适用于污染河水修复的可渗透反应墙材料筛选

通过中试规模的模拟试验,进行了适用于污染河水修复的可渗透反应墙(PRB)反应材料筛选研究.结果表 明,以铁屑、焦炭、沸石和石灰石为反应材料的不同配比的6个反应器(A～F)对COD、TN及TP均有一定得去除效果,其中,反应器E对COD、TN及TP的平均去除率分别是61.0%、85.8%和82.O%,显著高于其它材料配比的反应器;各反应器出水铁离子含量均高于进水,但远远低于抑制微生物降解作用的最高容许含量.综合各项指标,反应器E和F反应材料铁屑,焦炭、沸石的体积比较佳,分别为1:2:1和1:1:2,适于典型地表污水.污染河水的修复,其中又以反应器E的反应材料配比更优.

SCREENING OF THE REACTIVE MEDIA OF THE PERMEABLE REACTIVE BARRIERS(PRB)FOR REMEDIA TION OF POLLUTED RIVER WATER

The pilot study on Screening of the reactive media of the Permeable Reactive Barriers (PRB) for remediation of polluted river water was carried out. The results showed that all of reactors (A～F) which had different proportion of reactive media (scrap iron, coke, zeolite and limestone) had removal effect of contamination. Significant differences existed among the removal rates of COD, TN, NO_3~--N, NH_4~+-N and TP. The proportion of reactive media of reactor E (scrap iron: coke: zeolite= 1:2:1) was the desirable for its highest removal rates of COD, TN and TP, which were 61.0%、85.8% and 82.0%, respectively. Besides, the proportion of reactive media of reactor F (scrap iron: coke: zeolite=1:1:2) was also a suitable one. The outflow concentrations of iron ions of all of reactors, which low the maximal allowable concentration, were higher than inflow.