改性纳米碳黑对盐渍化土壤有效态Cd和Ni的影响

Influence of Modified Nano-carbon Black on Available Cd and Available Ni in Saline Soil

通过培养实验,研究了添加改性纳米碳黑对污染盐渍土壤中有效态Cd、Ni量的影响。结果表明,改性纳米碳黑可以降低土壤中有效态Cd和Ni量,且对低质量分数Cd的钝化效果较明显,对Ni的钝化效果不明显。不同质量分数Cd、Ni污染的土壤pH变化表现出一致的趋势。培养35d后,所有处理的土壤pH均极显著低于培养初期,添加与未添加改性纳米碳黑处理间土壤pH无显著性差异。

After adding modified nano-carbon black to the saline soil, the bioavailability of Cd and Ni in saline soil was studied by cultivation experiment, and soil pH was measured. The results showed that modified nano-carbon black could reduce the contents of available Cd and available Ni in soil, and the passivation effect on low concentration of Cd was obvious, but the passivation effect on Ni was not obvious. The changes of soil p H were consistent in the polluted soil under different concentrations of Cd , Ni. After culturing for 35 d, the soil pH in all treatments were significantly lower than those in the early stage of cultivation. There was no significant difference between the soils adding and without addiing modified nano-carbon black.