College of Environmental Science and Engineering, Hunan University, Changsha 410082, China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, China.
College of Environmental Science and Engineering, Hunan University, Changsha 410082, China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, China.
Bioresour Technol. 2018 Apr;253:64-71. doi: 10.1016/j.biortech.2018.01.018. Epub 2018 Jan 5.
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.
本研究旨在探讨热解对植物修复后得到的植物残渣中重金属稳定化的影响。苎麻残渣是在重金属污染沉积物的植物修复后收集的，在不同温度（300-700°C）下进行热解。结果表明，热解通过将金属的酸可溶部分转化为残渣形式并降低TCLP 可浸出金属含量，有效稳定了苎麻残渣中的 Cd、Cr、Zn、Cu 和 Pb。同时，还研究了将植物修复后得到的苎麻残渣热解产物用作吸附剂的再利用潜力。吸附实验结果表明，热解产物对亚甲基蓝（MB）具有优异的吸附能力，最大吸附容量为 259.27mg/g。本研究表明，热解可以作为一种有效替代方法，用于稳定植物修复后得到的植物残渣中的重金属，并且它们的热解产物可以用于染料吸附。
