Modified Fenton Degradation of 2,4-dinitrotoluene in Soil Slurries in the Presence of Lead
会议名称：《2012年环境污染与大众健康学术会议》
会议日期：2012年
学科分类：083002[工学-环境工程] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 08[工学]
基 金：supported by the Korea Ministry of Environment as the GAIA (Geo-Advanced Innovative Action) Project
关 键 词：Fenton reaction 2,4-dinitrotoluene Lead Nitroaromatic compounds Hydrogen peroxide
摘 要：This study investigates the effects of lead （Pb） on 2,4-dinitrotoluene （2,4-DNT） degradation when modified Fenton reactions are used to remediate soils contaminated with both Pb and 2,4-DNT. At all H 2 O 2 concentrations, the Pb sorption after 24 h reaction was 95%;but a significantly greater amount of Pb was sorbed at 0.01 M-0.2 M H 2 O 2 （99%） when compared with the Pb sorption at higher H 2 O 2 concentrations. This indicates Pb mobilization due to the Fenton reactions. The 2,4-DNT degradation increased with increasing H 2 O 2 concentrations from 0.01 M to 1 M, but no further increase was observed with further increase in the H 2 O 2 concentration. This could be attributed to the increased 2,4-DNT desorption due to the reductive moieties produced by the Fenton reactions at higher H 2 O 2 concentrations. At 0.01 M and 0.05 M H 2 O 2 , the 2,4-DNT degradation was similar in the presence and the absence of Pb;however, it was lower in the presence of Pb at higher H 2 O 2 concentrations （≥0.2 M）. This can be explained by the stable complex formation between Pb and soil organic matter （SOM）, which could likely reduce the loss of SOM due to Fenton reactions, hence the 2,4-DNT desorption. Thus, Pb removal prior to the application of Fenton reactions is recommended when remediating 2,4-DNT from soils contaminated with both Pb and 2,4-DNT.