Sawdust wastes were used as precursors to prepare adsorbents by combustion and pyrolysis for experimental and mechanism studies and determine the potential of biomass extracted from agro-industrial residues for Pb-polluted soil remediation. Pot experiments were conducted on contaminated soils near Pb–Zn mining with sawdust ash (SA) and sawdust biochar (SB) in different proportions and dosage ratios. Studies have indicated that the application of biomass materials can enhance the adsorption, complexation and precipitation of Pb cations in soil and reduce the mobility of Pb. The concentrations of SPLP-Pb and DTPA-extractable Pb in amended soils were the lowest under 1% 1:2 and 5% 1:1 treatment, respectively. Results of fraction extraction and XANES analysis showed that the materials change the main forms of Pb in soil. Moreover, the binding behavior of Pb with organic matter increases the proportion of Pb (Ac)₂, leading to the transformation of high toxicity Pb-compounds into precipitates and complexes. The remediation methods of 2% 1:2 and 5% 1:2 were better than those of other methods in stabilizing Pb in soil. This study indicated that heat-treated sawdust can be used for Pb-polluted soil remediation, which is a type of environmental remediation measure with considerable ecological potential.

木屑废物被用作前驱物，通过燃烧和热解制备吸附剂，用于实验和机理研究，并确定了从农业工业残留物中提取的生物质对铅污染的土壤进行修复的潜力。在铅锌矿开采附近的污染土壤上进行盆栽试验，使用不同比例和剂量比的锯末（SA）和锯末生物炭（SB）。研究表明，生物质材料的应用可以增强土壤中Pb阳离子的吸附，络合和沉淀，并降低Pb的迁移率。在1％1：2和5％1：1处理下，改良土壤中SPLP-Pb和DTPA可提取的Pb的浓度最低。馏分提取和XANES分析结果表明，这些物质改变了土壤中Pb的主要形式。此外，₂，导致高毒性的铅化合物转化为沉淀物和复合物。2％1：2和5％1：2的修复方法在稳定土壤中Pb方面优于其他方法。这项研究表明，经过热处理的锯末可以用于铅污染土壤的修复，这是一种具有很大生态潜力的环境修复措施。