Institute of Organic Contaminant Control and Soil Remediation, College of Resource and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, China.
J Agric Food Chem. 2011 Nov 23;59(22):12116-23. doi: 10.1021/jf202924a. Epub 2011 Oct 21.
Soybean [Glycine max (L.) Merr.] stalk-based biochar was prepared using oxygen-limited pyrolysis. We evaluated phenanthrene (PHE) and Hg(II) sorption, from single and binary component solutions, onto prepared biochar. We found that the prepared biochar efficiently removed PHE and Hg(II) from aqueous solutions. The isotherms for PHE and Hg(II) sorption could be described using linear and Tóth models, respectively, both with high regression coefficients (R(2) > 0.995). When PHE and Hg(II) coexisted in an aqueous solution, we observed direct competitive sorption, each one suppressing another. Our results provide insight into the recycling of agricultural residues, and also a new application for removal of polycyclic aromatic hydrocarbons and heavy metals from contaminated water utilizing biochar from agricultural residue.
利用限氧热解制备了基于大豆茎秆的生物炭。我们评估了制备的生物炭对单一和二元组分溶液中菲（PHE）和 Hg(II)的吸附性能。结果表明，该生物炭能够有效去除水溶液中的 PHE 和 Hg(II)。PHE 和 Hg(II)吸附的等温线可以分别用线性和托特模型来描述，这两种模型的回归系数都很高（R(2) > 0.995）。当 PHE 和 Hg(II)共存于水溶液中时，我们观察到直接的竞争吸附，彼此抑制。我们的研究结果为农业废弃物的再利用提供了新的思路，同时也为利用农业废弃物生物炭从受污染的水中去除多环芳烃和重金属提供了新的应用。
