Inhibitory effect of Cr(Ⅵ) on activities of soil enzymes

来源期刊：中南大学学报(英文版)2009年第4期

论文作者：彭兵 黄顺红 杨志辉 柴立元 许友泽 苏长青

文章页码：594 - 599

Key words：Cr(Ⅵ); soil; pollution; enzyme activity; inhibition

Abstract: To evaluate the influence of various Cr(Ⅵ) concentrations (0.05, 0.25, 0.50, 1.00 and 2.00 g/kg) on the activity of soil enzymes, the activities of catalase, polyphenol oxidase, dehydrogenase, alkaline phosphatase in soils were investigated in the incubation experiment with a period of 35 d. The results indicate that all the tested Cr(Ⅵ) concentrations significantly inhibit dehydrogenase activity by over 70% after 35 d. The activity of alkaline phosphatase is slightly inhibited during the whole experiment except for on the day 7. Cr(Ⅵ) has no obvious effect on the activity of catalase in soil. On the contrary, Cr(Ⅵ) stimulates the activity of polyphenol oxidase. The results suggest that dehydrogenase activity can be used as an indicator for assessing the severity of chromium pollution.

基金信息：the National High-Tech Research and Development Program of China
the Key Program of Science and Technology of Hunan Province, China