Batch experiments were performed to remove Zn²⁺ by adsorption process using organic residuals (pistachio, peanut, and almond) as an adsorbent. The adsorbents were characterized by FTIR spectra, SEM images, and elemental analysis. Optimum adsorption of Zn²⁺ was obtained at pH 6 with a contact time of 45 min at room temperature with 1.0 g adsorbents. The adsorption of Zn²⁺ was found to well describe Langmuir isotherm model and a pseudo-second-order rate equation. The maximum adsorption capacity of pistachio, peanut, and almond is as follows; 59.52 mgg-1, 54.64 mgg-1, and 51.81 mgg-1, respectively. Functional groups on shell surfaces can cooperate with metal ions in many ways such as electrostatic interaction, ion exchange, complex formation, and diffusion. This study has shown that pistachio, peanut, and almond shell can be used for reducing Zn²⁺ from aqueous solutions as an eco-friendly, low-cost adsorbent. The end-product containing organic compounds and zinc can be used as a soil conditioner. Furthermore, the usage of the organic shell as a sorbent for the capturing of zinc from contaminated water ensures both the technical advantage and cost-effectiveness for the sustainable environmental management concept.

使用有机残留物（开心果、花生和杏仁）作为吸附剂，进行批量实验以通过吸附过程去除Zn ²⁺。吸附剂通过 FTIR 光谱、SEM 图像和元素分析进行​​表征。Zn ^{2+ 的}最佳吸附是在 pH 值为 6 时与 1.0 g 吸附剂在室温下接触时间为 45 分钟获得的。Zn ²⁺的吸附发现可以很好地描述朗缪尔等温线模型和伪二阶速率方程。开心果、花生、杏仁的最大吸附量如下；分别为 59.52 mg-1、54.64 mg-1 和 51.81 mg-1。壳表面的官能团可以通过静电相互作用、离子交换、络合物形成和扩散等多种方式与金属离子协同作用。该研究表明，开心果、花生和杏仁壳可用于减少 Zn ²⁺来自水溶液作为一种环保、低成本的吸附剂。含有有机化合物和锌的最终产品可用作土壤调节剂。此外，使用有机壳作为吸附剂从受污染的水中捕获锌，确保了可持续环境管理概念的技术优势和成本效益。