Volatile Organochlorine Compounds Emitted by Temperate Coniferous Forests
نویسندگان
چکیده
correspondence should be addressed) are with the Institute of Experimental Botany, Academy Sciences Czech Republic, Videnska 1083, 14220 Prague, Czech Republic (phone: +420-241062484; fax: +420-241062150; e-mail: [email protected], [email protected]). J. Doležalová and Z. Wimmer are with the Institute of Chemical Technology, Prague, Technická 5, 16628 Prague, Czech Republic (e-mail: [email protected], [email protected]). Abstract—Chlorine is one of the most abundant elements in nature, which undergoes a complex biogeochemical cycle. Chlorine bound in some substances is partly responsible for atmospheric ozone depletion and contamination of some ecosystems. As due to international regulations anthropogenic burden of volatile organochlorines (VOCls) in atmosphere decreases, natural sources (plants, soil, abiotic formation) are expected to dominate VOCl production in the near future. Examples of plant VOCl production are methyl chloride, and bromide emission from (sub)tropical ferns, chloroform, 1,1,1-trichloroethane and tetrachloromethane emission from temperate forest fern and moss. Temperate forests are found to emit in addition to the previous compounds tetrachloroethene, and brominated volatile compounds. VOCls can be taken up and further metabolized in plants. The aim of this work is to identify and quantitatively analyze the formed VOCls in temperate forest ecosystems by a cryofocusing/GC-ECD detection method, hence filling a gap of knowledge in the biogeochemical cycle of chlorine.
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تاریخ انتشار 2013