Background: Empty fruit bunch (EFB) is a type of biomass waste product formed during the production process of palm oil. In the present work, EFB was used to prepare a cellulose-graftcopolymer which can be converted into poly(amidoxime)-poly(hydroxamic acid) ligands suitable for the removal of heavy metals from electroplating wastewater.

Methods and Results: Poly(amidoxime)-poly(hydroxamic acid) ligands were synthesized from the poly(acrylonitrile-co-methyl acrylate) grafted palm cellulose and were analyzed via FT-IR and FESEM. The binding capacity (q_e) with the metals ions such as copper (Cu²⁺), iron (Fe³⁺), cobalt (Co²⁺), nickel (Ni²⁺) and lead (Pb²⁺) were 341, 290, 284, 204 and 482 mg g^-1, respectively at pH 6. The pseudo-first-order kinetic model is fitted with the results confirming heavy metal adsorption. The isotherm study was conducted using a linear plot of the Langmuir isotherm where results were significantly different from the experimental value (maximum adsorption, q_e), indicating that adsorption does not occur on a single layer. However, the coefficient of the correlation values obtained using the Freundlich isotherm model was acceptable (R²>0.99), and it was concluded that adsorption was multilayered with some metal ions.

Conclusion: The polymeric ligands synthesized here showed excellent adsorption of heavy metals from electroplating wastewater containing a notable amount of copper and iron metal ions.

背景：空果束（EFB）是在棕榈油生产过程中形成的一种生物质废物。在目前的工作中，EFB用于制备纤维素-接枝共聚物，可以将其转变为适用于从电镀废水中去除重金属的聚（ami胺肟）-聚（异羟肟酸）配体。

方法与结果：由聚丙烯腈-丙烯酸甲酯接枝的棕榈纤维素合成了聚ami胺肟-聚异羟肟酸配体，并通过FT-IR和FESEM进行了分析。与铜（Cu ²⁺），铁（Fe ³⁺），钴（Co ²⁺），镍（Ni ²⁺）和铅（Pb ²⁺）等金属离子的结合容量（q _e）为341，在pH 6时分别为290、284、204和482 mg g ^-1。拟一级动力学模型与结果相吻合，证实了重金属的吸附。使用Langmuir等温线的线性图进行等温线研究，结果与实验值（最大吸附量，q_e），表示在单层上不会发生吸附。然而，使用弗氏等温线模型获得的相关值的系数是可以接受的（R ² > 0.99），并且得出结论，吸附被一些金属离子多层化了。

结论：此处合成的聚合配体对电镀废水中含有大量的铜和铁金属离子具有很好的重金属吸附能力。