Acta Chemica Malaysia

Journal: Acta Chemica Malaysia (ACMY)
Author: H. M. Solayman, Umi Rabiatul Ramzilah P. Remli, Md. Arif Hossen, Kah Hon Leong, Sim Lan Ching, Noor Yahida Yahya, Azrina Abd Aziz, Minhaj Uddin Monir
ISSN: 2576-6732
e-ISSN: 2576-6724

This is an open access journal distributed under the Creative Commons Attribution License CC BY 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited

DOI: 10.26480/acmy.01.2025.06.16

CQDs are one of the fast growing photocatalyst in the field of nanotechnology due to their excellent chemical, photostability and photoluminescence ability. Recently, CQDs are used as prominence photocatalyst in the field of photocatalytic dye wastewater treatment, bioimaging, bio sensing, bio medicine, photocatalytic hydro production and so on. The purpose of this research is to treat the methyl blue (MB) dye containing wastewater by using CQDs composites derived by water melon rinds (WMR). CQDs, TiO2, and CQDs/TiO2 photocatalysts were prepared by hydrothermal method and characterized by XRD, SEM, EDX, BET, XPS, UV-Vis and Photoluminescence spectra. In the results, it is found that CQDs with 0.1 g/L catalyst loading at 5 mg/L of dye concentration has the highest photocatalytic activity with 73% of MB removal compared to TiO2 (55%) and CQDs/TiO2 (27%) respectively. The photodegradation rate of MB was decreased with the increased of catalyst loading and higher degradation were achieved at the lowest initial dye concentration. Interestingly the degradation efficiency of MB was increased with augmented of pH concentration. So, this study proved that MB dye is reduced by utilizing CQDs photocatalyst in an environmentally friendly way. Finally, it can be summaries that CQDs has the potentiality to enhance photocatalytic performance.

Journal: Acta Chemica Malaysia (ACMY)
Author: Syed Abdurrahim Alsagoff, Ahmed H.A. Dabwan*
ISSN: 2576-6732
e-ISSN: 2576-6724

This is an open access journal distributed under the Creative Commons Attribution License CC BY 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited

DOI: 10.26480/acmy.01.2025.01.05

This study aims to develop and optimize a slurry inorganic coagulant for the treatment of textile industrial wastewater. Moreover to investigates the efficiency and capability of the coagulant, focusing on the influence of key parameters, such as time, concentration, and coagulant dosage, on the coagulation and flocculation process. The initial development of the coagulant encountered challenges, leading to an iterative refinement process. Eventually, an optimized coagulant formulation comprising alum, calcium hydroxide, and fly ash in a ratio of 1:2:1/2 was identified. This coagulant demonstrated remarkable efficacy, achieving a 100% removal of total colour from the wastewater at the dosage of 0.75 g when methylene blue was used. The colour removal efficiency was significantly influenced by the coagulant dosage, as higher doses beyond 1.0 g exhibited decreased removal rates. Additionally, the study investigated the impact of time on the coagulation process, identifying the optimum time for slurry coagulant at the 12th hour. Beyond this time, the coagulant’s efficiency reached equilibrium. Furthermore, the study examined the influence of concentration on the coagulant’s performance, demonstrating that as the concentration of the sample increased, the colour removal efficiency decreased. The results of this study provide valuable insights into the kinetics of the coagulation process and its application in wastewater treatment. The optimized coagulant formulation offers a promising solution for efficient colour removal in textile industrial wastewater. The findings contribute to a deeper understanding of the coagulation process, aiding in the design of effective water treatment protocols.

Journal: Acta Chemica Malaysia (ACMY)
Author: Habib, D. W, Idris F. B, Mustapha A. A. and Abdurrahman B. L
ISSN: 2576-6732
e-ISSN: 2576-6724

This is an open access journal distributed under the Creative Commons Attribution License CC BY 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited

DOI: 10.26480/acmy.02.2024.114.119

The study of physicochemical properties of soil is essential for evaluating nutrient status and other characteristics that regulate plant growth. Soil scientists in Nigeria commonly use wet chemistry and dry combustion methods to determine the organic carbon and sulfur content of soil. However, there is insufficient information on the efficiency and limitations of these methods for academic purposes. A laboratory experiment was conducted in 2019, using 60 topsoil samples from the Sudan savanna and northern Guinea savanna agroecology of Nigeria, to compare the results of wet and dry methods for determining organic carbon and sulfur content. The results showed that the CHNS/O analyzer provided higher accuracy and mean values for organic carbon determination, while wet chemistry revealed higher mean and R2 values for sulfur determination. The use of the CHNS/O analyzer is recommended due to its accuracy and safety. Future studies are needed to further evaluate the relationship between these two methods.