Chromium accumulation, microorganism population and enzyme activities in soils around chromium-containing slag heap of steel alloy factory
Chromium accumulation, microorganism population and enzyme activities in soils around chromium-containing slag heap of steel alloy factory
复制标题
合金钢厂含铬渣堆周围土壤铬积累、微生物种群及酶活性
DOI：
10.1016/s1003-6326(08)60259-9
复制
发表时间：
2009-02-01
影响因子：
4.5
通讯作者：
Zhou Li-cheng
中科院分区：
文献类型：
--
作者：
Huang Shun-hong;Peng Bing;Zhou Li-cheng
铬工业周边土壤中铬污染的环境风险显著。研究长期暴露于铬污染的生态系统中土壤微生物的功能具有重要意义。从某合金钢厂渣堆不同地点采集了45个土壤样品，分析了铬污染水平及其对土壤微生物和酶活性的影响。结果表明：矿渣堆下、矿渣堆附近和厂区外土壤中总铬的平均浓度分别超过中国土壤二级环境质量标准阈值354%、540%和184%，分别是当地背景值的15倍、21倍和9倍；铬负荷的增加导致土壤微生物活性的变化，土壤微生物数量与铬含量呈负相关。土壤中的铬使脱氢酶活性大大降低。结果表明，脱氢酶活性可以作为钢合金厂区域铬污染程度的一个指标。
The environmental risk of chromium pollution is pronounced in soils adjacent to chromate industry. It is important to investigate the functioning of soil microorganisms in ecosystems exposed to long-term contamination by chromium. 45 soil samples obtained from different places of the slag heap in a steel alloy factory were analyzed for chromium contamination level and its effect on soil microorganisms and enzyme activities. The results show that the average concentrations of total Cr in the soil under the slag heap, adjacent to the slag heap and outside the factory exceed the threshold of Secondary Environmental Quality Standard for Soil in China by 354%, 540% and 184%, respectively, and are 15, 21 and 9 times higher than the local background value, respectively. Elevated chromium loadings result in changes in the activity of the soil microbe, as indicated by the negative correlations between soil microbial population and chromium contents. Dehydrogenase activity is greatly depressed by chromium in the soil. The results imply that dehydrogenase activity can be used as an indicator for the chromium pollution level in the area of the steel alloy factory.