Materials Science Forum Vol. 1132

Abstract: Decorated Fe₂WO₆ onto SrTiO₃ nanocubes (Fe₂WO₆/SrTiO₃) composites were fabricated by a two-step hydrothermal technique. Some spectroscopic techniques were adopted to delve the catalyst samples. The composite manifested a prominent antibacterial effect toward Escherichia Coli and Bacillus cereus bacteria. Importantly, the as-fabricated composite was testified to exhibit good photodegradation of chlortetracycline hydrochloride under visible light. The eminent performance of the composite was ascribed to not only the excellent absorption of visible light, but also due to the synergistic effect of S-scheme heterojunction which endowed for the high yield of the active species for the pollutant and microorganism destruction. Our study implied that Fe₂WO₆/SrTiO₃ composites can be a potential bifunctional option for remediating microbial-polluted water.

Abstract: The research explored the preparation of natural rubber latex foam (NRLF)/activated carbon for the removal of Lead (II) ion (Pb²⁺). The study investigated the influence of activated carbon (AC) content, ranging from 0 to 10 part per hundred of rubber (phr) while maintaining a fixed size of 80 mesh. The variation in AC content was observed to impact crosslink density and mechanical properties, with an increase in crosslink density compared to neat NRLF. Additionally, the study found a direct effect of AC content on morphology and Pb²⁺ adsorption. The highest Pb²⁺ adsorption efficiency, reaching 1.28 mg/g, was achieved with an AC content of 5 phr. This research contributed to the understanding of the interplay between AC content, material properties, and Pb²⁺ removal efficiency in the development of an innovative Pb²⁺ removal system using NRLF and coconut shell-based activated carbon on flexible substrates.

Abstract: This study presents a novel wastewater treatment method that combines Photosynthetic Bacteria (PSB), chicken egg nutrients, and a fibre-optic light-guided system in a partially transparent tank. The mixture of water, wastewater, and PSB was created and left to develop for 72 hours. The dissolved oxygen levels were recorded in real-time, and it was found that an excess of dissolved oxygen is necessary for efficient wastewater treatment. The optimal light intensity was determined using optical filters, with a 34% VLT filter being used to achieve the ideal light intensity. The temperature changes in the tanks were closely linked to the amount of light received, with direct sunlight causing the highest temperature increase. The research also highlighted the competitive ability of algae to absorb light, resulting in a significant decrease in relative dissolved oxygen levels when exposed to direct sunlight. The study also highlighted the potential of LED light as an additional or substitute light source, improving the system's adaptability to different environmental conditions. Future research will focus on integrating LED light, light condensers, and natural sunlight to optimize wastewater treatment effectiveness, especially in environments with limited illumination.

Abstract: This paper delves into the understanding of how dielectric barrier discharge (DBD) non-thermal plasma (NTP) system affects the flue gas compositions and the synergistic effects of DBD-NTP and SCR systems using NTP-downstream-SCR configuration on nitric oxide reduction through the experimental investigation. Simple gas feeds were used to observe the interaction between gases when high voltage discharge was applied. Overall, DBD-NTP was effective in oxidising NO and NH₃ into NO₂ while also reducing NO in the presence of NH₃. When DBD-NTP was installed downstream the SCR catalyst, it demonstrated substantial additional deNOx and reduction of NH₃ slippage. This proposed SCR+DBD-NTP configuration showed a potential to help mitigate low deNOx performance at low temperatures.