School of Applied Physics, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, 43600 Bangi, Selangor, Malaysia.
Bioresour Technol. 2013 Jan;128:571-7. doi: 10.1016/j.biortech.2012.11.010. Epub 2012 Nov 10.
Oil palm empty fruit bunch (EFB) fibers were employed to remove dyes from aqueous solutions via adsorption approaches. The EFB fibers were modified using citric acid (CA) and polyethylenimine (PEI) to produce anionic and cationic adsorbents, respectively. The CA modified EFB fibers (CA-EFB) and PEI-modified EFB fibers (PEI-EFB) were used to study the efficiency in removing cationic methylene blue (MB) and anionic phenol red (PR) from aqueous solutions, respectively, at different pHs, temperatures and initial dye concentrations. The adsorption data for MB on the CA-EFB fitted the Langmuir isotherm, while the adsorption of PR on the PEI-EFB fitted the Freundlich isotherm, suggesting a monolayer and heterogeneous adsorption behavior of the adsorption processes, respectively. Both modified fibers can be regenerated up to seven adsorption/desorption cycles while still providing as least 70% of the initial adsorption capacity.
油棕空果串（EFB）纤维被用于通过吸附方法从水溶液中去除染料。使用柠檬酸（CA）和聚乙烯亚胺（PEI）对 EFB 纤维进行改性，分别得到阴离子和阳离子吸附剂。CA 改性 EFB 纤维（CA-EFB）和 PEI 改性 EFB 纤维（PEI-EFB）分别用于研究在不同 pH 值、温度和初始染料浓度下从水溶液中去除阳离子亚甲蓝（MB）和阴离子酚红（PR）的效率。CA-EFB 上对 MB 的吸附数据符合 Langmuir 等温线，而 PEI-EFB 上对 PR 的吸附符合 Freundlich 等温线，表明吸附过程分别为单层和非均相吸附行为。两种改性纤维在多达七个吸附/解吸循环后仍可再生，同时仍提供至少 70%的初始吸附容量。
