Investigation of solid waste disposal alternatives in lavan island using life cycle assessment approach

Escalating development of tourism and petroleum industries in small islands such as Lavan-Iran requires sound solid waste management. In the present investigation, three scenarios which consist of the combination of landfill, recycling, incineration and composting and their environmental impacts have been evaluated for 7514 Kg/day of waste generation in Lavan island. For this purpose, life cycle assessment was used. The environmental impact assessment was carried out by Eco-indicator 99. The impacts include health [organic substances, inorganic substances, climate change, ionizing radiation, and ozone layer depletion], ecosystem quality [ecotoxic emissions, acidification, eutrophication and double coating] and resources [extraction of minerals and the fossil fuels]. Although all three scenarios have positive impacts on the environment, the third one causes the least damage. Introduced Scenario one has the most adverse effects on human health and ecosystem quality. However, introduced scenario Two has less than the others. In general, the effects of scenario three [landfilling plus recycling, incineration and composting] is less than the other two scenarios which makes it a better candidate for further investigations

[Chemical components of essential oil and antimicrobial effects of rhizomes from cyperus rotundus L.]

Cyperus rotundus L. belongs to Cyperaceae family, which grows in around of Iran and its roots with other herbs uses as antiflatulant and nervous tonic. Identification of chemical components of essential oil and antimicrobial effects of rhizomes from Cyperus rotundus L. The roots and rhizomes of C. rotundus were purchased from Tehran herb shops in June 2007. After confirmation, the essential oil was obtained by hydrodistillation and was subjected to GC/MS. The antimicrobial effects of the root extract were studied on Salmonella, Escherichia coli, Micrococcus luteus, Staphylococcus aureus, Aspergillus niger and Cladosporium herebaceum. The major components of the essential oil were found alpha-cyperone [32.0%] and spathulenol [11/0%]. The study of antimicrobial activity showed that the methanolic extracts have effects on Micrococcus luteus and Staphylococcus aureus, but any effects on Salomonella, Escherichia coli, Aspergillus niger and Cladosporium herebaceum were not showed. 25 Components [91.2% of the oil] were identified, totally. Sesquiterpenoides are major components [0.82%], and then monoterpenoids [8.8%]. Alpha-cyperone as major compound of our oil, was identified in the other research on oil of C. rotundus. Inhibitory concentrations for Micrococcus luteus and Staphylococcus aureus were 31.25 and 125 mg/ml