Journal of Advanced Mechanical Sciences (JAMS) ISSN: 2583-3790 (Online) "J. Adv. Mech. Sci., vol. 1, no. 3, pp. 93-101, September 2022" www.jamsjournal.com 93 Investigation to Evaluate the Absorption Capacity of HApDuring Removal of Copper (II) from Aqueous Solution Ankit Asthana a *, Abhay Kumar Mishra a Resarch scholar, M.Tech Department of Mechanical Engineering, Goel Institute of Technology and Management, Lucknow, Uttar Pradesh, India. b Assistant Professor, Department of Mechanical Engineering, Goel Institute of Technology and Management, Lucknow, Uttar Pradesh, India *Corresponding Author Email and Phone Number: abhay.k.mishra@goel.edu.in , +919792132889 Article received: 29/08/2022, Article Revised: 06/09/2022, Article Accepted: 08/09/2022 Doi: 10.5281/zenodo.7059339 © 2022 The Authors. This is an open access article distributed under the Creative Commons Attribution License 4.0 (CC-BY), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. Abstract Present work illustrates the removal of copper ion (i.e. Cu2+) from water using hydroxyapatite (HAp) adsorbent. HAp powder was synthesized by chemical precipitation method. The developed HAp powders were characterized through FESEM images alongside the EDX analysis confirming the presence of calcium and phosphorous elements. Batch adsorption experiments were conducted mainly using HAP. The copper (II) ion adsorbed HAp was also characterized using, FESEM and EDX analysis. On the basis of the adsorption experimental results a treatment unit/set up has been developed for the purpose of removal of copper from water. The adsorption candle was made by mixing HAP and activated charcoal in a certain proportion. Activated charcoal was used mainly to increase the flow rate of water through the adsorbent candle. Prototypes were developed to investigate the initial copper ion concentration of 3mg/L and 6mg/L. The prototypes thus developed have proven to be successful as more than 1000 litres of copper contaminated water has been treated whilst maintaining the effluent copper concentration well below the permissible limit. Keywords: Hydroxyapatite (HAp), Adsorption, Copper, Fish scale. 1. INTRODUCTION The rapid rise in industrial development, increase in commerce, development of hospitals and health-care facilities has led to a significant increase in waste products. A large amount of toxic chemicals are also being generated which are highly hazardous in nature. The heavy metals are the most hazardous waste in liquid waste. The elements that have the specific gravity more than 5.0 alongside the atomic weights lie in the range of 63.5 and 200 are termed as heavy metals [1]. In the categories of heavy metal Cu, Pb, As, Fe, Zn, Hg, Ni, Cr and Cd are generally found in water and are highly toxic in nature. These heavy metals are of grave concern as these are toxic, have the affinity of bio-accumulation and are highly recalcitrant in the nature, consequences in the severe health related problems.