This study aimed to investigate the effect of pyrolysis on the stabilization of heavy metals in plant residues obtained after phytoremediation. Ramie residues, being collected after phytoremediation of metal contaminated sediments, were pyrolyzed at different temperatures (300–700 °C). Results indicated that pyrolysis was effective in the stabilization of Cd, Cr, Zn, Cu, and Pb in ramie residues by converting the acid-soluble fraction of metals into residual form and decreasing the TCLP-leachable metal contents. Meanwhile, the reutilization potential of using the pyrolysis products generated from ramie residues obtained after phytoremediation as sorbents was investigated. Adsorption experiments results revealed that the pyrolysis products presented excellent ability to adsorb methylene blue (MB) with a maximum adsorption capacity of 259.27 mg/g. This study demonstrated that pyrolysis could be used as an efficient alternative method for stabilizing heavy metals in plant residues obtained after phytoremediation, and their pyrolysis products could be reutilized for dye adsorption.

这项研究旨在研究热解对植物修复后获得的植物残渣中重金属稳定化的影响。在对金属污染的沉积物进行植物修复后收集的麻残留物会在不同温度（300-700°C）下热解。结果表明，通过将金属的酸溶级分转化为残留物形式并降低TCLP可浸出的金属含量，热解有效地稳定了麻残留物中的Cd，Cr，Zn，Cu和Pb。同时，研究了利用由植物修复后获得的麻残渣产生的热解产物作为吸附剂的再利用潜力。吸附实验结果表明，热解产物具有极好的吸附亚甲基蓝（MB）的能力，最大吸附量为259.27 mg / g。