论文部分内容阅读
对北京及全国部分省区的共40个耕层土壤氧化 Cr(Ⅲ)的能力进行了快速试验。结果表明:被试验的耕层土壤均能将投加的 Cr(Ⅲ)部分地氧化为 Cr(Ⅳ)。各娄土壤氧化 Cr(Ⅲ)的能力与其易还原性氧化锰的含量呈显著的正相关。氧化反应与持续一月之久氧进一步对易还原性氧化锰含量低(～50ppm)的北京潮土所作试验表明:如果进入耕层土壤的 Cr(Ⅲ)达50ppm 时,一个月后所生成的Cr(Ⅳ)就可达到抑制作物生长的含量标准。
A rapid test was conducted on the ability of soil oxidation of Cr (Ⅲ) in a total of 40 tillage layers in Beijing and some provinces in China. The results showed that Cr (Ⅲ) was partially oxidized to Cr (Ⅳ) in the soils tested. The ability of each soil to oxidize Cr (Ⅲ) has a significant positive correlation with the content of its reducible manganese oxide. Oxidation reaction lasts for one month Oxygen further tests on Beijing tide soil with low content of reducible manganese oxide (~ 50ppm) show that if the Cr (Ⅲ) content in tilled soil reaches 50ppm, Cr (Ⅳ) can be achieved to inhibit the growth of crop content standards.