Author(s): Siti Fairuz Juiani; Mohd Ariffin Abu Hassan; Nor Azazi Zakaria; Nazlina Ya’aini; Noor Sabrina Ahmad Mutamim; Khairul Rahmah Ayub; Siti Fadilla Md Noor
Linked Author(s): Nor Azazi Zakaria, Khairul Rahmah Ayub
Keywords: Nickel; Response surface methodology (RSM); Adsorption; CCD; Atomic adsorption spectrometer (AAS)
Abstract: Due to a rapid development of industries, heavy metals such as nickel, directly and indirectly, discharged into environment especially in developing countries. When nickel is released into the air, stormwater will react and settle into the ground. Highly nickel concentration in soils can damage plant and damage the growth rate of algae and microorganism in aquatic life. Wastewater from industry should be properly treated before discharge to prevent any harm to the environment. This paper investigates the potential of chitosan as an adsorbent in removing nickel from electroless nickel plating industry and to find their best operating condition using Response Surface Methodology. Due to chitosan physical properties, which is high charge density and contains amine and hydroxyl group, gives the advantages to the performances. Effect of pH, contact time and adsorbent dosage were studied. Optimization of nickel removal using two-level full factorial designs 2° with two center points shows that 95.15% of nickel removal at 2.11g/L, pH 5.75 and 81minutes of contact time. Through the experimental work conducted shows that chitosan solution shows a high potential for removal nickel from wastewater containing nickel.
Year: 2018