Evdokimova G A, Mozgova N P
Institute of the North Industrial Ecology Problems, 14 Fersman St., Apatity 184209, Murmansk region, Russia.
J Environ Monit. 2003 Aug;5(4):667-70. doi: 10.1039/b210278c.
The long-term observations of the restoration of chemical and biological properties of cultivated podzol soil polluted by airborne emissions from a copper-nickel smelter located in the western Arctic of Russia were carried out. After 8 years, the total content of copper in soil decreased to a third (from 6230 to 2080 mg kg(-1)) and nickel to a sixth (from 3500 to 580 mg kg(-1)). Based on these observations, the removal time for heavy metals to reach permissible levels was calculated. The estimate was 100 years for copper and 108 years for nickel. Soil remained toxic to wheat seedlings, especially to their roots, for the whole observation period. A restoration of the number and activity of soil microorganisms was associated with the reduction in soil metal-toxicity. The number of non-sporeforming saprophytic bacteria was quickly restored concurrently with the removal of metals from the soil; fungal biomass also increased.
对俄罗斯北极西部一家铜镍冶炼厂排放的空气污染物所污染的耕种灰化土的化学和生物学特性恢复情况进行了长期观测。8年后，土壤中铜的总含量降至三分之一（从6230毫克/千克降至2080毫克/千克），镍降至六分之一（从3500毫克/千克降至580毫克/千克）。基于这些观测结果，计算了重金属达到允许水平的去除时间。铜的估计时间为100年，镍为108年。在整个观测期内，土壤对小麦幼苗仍然有毒，尤其是对其根部。土壤微生物数量和活性的恢复与土壤金属毒性的降低有关。随着土壤中金属的去除，不形成芽孢的腐生细菌数量迅速恢复；真菌生物量也增加了。
