Data for: High-resolution Continuum Source Graphite Furnace Atomic Absorption Spectrometry Determination of Ecotoxic and Precious Metals in Waste Mobile Phones after Selective Sorption

Waste printed circuit boards (PCBs) contain high amounts of valuable precious metals (PMs) as well as ecotoxic elements (TE). Recycling waste PCBs enables the recovery of precious metals minimize harm to the environment caused by discarded electronics. This study established a benign and effective process for selective recovery of Au, Pt, Pd and ecotoxic elements such as As, Cd, Cr, Pb, Sb from waste PCBs. Pre-treating waste PCBs with a mixture of HCl and H2O2 in autoclave was fast and efficient decomposition. In order to recover PMs and TE from obtained PCB solutions, two sorbents were synthesized. 0.1 М HCl is sufficient for extraction of 96 – 100 % of TE and 3 М HCl is used for extraction of 100% of PMs from PCB-solutions. The developed approach of transferring analyte into a solution is characterized as highly productive and make it possible to avoid any impact of matrices upon selectivity extraction and to determine analyte with high accuracy. The concentrations of analytes in five PCB samples were found in range of 10-6 - 10-1 % wt by HR-CS GFAAS method. HR-CS-GFAAS limits of determination and upper limits of analyte content determination were (µg·mL-1) 0.0008 and 0.1 (Au); 0.0008 and 0.1 (Pd); 0.001 and 0.8 (Pt); 0.0005 and 0.3 (As); 0.00006 and 0.01 (Cd); 0.0002 and 0.03 (Cr); 0.0005 and 0.1 (Pb); 0.0005 and 0.25 (Sb). The obtained data will be useful for the development of processes for the recycling of analytes from waste mobile phones.

废弃印刷电路板（Printed Circuit Boards, PCBs）富含高价值贵金属（Precious Metals, PMs）与生态毒性元素（Ecotoxic Elements, TE）。回收废弃印刷电路板，既可实现贵金属的回收再利用，又可最大限度降低废弃电子设备对环境造成的危害。本研究开发了一种温和高效的工艺，可从废弃印刷电路板中选择性回收金（Au）、铂（Pt）、钯（Pd）以及砷（As）、镉（Cd）、铬（Cr）、铅（Pb）、锑（Sb）等生态毒性元素。采用高压釜内HCl与H₂O₂混合体系对废弃印刷电路板进行预处理，可实现快速高效的分解。为从所得PCB浸出液中回收贵金属与生态毒性元素，本研究合成了两种吸附剂。采用0.1 mol/L HCl即可从PCB浸出液中萃取96%~100%的生态毒性元素，而使用3 mol/L HCl则可100%萃取其中的贵金属。本研究开发的待测物溶出工艺具有高效性，可避免基体对选择性萃取的干扰，实现待测物的高精度测定。采用高分辨率连续光源石墨炉原子吸收光谱法（High Resolution-Continuum Source Graphite Furnace Atomic Absorption Spectrometry, HR-CS GFAAS）对5个PCB样品中的待测物浓度进行测定，结果显示其质量分数范围为10⁻⁶~10⁻¹%。该方法的检出限与待测物含量测定上限（单位：µg·mL⁻¹）分别为：金0.0008与0.1；钯0.0008与0.1；铂0.001与0.8；砷0.0005与0.3；镉0.00006与0.01；铬0.0002与0.03；铅0.0005与0.1；锑0.0005与0.25。本研究所得数据可为废弃手机中待测物的回收工艺开发提供参考。