Liyana Ahmad Sofri
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Preferred name
Liyana Ahmad Sofri
Official Name
Liyana, Ahmad Sofri
Alternative Name
Sofri, L. A.
Ahmad Sofri, Liyana
Main Affiliation
Scopus Author ID
56353120600
Researcher ID
M-4720-2019

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Exploring the potential of agricultural waste as natural resource-based adsorbents for methylene blue removal

2024-01-01 , Nur Liza Rahim , Muhamad Farid Idham Sulaiman , Ain Nihla Kamarudzaman , Norlia Mohamad Ibrahim , Roshazita Che Amat , Syakirahafiza Mohammed , Norazian Mohamed Noor , Deák G. , Liyana Ahmad Sofri

Excessive agricultural waste in the agricultural industry leads to various forms of pollution, including water pollution. To address this issue, there's a growing interest in finding alternative methods. One approach is to utilize agricultural waste as natural resource-based adsorbents to eliminate contaminants, such as the case of methylene blue (MB) in this study. The study specifically focuses on using rice husk (RH) from a local rice mill in Perlis, Malaysia, to absorb methylene blue. The structure of rice husk, characterized by scanning electron microscopy (SEM), reveals a coarser and more compact outer area, contributing to its absorption capacity for methylene blue. The study on rice husk involves three main aspects: contact time, adsorbent dosage, and dye concentration. The removal percentage of MB increased as the three studied adsorption parameters increased. The adsorption data were analyzed using Langmuir and Freundlich adsorption isotherms, with the the Freundlich Isotherms were found to be more suitable based on higher coefficient of correlation (R2) values compared to Langmuir. The pseudo-second-order kinetics model demonstrated a higher R2value (1.00) compared to the pseudo-first-order model (0.747). The results indicate promising potential for addressing pollution through sustainable means and provide insights into the adsorption process under varying conditions.

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Arthropods-mediated Green Synthesis of Zinc Oxide Nanoparticles using Cellar Spider Extract: A Biocompatible Remediation for Environmental Approach

2024-06-12 , Muzamir Isa , Muhammad Nur Aiman Uda , Irfan M.A.R. , Uda Hashim , Subash Chandra Bose Gopinath , Hafiza Shukor , Afnan Uda M.N. , Huzaifah M.R.M. , Ali M.M. , Ibrahim N.H. , Makhtar M.M.Z. , Ng Q.H. , Mohd Khairul Rabani Hashim , Zainal Abidin Arsat , Nor Azizah Parmin , Liyana Ahmad Sofri , Ruslan M.A.M. , Tijjani Adam

This study presents an eco-friendly approach to synthesizing zinc oxide nanoparticles (ZnO NPs) using extracts from cellar spiders, addressing environmental and health concerns associated with conventional methods. The spider extract efficiently reduced zinc acetate dihydrate, and the synthesized ZnO NPs underwent comprehensive quantitative characterization, including size, shape, morphology, surface chemistry, thermal stability, and optical properties using Fourier-transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), zeta potential measurements, thermogravimetric analysis (TGA), and UV-vis spectroscopy. The nanoparticles exhibited intended characteristics, and their adsorption capability for methylene blue (MB) was quantitatively assessed using the Freundlich isotherm model and pseudo-second-order kinetic model, providing numerical insights into MB removal efficiency. The study demonstrates the potential of these green-synthesized ZnO NPs for applications in environmental remediation, wastewater treatment, and antibacterial therapies, contributing to both sustainable nanomaterial development and quantitative understanding of their functional properties.

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The Influence of Cement Content to Properties of High Strength Anti Washout Concrete (HSAWC)

2024-04-19 , Khairunnisa Muhamad , Muhammad Haikal Farizad , Zarina Yahya , Liyana Ahmad Sofri

The high strength of concrete required a lot of cement content to increase its strength but not for the anti washout concrete (AWC) or underwater concrete (UWC). AWC will face another problem which is higher cement content could make the segregation to occur. This segregation process will give bad impact to the strength of the AWC. This research studied on four different cement content to examine: 450 kg/m3, 500 kg/m3, 550 kg/m3 and 600 kg/m3 towards its fresh and hardened properties of concrete. Superplasticizer is used as water reducing agent in the mix proportions to achieve high strength and self-consolidated concrete. Apart from that, there are two types of concrete samples produced, the air sampling concrete and underwater sampling concrete which have the same mix proportion. The overall results show a good correlation between the cement content in the mix and the strength of the air sampling concrete achieved. However, anti washout concrete having issues which is segregation. This segregation had affected the strength of the concrete. In conclusion, Anti washout concrete shows that optimal cement content without any viscocity modifying agent (VMA) is at 550 kg/m3

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