摘要
研究了.OH溶液降解土壤中的多溴联苯醚(PBDEs)的可行性,分析了降解机理和影响降解效果的因素。发现羟基对PBDEs有很强的降解能力。当初始质量浓度为3 mg/kg时,降解率达到97.54%;降解率随着.OH溶液投加量的增加而增加,当投加量为4mL/g时,降解率达到96.38%,再增加投加量,降解率增加不明显;温度对降解率的影响很大,在20℃降解率为96.5%,而达到40℃时,降解率只有89.57%;.OH能迅速与污染物发生反应,当反应进行1 min后,降解率就达到95.6%,再增加反应时间,降解率增加的很小;采用GC-MS对BDE15的降解产物进行定性分析,发现降解过程中,BDE15被大量降解,并最终被降解为CO2和H2O。
The feasibility of degradation of PBDEs in soil by ·OH solution is studied and factors affecting the degradation and the degradation mechanism are analyzed.It is found in the test that PBDEs has strong degradation ability.When the initial concentration is 3 mg/kg,the degradation rate can reach 97.54%;the degradation rate increases with the increase of the ·OH solution dosage,when the dosage is 4 mL/g,the degradation rate can be up to 96.38%,and but when the ·OH solution dosage is increased again,the degradation rate doesn't increase obviously;the impact of temperature on the degradation rate is obvious,the degradation can reach 96.5% at 20 ℃ and only 89.57% at 40 ℃;·OH can quickly react with pollutants,the degradation rate can reach 95.6% within 1 min,and then the degradation rate of increase is little by increasing reaction time.The degradation products are tested by GC-MS and it is found that BDE15 is totally degraded and finally degraded to CO2 and H2O.
出处
《工业安全与环保》
北大核心
2013年第6期52-55,共4页
Industrial Safety and Environmental Protection
基金
江苏省科技支撑项目资助(BE2011745)
国家博士后基金项目资助(2011M500871)
作者简介
吴春笃,男,1962年生,教授,博士生导师,主要从事水污染控制技术研究.;范翠萍,女,1983年生,硕士研究生,主要从事水污染控制技术研究.;
