Abstract：
This research focused on synthesizing an eco-friendly FeZn/GA@Cu nanocomposite using spent coffee grounds and Gum Arabic (GA). The study aimed to investigate its effectiveness as both a photocatalyst and an adsorbent, specifically for removing nitrates from aqueous solutions. The prepared nanocomposite was characterized using various analytical techniques, including XRD, TGA, FESEM with EDS, TEM, BET, FTIR, zeta potential, UV-DRS, and VSM. The RSM method, an impressive removal efficiency of 95.28 % for nitrate was projected under the specific conditions of an optimal dose of 1.82 g/L, an initial concentration of 60.00 mg/L, a pH level of 5.85, and a reaction duration of 48.90 min. It was ascertained that the peak efficiency of 98.25 % could be achieved with a carefully calibrated dose of 1.94 g/L, an initial concentration of 62.69 mg/L, a pH of 5.16, and a reaction time contained within 45.75 min. The synthesized nanocomposites have shown potential antibacterial activity against gram+ve (Staphylococcus aureus) and gram-ve (Escherichia coli) pathogens. This study suggests that the FeZn/GA@Cu nanocomposite synthesized using spent coffee grounds has potential as a photocatalyst for removing nitrate from aqueous solutions.
摘要：
这项研究的重点是使用废咖啡渣和阿拉伯树胶（GA）合成生态友好的FeZn/GA@Cu纳米复合材料。该研究旨在研究其作为光催化剂和吸附剂的有效性，专门用于从水溶液中去除硝酸盐。使用各种分析技术对制备的纳米复合材料进行了表征，包括XRD,TGA,FESEM与EDS，TEM,BET,FTIR,zeta电位,UV-DRS,和VSM。RSM方法,在最佳剂量为1.82g/L的特定条件下，硝酸盐的去除效率预计为95.28%，初始浓度为60.00mg/L，pH值为5.85，反应时间为48.90分钟。可以确定，经过仔细校准的1.94g/L剂量可以达到98.25％的峰值效率。初始浓度为62.69mg/L，pH为5.16,反应时间在45.75分钟内。合成的纳米复合材料已显示出对革兰氏ve（金黄色葡萄球菌）和革兰氏ve（大肠杆菌）病原体的潜在抗菌活性。这项研究表明，使用废咖啡渣合成的FeZn/GA@Cu纳米复合材料具有作为从水溶液中去除硝酸盐的光催化剂的潜力。
