Rohazita Bahari
Thumbnail Image
Preferred name
Rohazita Bahari
Official Name
Rohazita, Bahari
Alternative Name
Bahari, Rohazita
Bahari, R.
Main Affiliation
Scopus Author ID
38460957600
Researcher ID
EKD-5930-2022

Research Output

Filters

2
2
Reset filters

Settings
Now showing 1 - 2 of 2
  • Publication
    Physicochemical and antibacterial activity of soap enriched with Harumanis pruned leaves extract
    (IOP Publishing, 2020)
    Rohazita Bahari
    ;
    Khairul Farihan Kasim
    ;
    Nurul Nadiah Shahrir
    The aim of this study was to formulate antibacterial soap from Harumanis pruned leaves extract. The antibacterial properties of Harumanis leaves extract were tested using disc diffusion test against five bacteria i.e. Bacillus subtilis, Escherichia coli, Pseudomonas putida, Bacillus megaterium and Bacillus licheniformis. Methanol, ethanol and distilled water were used to extract the Harumanis pruned leaves. Ethanol is the best solvent to extract antimicrobial properties in Harumanis pruned leaves as it shows the largest inhibition zone, whereas, water is the weakest solvent to extract antimicrobial properties in Harumanis pruned as it shows minimum inhibition zone for all the microbes used. The best extract of Harumanis pruned leaves (i.e. ethanol extract) was used in the formulation of the antibacterial soap. The result shows that formulated soap with Harumanis pruned extract have the ability to inhibit all the five microbes tested and therefore, it has the potential to be commercialized as antibacterial soap in the near future.
  • Publication
    Chemically modified sugarcane bagasse as a potentially low-cost biosorbent for dye removal
    ( 2010)
    Saiful Azhar Saad
    ;
    Khairuddin Md Isa
    ;
    Rohazita Bahari
    The use of adsorbent prepared from sugarcane bagasse, an agro waste from sugar industries has been studied as an alternative substitute for activated carbon for the removal of dyes from wastewater. Adsorbents prepared from sugarcane bagasse were successfully used to remove the methyl red (MR) from an aqueous solution in a batch reactor. This study investigates the potential use of sugarcane bagasse, pretreated with phosphoric acid (SBC), for the removal of methyl red from simulated wastewater. Phosphoric acid treated sugarcane bagasse was used to adsorb methyl red at varying dye concentration, adsorbent dosage, pH and contact time. A similar experiment was conducted with commercially available powdered activated carbon (PAC) and untreated sugarcane bagasse (SB) in order to evaluate the performance of SBC. The adsorption efficiency of different adsorbents was in the order PAC > SBC > SB. The initial pH 3 to 6 favoured the adsorption of synthetic dyes by both SBC and SB. This prepared adsorbent was very efficient in decolorized diluted solution. It is proposed that SBC, in a batch or stirred tank reactors could be employed as a low-cost alternative in wastewater treatment for dyes removal.
      13  13