Department of Environmental Engineering, Uludağ University, Görükle 16059, Bursa, Turkey.
J Environ Sci (China). 2011;23(4):616-23. doi: 10.1016/s1001-0742(09)60366-1.
The possible impacts on nitrogen-cycle in a p-nitrophenol (PNP) polluted soil and the effectiveness of wastewater sludge amendments in restoring nitrification potential and urease activity were evaluated by an incubation study. The results indicated that PNP at 250 mg/kg soil inhibited urease activity, nitrification potential, arginine ammonification rate and heterotrophic bacteria counts to some extents. After exposure to PNP, the nitrification potential of the tested soil was dramatically reduced to zero over a period of 30 days. Based on the findings, nitrification potential was postulated as a simple biochemical indicator for PNP pollution in soils. Nitrogen-cycling processes in soils responded positively to the applications of wastewater sludges. A sludge application rate of 200 tons/ha was sufficient for successful biostimulation of these nitrogen processes. The microbial activities in sludge-amended, heavy PNP-polluted soils seemed to recover after 30-45 days, indicating the effectiveness of sludge as a useful soil amendment.
采用培养试验研究了对受污染土壤中氮循环的可能影响以及废水污泥改良剂对恢复硝化潜力和脲酶活性的有效性。结果表明，土壤中 250mg/kg 的对硝基苯酚（PNP）在一定程度上抑制了脲酶活性、硝化潜力、精氨酸氨化率和异养细菌数量。暴露于 PNP 后，测试土壤的硝化潜力在 30 天内急剧降至零。基于这些发现，硝化潜力被假设为土壤中 PNP 污染的简单生化指标。土壤中的氮循环过程对废水污泥的应用反应积极。200 吨/公顷的污泥施用量足以成功地对这些氮过程进行生物刺激。在 30-45 天后，添加污泥的重 PNP 污染土壤中的微生物活性似乎得到了恢复，表明污泥作为一种有用的土壤改良剂是有效的。
