Leachate is a kind of high concentration organic wastewater and in order to reduce its organic matter content ,by Fenton reagent - activated clay combined adsorption the removal of TOC and NH4+ -N in landfill leachate is studied under different reaction conditions .Results show that:the Fenton oxidation efficiency is the highest in conditions pH=4 .5 ,H2 O2 dosage 260 mmol/L ,H2 O2/Fe2+ molar ratio of 13 ,50 mins of reaction time and 90 mins of precipitation;when pH=3 .5 , adsorbent dosage of 140 g/L ,adsorption time is 50 min ,water leachate TOC value is least and the removal rate is 82 .85% . GC-MS analysis reveals that for organic hydrocarbons or phenol-rich organic matter in the wastewater ,it is best to take physical adsorption and not chemisorption instead .After oxidation-landfill leachate treatment adsorption process ,the efflu-ent meets emission standards .%垃圾渗滤液是一种高浓度有机废水 ,为了降低其有机质含量 ,通过Fenton试剂-活性白土联合吸附法 ,研究了在不同反应条件下垃圾渗滤液中TOC和NH4+ -N的去除率.结果为 :在pH=4 .5 ,H2 O2 投加量为260 mmol/L ,H2 O2/Fe2+摩尔比为13 ,反应50 min ,沉淀90 min时 ,Fenton氧化效率最高 ;在pH=3 .5 ,吸附剂投加量为140 g/L ,吸附时间为50 min ,出水渗滤液的TOC值最小 ,去除率为82 .85% .通过GC-MS分析发现 ,富含烷烃类有机物或者苯酚类有机物的废水 ,最好采取物理吸附 ,而不是化学吸附.经过氧化-吸附过程处理垃圾渗滤液 ,出水水质达到排放标准.
展开▼
