摘要
研究了Fenton试剂氧化处理垃圾渗滤液的最佳反应条件,在此条件下进行活性炭、沸石组合吸附法试验,并对处理效果进行比较,结果显示:在pH值为4,n(H2O2)/n(Fe2+)=10,反应时间60 min,沉淀时间90min时,Fenton试剂对渗滤液的氧化效果最好;三种组合吸附方式对渗滤液中COD的吸附效果依次为活性炭-沸石>沸石-活性炭>活性炭+沸石;对垃圾渗滤液氨氮的去除能力为:活性炭+沸石>活性炭-沸石>沸石-活性炭。经过Fenton试剂氧化-活性炭+沸石吸附处理后,COD、氨氮、色度和pH值分别为82.05 mg/L、22.65 mg/L、5倍和6.25。分析有机物的去除机理分析得出,经过Fenton试剂氧化-活性炭+沸石吸附处理,垃圾渗滤液中的有机物能够得到充分降解,其种类与各物质的含量都有所降低,特别是氨氮的含量和色度明显降低。经氧化吸附处理后,垃圾渗滤液各项指标均符合排放标准。
The optimal reaction conditions on treating refuse leachate with Fenton reagent oxidation was studied, based on which the tests of activated carbon-zeolite combination adsorption were carried out, whose treatment effect was compared, the results showed that the best effect could be got under the conditions of pH = 4, n（ H202 ）/n（ Fe2＋ ） = 10, reaction time = r, 60 min and settling time = 90 min. The ranking of the adsorption effect of COD in the leachate by three combinations was in the order：activated carbon-zeolite 〉 zeolite-activated carbon 〉 activated carbon ＋ zeolite; and the capacity of removing NH3-N in the leachate was in the order： activated carbon ＋ zeolite 〉 activated carbon-zeolite 〉 zeolite-activated carbon. COD, NH3-N, chroma and pH in the leachate were 82.05 mg/L, 22. 65 mg/L, 5 times and 6.25 respectively after the trentment by Fenton oxidation-activated carbon ＋ zeolite adsorption; and also the organisms could be fully degraded, whose sorts and content were decreased. Hence all the indexes of the refuse leachate could meet the emission standard.
出处
《环境工程》
CAS
CSCD
北大核心
2014年第2期45-50,共6页
Environmental Engineering
基金
广西矿业与环境学院实验中心项目
