| 作者 | Maria V. Rechberger, Stefanie Kloss, Shan-Li Wang , Johannes Lehmann ,Harald Rennhofer, Franz Ottner, Karin Wriessnig, Gabrielle Daudin, Helga Lichtenegger, Gerhard Soja, Franz Zehetner |
| 原文摘要 | Biochar (BC) is increasingly tested as a soil amendment for immobilization of heavy metals (HMs) and other pollutants. In our study, an acidic soil amended with wood chip-derived BC showed strongly enhanced Cu and Cd sorption after 15 months of aging under greenhouse conditions. X-ray absorption near edge structure suggested formation of Cu(OH)2 and CuCO3 and upon aging increasingly Cu sorption to the BC organic phase (from 9.2% to 40.7%) as main binding mechanisms of Cu on the BCs. In contrast, Cd was predominantly bound as CdCO3 on the BCs even after 15 months (82.7%). We found indications by mid-infrared spectroscopy that the formation of organic functional groups plays a role for increased HM sorption on aged BCs. Yet, our data suggest that the accessibility of BC |