH adsorbent. The adsorption data have been well fitted to the Freundlich isotherm model indicating physical and multi-layer adsorption. The maximum fluoride adsorption capacity has been found to be 8.85 mg/g with 76.3\% fluoride removal when the initial fluoride concentration is 11-12 mg/L. The pseudo-second-order kinetic model has been found suitable to explain the fluoride adsorption kinetics on the supported LDH adsorbents. The present study reveals that the bagasse-supported LDH adsorbent has a high potential for defluoridation of water.</p>
},
	keywords = {adsorption kinetics, Fluoride adsorption, Layered double hydroxide, Sugarcane bagasse},
	issn = {0971-457X},
	doi = {10.56042/ijct.v31i1.7611},
	author = {Mayadevi, S. and Kirandas, M. D. and Manilal, A. M. and Roshini, N. and Mandal, Sujata}
}
