Precious Nickel Recovery from Palm Oil Mill Fuel Ash Waste (NiPOMFAW) Using Acidic Leaching Extraction (ALE)

• Main Authors: Said, N., Ahmad Shahroom, Mohd Shah, Malar V., Sivaguru, Syafiqah , A. Khairuddin, Hajar Athirah, M. Sukri, Aina A., Rahman
• Format: Article
• Language: English; English
• Published: Trans Tech Publications, Switzerland 2016
• Subjects: TP Chemical technology
• Online Access: http://umpir.ump.edu.my/id/eprint/13120/1/Precious%20Nickel%20Recovery%20from%20Palm%20Oil%20Mill%20Fuel%20Ash%20Waste%20%28NiPOMFAW%29%20Using%20Acidic%20Leaching%20Extraction%20%28ALE%29.pdf; http://umpir.ump.edu.my/id/eprint/13120/7/Abstract%20-%20Precious%20Nickel%20Recovery%20from%20Palm%20Oil%20Mill%20Fuel%20Ash%20Waste%20%28NiPOMFAW%29%20Using%20Acidic%20Leaching%20Extraction%20%28ALE%29.pdf; http://umpir.ump.edu.my/id/eprint/13120/; http://www.scientific.net/KEM.705.374
• Institution: Universiti Malaysia Pahang

This paper demonstrates precious recovery of nickel from physical pre-treated raw palm oil mill fuel ash waste (POMFAW). The acidic leaching extraction (ALE) using sulphuric and hydrochloric acids agents were carried out in a bath stirrer flask. Process parameter effects of acid concentration, solution pH and treatment time were investigated in the nickel recuperation. The highest nickel recovery (96.83%) was found by treatment time of 1 h, pH of 2.5 and hydrochloric acid concentration of 2.0 M. At the acids leaching higher than 2 M, the nickel recovery decreased. Results from acids leaching imply that nickel complex can be formed at substantial percentages within the acid concentration higher than 1 M. The hydrochloric acid provides impressive nickel compared sulphuric acid, and the POMFAW can be proposed as a substitute of non-renewable sources derived nickel for a promising material and the used ALE can be considered as a beneficial technique.