| Summary: | 碩士 === 弘光科技大學 === 職業安全與防災研究所 === 103 === From the industrial development and revolution, the large natural resources have been consumed to bring the mass productions and significantly improve human lives. Meanwhile, the fast economic development as well as fossil fuel consumption and emission resulted in the higher greenhouse gases emissions which yielded the global greenhouse effects and climate change to threat the human health and environment. Therefore, the carbon reduction becomes the important goal of global environmental protection to meet the requirement of United Nations framework of climate change convention year 1992 and Copenhagen accord of year 2009. Moreover, Taiwan government required the specific actions of all areas in manufacture, transportation, residential and daily lives systematically lead the people to low carbon society.
In Taiwan, some farmlands were contaminated with heavy metals from industrial wastewaters or illegal hazardous wastes dumping. By the end of April of year 2015, there were accumulated 5104 contaminated sites including 2667 of control contaminated sites and 2437 of released sites. The large quantities of contaminated sites were necessary to be investigated and remediated. The technologies usually remediated the contaminated farmlands were: (1) turnover and mixing (X) for lower concentrations; (2) turnover and mixing plus excavation and foreigner soil (Y) for higher concentrations. The other remediated technologies were acid washing, solidification and fixation, phytoremediation, etc.
The objective of this study was to develop the inventory of carbon emission during remediation operation in order to obtain the carbon emission hot spot for making the best strategy of reduction of carbon emission. The research methods applied were using questionnaire and interview of the remediated consultants. From the results of 11 case studies, the carbon footprint by two different technologies X and Y were within 0.82-2.1 and 057-11.48 kg/m2, respectively. The differences came from the petroleum consumption of transportation for excavation of contaminated soils and external foreigner soils. The longer distance, the higher carbon emission obtained. Besides, the major contribution of the carbon emission of diesel consumption was when turning the diggers. Therefore, the machine models of lower carbon emission factor or lower diesel consumption are suggested for future green remediation.
Keywords：carbon footprint, inventory, farmlands, heavy metals, green remediation
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