过碳酰胺对土壤中非离子表面活性剂的修复研究

过碳酰胺是一种新型精细化工品,也是一种新型N肥,其应用和开发在国外已得到广泛的研究,而在我国还刚刚起步.为考察过碳酰胺作为一种N肥去除土壤中有机污染物的作用和潜力,将修复与施肥结合,为过碳酰胺应用于环境污染修复提供新的理论依据,特进行了本研究.本文采用室内土培试验等手段,研究了1种酸性土壤中施入过碳酰胺后对2种非离子表面活性剂TritonX-100和Tween80的降解效果.试验结果表明:过碳酰胺对2种非离子表面活性剂都有明显的降解效果,降解速度均是在第2周时较快,此后.随着降解时间的延长,降解速率逐渐下降.8周后1000mg/kg Tween80的残留浓度仅有195.46mg/kg土,降解率高达80%以上.5 mmol/kg的过碳酰胺降解2周后已有明显降解效果,但继续增加过碳酰胺浓度.其降解效果并非相应增加.

Remediation effects of percarbamide on soil contaminated by nonionic surfactants

Percarbamide is an important chemical product and a new fertilizer, widely used abroad, but not in China so far. In order to evaluate the combining effects of percarbamide as a remediation agent of nonionic surfactants and a crop fertilizer, two nonionic surfactants, Triton X-100 and Tween80, in soil were investigated with percarbamide as a remediation agent. The results showed that percarbamide could degrade well the two kinds of nonionic surfactants. The degradation speed was rapidly during the initial 2nd week and dropped with the time prolonging. The residual concentration of Tween80 was only at the level of 195.46 mg/kg, in other words, degradation ration exceeded 80%. 5 mmol/kg percarbamide had already obvious degradation effects, but the effects of percarbamide on the two nonionic surfactants did not enhance with the concentration increase of percarbamide.