32 research outputs found
Significant effect of concentration ratio in synthesizing titania nanoflowers (TNF) powder for various application as additive
No full textThe effect of flower-like tatania towards characteristics and performance of polysulfone mixed matrix membrane
No full textFor ages, the polymeric membrane such as PSf is widely used in liquid separation for various application as the polymer itself offer versatile and attractive properties. However, due to strong hydrophobic nature of PSf property that create serious fouling problem to most of the separation process, thus modification of membrane by integrating strong hydrophilic particles is always practically used among industries and researchers. In this research, the effect of FLT as an additive in the PSf membrane was investigated. With consideration of the FLT that offer larger specific surface area as compared to ST that able to generate better performances and properties of polymer MMM. In this work, the polymer MMM of PSf/FLT and PSf/ST membranes were prepared via phase inversion method at five different concentrations of additive. Membrane characterization involved several observations such as cross-section area, particle distribution, surface roughness, hydrophilicity property, mean pore size, mechanical strength and porosity. Meanwhile, membrane performances were evaluated in terms of HA rejection, PWF, antifouling, antibacterial activity and photocatalytic properties based on self-cleaning antifouling efficiency. From the result, the addition of FLT was strongly influenced overall structure and characteristics of the membrane compared to ST. With a larger surface area of FLT and homogenous distribution inside membrane structure have resulted in better hydrophilicity effect thus improved the membrane performances. The PWF result was increased from 61.33 L/m2h to 137.81 L/m2h for PSf/ST and 155.46 L/m2h for PSf/FLT as increased additive to 3 wt%. Same results were obtained by rejection analysis where the PSf/FLT membrane able to reject more than 96% of HA and improved antifouling and self-cleaning efficiency. It is clearly shown that the present of higher specific surface area of FLT has improved overall characteristics and performances of the membrane compared to ST especially at 3 wt% of concentration
Living Donor Liver Transplantation for Adult Hepatic Undifferentiated Embryonal Sarcoma: A Case Report
No full textIntroduction: Undifferentiated embryonal sarcoma of the liver (UESL) is an aggressive tumor. There is no established treatment, and it is an uncommon tumor in adults. Treatment usually includes a combination of surgery, chemotherapy, and occasionally liver transplantation. The role of liver transplantation in patients with irresectable UESL merits exploration. Case Description: A 20-year-old boy with a large palpable abdominal mass, shortness of breath, and weight loss presented to our clinic. His CT showed a large cystic lesion measuring 11.5 x 22.7 x 23 cm, predominantly involving the left lobe and right anterior sector, with a biopsy consistent with UESL. The tumor was closely applied to the right hepatic vein, with bland main portal vein thrombosis. Due to an irresectable tumor and deteriorating clinical condition, living donor liver transplantation was performed. The patient remains in good health at 16 months follow-up. Practical Implication: In carefully selected patients with UESL, when other options are not feasible, liver transplantation might prolong survival and improve quality of life
Comparison between commercial and synthesised nano flower-like rutile TiO2 immobilised on green super adsorbent towards dye wastewater treatment
No full textThe combination of a semiconductor metal oxide with green low-cost adsorbent materials has prompted the emergence of new natural resources having higher efficiency for treating dye wastewater. This study investigated the characterisation and performance of synthesised nano flower-like rutile TiO2 (FeTiO2) via the facile hydrothermal method and sintered commercial TiO2 (CeTiO2). Both CeTiO2 and FeTiO2 were immobilised on green super adsorbent basil seed. The details of the structural properties were analysed by Rietveld refinement and the deconvolution method to verify the purity. The synthesised F eTiO2 immobilised on basil seed (BeFeTiO2) was found to have optimum physical and morphology properties. Kinetic and equilibrium studies illustrated that the adsorption behaviour of BeFeTiO2 could be better described by pseudo-second-order kinetic (chemisorption). The maximum uptake capacity (49.47 mg g 1) with the highest removal of methylene blue (98.95%) was obtained at an equilibrium time of 180 min following photocatalysis and self-cleaning. A large antibacterial ring area (1.83 mm2) was also obtained from BeFeTiO2. The removal of methylene blue dye for BeFeTiO2 increased as the recycle times increased (3 times) due to the increase of the surface area exposed to methylene blue as the weight of BeFeTiO2 immobilised on basil seed decreased. This demonstrates that BeFeTiO2 provides better potential to apply as a multifunction green super adsorbent for dye wastewater treatment compared to B eCeTiO2
Revolution of Malaysia’s Kaolin to Metakaolin towards various application: A mini review
No full textThe transformation of kaolin to metakaolin was studied in various state in Malaysia which is Segamat, Nitar, Lenggor, Ipoh, Bidor, Mersing, Sabah, and Sarawak. In Segamat, the kaolin has a light colour due to the high silicate composition and also contain high mineral such as kaolinite and quartz existed as impurities. Aluminum rich kaolin is bright in color with elevated plasticity and is commonly used in the ceramic, plastic, dye, fabric, pesticide, pharmaceutical and beauty industry. For Nitar and Lenggor, production of metakaolin occurs at 510°C and formation of mullite occur at 900°C. Both clays show good crystallization of pseudohexagonal to hexagonal kaolinite particles. Moreover, the classification of clay and the sizing are the significant characteristic to be determined using the method of the beneficiations. The method of beneficiations is crucially important to increase the quality of clay to meet the requirement for industry application. In Ipoh and Sarawak, the primary deposit is dominated by kaolin and the mixture of granites and diorites produced from weathering. On the other hand, in Bidor, the primary deposit is a mixture of kaolinite, muscovite and smectite also formed by weathering. The increasing amount of illite in secondary kaolin deposits in the Mersing area due to the marine deposition of those deposits where illite formed by the absorption of clay minerals from the seawater by pottasium. Kaolin in Kg Gading, Bongawan Sabah were treated with sodium hexametaphosphate to remove impurities in natural kaolin. The transformation of kaolin to metakaolin was conducted at 800°C for 5 hours
Adsorption of Sodium Ion (Na+) onto Synthesized Zeolite-A from Malaysian Kaolin by Hydrothermal Method: Equilibrium and Kinetic Studies
No full textBatch adsorption of sodium ion (Na+) using Malaysian kaolin-based materials, zeolite A was studied and observed. The experiments were done at different parameters such as varying initial concentrations of sodium ions in seawater solution (70 to 280 mg L–1), pH range of 6 to 8 and various adsorbent dosages (0.1 to 0.4g). The Langmuir and Freundlich's isotherms were used to analyse the data, and the results were compared. This study discovered that the Langmuir isotherm matched the experimental data very well, with the maximum monolayer adsorption capacities derived from the Langmuir equation being 769.3 mg g–1. Using pseudo-first-order, pseudo-second order, and intraparticle diffusion models, the kinetics of the reaction were further investigated and understood. The Intra Particle Diffusion Kinetic Equation was the most accurate description of the adsorption kinetics of sodium ions onto zeolite synthesis
Polymer Mixed Matrix Membrane with Biosynthesized Zinc Oxide/Silver Oxide Additive for Antibacterial Performance
No full textMembrane technology has emerged as one of the most effective approaches for water purification, utilizing pore separation to achieve filtration without the complexities and high energy consumption associated with the traditional methods. Recent advancements have focused on modifying polymeric membranes, particularly polysulfone (PSf), by incorporating inorganic additives such as zinc oxide (ZnO) and silver oxide (AgO) nanoparticles. Thus, in this study, polymer MMMs were fabricated by incorporating biosynthesized ZnO/AgO synthesized from tea leaf extract as a reducing agent with the aim of enhancing membrane characteristics and antibacterial properties. The results showed that the antibacterial properties were enhanced by the addition of additives, particularly at higher concentrations of ZnO along with the presence of AgO. Other characteristics such as morphology, surface roughness, porosity, and hydrophilicity also produced the same increasing trend. These results proved that the addition of additives was able to enhance MMMs capabilities especially in terms of antibacterial properties
Comparative Study Infused Mechanism Among Absorbance Materials to Improve Plant Growth
No full textAgriculture is the practice of cultivating land, growing crops, and raising livestock for human consumption. The purpose of this experiment is to assess how successful zeolite, charcoal, and kaolin are as slow-release fertilizers by investigating the adsorption performance of zeolite as a nutrient-uptake agent using various samples. This paper discussed the three absorbents when infused with the fertilizer towards plant growth potentially for soil quality, conservation of water, and nutrient consumption. Since the infused absorbent shows the best quality in the retention of water and nutrients, it enables it to collect hazardous substances quickly and efficiently from environmental pollution. The mixture of the sample contains 80 grams of soil and 5 grams of infused zeolite, charcoal, and kaolin for planting green beans. Absorption and fertilizer testing were performed to see the physical properties of infused absorbent samples. In conclusion, the ability of zeolite and kaolin to retain nutrients was performed the best while charcoal slightly displayed growth of the plants as shown by the result of the height, length of leaf, pH level, and humidity of the soil
The Extraction of Organic Silica from Agricultural Waste: A Mini Review
No full textInorganic silica precursors, also known as alkoxysilanes, have been used commercially in many applications and synthetizations. However, it has been reported that these inorganic silicas can harm human health, causing stomach, bladder, and kidney failure, as well as death in the case of an acute inhalation. Due to this reason, organic silica from agricultural waste such as coconut husks, corncobs, sugarcane bagasse, rice husks, and bamboo leaves is being reviewed as an alternative source to replace the risky inorganic silica. This work discussed the extraction method, silica percentage obtained, and applications involving the use of organic silica, demonstrating that green waste can replace inorganic silica and provide good value to society. Inorganic silica precursors, also known as alkoxysilanes, have been used commercially in many applications and synthetizations. However, it has been reported that these inorganic silicas can harm human health, causing stomach, bladder, and kidney failure, as well as death in the case of an acute inhalation. Due to this reason, organic silica from agricultural waste such as coconut husks, corncobs, sugarcane bagasse, rice husks, and bamboo leaves is being reviewed as an alternative source to replace the risky inorganic silica. This work discussed the extraction method, silica percentage obtained, and applications involving the use of organic silica, demonstrating that green waste can replace inorganic silica and provide good value to society
Potential of transforming sodalite from synthesis kaolin with a mild condition of the hydrothermal method
No full textThe hydrothermal synthesis method is one of the successful methods for transforming kaolin
into sodalite with various parameters considered. The variation of alkalinity source of 2-3 Molarity of
sodium hydroxide and crystallization time (12-16 hours) was considered an important parameter that
influences the formation of sodalite. It is reported in this research that the process of synthesizing
sodalite to transform into an amorphous stage (Metakaolinization phase) began with beneficiation of
kaolin to remove the impurities and calcination by 6500C for four hours. The synthesis was done through
an aging process (400C, 24 hours), and the crystallization temperature was 1000C. The kaolin was
characterized by XRD, FESEM, FTIR, PSA, TGA, followed with metakaolin by XRD, FESEM, FTIR,
and the end-product by XRD, FESEM, FTIR, and PSA. The crystallinity percentage of sodalite slightly
increased by increasing the molarity and crystallization time, but quartz remains in the end-product
