Impact assessment of intermediate soil cover on landfill stabilization by characterizing landfilled municipal solid waste
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- 作者：Guangxia Qi ; Dongbei Yue ; Jianguo Liu ; Rui Li ; Xiaochong Shi ; Liang He ; Jingting Guo ; Haomei Miao ; Yongfeng Nie
- 关键词：Municipal solid waste ; Landfill ; Intermediate cover ; Stabilization
- 刊名：Journal of Environmental Management
- 出版年：2013
- 出版时间：15 October, 2013
- 年：2013
- 卷：128
- 期：Complete
- 页码：259-265
- 全文大小：709 K
文摘
Waste samples at different depths of a covered municipal solid waste (MSW) landfill in Beijing, China, were excavated and characterized to investigate the impact of intermediate soil cover on waste stabilization. A comparatively high amount of unstable organic matter with 83.3?g?kg?1 dry weight (dw) total organic carbon was detected in the 6-year-old MSW, where toxic inorganic elements containing As, Cd, Cr, Cu, Mn, Ni, Pb, and Zn of 10.1, 0.98, 85.49, 259.7, 530.4, 30.5, 84.0, and 981.7?mg?kg?1?dw, respectively, largely accumulated because of the barrier effect of intermediate soil cover. This accumulation resulted in decreased microbial activities. The intermediate soil cover also caused significant reduction in moisture in MSW under the soil layer, which was as low as 25.9 % , and led to inefficient biodegradation of 8- and 10-year-old MSW. Therefore, intermediate soil cover with low permeability seems to act as a barrier that divides a landfill into two landfill cells with different degradation processes by restraining water flow and hazardous matter.