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为比较3种不同杨柳科植物对氰化物污染的修复潜力,采用长出新根须和嫩叶的植物枝条为材料,在自行设计的250mL生物反应器中生长72～120h,培养温度为18～20℃,氰化物的质量浓度0.45～0.49mg/L.试验结果表明,水溶液中大部分的氰化物能被试验植物去除,但去除率种间存在明显差异,垂柳(SalixbabylonicaL.)在72h内将水溶液中97.8%氰化物去除(去除率0.095mg/(kg.h)),其次为苏柳(SalixmatsudanaKoidz×SalixalbaL.)108h内将94.0%氰化物去除(去除率0.087mg/(kg.h)),意大利杨(Populusdeltoides)在120h内将71.4%氰化物去除(去除率0.057mg/(kg.h));试验所用氰化物剂量没有对试验植物产生毒性作用;植物对水溶液中氰化物的去除过程遵循零级动力学反应.
In order to compare the potential of three different kinds of willow plants to repair cyanide pollution, the plant branches growing new roots and young leaves were used as materials to grow 72 - 120 h in a self - designed 250 mL bioreactor. The incubation temperature was 18 - 20 ℃, the concentration of cyanide 0.45 ~ 0.49mg / L. The experimental results show that most of the cyanide in aqueous solution can be removed by the test plant, but the removal rate was significantly different species, weeping willows (Salixbabylonica L.) within 72h 97.8% cyanide removal (removal rate 0.095mg / (kg.h)) in aqueous solution followed by removal of 94.0% cyanide (removal rate 0.087mg / (kg.h)) within 108h of Salix matsudana Koidz × SalixalbaL. , Populus deltoides removed 71.4% of cyanide within 120h (removal rate 0.057mg / (kg.h)); the cyanide dose used in the experiment did not produce toxic effects on the test plants; the removal of cyanide by plants from aqueous solution Follow zero-order kinetic reaction.