School of Materials Science and Engineering, Guilin University of Electronic Technology, Guilin, 541004, China.
Engineering Research Center of Electronic Information Materials and Devices, Ministry of Education, Guilin University of Electronic Technology, Guilin, 541004, People's Republic of China.
Environ Sci Pollut Res Int. 2023 Nov;30(53):113394-113408. doi: 10.1007/s11356-023-30377-z. Epub 2023 Oct 17.
Palladium (Pd) is widely used in catalyst, aerospace, and medical applications, but only 1% of its reserves are found in nature. So, the recovery of Pd(II) is very important. Natural fibers are a good adsorption material, and the abundant functional groups in bamboo shoot shell (BSS) fibers can form interactions with metal particles. However, few studies on Pd(II) adsorption using BSS fibers exist. In the present work, waste bamboo shoot shells were doped with titanium dioxide (TiO) particles, and the surface activation of BSS-TiO@CA by citric acid (CA) was carried out to prepare an efficient and recyclable adsorbent BSS-TiO@CA for the adsorption of Pd(II). The adsorption performance, adsorption mechanism, and regeneration performance of BSS-TiO@CA on Pd(II) were systematically analyzed by continuous adsorption experiments, characterization, and response surface method. It was found that the surface-activated waste bamboo shoot shells had an outstanding adsorption capacity of Pd(II), and the maximum adsorption rate of BSS-TiO@CA reached 85% with a maximum adsorption capacity (Q) of 175.74 mg/g. The functionalized use of waste bamboo shoot shells provides a new idea for the development of sustainable, cost-effective, and environmentally friendly adsorbents.
钯（Pd）广泛应用于催化剂、航空航天和医疗领域，但自然界中仅 1%的储量为钯。因此，回收钯（Pd）非常重要。天然纤维是一种良好的吸附材料，竹笋壳（BSS）纤维中丰富的官能团可以与金属颗粒形成相互作用。然而，关于 BSS 纤维对钯（Pd）吸附的研究很少。在本工作中，将废竹笋壳掺杂二氧化钛（TiO）颗粒，并通过柠檬酸（CA）对 BSS-TiO@CA 进行表面活化，制备了一种高效且可回收的吸附剂 BSS-TiO@CA，用于吸附钯（Pd）。通过连续吸附实验、表征和响应面法系统分析了 BSS-TiO@CA 对 Pd（II）的吸附性能、吸附机理和再生性能。结果表明，表面活化后的废竹笋壳对钯（Pd）具有优异的吸附能力，BSS-TiO@CA 的最大吸附率达到 85%，最大吸附量（Q）为 175.74 mg/g。废竹笋壳的功能化利用为开发可持续、经济高效且环保的吸附剂提供了新的思路。
