In this work, we improved the adsorption capacity of Opuntia ficus-indica fruit peels (OFIFP) by graft-copolymerization using gamma radiation. Acrylic acid (AA) and 4-vinylpyridine (4VP) were grafted onto OFIFP to yield the adsorbents OFIFP-g-polyAA, OFIFP-g-(polyAA-co-4VP), and OFIFP-g-poly(4VP-co-AA). The viability of employing these adsorbents in the removal of textile dyes was analysed constructing adsorption isotherms for methylene blue, malachite green, methyl orange, and carminic acid. The adsorption of cationic fit Langmuir's model well, but Freundlich's model better described the adsorption of anionic dyes. Graft-copolymerization improved the adsorption capacity of OFIFW for cationic dyes by 25%. Furthermore, the removal percentage for disperse orange dye within wastewater increased by 400% using OFIFP-g-(polyAA-co-4VP). Then, graft-polymerization using gamma radiation is a suitable tool to improve the adsorption capacity of lignocellulosic adsorbents.

在这项工作中，我们通过使用伽马辐射的接枝共聚提高了仙人掌果皮 (OFIFP) 的吸附能力。丙烯酸 (AA) 和 4-乙烯基吡啶 (4VP) 接枝到 OFIFP 上以产生吸附剂 OFIFP-g-polyAA、OIFFP-g-(polyAA-co-4VP) 和 OFIFP-g-poly(4VP-co-AA) ）。分析了使用这些吸附剂去除纺织染料的可行性，构建了亚甲基蓝、孔雀石绿、甲基橙和胭脂红酸的吸附等温线。阳离子的吸附符合朗缪尔的模型，但 Freundlich 的模型更好地描述了阴离子染料的吸附。接枝共聚将 OFIFW 对阳离子染料的吸附能力提高了 25%。此外，使用 OFIFP-g-(polyAA-co-4VP)，废水中分散橙色染料的去除率提高了 400%。然后，