芦竹修复收获物的热解过程会造成重金属的二次污染,本文作者研究外加物料Al_2O_3、CaCO_3、FeCl_3和NaOH的添加对热解过程中重金属稳定性的影响。结果表明,当芦竹粉在外加5%Al_2O_3、250°C下热解2 h,37%As和97%Cd固定在芦竹生物炭中;在外加5%CaCO_3、400°C下热解1 h,59%Pb固定在芦竹生物炭中。在芦竹热解最优条件下通过BCR法分析可知,Cd主要以残渣态存在,Pb和As主要以可氧化态存在。由XRD分析可知,As主要存在于Ca_2As_2O_7中,Cd主要存在于Cd(Al Cl4)2、CdPbO_3或CdSO_3中,Pb主要存在于Pb_3O_2SO_4中。 The effects of Al 2 O 3, CaCO 3, FeCl 3 and NaOH addition on the stability of heavy metals in the pyrolysis process were studied by the pyrolysis of Arundinus rehmanniae. The results showed that when Arundo donax was pyrolyzed at 5% Al 2 O 3 and 250 ° C for 2 h, 37% As and 97% Cd were immobilized on Arundo donax biochar. Pyrolytic 1 was treated with 5% CaCO 3 at 400 ° C h, 59% Pb fixed in Arundo donax biochar. The results of BCR analysis showed that Cd was mainly in the residual state, and Pb and As were mainly oxidizable. From XRD analysis, As is mainly found in Ca 2 As 2 O 7, mainly in Cd (AlCl 4) 2, CdPbO 3 or CdSO 3, while Pb mainly exists in Pb 3 O 2 SO 4.