745 | Page REMOVAL OF CADMIUM IONS FROM INDUSTRIAL EFFLUENT USING BCPW: EQUILIBRIUMAND ISOTHERM STUDIES Ahmad Ashfaq 1 , Anwer Ali 2 ,Pankaj Kumar Tyagi 3 1 Civil Engineering Section, Faculty of Engineering & Technology, A.M.U., Aligarh. 2 Department of Chemistry, D.S. College, Aligarh, Dr. B. R. A. University, Agra (U.P) 3 Leather & Footwear Technology Section, Faculty of Engineering & Technology, A.M.U., Aligarh. ABSTRACT In the present research work, adsorptive capacity of Bone China Pottery Waste (BCPW) for the removal of Cd(II) ions from industrial effluent has been studied. Batch method has been employed to investigate the effects of various adsorption controlling parameters such as contact time (5-180 min), pH (1-8) of solution, metal ions concentration (10-200 mg/L) and adsorbent dose (0.1-1.0 g) on adsorption of Cd(II) ions onto BCPW. The optimum set of conditions for maximum adsorption of Cd(II) ions were found to be initial concentration 50 mg/L, dosage 0.5 g and pH 6.0. The maximum adsorption of Cd(II) ions by BCPW was found to be 52.3 %. The adsorption data was fitted best to the Freundlich model (R 2 = 0.969). Langmuir monolayer adsorption capacity of BCPW for Cd(II) was found to be 3.695 mg/g. These results suggested that BCPW could be employed as efficient adsorbent for the removal of Cd(II) from contaminated water sources. Key words: Adsorption, Bone China Pottery Waste (BCPW), monolayer, Langmuir, Freundlich,etc. I. INTRODUCTION The term heavy metal refers to the metals which are toxic at low quantity and cause risks to human health and the environment. Mining, electroplating, metal processing, textiles and battery manufacturing industries are the main sources of heavy metals [1, 2]. Cadmium is a non-essential and highly toxic element which can accumulate along the food chain resulting in serious ecological imbalance and cause hazards to plants and animals [3]. Therefore, elimination of Cd(II) from wastewater is important to protect public health. Commonly used methods to treat metal contaminated effluent are chemical precipitation, ion-exchange, membrane filtration, coagulation and adsorption. All other conventional methods have proved to be less effective and much expensive [4] than adsorption which is technically simple with sludge free environment and involve low investments in terms of both initial cost and land requirement [5, 6]. In recent years, tea waste [7], red mud [8], saw dust [9], ulmus leaves and their ash [10], roasted china clay [11], mixtures of hydrous ferric oxide, quartz and kaolinite [12] and Turkish kaolinite clay [13] have been employed to remove heavy metals from waste water.In this study, BCPW wasutilized for the removal of Cd(II) ions from industrial effluent.