Key Laboratory for Urban Habitat Environmental Science and Technology, Peking University Shenzhen Graduate School, Shenzhen 518055, China.
Chemosphere. 2014 Feb;96:105-11. doi: 10.1016/j.chemosphere.2013.07.052. Epub 2013 Aug 19.
Odor problems associated with H2S emissions often result in odor complaints from nearby residents of C&D debris landfills, especially in the early morning. As part of a field study conducted on H2S removal ability using different cover materials, daily and seasonal H2S emissions through a soil cover layer were monitored at a C&D debris landfill to investigate factors affecting H2S emissions. H2S emission rates were not a constant, but varied seasonally, with an average emission rate of 4.67×10(-6)mgm(-2)s(-1). During a the 10-month field study, as the H2S concentration increased from 140ppm to about 3500ppm underneath the cover soil in the testing cell, H2S emissions ranged from zero to a maximum emission rate of 1.24×10(-5)mgm(-2)s(-1). Continuous emission monitoring indicated that H2S emissions even changed over time throughout the day, generally increasing from morning to afternoon, and were affected by soil moisture and temperature. Laboratory experiments were also conducted to investigate the effects of H2S concentration and cover soil moisture content on H2S emissions. The results showed that increased soil moisture reduced H2S emissions by retarding H2S migration through cover soil and dissolving H2S into soil water. The field study also indicated that due to atmospheric dispersion, high H2S emissions may not cause odor problems.
与 H2S 排放相关的气味问题经常导致 C&D 渣土填埋场附近居民的气味投诉，尤其是在清晨。作为使用不同覆盖材料去除 H2S 能力的现场研究的一部分，在 C&D 渣土填埋场监测了土壤覆盖层中每天和季节性的 H2S 排放，以研究影响 H2S 排放的因素。H2S 排放率不是恒定的，而是随季节变化，平均排放率为 4.67×10(-6)mgm(-2)s(-1)。在 10 个月的现场研究中，随着测试单元中覆盖土壤下的 H2S 浓度从 140ppm 增加到约 3500ppm，H2S 排放量从 0 到最大排放率 1.24×10(-5)mgm(-2)s(-1)不等。连续排放监测表明，H2S 排放甚至在一天内随着时间的推移而变化，通常从早晨到下午逐渐增加，并且受到土壤湿度和温度的影响。实验室实验还研究了 H2S 浓度和覆盖土壤水分含量对 H2S 排放的影响。结果表明，增加土壤湿度会通过减缓 H2S 通过覆盖土壤的迁移和将 H2S 溶解到土壤水中来减少 H2S 排放。现场研究还表明，由于大气扩散，高 H2S 排放可能不会导致气味问题。
