Comparative summary of effects.

Wastewater treatment is essential for protecting water resources and public health. Zeolite-based adsorbents offer an effective and sustainable solution for this purpose, providing high selectivity and regeneration potential. Zeolites are inorganic, highly crystalline, micro-porous materials composed of aluminotecto-silicates (SiO₄ and AlO₄ tetrahedral). Synthetic zeolites are commercially favored over natural ones due to their higher purity, crystallinity, and uniform pore size. Na A. zeolite (NaAZ) is a type of synthetic zeolite widely used in various applications, including wastewater treatment, due to its excellent adsorption and ion-exchange properties. This study focus on synthesize zeolite A from meta-kaolinite using a wet chemical method. The synthesis involves a hydrothermal process in which chemical reagents are mixed in an aqueous medium and heated under controlled conditions. The resulting (NaAZ) was characterized using Brunauer-Emmett-Teller (BET) surface area analysis, Fourier Transform Infrared Spectroscopy (FT-IR), X-ray Diffraction (XRD), Scanning Electron Microscopy (SEM), and Energy Dispersive X-ray Spectroscopy (EDX). This study evaluates the synthesized (NaAZ) for the removal of chemical oxygen demand from synthetic wastewater. Various parameters affecting adsorption such as contact time pH, temperature, and adsorbent dosage were investigated. The optimized conditions were then applied to real wastewater, and the material was further tested for its antitoxic and antibacterial properties. The in vitro antibacterial activity of NaAZ was assessed against both Gram-positive bacteria (Bacillus subtilis ATCC 6633, Staphylococcus aureus ATCC 6538, Enterococcus faecalis ATCC 19433) and Gram-negative bacteria (Escherichia coli ATCC 25922, Enterobacter aerogenes ATCC 13048, Pseudomonas aeruginosa ATCC 15442). Under optimal conditions contact time (40 min), pH (6–7), and adsorbent dosage (0.25 g) the removal efficiencies for COD, TSS, TKN, and PO₄3⁻ were 90.69%, 90.41%, 73.75%, and 68.85%, respectively.

污水处理对于保护水资源与公众健康至关重要。沸石基吸附剂为此提供了一种高效且可持续的解决方案，具备优异的选择性与再生潜力。沸石为无机高结晶度微孔材料，由以SiO₄和AlO₄四面体为结构基元的铝硅酸盐骨架构成。合成沸石因纯度更高、结晶度更佳且孔径均一，在商业应用中优于天然沸石。NaA型沸石（NaAZ）是一类合成沸石，凭借优异的吸附与离子交换性能，被广泛应用于包括污水处理在内的诸多领域。本研究采用湿化学法，以偏高岭土为原料合成A型沸石。该合成工艺包含水热过程：将化学试剂于水介质中混合后，在受控条件下进行加热反应。采用Brunauer-Emmett-Teller（BET）比表面积分析法、傅里叶变换红外光谱（FT-IR）、X射线衍射（XRD）、扫描电子显微镜（SEM）与能量色散X射线光谱（EDX）对所得NaAZ进行了表征。本研究评估了合成所得NaAZ对模拟废水中化学需氧量（COD）的去除效果。研究了接触时间、pH值、温度与吸附剂投加量等影响吸附过程的各类参数。随后将优化后的工艺条件应用于实际废水，并对该材料的抗毒性与抗菌性能开展了进一步测试。本研究针对NaAZ的体外抗菌活性展开了评估，受试菌株涵盖革兰氏阳性菌（枯草芽孢杆菌ATCC 6633、金黄色葡萄球菌ATCC 6538、粪肠球菌ATCC 19433）与革兰氏阴性菌（大肠埃希氏菌ATCC 25922、产气肠杆菌ATCC 13048、铜绿假单胞菌ATCC 15442）。在最优工艺条件下：接触时间40min、pH值6~7、吸附剂投加量0.25g时，NaAZ对化学需氧量（COD）、总悬浮固体（TSS）、总凯氏氮（TKN）与磷酸根（PO₄³⁻）的去除率分别为90.69%、90.41%、73.75%与68.85%。