湿污泥热解残渣微观孔隙结构及吸附性能

发布时间：2018-05-16 00:39

本文选题：湿污泥 + 热解残渣　；参考：《燃烧科学与技术》2016年02期

【摘要】：采用管式炉热解反应器对不同含水率污泥开展高温热解制备残渣样品,采用氮气等温吸附/脱附法分析了含水率对残渣孔隙结构和表面形貌演变的影响规律,探讨了热解残渣作为废液中重金属和染料吸附剂的可行性.研究发现:与干污泥热解残渣相比,湿污泥热解残渣孔隙结构得到更充分发展,孔径2~10,nm的中孔数量明显增加,且在孔径3.75,nm出现单峰值.随着含水率增加至84%,,残渣BET比表面积、累积总孔容积、微孔孔容等呈现减小、增大再减小的趋势;热解残渣对废液中Cu2+、Cr6+以及亚甲基蓝、孔雀石绿染料均有一定的吸附能力.
[Abstract]:The high temperature pyrolysis of sludge with different moisture content was carried out in a tubular furnace pyrolysis reactor to prepare residue samples. The effects of water content on the evolution of pore structure and surface morphology of residual sludge were analyzed by nitrogen adsorption / desorption method. The feasibility of pyrolysis residue as adsorbent for heavy metals and dyes in waste liquid was discussed. It is found that compared with dry sludge pyrolysis residue, the pore structure of wet sludge pyrolysis residue is more fully developed, and the number of mesopore at 210nm is obviously increased, and the peak pore size is 3.75 nm. With the increase of water content to 84%, the specific surface area of residual BET, cumulative total pore volume and micropore volume decrease, and then decrease. The pyrolysis residue has a certain adsorption capacity for Cu2 Cr6, methylene blue and malachite green dyes in waste liquid.
【作者单位】：浙江工业大学能源与动力工程研究所;
【基金】：国家自然科学基金资助项目(51008279) 浙江省自然科学基金资助项目(Y5100258)
【分类号】：X703

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