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All Journal ASEAN Journal of Chemical Engineering
Norashikin Ahmad Kamal
Department of Civil Engineering, Universiti Teknologi MARA (UiTM) Shah Alam, Selangor, 40450, Malaysia
Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry

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Journal : ASEAN Journal of Chemical Engineering

 1 
Effect of pH on Adsorption of Cu2+ by Using Composite of Polyvinyl alcohol (PVA)/Kaolin Nur Afiqah Aina Hassim; Khee Chung Hui; Dita Floresyona; Norashikin Ahmad Kamal; Nonni Soraya Sambudi
ASEAN Journal of Chemical Engineering Vol 22, No 1 (2022)
Publisher : Department of Chemical Engineering, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ajche.71028

Abstract

The existence of copper ions in the aquatic environment at a high level can cause negative repercussions for living organisms due to the toxic effect of bioaccumulation in the food chain. Hence, a profound effort is imperative to remove them from water effectively. Among feasible alternatives, a composite film made of PVA and kaolin is reviewed for copper removal via an adsorption mechanism. In this paper, the removal of copper ions from aqueous solution using PVA/Kaolin composite film has been studied with initial copper ions concentration within the range of 50 and 100 ppm and pH of the aqueous solution being controlled at 4, 7, and 9. The loading of 3 wt% kaolin in PVA shows the best adsorption performance in removing 99.14% of 50 ppm copper with an equilibrium adsorption capacity of 5.379 mg g-1 at pH 7. The composite can maintain the adsorption performance for the removal of 100 ppm copper solution at 96.26%.
The Effect of Amino-functionalization on Photoluminescence Properties of Sugarcane Bagasse-derived Carbon Quantum Dots Muhammad Wahyu Nugraha; Nonni Soraya Sambudi; Laksmi Dewi Kasmiarno; Norashikin Ahmad Kamal
ASEAN Journal of Chemical Engineering Vol 21, No 1 (2021)
Publisher : Department of Chemical Engineering, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ajche.61234

Abstract

In the present study, amino-functionalized carbon quantum dots (N-CQDs) were prepared from sugarcane bagasse using a simple one-pot hydrothermal method. Both ethylenedinitrilotetraacetic (EDTA) & ethylenediamine (EDA) were used as carbon and amino sources, respectively. The emerging utilization of natural carbon precursors is critically essential considering its low cost, eco-friendly, and unexploited by-products (e.g., sugarcane bagasse), which may have sustainable economic and strategic benefits. The as-prepared N-CQDs were characterized using High-Resolution Transmission Electron Microscope (HRTEM), Fourier Transform Infrared Spectroscopy (FTIR), UV-vis absorption spectroscopy, and photoluminescence spectroscopy. The influences of amine groups were investigated. The as-prepared N-CQDs photoluminescence intensity increased and quenched significantly with EDTA and EDA amino-functionalization, respectively, with the highest quantum yield at 21.21%, 2.4 times higher than non-functionalized CQDs. Furthermore, the amino-functional groups can alter the CQDs structure and particle size ranging from 4.197±1.058 nm to 9.704±1.428 nm. Hence, the N-CQDs produced exhibit highly tunable photoluminescence and particle size potentially applicable in diverse applications.
Co-Authors Dita Floresyona Khee Chung Hui Laksmi Dewi Kasmiarno Muhammad Wahyu Nugraha Nonni Soraya Sambudi Nonni Soraya Sambudi Nur Afiqah Aina Hassim