Research Artcle Copyright (c) 2018 Journal of Advanced Research in Civil and Environmental Engineering (E ISSN: 2393-8307 I P ISSN: 2394-7020) Journal of Advanced Research in Civil and Environmental Engineering Volume 5, Issue 4 - 2018, Pg. No. 42-46 Peer Reviewed Journal Abstract The main objectve of this study is to trace the heavy metal leached from a hybrid blocks developed in this study. The hybrid blocks produced in this study was in the form of interlocking blocks produced from high volume of palm oil waste. Palm oil clinker (POC), palm oil fuel ash (POFA), palm oil clinker powder (POC), quarry dust (QD) mixed all with cement. Leach ability of the heavy metal like Aluminum, Iron, Manganese, Zinc, Cadmium, Cobalt, Cupper, and Lead were assessed using the De-ionized water leaching procedure (DWLP) the more appropriate for in situ conditon. Traces for heavy metals were analyzed using Inductvely coupled plasma Optcal emission spectrometer (ICP-OES). Results demonstrated that the concentratons of heavy metal leached from the blocks produced in this study were within the acceptable limits according to the Malaysian Standards. It was observed that the leaching of heavy metal was increased with the increase of palm oil clinker and decrease with the increase of quarry dust. It was concluded that the blocks developed in this study was safety for the environment and doesn’t possess any threat to the surroundings. Keywords: Leach ability, Di ionized water leaching procedure, Heavy metal concentraton, Hybrid blocks Corresponding Author: Wan Ibrahim MH, Jamilus Research Center, Faculty of Civil and Environmental Engineering, Universit Tun Hussein Onn Malaysia. E-mail Id: haziman@uthm.edu.my How to cite this artcle: Shakir AA, Wan Ibrahim MH, Othman NH et al. Leaching Behaviour of Hybrid Blocks made using high Volume of Palm Oil Wastes. J Adv Res Civil Envi Engr 2018; 5(4): 42-46. Leaching Behaviour of Hybrid Blocks made using high Volume of Palm Oil Wastes Alaa A. Shakir 1 , Wan Ibrahim M.H. 2 , Othman N.H. 3 , Ali Ahmed Mohammed 4 , Burhanudin M.K. 5 , Ridzuan M.B. 6 , Shahidan S. 7 1,2,3,5,6,7 Jamilus Research Center, Faculty of Civil and Environmental Engineering, Universit Tun Hussein Onn Malaysia. 4 Civil Engineering Department, College of Engineering, University of Technology, Baghdad, Iraq. Introduction Generally, leaching tests are categorized into the following categories: (a) tests designed to simulate toxic elements emit under a special environmental scenario like industrial acid rain leach test or toxicity leaching procedure characteristc (TCLP) (b) sequental chemical extracton tests, (c) investgatons which assess the basics of the leaching parameters [1]. Many researchers have atempted to emulate the real-life scenario and suggested diferent leaching methods substantatng the atempts. Tests that are designed to emulate emissions under specifc environmental scenarios are restricted because they mostly do not supply informaton on the emissions under environmental scenarios varied from the one being emulated [2]. This kind of restricton has led to a vast trial of misuse and misses explanaton of TCLP fndings. Dependence on the emulaton-based investgaton results “pass the test” treatment processes rather than waste characteristcs enhancements or decrease the leaching under a real use or disposal scenarios [3]. Leaching methodologies are predominantly classifed by either the leaching fuid is a statc extracton tests (single additon) or is a dynamic tests (rejuvenated). Several leaching methods can be applied to various forms of waste have been reviewed where it was observed the releasing from solid materials is almost assessed using the out comings of one or more extracton tests intended to measure the leaching from materials [4]. In spite of that more than 50 leaching tests have been specifed for diferent purposes and materials, only a restricted number issue a range of test conditons [5]. Nidhi et. al 2017 [7] had done investgatons on leaching