废生物覆盖土壤对硫化氢吸附去除的特性研究——一种替代垃圾填埋场覆盖的方法。
Characterization of adsorption removal of hydrogen sulfide by waste biocover soil, an alternative landfill cover.
机构信息
Department of Environmental Engineering, Zhejiang University, Hangzhou, China.
出版信息
J Hazard Mater. 2011 Feb 15;186(1):773-8. doi: 10.1016/j.jhazmat.2010.11.062. Epub 2010 Nov 23.
Landfill is an important anthropogenic source of odorous gases. In this work, the adsorption characteristics of H(2)S on waste biocover soil, an alternative landfill cover, were investigated. The results showed that the adsorption capacity of H(2)S increased with the reduction of particle size, the increase of pH value and water content of waste biocover soil. The optimal composition of waste biocover soil, in regard to operation cost and H(2)S removal performance, was original pH value, water content of 40% (w/w) and particle size of ≤4 mm. A net increase was observed in the adsorption capacity of H(2)S with temperatures in the range of 4-35°C. The adsorption capacity of H(2)S on waste biocover soil with optimal composition reached the maximum value of 60±1 mg/kg at oxygen concentration of 10% (v/v). When H(2)S concentration was about 5% (v/v), the adsorption capacity was near saturation, maintaining at 383±40 mg/kg. Among the four experimental soils, the highest adsorption capacity of H(2)S was observed on waste biocover soil, followed by landfill cover soil, mulberry soil, and sand soil, which was only 9.8% of that of waste biocover soil.
垃圾填埋场是有臭味气体的一个重要人为来源。在这项工作中，研究了替代垃圾填埋场覆盖物的生物覆盖垃圾土对 H(2)S 的吸附特性。结果表明，H(2)S 的吸附容量随颗粒尺寸的减小、pH 值和生物覆盖垃圾土含水量的增加而增加。就运行成本和 H(2)S 去除性能而言，生物覆盖垃圾土的最佳组成是原始 pH 值、40%（w/w）的含水量和≤4mm 的颗粒尺寸。在 4-35°C 的温度范围内，观察到 H(2)S 的吸附容量净增加。在最佳组成的生物覆盖垃圾土上，当氧浓度为 10%（v/v）时，H(2)S 的吸附容量达到了 60±1mg/kg 的最大值。当 H(2)S 浓度约为 5%（v/v）时，吸附容量接近饱和，保持在 383±40mg/kg。在四种实验土壤中，H(2)S 的吸附容量最高的是生物覆盖垃圾土，其次是垃圾填埋场覆盖土壤、桑土和沙土，仅为生物覆盖垃圾土的 9.8%。
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