This study focusses on the effect of chitosan coating with eggshell membranes for the reduction of different organic pollutants. Chickens eggs were collected from the local market and utilized to extract the enrich eggshell membranes (ESM). The chicken eggshell membranes are abundant waste material which is inexpensive and illustrates remarkable physiognomies for many possible applications. Fresh fibers/strips coated by chitosan (CS) were prepared by mixing the eggshell membranes with CS solution (2 wt%/v) in different proportions i.e., 10 %, 30 %, 50 %, 60 %, 70 %, 80 %, and 90 %. These strips were then templated with copper and iron metal nanoparticles by putting them in their metal ions aqueous solution to adsorb the metals ions and were then reduced to zero-valent metal nanoparticles (MNPS) by using NaBH₄ aqueous solution. These prepared materials (MNPS@ESM-CS) were characterized by using XRD, XPS, FE-SEM, and EDS to confirm the successful preparation of MNPs over the surface of ESM coated with CS. Afterwards, these prepared materials were investigated as a catalyst for the reduction of different organic pollutants, such as 4-nitroaniline (4-NA), 4-nitrophenol (4-NP) and methylene blue (MB) dye. The catalytic efficiency of ESM was enhanced 5.7-fold by adding only 20 % CS solution. It was observed that Cu@ESM-CS-80 % took 7 min for reduction of 4-NA, 6 min for 4-NP, and 7 min for MB dye. The reusability of the catalytic strip was also investigated for four cycles and found efficient and can be easily recovered by simply pulling it from the reaction mixture.

这项研究的重点是蛋壳膜壳聚糖涂层对减少各种有机污染物的作用。鸡蛋是从当地市场收集的，并用于提取丰富的蛋壳膜（ESM）。鸡的蛋壳膜是大量的废料，价格低廉，并在许多可能的应用中显示出非凡的生理学。通过将蛋壳膜与CS溶液（2 wt％/ v）以不同比例（即10％，30％，50％，60％，70％，80％，和90％。然后，通过将铜和铁金属纳米颗粒置于其金属离子水溶液中以使其吸附金属离子，从而对它们进行模板化处理，然后使用NaBH ₄将其还原为零价金属纳米颗粒（MNPS）水溶液。通过使用XRD，XPS，FE-SEM和EDS对这些制备的材料（MNPS @ ESM-CS）进行表征，以确认在用CS涂覆的ESM表面成功制备了MNP。之后，研究了这些制备的材料作为还原各种有机污染物的催化剂，例如4-硝基苯胺（4-NA），4-硝基苯酚（4-NP）和亚甲基蓝（MB）染料。通过仅添加20％CS溶液，ESM的催化效率提高了5.7倍。观察到Cu @ ESM-CS-80％用于还原4-NA花费了7分钟，对于4-NP花费了6分钟，并且对于MB染料花费了7分钟。还对催化带的可重复使用性进行了四个循环的研究，发现其效率很高，只需将其从反应混合物中拉出即可轻松回收。