National Research Council of Italy - Institute of Atmospheric Pollution Research (CNR-IIA), Via Salaria km 29.3, 00015, Monterotondo (RM), Italy; Sapienza University of Rome, Rome, 00185, Italy.
National Research Council of Italy - Institute of Atmospheric Pollution Research (CNR-IIA), Via Salaria km 29.3, 00015, Monterotondo (RM), Italy.
Chemosphere. 2020 Jan;239:124666. doi: 10.1016/j.chemosphere.2019.124666. Epub 2019 Aug 25.
The toxicity of polychlorinated biphenyls (PCBs), polychlorinated dibenzo-p-dioxins (PCDDs) and dibenzofurans (PCDFs) is well known, and for this reason studying and monitoring these chemicals is fundamental. Activated carbon fibers (ACFs) are made of an adsorbent material widely used in the industrial field for the removal of micropollutants. The first step in this work was to perform a physico-chemical characterization of the adsorbent, focused on the analytical use of it. In particular, its specific surface area was defined around 2500 m/g consisting in a homogeneous microporosity distribution and the characterization of ACF surface functional groups pointed out a balance between basic and acidic group. The validity of using the ACF as solid phase extraction and as passive sampler for PCDD/Fs and PCBs in water, has been evaluated by the percentage recovery (R %) of C-labeled standards of PCDD/Fs and PCBs added in a known volume of water. The results were compared to the R% of Liquid-Liquid Extraction which showed a better reproducibility of the results and the proposed method satisfy completely the requirements of US EPA reference methods.
多氯联苯（PCBs）、多氯二苯并对二恶英（PCDDs）和多氯二苯并呋喃（PCDFs）的毒性是众所周知的，因此研究和监测这些化学物质是至关重要的。活性炭纤维（ACF）由一种吸附剂材料制成，广泛应用于工业领域，用于去除微污染物。这项工作的第一步是对吸附剂进行物理化学特性分析，重点是分析用途。特别是，其比表面积约为 2500 m/g，呈均匀的微孔分布，对 ACF 表面官能团的表征表明其碱性和酸性基团之间存在平衡。通过在已知体积的水中加入 C 标记的 PCDD/Fs 和 PCBs 标准品的回收率（R%），评估了 ACF 作为固相萃取和被动采样在水中的 PCDD/Fs 和 PCBs 的有效性。结果与液液萃取的 R%进行了比较，液液萃取显示出更好的结果重现性，所提出的方法完全满足美国环保署参考方法的要求。
