Habib F.,Pakistan Institute of Technology for Minerals |
Alam S.,Pakistan Institute of Technology for Minerals |
Zahra N.,Pakistan Institute of Technology for Minerals |
Irfan M.,Pakistan Institute of Technology for Minerals |
Iqbal W.,Pakistan Institute of Technology for Minerals
Journal of the Chemical Society of Pakistan | Year: 2012
A novel route is reported to prepare Hydroxyapatite powder (HAp) from egg shells. Eggshells were used as calcium precursor containing 94-97 % CaCO 3. HAp was synthesized by reacting calcined egg shell powder with reagent grade phosphoric acid at room temperature by precipitation method followed by sintering at 900°C to get crystalline powder. Calcium and phosphorous were determined by Gravimetric and Spectrophotometric method respectively. The Ca/P molar ratio was found to be 1.63. Phase transformation was studied using powder XRD results showing characteristics diffraction peak for HAp and FTIR spectra show the characteristic peaks for phosphate and hydroxyl groups. Thermal analysis (DSC-TGA) was also carried out to investigate the thermal behavior of hydroxyapatite (HAp) powder.
Zahra N.,Pakistan Institute of Technology for Minerals
Journal of Engineering Science and Technology Review | Year: 2013
Copper is a heavy metal that can harm the human's body through water if present in excessive amount. The presence of metal in drinking water is of special concern because of its persistence and toxicity. Therefore, the elimination of copper from water and waste water is important to protect public health. Different adsorbents are used to remove copper from water. In present review paper, copper contamination, its toxicity and its removal from drinking water using different adsorbents is depicted. © 2011 Kavala Institute of Technology.