落花生对中铜与锰的富集能力研究

目的】研究落花生对中铜与锰的富集能力。【方法】通过水培的方法，研究落花生对铜和锰的吸收及修复水体能力。经过25d的培养后，用酸消解植物，采用分光光度计法测定植物中的铜和锰的含量。结果]结果表明，与对照组相比，试验组处理25d后，落花生生长状况受重金属离子的影响明显，其中高浓度组有些种苗出现腐烂情况，并且生长明显比其他组缓慢。从、蒯定结果来看，低、中、高浓度处理组中落花生对铜离子平均吸收量分别为115．2、127．2、69．4mg／kg，都显著高于对照组合量（8．2mg／kg），说明落花生对铜有一定富集能力；而在低、中、高的重金属浓度下，落花生对锰离子的平均吸收量分别为30．4、24．0、24．7μg／kg，与对照组锰离子的含量（19．2μg／kg）无明显差异，落花生对锰的富集效果并不理想。结论】落花生适用于低、中浓度重金属铜污染水体或土壤的生态修复。

Bioaccumulation Ability of Copper and Manganese by Arachis hypogaea

Objective]The aim was to research the bioaccumulation ability of copper and manganese by Arachis hy-pogaea. Method]Using the method of hydroponic, the absorption of Cu and Mn and the phytoremediation of A rachis hy-pogaea was studied. After 25 days, with acid digestion plants, the content of Cu and Mn in plants was determined by spectrophotometer method. Result] The results showed that, compared with the control group, the growth ofArachis hy- pogaea in the experimental groups was influenced by heavy metal ions obvious- ly. The high concentration groups ap- peared some seedlings decay, and growed more slowly than any other groups. The measurement results showed that, in the low concentration groups ,the average absorption of Cu ions was 115.2 mg/kg. The average absorption of Cu ions in the middle concentration groups was 127.2 mg/kg, and the average absorption of Cu ions in the high concentration groups was 69.4 mg/kg. The contents were significantly higher than the control group （8.2 mg/kg）. Arachis hypogaea had certain accumulation ability. While at the low, middle and high concentrations of Mn ions, the respective absorption of A rachis hypogaea were 30.4, 24.0, 24.7μg/kg, and had no significant differences with the blank of Mn ions content （19.2μg/kg）. Conclusion] The ecological restoration by A rachis hypogaea was suit- able for low concentration heavy metal contaminated water or soil.