海口市生活垃圾碳输出研究

生活垃圾的碳输出是城市生态系统碳循环的环节之一,而且与城市环境污染密切有关.研究生活垃圾碳输出是研究城市生态系统碳循环的基础工作,还有助于分析城市居民消费的环境影响.基于实地采样和数据收集获得的生活垃圾数据,分析了海口市生活垃圾碳输出的现状和趋势.结果表明,2001年海口市26.92×10⁴t生活垃圾的碳输出量为10.51×10⁴t,每人每天生活垃圾的碳输出量为0.326kg,其中31%左右的碳在填埋方式下转化成CH₄、CO₂和渗沥水中的有机物,69%左右的碳被长期固定.在被固定的碳中,约33%的来源于大气,这说明生活垃圾可能是碳汇.1991～1999年,海口市生活垃圾碳输出呈现明显增长趋势,年均增长率为9.55%,其中,可被固定在生活垃圾中的碳量增长趋势较为明显,年增长率达到13.23%.海口市生活垃圾碳增加与人均消费支出和人口数的增加呈显著相关,表明人均消费支出和人口数对生活垃圾碳输出具有一定的影响.

Carbon Output Through Urban Domestic Garbage in Haikou

Carbon output through urban domestic garbage is one part of carbon cycle in urban ecosystem which is related to some environmental pollution. Researches on carbon output through urban domestic garbage is the foundational work on carbon cycle in urban ecosystem, but also can help to analyze the influences of residents' consumption on environment. Based on data got through sampling and collecting, the status and trend of carbon output through domestic garbage in Haikou was analyzed. The results showed that, the total carbon output through 26.92×10⁴ t of domestic garbage is 10.51×10⁴ t and the carbon output per capita everyday is 0.326 kg/(cap.d)^-1 in 2001. About 31% of the total carbon will be transferred into methane, carbon dioxide and organic matter in extravasate. About 69% of the total carbon will be sequestrated in landfill. Because 33% of the sequestrated carbon originate from atmosphere, urban domestic garbage may be a carbon sink. From 1991 to 1999, the carbon output through Haikou's domestic garbage is annually increasing by 9.55%, and the output of sequestrated carbon is annually increasing remarkably by 13.23%. The increase of carbon output is significantly correlated with the increase of expenditure per capita and population, which shows expenditure per capita and population have some effect on carbon output.