Khalid Aina Mardhia, Hossain Md Sohrab, Ismail Norli, Khalil Nor Afifah, Balakrishnan Venugopal, Zulkifli Muzafar, Yahaya Ahmad Naim Ahmad
School of Industrial Technology, Universiti Sains Malaysia, Gelugor, Penang 11800, Malaysia.
University of Kuala Lumpur-Malaysian Institute Chemical & Bioengineering Technology (UniKL-MICET), Lot 1988, Taboh Naning, Alor Gajah, Melaka 78000, Malaysia.
Polymers (Basel). 2020 Dec 30;13(1):112. doi: 10.3390/polym13010112.
In the present study, magnetic oil palm empty fruits bunch cellulose nanofiber (M-OPEFB-CNF) composite was isolated by sol-gel method using cellulose nanofiber (CNF) obtained from oil palm empty fruits bunch (OPEFB) and FeO as magnetite. Several analytical methods were utilized to characterize the mechanical, chemical, thermal, and morphological properties of the isolated CNF and M-OPEFB-CNF. Subsequently, the isolated M-OPEFB-CNF composite was utilized for the adsorption of Cr(VI) and Cu(II) from aqueous solution with varying parameters, such as pH, adsorbent doses, treatment time, and temperature. Results showed that the M-OPEFB-CNF as an effective bio-sorbent for the removal of Cu(II) and Cr(VI) from aqueous solution. The adsorption isotherm modeling revealed that the Freundlich equation better describes the adsorption of Cu(II) and Cr(VI) on M-OPEFB-CNF composite. The kinetics studies revealed the pseudo-second-order kinetics model was a better-described kinetics model for the removal of Cu(II) and Cr(VI) using M-OPEFB-CNF composite as bio-sorbent. The findings of the present study showed that the M-OPEFB-CNF composite has the potential to be utilized as a bio-sorbent for heavy metals removal.
在本研究中，以从油棕空果串（OPEFB）获得的纤维素纳米纤维（CNF）和作为磁铁矿的FeO为原料，通过溶胶 - 凝胶法制备了磁性油棕空果串纤维素纳米纤维（M - OPEFB - CNF）复合材料。采用多种分析方法对所制备的CNF和M - OPEFB - CNF的力学、化学、热学和形态学性质进行了表征。随后，将所制备的M - OPEFB - CNF复合材料用于从水溶液中吸附Cr(VI)和Cu(II)，考察了pH值、吸附剂用量、处理时间和温度等不同参数的影响。结果表明，M - OPEFB - CNF是一种从水溶液中去除Cu(II)和Cr(VI)的有效生物吸附剂。吸附等温线模型表明，Freundlich方程能更好地描述Cu(II)和Cr(VI)在M - OPEFB - CNF复合材料上的吸附行为。动力学研究表明，以M - OPEFB - CNF复合材料作为生物吸附剂去除Cu(II)和Cr(VI)时，拟二级动力学模型能更好地描述其动力学过程。本研究结果表明，M - OPEFB - CNF复合材料具有作为重金属去除生物吸附剂的潜力。
