Department of Chemistry, Inha University, 100 Inharo, Incheon, 22212, South Korea; Department of Mechanical Engineering, College of Engineering, Kyung Hee University, Yongin, 445-701, South Korea; Institute of Advanced Machinery Design Technology, Korea University, Seoul, 02841, Republic of Korea.
Department of Chemistry, Inha University, 100 Inharo, Incheon, 22212, South Korea.
Chemosphere. 2023 May;323:138210. doi: 10.1016/j.chemosphere.2023.138210. Epub 2023 Feb 22.
Herein, we successfully prepared sustainable nanocomposites from agriculture waste (rice husk)-derived biochar precursor, and followed by nickel-doped, base-treated titanium dioxide nanomaterials loading for efficient lead (Pb) removal from aqueous media. By varying the loading contents of active materials, the optimized sample (Ni@Na-TiO/BC) possessed an efficient Pb adsorption capability of 122.3 mg g under the under optimum adsorption parameters, which is attributable to its specific surface area (138.09 m g) and excess functional sites. Kinetic and Isothermal examination illustrated that Pb adsorption phenomena was well followed through pseudo 2nd order and Langmuir models. In addition, superior Pb ions adsorption selectivity was recorded by optimized sample in a multi-metallic system over other existing ion (such as Cd, Mg, Ca, Cu, and Zn). Desorption experiments has been performed by using desorbing agent that demonstrates the good regeneration ability of sample. Hence, these findings provide new insight for the biowaste management by converting them into innovative adsorbents for commercial scale environmental remediation.
在此，我们成功地从农业废弃物（稻壳）衍生的生物炭前体制备了可持续的纳米复合材料，随后负载镍掺杂、堿处理的二氧化钛纳米材料，用于从水介质中有效去除铅（Pb）。通过改变活性材料的负载含量，优化后的样品（Ni@Na-TiO/BC）在最佳吸附参数下具有 122.3 mg/g 的高效 Pb 吸附能力，这归因于其比表面积（138.09 m²/g）和多余的功能位点。动力学和等温线研究表明，Pb 吸附现象通过拟二级和 Langmuir 模型得到了很好的遵循。此外，优化后的样品在多金属体系中对其他现有离子（如 Cd、Mg、Ca、Cu 和 Zn）表现出优越的 Pb 离子吸附选择性。通过使用解吸剂进行解吸实验，证明了样品具有良好的再生能力。因此，这些发现为生物废物管理提供了新的见解，即将它们转化为创新的吸附剂，用于商业规模的环境修复。
