Bagreev Andrey, Bandosz Teresa J
Department of Chemistry, The International Center for Water Resources and Environmental Research of The City College of New York, The Graduate School of The City University of New York, New York, New York 10031, USA.
Environ Sci Technol. 2004 Jan 1;38(1):345-51. doi: 10.1021/es0303438.
Terrene, sewage sludge derived granulated fertilizer, was impregnated with spent mineral oil and then pyrolyzed at 600, 800, and 950 degrees C. Materials obtained were characterized from the point of view of the pore structure and surface chemistry. Then the H2S breakthrough capacitywas measured using a lab designed test. The results showed that the new adsorbents over perform by 30% materials obtained by simple thermal treatment of Terrene and by 230% virgin coconut shell based activated carbon. The surface reaction products were evaluated using thermal analysis. On the surface of new adsorbents hydrogen sulfide is oxidized mainly to elemental sulfur which is then deposited within the pore system. The breakthrough occurs when all small pores available to promote catalytic oxidation (caused by the inorganic sludge component) are filled with sulfur. An increase in pyrolysis temperature leads to an improvement in the performance of materials as hydrogen sulfide adsorbents. This is caused likely by changes in an inorganic phase and inorganic/carbonaceous phase interactions during pyrolysis.
将源自污水污泥的粒状肥料Terrene用废矿物油浸渍，然后在600、800和950摄氏度下进行热解。从孔隙结构和表面化学的角度对所得材料进行了表征。然后使用实验室设计的测试方法测量了硫化氢穿透容量。结果表明，新型吸附剂的性能比通过对Terrene进行简单热处理得到的材料高出30%，比基于椰壳的原始活性炭高出230%。使用热分析对表面反应产物进行了评估。在新型吸附剂表面，硫化氢主要被氧化为元素硫，然后沉积在孔隙系统中。当所有可促进催化氧化的小孔（由无机污泥成分引起）都被硫填满时，就会发生穿透。热解温度的升高会导致材料作为硫化氢吸附剂的性能得到改善。这可能是由于热解过程中无机相和无机/碳质相相互作用的变化所致。
