过氧化氢预氧化去除受污染地下水中铁、锰的试验研究

STUDIED ON REMOVING FE/MN FROM THE POLLUTED GROUNDWATER BY PREOXIDATION WITH HYDROGEN PEROXIDE

通过单因素试验考察了过氧化氢投量、进水pH、预氧化时间及原水本底成分对过氧化氢预氧化去除长沙市近郊某镇受污染地下水中铁、锰效果的影响。试验结果表明,当过氧化氢投加量为0.13 mg·L-1时,铁、锰的去除率分别达到92.8%和25.6%;酸性环境有利于铁、锰的去除,当pH=5.01时,铁、锰的去除率达到最大的94.6%和48.0%;预氧化60 min,锰的去除率达到最大的56.2%,而铁的去除率随预氧化时间的增长无明显变化,保持在90%左右;原水本底成分对过氧化氢预氧化除锰的效果影响不明显。

The removal effect of iron and manganese from the polluted groundwater influenced by the dosage,the pH of influent,the preoxidation time and the raw water＇s background constituents were discussed by single factor experiment with hydrogen peroxide.The results showed that the removal rates of iron and manganese could reached at 92.8% and 25.6% with a dosage of 0.13 mg·L^-1;The acidic condition could contibute largely to the removal of iron and manganese.At pH 5.01,the maximum removal rates of iron and manganese were 94.6% and 48.0%,respectively;The largest manganese removal rates was obtained at 56.2% by preoxidation 60 minutes,while the iron removal rates had no obvious change as the proxidation time increased,which keep in about 90%.The raw water＇s background constituents had no evident influence on the removal effcet of manganese by preoxidation with hydrogen peroxide.