Shinshu University, Faculty of Textile Science and Technology, Division of Applied Biology, 3-15-1, Tokida, Ueda, 386-8567, Japan.
Research Center for Environmental Preservation, Osaka University, Yamadaoka 2-4, Suita, Osaka, 565-0871, Japan.
J Hazard Mater. 2018 Jun 5;351:232-239. doi: 10.1016/j.jhazmat.2018.02.054. Epub 2018 Mar 8.
A novel clean-up technology to remove polycyclic aromatic hydrocarbons (PAHs) from solid samples by magnetic separation using a composite containing iron powder as a magnetic material and activated carbon as an adsorbent in the freeze-dried calcium alginate matrix (Fe-AC-alg) has been developed. The Fe-AC-alg powder (50 mg), mixed with 1.0 g of glass beads having 12 kinds of adsorbed PAHs, was shaken without adding solvents at 300 rpm. After shaking, the Fe-AC-alg powder was separated using a permanent magnet. The quantity of the PAHs extracted from the glass beads treated by this method was determined. The removal (%) of the PAHs was over 96%. A roadside soil sample (10 g) was mixed with the Fe-AC-alg (1.0 g) for 2 weeks. The removal (%) of benzo[a]pyrene from the sample by the presented technique was 78%. The toxic equivalent concentration (Σ BaP) for the sample decreased from 0.27 to 0.10 mg kg by this method. The presented method is very simple, economical, and environment-friendly.
一种新型的清洁技术，用于通过磁性分离从固体样品中去除多环芳烃（PAHs），该技术使用包含铁粉作为磁性材料和活性炭作为吸附剂的复合材料，在冷冻干燥的海藻酸钠基质（Fe-AC-alg）中使用。将 Fe-AC-alg 粉末（50mg）与 1.0g 具有 12 种吸附的 PAHs 的玻璃珠混合，在 300rpm 下不添加溶剂进行摇动。摇动后，使用永久磁铁分离 Fe-AC-alg 粉末。用这种方法处理的玻璃珠中提取的 PAHs 的量被确定。PAHs 的去除率（%）超过 96%。将 10g 路边土壤样品与 1.0g Fe-AC-alg 混合 2 周。通过该技术，从样品中去除苯并[a]芘的去除率为 78%。通过该方法，样品的毒性等效浓度（Σ BaP）从 0.27 降至 0.10mg/kg。该方法非常简单、经济且环保。
