Lead ion removal from aqueous solutions using biochar materials from different wood species
| Authors: | Ruiqi Li, Tara L. Keyser, Thomas Elder, Qiangu Yan, Zhiyong Cai, Yucheng Peng |
| Year: | 2026 |
| Type: | Scientific Journal |
| Station: | Southern Research Station |
| DOI: | https://doi.org/10.1016/j.bmf.2026.100042 |
| Source: | Biomass Futures |
Abstract
Heavy metal contamination in water systems driven by industrialization and urbanization is a primary concern for society. The development of efficient remediation methods to reduce heavy metal contamination in water is necessary. Biochar has emerged as a promising adsorbent for heavy metals due to its unique physicochemical properties. This study investigated the effect of biochars manufactured from 12 different wood species on lead ion (Pb(II)) removal capacity in aqueous solutions. The 12 different wood species include two softwoods and 10 hardwoods. The physicochemical properties and the lead ion adsorption capacity of biochars were characterized. The Pb(II) removal capacity of biochars derived from hardwoods was significantly higher than that of softwood derived biochars. Among the hardwoods, aspen biochar exhibited the highest removal capacity (42.7 mg g-1), which can be attributed to its higher CaCO3 content compared to softwood feedstocks. These results indicate that feedstock type plays a critical role in determining the physicochemical properties of biochar and its performance in Pb(II) removal. Overall, hardwoods are more suitable feedstocks for producing biochars intended for leadcontaminated water treatment.