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Removal of polycyclic aromatic hydrocarbons from soil using a composite material containing iron and activated carbon in the freeze-dried calcium alginate matrix: Novel soil cleanup technique
Journal of Hazardous Materials ( IF 13.6 ) Pub Date : 2018-03-08 , DOI: 10.1016/j.jhazmat.2018.02.054
Mako Funada , Takeshi Nakano , Hiroshi Moriwaki

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 BaPeq) for the sample decreased from 0.27 to 0.10 mg kg-1 by this method. The presented method is very simple, economical, and environment-friendly.



中文翻译:

在冻干海藻酸钙基质中使用含铁和活性炭的复合材料从土壤中去除多环芳烃:新型土壤净化技术

一种新颖的净化技术,通过使用铁粉作为磁性材料和活性炭作为吸附剂的复合材料在冻干海藻酸钙基质(Fe-AC-alg)中进行磁分离,通过磁性分离从固体样品中去除多环芳烃(PAHs) ) 已经被开发出来。将Fe-AC-alg粉末(50 mg)与1.0 g具有12种已吸附PAHs的玻璃珠混合,不添加溶剂就以300 rpm的速度摇动。摇动后,使用永磁体分离Fe-AC-alg粉末。测定从通过该方法处理的玻璃珠中提取的PAH的量。多环芳烃的去除率(%)超过96%。将路边的土壤样品(10 g)与Fe-AC-alg(1.0 g)混合2周。通过本发明的技术从样品中除去[%]苯并[a] re。有毒当量浓度(ΣBaP用这种方法将样品的当量当量从0.27降低到0.10 mg kg -1。所提出的方法非常简单,经济且环境友好。

更新日期:2018-03-09
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