Faculty of Science and Natural Resources, Universiti Malaysia Sabah, 88400, Kota Kinabalu, Sabah, Malaysia.
Department of Chemical Sciences, Bernal Institute, University of Limerick, Limerick, Ireland.
Environ Sci Pollut Res Int. 2020 Sep;27(27):34541-34556. doi: 10.1007/s11356-020-09462-0. Epub 2020 Jun 17.
A waste material known as palm oil empty fruit bunch (EFB) is used as a source of cellulose for the development of polymeric materials for the removal of metal ions from industrial wastewater. A poly(acrylonitrile)-grafted palm cellulose copolymer was synthesized by a conventional free radical initiating process followed by synthesis of a poly(amidoxime) ligand by oximation reaction. The resulting products were characterized by FT-IR, FE-SEM, EDX, TGA, DSC, and XPS. The poly(amidoxime) ligand was used to coordinate with and extract a series of transition metal ions from water samples. The binding capacity (qe) of the ligand with the metal ions such as copper, iron, cobalt, nickel, and lead were 260, 210, 168, 172, and 272 mg g, respectively at pH 6. The adsorption process followed the pseudo-first-order kinetic model (R > 0.99) and as well as the Freundlich isotherm model (R > 0.99) indicating the occurrence of a multi-layer adsorption process in the amidoxime ligand adsorbent. Results from reusability studies show that the ligand can be recycled for at least 10 cycles without any significant losses to its initial adsorption capacity. The synthesized polymeric ligand was shown to absorb heavy metals from electroplating wastewater with up to 95% efficiency.
一种名为棕榈油空果串（EFB）的废弃材料被用作纤维素的来源，用于开发用于从工业废水中去除金属离子的聚合材料。通过常规自由基引发过程合成了接枝聚丙烯腈的棕榈纤维素共聚物，然后通过肟化反应合成了聚（偕胺肟）配体。通过 FT-IR、FE-SEM、EDX、TGA、DSC 和 XPS 对所得产物进行了表征。将得到的偕胺肟配体用于与水样品中的一系列过渡金属离子配位并提取。配体与铜、铁、钴、镍和铅等金属离子的结合容量（qe）分别为 260、210、168、172 和 272mg/g，pH 值为 6。吸附过程遵循准一级动力学模型（R>0.99）和 Freundlich 等温线模型（R>0.99），表明在偕胺肟配体吸附剂中发生了多层吸附过程。从可重复使用性研究的结果表明，该配体在没有任何初始吸附容量明显损失的情况下可至少循环使用 10 次。所合成的聚合配体显示出可从电镀废水中吸附重金属，效率高达 95%。
