a Directorate of Construction & Technical Works , Sinop University , Sinop , Turkey.
Int J Phytoremediation. 2019;21(6):556-563. doi: 10.1080/15226514.2018.1537254. Epub 2019 Feb 7.
Defatted Laurus nobilis leaves as a natural biosorbent was first evaluated for elimination of toxic heavy metals such as Pb(II), Cd(II), Zn(II), Cu(II) from aqueous solutions for its wide availability as forest industry waste, in this study. The effects of solution pH, contact time, biosorbent dosage, initial metal ions concentration, ionic strength, humic acid effect, and their competitive effect on the biosorption of lead(II), cadmium(II), Copper(II), and zinc(II) by defatted Laurus nobilis leaves waste (LW) were studied for each metal. The biosorbent was characterized using FT-IR and SEM images. Comparative isotherm and kinetic studies were performed. The sorption of Cd(II) and Zn(II) on LW fitted better in the Freundlich model but Pb(II) and Cu(II) sorption fitted better in the Langmuir model. From the obtained results, the pseudo-second-order kinetic model described the biosorption of cadmium, lead, zinc copper ions the best. The biosorbent showed the maximum biosorption capacities (q) of 96.2, 8.6, 8.7, and 6.0 mg g for lead, cadmium, zinc, and copper, respectively. These results indicated that LW may be used as an effective and inexpensive heavy metal remediation material. Comparison to previous studies showed that LW is also comparable to (or better than) several other biosorbents.
脱脂月桂叶作为一种天然生物吸附剂，首先被评估用于从水溶液中去除有毒重金属，如 Pb(II)、Cd(II)、Zn(II)、Cu(II)，因为它广泛存在于森林工业废物中。在这项研究中，研究了溶液 pH 值、接触时间、生物吸附剂用量、初始金属离子浓度、离子强度、腐殖酸效应及其对脱脂月桂叶废物 (LW) 对 Pb(II)、Cd(II)、Cu(II)和 Zn(II)的吸附的竞争效应。使用 FT-IR 和 SEM 图像对生物吸附剂进行了表征。进行了比较等温线和动力学研究。Cd(II)和 Zn(II)在 LW 上的吸附更符合 Freundlich 模型，而 Pb(II)和 Cu(II)的吸附更符合 Langmuir 模型。从获得的结果来看，准二级动力学模型最好地描述了镉、铅、锌和铜离子的吸附。生物吸附剂对铅、镉、锌和铜的最大吸附容量（q）分别为 96.2、8.6、8.7 和 6.0mg g。这些结果表明，LW 可作为一种有效且廉价的重金属修复材料。与之前的研究相比，LW 也可与（或优于）其他几种生物吸附剂相媲美。
