堆肥化处理TNT红水污染土壤

发布时间：2018-05-10 19:33

  本文选题：堆肥 + TNT红水　； 参考：《环境科学研究》2017年11期

【摘要】：DNTS[二硝基甲苯磺酸盐,主要包括2,4-DNT-3-SO3-(2,4-二硝基甲苯-3-磺酸盐)和2,4-DNT-5-SO3-(2,4-二硝基甲苯-5-磺酸盐]是TNT(2,4,6-三硝基甲苯)红水污染土壤中主要污染物质,为研究堆肥化对土壤中DNTS的降解效果,采用有机废物堆肥方法,探讨堆肥化对TNT红水污染土壤中DNTS降解的可行性,以及温度、含水率和pH变化对降解效果的影响.结果表明,有机废物堆肥能处理TNT红水污染土壤,在堆肥60 d内,5个堆肥体系(猪粪+木屑、猪粪+麦壳、污泥+木屑、污泥+麦壳和马粪+木屑)对2,4-DNT-3-SO3-的降解率为65.5%~88.4%,对2,4-DNT-5-SO3-的降解率为60.9%~100%.在第4天各堆肥体系的高温阶段(29.7~53.6℃),5个堆肥化体系中2,4-DNT-3-SO3-总量的49.5%~67.3%被降解,说明各堆体的中温-高温阶段对有机物的降解起重要作用.堆体含水率随堆肥时间的延长呈下降趋势,在堆肥第8天,外源补水至体系含水率为50%,猪粪+麦壳体系对2,4-DNT-3-SO3-的降解率从70.2%增至88.4%,说明适当的外源补水可提高2,4-DNT-3-SO3-的降解率.5个堆肥体系中pH均呈初期上升、后期下降并趋于稳定的趋势,但在整个堆肥过程中,堆体pH始终保持在7.3~8.3之间.研究显示,5个堆肥体系中猪粪+麦壳体系对DNTS的降解率最高,分别为88.4%和100%.
[Abstract]:DNTS [dinitrotoluene sulfonate, mainly composed of 2o 4-DNT-3-SO3-O2-DNT-4-dinitrotoluene-3-sulfonate] and 24-DNT-5-SO3-H2NT-5-DNT-4-dinitrotoluene-5-sulfonate are the main pollutants in the red water polluted soil, in order to study the effect of composting on the degradation of DNTS in the soil, the main pollutants in the red water pollution soil are the dinitrotoluene sulfonate (dinitrotoluene sulfonate) and the dinitrotoluene sulfonate (2NT-5-dinitrotoluene sulfonate). The feasibility of composting the degradation of DNTS in TNT red water polluted soil by composting and the effects of temperature, water content and pH on the degradation were discussed. The results showed that organic waste compost could treat TNT red water polluted soil. Within 60 days of composting, 5 composting systems (pig manure sawdust, pig manure wheat husk, sludge sawdust) were used. The degradation rate of 24-DNT-3-SO3- by sludge wheat husk and horse dung sawdust was 65.5and 88.4, and the degradation rate of 2nT-5-SO3- was 60.9% and 100% respectively. On the 4th day, 67.3% of the total amount of 24-DNT-3-SO3- in 5 composting systems was degraded in the high temperature stage of 29.7 鈩，

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