ABSTRACT

The toxins generated by waste dyes from several industrial sectors in water bodies are hard to evacuate by ordinary water treatment procedures. This study discusses the effect of silver nanoparticles (AgNPs) biosynthesized by Pseudomonas aeruginosa on the degradation of some hazardous dyes such as Bromothymol blue and Fantacell dye. The catalytic properties of the Sodium Alginate/Poly Acrylamide silver nanoparticles, (Na-Alg/Poly-AAm) Ag NPs, were compared to the raw (Na-Alg/Poly-AAm) polymer, of different Acrylamide percentages. The bio-produced AgNPs were of concentration 0.3 mg/100 ml embedded in Na-Alg/Poly-AAm with percentages (50/50, 60/40, 70/30, 80/20, 90/10, and 100%) for polyacrylamide and sodium alginate, respectively. The polymers were polymerized by 3Mega gamma rays. AgNPs were characterized by Dynamic Light Scattering (DLS), Transmission Electron Microscope (TEM) and The X-ray diffraction (XRD) spectroscopy. The study showed that the AgNPs size ranged from 24 to 58 nm.

These polymers embedded by AgNPs are considered an excellent catalyst for the reduction of hazardous dyes. This fact is confirmed by a decrease in dyes absorbance revealed by UV–Vis spectroscopy. The maximum reduction percentage for Fantacell dye was 87%, detected at 45 minutes, and the maximum reduction percentage of Bromothymol blue was 87%, detected at 150 min.

摘要

水体中多个工业部门的废染料产生的毒素很难通过常规水处理程序排出。这项研究讨论了铜绿假单胞菌生物合成的银纳米颗粒（AgNPs）的作用对某些有害染料如溴百里酚蓝和Fantacell染料的降解。将藻酸钠/聚丙烯酰胺银纳米颗粒（Na-Alg / Poly-AAm）Ag NPs的催化性能与不同丙烯酰胺百分比的原料（Na-Alg / Poly-AAm）聚合物进行了比较。生物生产的AgNP浓度为0.3 mg / 100 ml，嵌入Na-Alg / Poly-AAm中，其百分比为（50 / 50、60 / 40、70 / 30、80 / 20、90 / 10和100％）聚丙烯酰胺和海藻酸钠。聚合物通过3Megaγ射线聚合。AgNPs通过动态光散射（DLS），透射电子显微镜（TEM）和X射线衍射（XRD）光谱进行了表征。研究表明，AgNPs的大小范围为24至58 nm。

AgNP嵌入的这些聚合物被认为是减少有害染料的极佳催化剂。UV-Vis光谱法显示的染料吸光度降低证实了这一事实。在45分钟时检测到的Fantacell染料的最大还原百分比为87％，而在150分钟时检测到的溴百里酚蓝的最大还原百分比为87％。